Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 6364 insertions, 0 deletions

diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c
new file mode 100644
index 000000000..dc91ac8cb
--- /dev/null
+++ b/drivers/net/wireless/marvell/mwl8k.c
@@ -0,0 +1,6364 @@
+/*
+ * drivers/net/wireless/mwl8k.c
+ * Driver for Marvell TOPDOG 802.11 Wireless cards
+ *
+ * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/etherdevice.h>
+#include <linux/slab.h>
+#include <net/mac80211.h>
+#include <linux/moduleparam.h>
+#include <linux/firmware.h>
+#include <linux/workqueue.h>
+
+#define MWL8K_DESC	"Marvell TOPDOG(R) 802.11 Wireless Network Driver"
+#define MWL8K_NAME	KBUILD_MODNAME
+#define MWL8K_VERSION	"0.13"
+
+/* Module parameters */
+static bool ap_mode_default;
+module_param(ap_mode_default, bool, 0);
+MODULE_PARM_DESC(ap_mode_default,
+		 "Set to 1 to make ap mode the default instead of sta mode");
+
+/* Register definitions */
+#define MWL8K_HIU_GEN_PTR			0x00000c10
+#define  MWL8K_MODE_STA				 0x0000005a
+#define  MWL8K_MODE_AP				 0x000000a5
+#define MWL8K_HIU_INT_CODE			0x00000c14
+#define  MWL8K_FWSTA_READY			 0xf0f1f2f4
+#define  MWL8K_FWAP_READY			 0xf1f2f4a5
+#define  MWL8K_INT_CODE_CMD_FINISHED		 0x00000005
+#define MWL8K_HIU_SCRATCH			0x00000c40
+
+/* Host->device communications */
+#define MWL8K_HIU_H2A_INTERRUPT_EVENTS		0x00000c18
+#define MWL8K_HIU_H2A_INTERRUPT_STATUS		0x00000c1c
+#define MWL8K_HIU_H2A_INTERRUPT_MASK		0x00000c20
+#define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL	0x00000c24
+#define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK	0x00000c28
+#define  MWL8K_H2A_INT_DUMMY			 (1 << 20)
+#define  MWL8K_H2A_INT_RESET			 (1 << 15)
+#define  MWL8K_H2A_INT_DOORBELL			 (1 << 1)
+#define  MWL8K_H2A_INT_PPA_READY		 (1 << 0)
+
+/* Device->host communications */
+#define MWL8K_HIU_A2H_INTERRUPT_EVENTS		0x00000c2c
+#define MWL8K_HIU_A2H_INTERRUPT_STATUS		0x00000c30
+#define MWL8K_HIU_A2H_INTERRUPT_MASK		0x00000c34
+#define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL	0x00000c38
+#define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK	0x00000c3c
+#define  MWL8K_A2H_INT_DUMMY			 (1 << 20)
+#define  MWL8K_A2H_INT_BA_WATCHDOG		 (1 << 14)
+#define  MWL8K_A2H_INT_CHNL_SWITCHED		 (1 << 11)
+#define  MWL8K_A2H_INT_QUEUE_EMPTY		 (1 << 10)
+#define  MWL8K_A2H_INT_RADAR_DETECT		 (1 << 7)
+#define  MWL8K_A2H_INT_RADIO_ON			 (1 << 6)
+#define  MWL8K_A2H_INT_RADIO_OFF		 (1 << 5)
+#define  MWL8K_A2H_INT_MAC_EVENT		 (1 << 3)
+#define  MWL8K_A2H_INT_OPC_DONE			 (1 << 2)
+#define  MWL8K_A2H_INT_RX_READY			 (1 << 1)
+#define  MWL8K_A2H_INT_TX_DONE			 (1 << 0)
+
+/* HW micro second timer register
+ * located at offset 0xA600. This
+ * will be used to timestamp tx
+ * packets.
+ */
+
+#define	MWL8K_HW_TIMER_REGISTER			0x0000a600
+#define BBU_RXRDY_CNT_REG			0x0000a860
+#define NOK_CCA_CNT_REG				0x0000a6a0
+#define BBU_AVG_NOISE_VAL			0x67
+
+#define MWL8K_A2H_EVENTS	(MWL8K_A2H_INT_DUMMY | \
+				 MWL8K_A2H_INT_CHNL_SWITCHED | \
+				 MWL8K_A2H_INT_QUEUE_EMPTY | \
+				 MWL8K_A2H_INT_RADAR_DETECT | \
+				 MWL8K_A2H_INT_RADIO_ON | \
+				 MWL8K_A2H_INT_RADIO_OFF | \
+				 MWL8K_A2H_INT_MAC_EVENT | \
+				 MWL8K_A2H_INT_OPC_DONE | \
+				 MWL8K_A2H_INT_RX_READY | \
+				 MWL8K_A2H_INT_TX_DONE | \
+				 MWL8K_A2H_INT_BA_WATCHDOG)
+
+#define MWL8K_RX_QUEUES		1
+#define MWL8K_TX_WMM_QUEUES	4
+#define MWL8K_MAX_AMPDU_QUEUES	8
+#define MWL8K_MAX_TX_QUEUES	(MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
+#define mwl8k_tx_queues(priv)	(MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
+
+/* txpriorities are mapped with hw queues.
+ * Each hw queue has a txpriority.
+ */
+#define TOTAL_HW_TX_QUEUES	8
+
+/* Each HW queue can have one AMPDU stream.
+ * But, because one of the hw queue is reserved,
+ * maximum AMPDU queues that can be created are
+ * one short of total tx queues.
+ */
+#define MWL8K_NUM_AMPDU_STREAMS	(TOTAL_HW_TX_QUEUES - 1)
+
+#define MWL8K_NUM_CHANS 18
+
+struct rxd_ops {
+	int rxd_size;
+	void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
+	void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
+	int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
+			   __le16 *qos, s8 *noise);
+};
+
+struct mwl8k_device_info {
+	char *part_name;
+	char *helper_image;
+	char *fw_image_sta;
+	char *fw_image_ap;
+	struct rxd_ops *ap_rxd_ops;
+	u32 fw_api_ap;
+};
+
+struct mwl8k_rx_queue {
+	int rxd_count;
+
+	/* hw receives here */
+	int head;
+
+	/* refill descs here */
+	int tail;
+
+	void *rxd;
+	dma_addr_t rxd_dma;
+	struct {
+		struct sk_buff *skb;
+		DEFINE_DMA_UNMAP_ADDR(dma);
+	} *buf;
+};
+
+struct mwl8k_tx_queue {
+	/* hw transmits here */
+	int head;
+
+	/* sw appends here */
+	int tail;
+
+	unsigned int len;
+	struct mwl8k_tx_desc *txd;
+	dma_addr_t txd_dma;
+	struct sk_buff **skb;
+};
+
+enum {
+	AMPDU_NO_STREAM,
+	AMPDU_STREAM_NEW,
+	AMPDU_STREAM_IN_PROGRESS,
+	AMPDU_STREAM_ACTIVE,
+};
+
+struct mwl8k_ampdu_stream {
+	struct ieee80211_sta *sta;
+	u8 tid;
+	u8 state;
+	u8 idx;
+};
+
+struct mwl8k_priv {
+	struct ieee80211_hw *hw;
+	struct pci_dev *pdev;
+	int irq;
+
+	struct mwl8k_device_info *device_info;
+
+	void __iomem *sram;
+	void __iomem *regs;
+
+	/* firmware */
+	const struct firmware *fw_helper;
+	const struct firmware *fw_ucode;
+
+	/* hardware/firmware parameters */
+	bool ap_fw;
+	struct rxd_ops *rxd_ops;
+	struct ieee80211_supported_band band_24;
+	struct ieee80211_channel channels_24[14];
+	struct ieee80211_rate rates_24[13];
+	struct ieee80211_supported_band band_50;
+	struct ieee80211_channel channels_50[9];
+	struct ieee80211_rate rates_50[8];
+	u32 ap_macids_supported;
+	u32 sta_macids_supported;
+
+	/* Ampdu stream information */
+	u8 num_ampdu_queues;
+	spinlock_t stream_lock;
+	struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
+	struct work_struct watchdog_ba_handle;
+
+	/* firmware access */
+	struct mutex fw_mutex;
+	struct task_struct *fw_mutex_owner;
+	struct task_struct *hw_restart_owner;
+	int fw_mutex_depth;
+	struct completion *hostcmd_wait;
+
+	atomic_t watchdog_event_pending;
+
+	/* lock held over TX and TX reap */
+	spinlock_t tx_lock;
+
+	/* TX quiesce completion, protected by fw_mutex and tx_lock */
+	struct completion *tx_wait;
+
+	/* List of interfaces.  */
+	u32 macids_used;
+	struct list_head vif_list;
+
+	/* power management status cookie from firmware */
+	u32 *cookie;
+	dma_addr_t cookie_dma;
+
+	u16 num_mcaddrs;
+	u8 hw_rev;
+	u32 fw_rev;
+	u32 caps;
+
+	/*
+	 * Running count of TX packets in flight, to avoid
+	 * iterating over the transmit rings each time.
+	 */
+	int pending_tx_pkts;
+
+	struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
+	struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
+	u32 txq_offset[MWL8K_MAX_TX_QUEUES];
+
+	bool radio_on;
+	bool radio_short_preamble;
+	bool sniffer_enabled;
+	bool wmm_enabled;
+
+	/* XXX need to convert this to handle multiple interfaces */
+	bool capture_beacon;
+	u8 capture_bssid[ETH_ALEN];
+	struct sk_buff *beacon_skb;
+
+	/*
+	 * This FJ worker has to be global as it is scheduled from the
+	 * RX handler.  At this point we don't know which interface it
+	 * belongs to until the list of bssids waiting to complete join
+	 * is checked.
+	 */
+	struct work_struct finalize_join_worker;
+
+	/* Tasklet to perform TX reclaim.  */
+	struct tasklet_struct poll_tx_task;
+
+	/* Tasklet to perform RX.  */
+	struct tasklet_struct poll_rx_task;
+
+	/* Most recently reported noise in dBm */
+	s8 noise;
+
+	/*
+	 * preserve the queue configurations so they can be restored if/when
+	 * the firmware image is swapped.
+	 */
+	struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
+
+	/* To perform the task of reloading the firmware */
+	struct work_struct fw_reload;
+	bool hw_restart_in_progress;
+
+	/* async firmware loading state */
+	unsigned fw_state;
+	char *fw_pref;
+	char *fw_alt;
+	bool is_8764;
+	struct completion firmware_loading_complete;
+
+	/* bitmap of running BSSes */
+	u32 running_bsses;
+
+	/* ACS related */
+	bool sw_scan_start;
+	struct ieee80211_channel *acs_chan;
+	unsigned long channel_time;
+	struct survey_info survey[MWL8K_NUM_CHANS];
+};
+
+#define MAX_WEP_KEY_LEN         13
+#define NUM_WEP_KEYS            4
+
+/* Per interface specific private data */
+struct mwl8k_vif {
+	struct list_head list;
+	struct ieee80211_vif *vif;
+
+	/* Firmware macid for this vif.  */
+	int macid;
+
+	/* Non AMPDU sequence number assigned by driver.  */
+	u16 seqno;
+
+	/* Saved WEP keys */
+	struct {
+		u8 enabled;
+		u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
+	} wep_key_conf[NUM_WEP_KEYS];
+
+	/* BSSID */
+	u8 bssid[ETH_ALEN];
+
+	/* A flag to indicate is HW crypto is enabled for this bssid */
+	bool is_hw_crypto_enabled;
+};
+#define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
+#define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
+
+struct tx_traffic_info {
+	u32 start_time;
+	u32 pkts;
+};
+
+#define MWL8K_MAX_TID 8
+struct mwl8k_sta {
+	/* Index into station database. Returned by UPDATE_STADB.  */
+	u8 peer_id;
+	u8 is_ampdu_allowed;
+	struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
+};
+#define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
+
+static const struct ieee80211_channel mwl8k_channels_24[] = {
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
+	{ .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
+};
+
+static const struct ieee80211_rate mwl8k_rates_24[] = {
+	{ .bitrate = 10, .hw_value = 2, },
+	{ .bitrate = 20, .hw_value = 4, },
+	{ .bitrate = 55, .hw_value = 11, },
+	{ .bitrate = 110, .hw_value = 22, },
+	{ .bitrate = 220, .hw_value = 44, },
+	{ .bitrate = 60, .hw_value = 12, },
+	{ .bitrate = 90, .hw_value = 18, },
+	{ .bitrate = 120, .hw_value = 24, },
+	{ .bitrate = 180, .hw_value = 36, },
+	{ .bitrate = 240, .hw_value = 48, },
+	{ .bitrate = 360, .hw_value = 72, },
+	{ .bitrate = 480, .hw_value = 96, },
+	{ .bitrate = 540, .hw_value = 108, },
+};
+
+static const struct ieee80211_channel mwl8k_channels_50[] = {
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, },
+	{ .band = NL80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, },
+};
+
+static const struct ieee80211_rate mwl8k_rates_50[] = {
+	{ .bitrate = 60, .hw_value = 12, },
+	{ .bitrate = 90, .hw_value = 18, },
+	{ .bitrate = 120, .hw_value = 24, },
+	{ .bitrate = 180, .hw_value = 36, },
+	{ .bitrate = 240, .hw_value = 48, },
+	{ .bitrate = 360, .hw_value = 72, },
+	{ .bitrate = 480, .hw_value = 96, },
+	{ .bitrate = 540, .hw_value = 108, },
+};
+
+/* Set or get info from Firmware */
+#define MWL8K_CMD_GET			0x0000
+#define MWL8K_CMD_SET			0x0001
+#define MWL8K_CMD_SET_LIST		0x0002
+
+/* Firmware command codes */
+#define MWL8K_CMD_CODE_DNLD		0x0001
+#define MWL8K_CMD_GET_HW_SPEC		0x0003
+#define MWL8K_CMD_SET_HW_SPEC		0x0004
+#define MWL8K_CMD_MAC_MULTICAST_ADR	0x0010
+#define MWL8K_CMD_GET_STAT		0x0014
+#define MWL8K_CMD_BBP_REG_ACCESS	0x001a
+#define MWL8K_CMD_RADIO_CONTROL		0x001c
+#define MWL8K_CMD_RF_TX_POWER		0x001e
+#define MWL8K_CMD_TX_POWER		0x001f
+#define MWL8K_CMD_RF_ANTENNA		0x0020
+#define MWL8K_CMD_SET_BEACON		0x0100		/* per-vif */
+#define MWL8K_CMD_SET_PRE_SCAN		0x0107
+#define MWL8K_CMD_SET_POST_SCAN		0x0108
+#define MWL8K_CMD_SET_RF_CHANNEL	0x010a
+#define MWL8K_CMD_SET_AID		0x010d
+#define MWL8K_CMD_SET_RATE		0x0110
+#define MWL8K_CMD_SET_FINALIZE_JOIN	0x0111
+#define MWL8K_CMD_RTS_THRESHOLD		0x0113
+#define MWL8K_CMD_SET_SLOT		0x0114
+#define MWL8K_CMD_SET_EDCA_PARAMS	0x0115
+#define MWL8K_CMD_SET_WMM_MODE		0x0123
+#define MWL8K_CMD_MIMO_CONFIG		0x0125
+#define MWL8K_CMD_USE_FIXED_RATE	0x0126
+#define MWL8K_CMD_ENABLE_SNIFFER	0x0150
+#define MWL8K_CMD_SET_MAC_ADDR		0x0202		/* per-vif */
+#define MWL8K_CMD_SET_RATEADAPT_MODE	0x0203
+#define MWL8K_CMD_GET_WATCHDOG_BITMAP	0x0205
+#define MWL8K_CMD_DEL_MAC_ADDR		0x0206		/* per-vif */
+#define MWL8K_CMD_BSS_START		0x1100		/* per-vif */
+#define MWL8K_CMD_SET_NEW_STN		0x1111		/* per-vif */
+#define MWL8K_CMD_UPDATE_ENCRYPTION	0x1122		/* per-vif */
+#define MWL8K_CMD_UPDATE_STADB		0x1123
+#define MWL8K_CMD_BASTREAM		0x1125
+
+#define MWL8K_LEGACY_5G_RATE_OFFSET \
+	(ARRAY_SIZE(mwl8k_rates_24) - ARRAY_SIZE(mwl8k_rates_50))
+
+static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
+{
+	u16 command = le16_to_cpu(cmd);
+
+#define MWL8K_CMDNAME(x)	case MWL8K_CMD_##x: do {\
+					snprintf(buf, bufsize, "%s", #x);\
+					return buf;\
+					} while (0)
+	switch (command & ~0x8000) {
+		MWL8K_CMDNAME(CODE_DNLD);
+		MWL8K_CMDNAME(GET_HW_SPEC);
+		MWL8K_CMDNAME(SET_HW_SPEC);
+		MWL8K_CMDNAME(MAC_MULTICAST_ADR);
+		MWL8K_CMDNAME(GET_STAT);
+		MWL8K_CMDNAME(RADIO_CONTROL);
+		MWL8K_CMDNAME(RF_TX_POWER);
+		MWL8K_CMDNAME(TX_POWER);
+		MWL8K_CMDNAME(RF_ANTENNA);
+		MWL8K_CMDNAME(SET_BEACON);
+		MWL8K_CMDNAME(SET_PRE_SCAN);
+		MWL8K_CMDNAME(SET_POST_SCAN);
+		MWL8K_CMDNAME(SET_RF_CHANNEL);
+		MWL8K_CMDNAME(SET_AID);
+		MWL8K_CMDNAME(SET_RATE);
+		MWL8K_CMDNAME(SET_FINALIZE_JOIN);
+		MWL8K_CMDNAME(RTS_THRESHOLD);
+		MWL8K_CMDNAME(SET_SLOT);
+		MWL8K_CMDNAME(SET_EDCA_PARAMS);
+		MWL8K_CMDNAME(SET_WMM_MODE);
+		MWL8K_CMDNAME(MIMO_CONFIG);
+		MWL8K_CMDNAME(USE_FIXED_RATE);
+		MWL8K_CMDNAME(ENABLE_SNIFFER);
+		MWL8K_CMDNAME(SET_MAC_ADDR);
+		MWL8K_CMDNAME(SET_RATEADAPT_MODE);
+		MWL8K_CMDNAME(BSS_START);
+		MWL8K_CMDNAME(SET_NEW_STN);
+		MWL8K_CMDNAME(UPDATE_ENCRYPTION);
+		MWL8K_CMDNAME(UPDATE_STADB);
+		MWL8K_CMDNAME(BASTREAM);
+		MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
+	default:
+		snprintf(buf, bufsize, "0x%x", cmd);
+	}
+#undef MWL8K_CMDNAME
+
+	return buf;
+}
+
+/* Hardware and firmware reset */
+static void mwl8k_hw_reset(struct mwl8k_priv *priv)
+{
+	iowrite32(MWL8K_H2A_INT_RESET,
+		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+	iowrite32(MWL8K_H2A_INT_RESET,
+		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+	msleep(20);
+}
+
+/* Release fw image */
+static void mwl8k_release_fw(const struct firmware **fw)
+{
+	if (*fw == NULL)
+		return;
+	release_firmware(*fw);
+	*fw = NULL;
+}
+
+static void mwl8k_release_firmware(struct mwl8k_priv *priv)
+{
+	mwl8k_release_fw(&priv->fw_ucode);
+	mwl8k_release_fw(&priv->fw_helper);
+}
+
+/* states for asynchronous f/w loading */
+static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
+enum {
+	FW_STATE_INIT = 0,
+	FW_STATE_LOADING_PREF,
+	FW_STATE_LOADING_ALT,
+	FW_STATE_ERROR,
+};
+
+/* Request fw image */
+static int mwl8k_request_fw(struct mwl8k_priv *priv,
+			    const char *fname, const struct firmware **fw,
+			    bool nowait)
+{
+	/* release current image */
+	if (*fw != NULL)
+		mwl8k_release_fw(fw);
+
+	if (nowait)
+		return request_firmware_nowait(THIS_MODULE, 1, fname,
+					       &priv->pdev->dev, GFP_KERNEL,
+					       priv, mwl8k_fw_state_machine);
+	else
+		return request_firmware(fw, fname, &priv->pdev->dev);
+}
+
+static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
+				  bool nowait)
+{
+	struct mwl8k_device_info *di = priv->device_info;
+	int rc;
+
+	if (di->helper_image != NULL) {
+		if (nowait)
+			rc = mwl8k_request_fw(priv, di->helper_image,
+					      &priv->fw_helper, true);
+		else
+			rc = mwl8k_request_fw(priv, di->helper_image,
+					      &priv->fw_helper, false);
+		if (rc)
+			printk(KERN_ERR "%s: Error requesting helper fw %s\n",
+			       pci_name(priv->pdev), di->helper_image);
+
+		if (rc || nowait)
+			return rc;
+	}
+
+	if (nowait) {
+		/*
+		 * if we get here, no helper image is needed.  Skip the
+		 * FW_STATE_INIT state.
+		 */
+		priv->fw_state = FW_STATE_LOADING_PREF;
+		rc = mwl8k_request_fw(priv, fw_image,
+				      &priv->fw_ucode,
+				      true);
+	} else
+		rc = mwl8k_request_fw(priv, fw_image,
+				      &priv->fw_ucode, false);
+	if (rc) {
+		printk(KERN_ERR "%s: Error requesting firmware file %s\n",
+		       pci_name(priv->pdev), fw_image);
+		mwl8k_release_fw(&priv->fw_helper);
+		return rc;
+	}
+
+	return 0;
+}
+
+struct mwl8k_cmd_pkt {
+	__le16	code;
+	__le16	length;
+	__u8	seq_num;
+	__u8	macid;
+	__le16	result;
+	char	payload[];
+} __packed;
+
+/*
+ * Firmware loading.
+ */
+static int
+mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
+{
+	void __iomem *regs = priv->regs;
+	dma_addr_t dma_addr;
+	int loops;
+
+	dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
+	if (pci_dma_mapping_error(priv->pdev, dma_addr))
+		return -ENOMEM;
+
+	iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
+	iowrite32(0, regs + MWL8K_HIU_INT_CODE);
+	iowrite32(MWL8K_H2A_INT_DOORBELL,
+		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+	iowrite32(MWL8K_H2A_INT_DUMMY,
+		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+
+	loops = 1000;
+	do {
+		u32 int_code;
+		if (priv->is_8764) {
+			int_code = ioread32(regs +
+					    MWL8K_HIU_H2A_INTERRUPT_STATUS);
+			if (int_code == 0)
+				break;
+		} else {
+			int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
+			if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
+				iowrite32(0, regs + MWL8K_HIU_INT_CODE);
+				break;
+			}
+		}
+		cond_resched();
+		udelay(1);
+	} while (--loops);
+
+	pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
+
+	return loops ? 0 : -ETIMEDOUT;
+}
+
+static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
+				const u8 *data, size_t length)
+{
+	struct mwl8k_cmd_pkt *cmd;
+	int done;
+	int rc = 0;
+
+	cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
+	cmd->seq_num = 0;
+	cmd->macid = 0;
+	cmd->result = 0;
+
+	done = 0;
+	while (length) {
+		int block_size = length > 256 ? 256 : length;
+
+		memcpy(cmd->payload, data + done, block_size);
+		cmd->length = cpu_to_le16(block_size);
+
+		rc = mwl8k_send_fw_load_cmd(priv, cmd,
+						sizeof(*cmd) + block_size);
+		if (rc)
+			break;
+
+		done += block_size;
+		length -= block_size;
+	}
+
+	if (!rc) {
+		cmd->length = 0;
+		rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
+	}
+
+	kfree(cmd);
+
+	return rc;
+}
+
+static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
+				const u8 *data, size_t length)
+{
+	unsigned char *buffer;
+	int may_continue, rc = 0;
+	u32 done, prev_block_size;
+
+	buffer = kmalloc(1024, GFP_KERNEL);
+	if (buffer == NULL)
+		return -ENOMEM;
+
+	done = 0;
+	prev_block_size = 0;
+	may_continue = 1000;
+	while (may_continue > 0) {
+		u32 block_size;
+
+		block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
+		if (block_size & 1) {
+			block_size &= ~1;
+			may_continue--;
+		} else {
+			done += prev_block_size;
+			length -= prev_block_size;
+		}
+
+		if (block_size > 1024 || block_size > length) {
+			rc = -EOVERFLOW;
+			break;
+		}
+
+		if (length == 0) {
+			rc = 0;
+			break;
+		}
+
+		if (block_size == 0) {
+			rc = -EPROTO;
+			may_continue--;
+			udelay(1);
+			continue;
+		}
+
+		prev_block_size = block_size;
+		memcpy(buffer, data + done, block_size);
+
+		rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
+		if (rc)
+			break;
+	}
+
+	if (!rc && length != 0)
+		rc = -EREMOTEIO;
+
+	kfree(buffer);
+
+	return rc;
+}
+
+static int mwl8k_load_firmware(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	const struct firmware *fw = priv->fw_ucode;
+	int rc;
+	int loops;
+
+	if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
+		const struct firmware *helper = priv->fw_helper;
+
+		if (helper == NULL) {
+			printk(KERN_ERR "%s: helper image needed but none "
+			       "given\n", pci_name(priv->pdev));
+			return -EINVAL;
+		}
+
+		rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
+		if (rc) {
+			printk(KERN_ERR "%s: unable to load firmware "
+			       "helper image\n", pci_name(priv->pdev));
+			return rc;
+		}
+		msleep(20);
+
+		rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
+	} else {
+		if (priv->is_8764)
+			rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
+		else
+			rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
+	}
+
+	if (rc) {
+		printk(KERN_ERR "%s: unable to load firmware image\n",
+		       pci_name(priv->pdev));
+		return rc;
+	}
+
+	iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
+
+	loops = 500000;
+	do {
+		u32 ready_code;
+
+		ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
+		if (ready_code == MWL8K_FWAP_READY) {
+			priv->ap_fw = true;
+			break;
+		} else if (ready_code == MWL8K_FWSTA_READY) {
+			priv->ap_fw = false;
+			break;
+		}
+
+		cond_resched();
+		udelay(1);
+	} while (--loops);
+
+	return loops ? 0 : -ETIMEDOUT;
+}
+
+
+/* DMA header used by firmware and hardware.  */
+struct mwl8k_dma_data {
+	__le16 fwlen;
+	struct ieee80211_hdr wh;
+	char data[];
+} __packed;
+
+/* Routines to add/remove DMA header from skb.  */
+static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
+{
+	struct mwl8k_dma_data *tr;
+	int hdrlen;
+
+	tr = (struct mwl8k_dma_data *)skb->data;
+	hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
+
+	if (hdrlen != sizeof(tr->wh)) {
+		if (ieee80211_is_data_qos(tr->wh.frame_control)) {
+			memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
+			*((__le16 *)(tr->data - 2)) = qos;
+		} else {
+			memmove(tr->data - hdrlen, &tr->wh, hdrlen);
+		}
+	}
+
+	if (hdrlen != sizeof(*tr))
+		skb_pull(skb, sizeof(*tr) - hdrlen);
+}
+
+#define REDUCED_TX_HEADROOM	8
+
+static void
+mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
+						int head_pad, int tail_pad)
+{
+	struct ieee80211_hdr *wh;
+	int hdrlen;
+	int reqd_hdrlen;
+	struct mwl8k_dma_data *tr;
+
+	/*
+	 * Add a firmware DMA header; the firmware requires that we
+	 * present a 2-byte payload length followed by a 4-address
+	 * header (without QoS field), followed (optionally) by any
+	 * WEP/ExtIV header (but only filled in for CCMP).
+	 */
+	wh = (struct ieee80211_hdr *)skb->data;
+
+	hdrlen = ieee80211_hdrlen(wh->frame_control);
+
+	/*
+	 * Check if skb_resize is required because of
+	 * tx_headroom adjustment.
+	 */
+	if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
+						+ REDUCED_TX_HEADROOM))) {
+		if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
+
+			wiphy_err(priv->hw->wiphy,
+					"Failed to reallocate TX buffer\n");
+			return;
+		}
+		skb->truesize += REDUCED_TX_HEADROOM;
+	}
+
+	reqd_hdrlen = sizeof(*tr) + head_pad;
+
+	if (hdrlen != reqd_hdrlen)
+		skb_push(skb, reqd_hdrlen - hdrlen);
+
+	if (ieee80211_is_data_qos(wh->frame_control))
+		hdrlen -= IEEE80211_QOS_CTL_LEN;
+
+	tr = (struct mwl8k_dma_data *)skb->data;
+	if (wh != &tr->wh)
+		memmove(&tr->wh, wh, hdrlen);
+	if (hdrlen != sizeof(tr->wh))
+		memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
+
+	/*
+	 * Firmware length is the length of the fully formed "802.11
+	 * payload".  That is, everything except for the 802.11 header.
+	 * This includes all crypto material including the MIC.
+	 */
+	tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
+}
+
+static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
+		struct sk_buff *skb)
+{
+	struct ieee80211_hdr *wh;
+	struct ieee80211_tx_info *tx_info;
+	struct ieee80211_key_conf *key_conf;
+	int data_pad;
+	int head_pad = 0;
+
+	wh = (struct ieee80211_hdr *)skb->data;
+
+	tx_info = IEEE80211_SKB_CB(skb);
+
+	key_conf = NULL;
+	if (ieee80211_is_data(wh->frame_control))
+		key_conf = tx_info->control.hw_key;
+
+	/*
+	 * Make sure the packet header is in the DMA header format (4-address
+	 * without QoS), and add head & tail padding when HW crypto is enabled.
+	 *
+	 * We have the following trailer padding requirements:
+	 * - WEP: 4 trailer bytes (ICV)
+	 * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
+	 * - CCMP: 8 trailer bytes (MIC)
+	 */
+	data_pad = 0;
+	if (key_conf != NULL) {
+		head_pad = key_conf->iv_len;
+		switch (key_conf->cipher) {
+		case WLAN_CIPHER_SUITE_WEP40:
+		case WLAN_CIPHER_SUITE_WEP104:
+			data_pad = 4;
+			break;
+		case WLAN_CIPHER_SUITE_TKIP:
+			data_pad = 12;
+			break;
+		case WLAN_CIPHER_SUITE_CCMP:
+			data_pad = 8;
+			break;
+		}
+	}
+	mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
+}
+
+/*
+ * Packet reception for 88w8366/88w8764 AP firmware.
+ */
+struct mwl8k_rxd_ap {
+	__le16 pkt_len;
+	__u8 sq2;
+	__u8 rate;
+	__le32 pkt_phys_addr;
+	__le32 next_rxd_phys_addr;
+	__le16 qos_control;
+	__le16 htsig2;
+	__le32 hw_rssi_info;
+	__le32 hw_noise_floor_info;
+	__u8 noise_floor;
+	__u8 pad0[3];
+	__u8 rssi;
+	__u8 rx_status;
+	__u8 channel;
+	__u8 rx_ctrl;
+} __packed;
+
+#define MWL8K_AP_RATE_INFO_MCS_FORMAT		0x80
+#define MWL8K_AP_RATE_INFO_40MHZ		0x40
+#define MWL8K_AP_RATE_INFO_RATEID(x)		((x) & 0x3f)
+
+#define MWL8K_AP_RX_CTRL_OWNED_BY_HOST		0x80
+
+/* 8366/8764 AP rx_status bits */
+#define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK		0x80
+#define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR		0xFF
+#define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR		0x02
+#define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR		0x04
+#define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR		0x08
+
+static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
+{
+	struct mwl8k_rxd_ap *rxd = _rxd;
+
+	rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
+	rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
+}
+
+static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
+{
+	struct mwl8k_rxd_ap *rxd = _rxd;
+
+	rxd->pkt_len = cpu_to_le16(len);
+	rxd->pkt_phys_addr = cpu_to_le32(addr);
+	wmb();
+	rxd->rx_ctrl = 0;
+}
+
+static int
+mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
+		     __le16 *qos, s8 *noise)
+{
+	struct mwl8k_rxd_ap *rxd = _rxd;
+
+	if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
+		return -1;
+	rmb();
+
+	memset(status, 0, sizeof(*status));
+
+	status->signal = -rxd->rssi;
+	*noise = -rxd->noise_floor;
+
+	if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
+		status->encoding = RX_ENC_HT;
+		if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
+			status->bw = RATE_INFO_BW_40;
+		status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
+	} else {
+		int i;
+
+		for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
+			if (mwl8k_rates_24[i].hw_value == rxd->rate) {
+				status->rate_idx = i;
+				break;
+			}
+		}
+	}
+
+	if (rxd->channel > 14) {
+		status->band = NL80211_BAND_5GHZ;
+		if (!(status->encoding == RX_ENC_HT) &&
+		    status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
+			status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
+	} else {
+		status->band = NL80211_BAND_2GHZ;
+	}
+	status->freq = ieee80211_channel_to_frequency(rxd->channel,
+						      status->band);
+
+	*qos = rxd->qos_control;
+
+	if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
+	    (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
+	    (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
+		status->flag |= RX_FLAG_MMIC_ERROR;
+
+	return le16_to_cpu(rxd->pkt_len);
+}
+
+static struct rxd_ops rxd_ap_ops = {
+	.rxd_size	= sizeof(struct mwl8k_rxd_ap),
+	.rxd_init	= mwl8k_rxd_ap_init,
+	.rxd_refill	= mwl8k_rxd_ap_refill,
+	.rxd_process	= mwl8k_rxd_ap_process,
+};
+
+/*
+ * Packet reception for STA firmware.
+ */
+struct mwl8k_rxd_sta {
+	__le16 pkt_len;
+	__u8 link_quality;
+	__u8 noise_level;
+	__le32 pkt_phys_addr;
+	__le32 next_rxd_phys_addr;
+	__le16 qos_control;
+	__le16 rate_info;
+	__le32 pad0[4];
+	__u8 rssi;
+	__u8 channel;
+	__le16 pad1;
+	__u8 rx_ctrl;
+	__u8 rx_status;
+	__u8 pad2[2];
+} __packed;
+
+#define MWL8K_STA_RATE_INFO_SHORTPRE		0x8000
+#define MWL8K_STA_RATE_INFO_ANTSELECT(x)	(((x) >> 11) & 0x3)
+#define MWL8K_STA_RATE_INFO_RATEID(x)		(((x) >> 3) & 0x3f)
+#define MWL8K_STA_RATE_INFO_40MHZ		0x0004
+#define MWL8K_STA_RATE_INFO_SHORTGI		0x0002
+#define MWL8K_STA_RATE_INFO_MCS_FORMAT		0x0001
+
+#define MWL8K_STA_RX_CTRL_OWNED_BY_HOST		0x02
+#define MWL8K_STA_RX_CTRL_DECRYPT_ERROR		0x04
+/* ICV=0 or MIC=1 */
+#define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE		0x08
+/* Key is uploaded only in failure case */
+#define MWL8K_STA_RX_CTRL_KEY_INDEX			0x30
+
+static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
+{
+	struct mwl8k_rxd_sta *rxd = _rxd;
+
+	rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
+	rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
+}
+
+static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
+{
+	struct mwl8k_rxd_sta *rxd = _rxd;
+
+	rxd->pkt_len = cpu_to_le16(len);
+	rxd->pkt_phys_addr = cpu_to_le32(addr);
+	wmb();
+	rxd->rx_ctrl = 0;
+}
+
+static int
+mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
+		       __le16 *qos, s8 *noise)
+{
+	struct mwl8k_rxd_sta *rxd = _rxd;
+	u16 rate_info;
+
+	if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
+		return -1;
+	rmb();
+
+	rate_info = le16_to_cpu(rxd->rate_info);
+
+	memset(status, 0, sizeof(*status));
+
+	status->signal = -rxd->rssi;
+	*noise = -rxd->noise_level;
+	status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
+	status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
+
+	if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
+		status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
+	if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
+		status->bw = RATE_INFO_BW_40;
+	if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
+		status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
+	if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
+		status->encoding = RX_ENC_HT;
+
+	if (rxd->channel > 14) {
+		status->band = NL80211_BAND_5GHZ;
+		if (!(status->encoding == RX_ENC_HT) &&
+		    status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
+			status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
+	} else {
+		status->band = NL80211_BAND_2GHZ;
+	}
+	status->freq = ieee80211_channel_to_frequency(rxd->channel,
+						      status->band);
+
+	*qos = rxd->qos_control;
+	if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
+	    (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
+		status->flag |= RX_FLAG_MMIC_ERROR;
+
+	return le16_to_cpu(rxd->pkt_len);
+}
+
+static struct rxd_ops rxd_sta_ops = {
+	.rxd_size	= sizeof(struct mwl8k_rxd_sta),
+	.rxd_init	= mwl8k_rxd_sta_init,
+	.rxd_refill	= mwl8k_rxd_sta_refill,
+	.rxd_process	= mwl8k_rxd_sta_process,
+};
+
+
+#define MWL8K_RX_DESCS		256
+#define MWL8K_RX_MAXSZ		3800
+
+static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_rx_queue *rxq = priv->rxq + index;
+	int size;
+	int i;
+
+	rxq->rxd_count = 0;
+	rxq->head = 0;
+	rxq->tail = 0;
+
+	size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
+
+	rxq->rxd = pci_zalloc_consistent(priv->pdev, size, &rxq->rxd_dma);
+	if (rxq->rxd == NULL) {
+		wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
+		return -ENOMEM;
+	}
+
+	rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
+	if (rxq->buf == NULL) {
+		pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < MWL8K_RX_DESCS; i++) {
+		int desc_size;
+		void *rxd;
+		int nexti;
+		dma_addr_t next_dma_addr;
+
+		desc_size = priv->rxd_ops->rxd_size;
+		rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
+
+		nexti = i + 1;
+		if (nexti == MWL8K_RX_DESCS)
+			nexti = 0;
+		next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
+
+		priv->rxd_ops->rxd_init(rxd, next_dma_addr);
+	}
+
+	return 0;
+}
+
+static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_rx_queue *rxq = priv->rxq + index;
+	int refilled;
+
+	refilled = 0;
+	while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
+		struct sk_buff *skb;
+		dma_addr_t addr;
+		int rx;
+		void *rxd;
+
+		skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
+		if (skb == NULL)
+			break;
+
+		addr = pci_map_single(priv->pdev, skb->data,
+				      MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
+
+		rxq->rxd_count++;
+		rx = rxq->tail++;
+		if (rxq->tail == MWL8K_RX_DESCS)
+			rxq->tail = 0;
+		rxq->buf[rx].skb = skb;
+		dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
+
+		rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
+		priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
+
+		refilled++;
+	}
+
+	return refilled;
+}
+
+/* Must be called only when the card's reception is completely halted */
+static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_rx_queue *rxq = priv->rxq + index;
+	int i;
+
+	if (rxq->rxd == NULL)
+		return;
+
+	for (i = 0; i < MWL8K_RX_DESCS; i++) {
+		if (rxq->buf[i].skb != NULL) {
+			pci_unmap_single(priv->pdev,
+					 dma_unmap_addr(&rxq->buf[i], dma),
+					 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
+			dma_unmap_addr_set(&rxq->buf[i], dma, 0);
+
+			kfree_skb(rxq->buf[i].skb);
+			rxq->buf[i].skb = NULL;
+		}
+	}
+
+	kfree(rxq->buf);
+	rxq->buf = NULL;
+
+	pci_free_consistent(priv->pdev,
+			    MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
+			    rxq->rxd, rxq->rxd_dma);
+	rxq->rxd = NULL;
+}
+
+
+/*
+ * Scan a list of BSSIDs to process for finalize join.
+ * Allows for extension to process multiple BSSIDs.
+ */
+static inline int
+mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
+{
+	return priv->capture_beacon &&
+		ieee80211_is_beacon(wh->frame_control) &&
+		ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
+}
+
+static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
+				     struct sk_buff *skb)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	priv->capture_beacon = false;
+	eth_zero_addr(priv->capture_bssid);
+
+	/*
+	 * Use GFP_ATOMIC as rxq_process is called from
+	 * the primary interrupt handler, memory allocation call
+	 * must not sleep.
+	 */
+	priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
+	if (priv->beacon_skb != NULL)
+		ieee80211_queue_work(hw, &priv->finalize_join_worker);
+}
+
+static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
+						   u8 *bssid)
+{
+	struct mwl8k_vif *mwl8k_vif;
+
+	list_for_each_entry(mwl8k_vif,
+			    vif_list, list) {
+		if (memcmp(bssid, mwl8k_vif->bssid,
+			   ETH_ALEN) == 0)
+			return mwl8k_vif;
+	}
+
+	return NULL;
+}
+
+static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mwl8k_vif = NULL;
+	struct mwl8k_rx_queue *rxq = priv->rxq + index;
+	int processed;
+
+	processed = 0;
+	while (rxq->rxd_count && limit--) {
+		struct sk_buff *skb;
+		void *rxd;
+		int pkt_len;
+		struct ieee80211_rx_status status;
+		struct ieee80211_hdr *wh;
+		__le16 qos;
+
+		skb = rxq->buf[rxq->head].skb;
+		if (skb == NULL)
+			break;
+
+		rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
+
+		pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
+							&priv->noise);
+		if (pkt_len < 0)
+			break;
+
+		rxq->buf[rxq->head].skb = NULL;
+
+		pci_unmap_single(priv->pdev,
+				 dma_unmap_addr(&rxq->buf[rxq->head], dma),
+				 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
+		dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
+
+		rxq->head++;
+		if (rxq->head == MWL8K_RX_DESCS)
+			rxq->head = 0;
+
+		rxq->rxd_count--;
+
+		wh = &((struct mwl8k_dma_data *)skb->data)->wh;
+
+		/*
+		 * Check for a pending join operation.  Save a
+		 * copy of the beacon and schedule a tasklet to
+		 * send a FINALIZE_JOIN command to the firmware.
+		 */
+		if (mwl8k_capture_bssid(priv, (void *)skb->data))
+			mwl8k_save_beacon(hw, skb);
+
+		if (ieee80211_has_protected(wh->frame_control)) {
+
+			/* Check if hw crypto has been enabled for
+			 * this bss. If yes, set the status flags
+			 * accordingly
+			 */
+			mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
+								wh->addr1);
+
+			if (mwl8k_vif != NULL &&
+			    mwl8k_vif->is_hw_crypto_enabled) {
+				/*
+				 * When MMIC ERROR is encountered
+				 * by the firmware, payload is
+				 * dropped and only 32 bytes of
+				 * mwl8k Firmware header is sent
+				 * to the host.
+				 *
+				 * We need to add four bytes of
+				 * key information.  In it
+				 * MAC80211 expects keyidx set to
+				 * 0 for triggering Counter
+				 * Measure of MMIC failure.
+				 */
+				if (status.flag & RX_FLAG_MMIC_ERROR) {
+					struct mwl8k_dma_data *tr;
+					tr = (struct mwl8k_dma_data *)skb->data;
+					memset((void *)&(tr->data), 0, 4);
+					pkt_len += 4;
+				}
+
+				if (!ieee80211_is_auth(wh->frame_control))
+					status.flag |= RX_FLAG_IV_STRIPPED |
+						       RX_FLAG_DECRYPTED |
+						       RX_FLAG_MMIC_STRIPPED;
+			}
+		}
+
+		skb_put(skb, pkt_len);
+		mwl8k_remove_dma_header(skb, qos);
+		memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
+		ieee80211_rx_irqsafe(hw, skb);
+
+		processed++;
+	}
+
+	return processed;
+}
+
+
+/*
+ * Packet transmission.
+ */
+
+#define MWL8K_TXD_STATUS_OK			0x00000001
+#define MWL8K_TXD_STATUS_OK_RETRY		0x00000002
+#define MWL8K_TXD_STATUS_OK_MORE_RETRY		0x00000004
+#define MWL8K_TXD_STATUS_MULTICAST_TX		0x00000008
+#define MWL8K_TXD_STATUS_FW_OWNED		0x80000000
+
+#define MWL8K_QOS_QLEN_UNSPEC			0xff00
+#define MWL8K_QOS_ACK_POLICY_MASK		0x0060
+#define MWL8K_QOS_ACK_POLICY_NORMAL		0x0000
+#define MWL8K_QOS_ACK_POLICY_BLOCKACK		0x0060
+#define MWL8K_QOS_EOSP				0x0010
+
+struct mwl8k_tx_desc {
+	__le32 status;
+	__u8 data_rate;
+	__u8 tx_priority;
+	__le16 qos_control;
+	__le32 pkt_phys_addr;
+	__le16 pkt_len;
+	__u8 dest_MAC_addr[ETH_ALEN];
+	__le32 next_txd_phys_addr;
+	__le32 timestamp;
+	__le16 rate_info;
+	__u8 peer_id;
+	__u8 tx_frag_cnt;
+} __packed;
+
+#define MWL8K_TX_DESCS		128
+
+static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_tx_queue *txq = priv->txq + index;
+	int size;
+	int i;
+
+	txq->len = 0;
+	txq->head = 0;
+	txq->tail = 0;
+
+	size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
+
+	txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma);
+	if (txq->txd == NULL) {
+		wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
+		return -ENOMEM;
+	}
+
+	txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
+	if (txq->skb == NULL) {
+		pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
+		txq->txd = NULL;
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < MWL8K_TX_DESCS; i++) {
+		struct mwl8k_tx_desc *tx_desc;
+		int nexti;
+
+		tx_desc = txq->txd + i;
+		nexti = (i + 1) % MWL8K_TX_DESCS;
+
+		tx_desc->status = 0;
+		tx_desc->next_txd_phys_addr =
+			cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
+	}
+
+	return 0;
+}
+
+static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
+{
+	iowrite32(MWL8K_H2A_INT_PPA_READY,
+		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+	iowrite32(MWL8K_H2A_INT_DUMMY,
+		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+	ioread32(priv->regs + MWL8K_HIU_INT_CODE);
+}
+
+static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int i;
+
+	for (i = 0; i < mwl8k_tx_queues(priv); i++) {
+		struct mwl8k_tx_queue *txq = priv->txq + i;
+		int fw_owned = 0;
+		int drv_owned = 0;
+		int unused = 0;
+		int desc;
+
+		for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
+			struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
+			u32 status;
+
+			status = le32_to_cpu(tx_desc->status);
+			if (status & MWL8K_TXD_STATUS_FW_OWNED)
+				fw_owned++;
+			else
+				drv_owned++;
+
+			if (tx_desc->pkt_len == 0)
+				unused++;
+		}
+
+		wiphy_err(hw->wiphy,
+			  "txq[%d] len=%d head=%d tail=%d "
+			  "fw_owned=%d drv_owned=%d unused=%d\n",
+			  i,
+			  txq->len, txq->head, txq->tail,
+			  fw_owned, drv_owned, unused);
+	}
+}
+
+/*
+ * Must be called with priv->fw_mutex held and tx queues stopped.
+ */
+#define MWL8K_TX_WAIT_TIMEOUT_MS	5000
+
+static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	DECLARE_COMPLETION_ONSTACK(tx_wait);
+	int retry;
+	int rc;
+
+	might_sleep();
+
+	/* Since fw restart is in progress, allow only the firmware
+	 * commands from the restart code and block the other
+	 * commands since they are going to fail in any case since
+	 * the firmware has crashed
+	 */
+	if (priv->hw_restart_in_progress) {
+		if (priv->hw_restart_owner == current)
+			return 0;
+		else
+			return -EBUSY;
+	}
+
+	if (atomic_read(&priv->watchdog_event_pending))
+		return 0;
+
+	/*
+	 * The TX queues are stopped at this point, so this test
+	 * doesn't need to take ->tx_lock.
+	 */
+	if (!priv->pending_tx_pkts)
+		return 0;
+
+	retry = 1;
+	rc = 0;
+
+	spin_lock_bh(&priv->tx_lock);
+	priv->tx_wait = &tx_wait;
+	while (!rc) {
+		int oldcount;
+		unsigned long timeout;
+
+		oldcount = priv->pending_tx_pkts;
+
+		spin_unlock_bh(&priv->tx_lock);
+		timeout = wait_for_completion_timeout(&tx_wait,
+			    msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
+
+		if (atomic_read(&priv->watchdog_event_pending)) {
+			spin_lock_bh(&priv->tx_lock);
+			priv->tx_wait = NULL;
+			spin_unlock_bh(&priv->tx_lock);
+			return 0;
+		}
+
+		spin_lock_bh(&priv->tx_lock);
+
+		if (timeout || !priv->pending_tx_pkts) {
+			WARN_ON(priv->pending_tx_pkts);
+			if (retry)
+				wiphy_notice(hw->wiphy, "tx rings drained\n");
+			break;
+		}
+
+		if (retry) {
+			mwl8k_tx_start(priv);
+			retry = 0;
+			continue;
+		}
+
+		if (priv->pending_tx_pkts < oldcount) {
+			wiphy_notice(hw->wiphy,
+				     "waiting for tx rings to drain (%d -> %d pkts)\n",
+				     oldcount, priv->pending_tx_pkts);
+			retry = 1;
+			continue;
+		}
+
+		priv->tx_wait = NULL;
+
+		wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
+			  MWL8K_TX_WAIT_TIMEOUT_MS);
+		mwl8k_dump_tx_rings(hw);
+		priv->hw_restart_in_progress = true;
+		ieee80211_queue_work(hw, &priv->fw_reload);
+
+		rc = -ETIMEDOUT;
+	}
+	priv->tx_wait = NULL;
+	spin_unlock_bh(&priv->tx_lock);
+
+	return rc;
+}
+
+#define MWL8K_TXD_SUCCESS(status)				\
+	((status) & (MWL8K_TXD_STATUS_OK |			\
+		     MWL8K_TXD_STATUS_OK_RETRY |		\
+		     MWL8K_TXD_STATUS_OK_MORE_RETRY))
+
+static int mwl8k_tid_queue_mapping(u8 tid)
+{
+	BUG_ON(tid > 7);
+
+	switch (tid) {
+	case 0:
+	case 3:
+		return IEEE80211_AC_BE;
+	case 1:
+	case 2:
+		return IEEE80211_AC_BK;
+	case 4:
+	case 5:
+		return IEEE80211_AC_VI;
+	case 6:
+	case 7:
+		return IEEE80211_AC_VO;
+	default:
+		return -1;
+	}
+}
+
+/* The firmware will fill in the rate information
+ * for each packet that gets queued in the hardware
+ * and these macros will interpret that info.
+ */
+
+#define RI_FORMAT(a)		  (a & 0x0001)
+#define RI_RATE_ID_MCS(a)	 ((a & 0x01f8) >> 3)
+
+static int
+mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_tx_queue *txq = priv->txq + index;
+	int processed;
+
+	processed = 0;
+	while (txq->len > 0 && limit--) {
+		int tx;
+		struct mwl8k_tx_desc *tx_desc;
+		unsigned long addr;
+		int size;
+		struct sk_buff *skb;
+		struct ieee80211_tx_info *info;
+		u32 status;
+		struct ieee80211_sta *sta;
+		struct mwl8k_sta *sta_info = NULL;
+		u16 rate_info;
+		struct ieee80211_hdr *wh;
+
+		tx = txq->head;
+		tx_desc = txq->txd + tx;
+
+		status = le32_to_cpu(tx_desc->status);
+
+		if (status & MWL8K_TXD_STATUS_FW_OWNED) {
+			if (!force)
+				break;
+			tx_desc->status &=
+				~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
+		}
+
+		txq->head = (tx + 1) % MWL8K_TX_DESCS;
+		BUG_ON(txq->len == 0);
+		txq->len--;
+		priv->pending_tx_pkts--;
+
+		addr = le32_to_cpu(tx_desc->pkt_phys_addr);
+		size = le16_to_cpu(tx_desc->pkt_len);
+		skb = txq->skb[tx];
+		txq->skb[tx] = NULL;
+
+		BUG_ON(skb == NULL);
+		pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
+
+		mwl8k_remove_dma_header(skb, tx_desc->qos_control);
+
+		wh = (struct ieee80211_hdr *) skb->data;
+
+		/* Mark descriptor as unused */
+		tx_desc->pkt_phys_addr = 0;
+		tx_desc->pkt_len = 0;
+
+		info = IEEE80211_SKB_CB(skb);
+		if (ieee80211_is_data(wh->frame_control)) {
+			rcu_read_lock();
+			sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
+							   wh->addr2);
+			if (sta) {
+				sta_info = MWL8K_STA(sta);
+				BUG_ON(sta_info == NULL);
+				rate_info = le16_to_cpu(tx_desc->rate_info);
+				/* If rate is < 6.5 Mpbs for an ht station
+				 * do not form an ampdu. If the station is a
+				 * legacy station (format = 0), do not form an
+				 * ampdu
+				 */
+				if (RI_RATE_ID_MCS(rate_info) < 1 ||
+				    RI_FORMAT(rate_info) == 0) {
+					sta_info->is_ampdu_allowed = false;
+				} else {
+					sta_info->is_ampdu_allowed = true;
+				}
+			}
+			rcu_read_unlock();
+		}
+
+		ieee80211_tx_info_clear_status(info);
+
+		/* Rate control is happening in the firmware.
+		 * Ensure no tx rate is being reported.
+		 */
+		info->status.rates[0].idx = -1;
+		info->status.rates[0].count = 1;
+
+		if (MWL8K_TXD_SUCCESS(status))
+			info->flags |= IEEE80211_TX_STAT_ACK;
+
+		ieee80211_tx_status_irqsafe(hw, skb);
+
+		processed++;
+	}
+
+	return processed;
+}
+
+/* must be called only when the card's transmit is completely halted */
+static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_tx_queue *txq = priv->txq + index;
+
+	if (txq->txd == NULL)
+		return;
+
+	mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
+
+	kfree(txq->skb);
+	txq->skb = NULL;
+
+	pci_free_consistent(priv->pdev,
+			    MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
+			    txq->txd, txq->txd_dma);
+	txq->txd = NULL;
+}
+
+/* caller must hold priv->stream_lock when calling the stream functions */
+static struct mwl8k_ampdu_stream *
+mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
+{
+	struct mwl8k_ampdu_stream *stream;
+	struct mwl8k_priv *priv = hw->priv;
+	int i;
+
+	for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
+		stream = &priv->ampdu[i];
+		if (stream->state == AMPDU_NO_STREAM) {
+			stream->sta = sta;
+			stream->state = AMPDU_STREAM_NEW;
+			stream->tid = tid;
+			stream->idx = i;
+			wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
+				    sta->addr, tid);
+			return stream;
+		}
+	}
+	return NULL;
+}
+
+static int
+mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
+{
+	int ret;
+
+	/* if the stream has already been started, don't start it again */
+	if (stream->state != AMPDU_STREAM_NEW)
+		return 0;
+	ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
+	if (ret)
+		wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
+			    "%d\n", stream->sta->addr, stream->tid, ret);
+	else
+		wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
+			    stream->sta->addr, stream->tid);
+	return ret;
+}
+
+static void
+mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
+{
+	wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
+		    stream->tid);
+	memset(stream, 0, sizeof(*stream));
+}
+
+static struct mwl8k_ampdu_stream *
+mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int i;
+
+	for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
+		struct mwl8k_ampdu_stream *stream;
+		stream = &priv->ampdu[i];
+		if (stream->state == AMPDU_NO_STREAM)
+			continue;
+		if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
+		    stream->tid == tid)
+			return stream;
+	}
+	return NULL;
+}
+
+#define MWL8K_AMPDU_PACKET_THRESHOLD 64
+static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
+{
+	struct mwl8k_sta *sta_info = MWL8K_STA(sta);
+	struct tx_traffic_info *tx_stats;
+
+	BUG_ON(tid >= MWL8K_MAX_TID);
+	tx_stats = &sta_info->tx_stats[tid];
+
+	return sta_info->is_ampdu_allowed &&
+		tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
+}
+
+static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
+{
+	struct mwl8k_sta *sta_info = MWL8K_STA(sta);
+	struct tx_traffic_info *tx_stats;
+
+	BUG_ON(tid >= MWL8K_MAX_TID);
+	tx_stats = &sta_info->tx_stats[tid];
+
+	if (tx_stats->start_time == 0)
+		tx_stats->start_time = jiffies;
+
+	/* reset the packet count after each second elapses.  If the number of
+	 * packets ever exceeds the ampdu_min_traffic threshold, we will allow
+	 * an ampdu stream to be started.
+	 */
+	if (jiffies - tx_stats->start_time > HZ) {
+		tx_stats->pkts = 0;
+		tx_stats->start_time = 0;
+	} else
+		tx_stats->pkts++;
+}
+
+/* The hardware ampdu queues start from 5.
+ * txpriorities for ampdu queues are
+ * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
+ * and queue 3 is lowest (queue 4 is reserved)
+ */
+#define BA_QUEUE		5
+
+static void
+mwl8k_txq_xmit(struct ieee80211_hw *hw,
+	       int index,
+	       struct ieee80211_sta *sta,
+	       struct sk_buff *skb)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct ieee80211_tx_info *tx_info;
+	struct mwl8k_vif *mwl8k_vif;
+	struct ieee80211_hdr *wh;
+	struct mwl8k_tx_queue *txq;
+	struct mwl8k_tx_desc *tx;
+	dma_addr_t dma;
+	u32 txstatus;
+	u8 txdatarate;
+	u16 qos;
+	int txpriority;
+	u8 tid = 0;
+	struct mwl8k_ampdu_stream *stream = NULL;
+	bool start_ba_session = false;
+	bool mgmtframe = false;
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
+	bool eapol_frame = false;
+
+	wh = (struct ieee80211_hdr *)skb->data;
+	if (ieee80211_is_data_qos(wh->frame_control))
+		qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
+	else
+		qos = 0;
+
+	if (skb->protocol == cpu_to_be16(ETH_P_PAE))
+		eapol_frame = true;
+
+	if (ieee80211_is_mgmt(wh->frame_control))
+		mgmtframe = true;
+
+	if (priv->ap_fw)
+		mwl8k_encapsulate_tx_frame(priv, skb);
+	else
+		mwl8k_add_dma_header(priv, skb, 0, 0);
+
+	wh = &((struct mwl8k_dma_data *)skb->data)->wh;
+
+	tx_info = IEEE80211_SKB_CB(skb);
+	mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
+
+	if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
+		wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
+		wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
+		mwl8k_vif->seqno += 0x10;
+	}
+
+	/* Setup firmware control bit fields for each frame type.  */
+	txstatus = 0;
+	txdatarate = 0;
+	if (ieee80211_is_mgmt(wh->frame_control) ||
+	    ieee80211_is_ctl(wh->frame_control)) {
+		txdatarate = 0;
+		qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
+	} else if (ieee80211_is_data(wh->frame_control)) {
+		txdatarate = 1;
+		if (is_multicast_ether_addr(wh->addr1))
+			txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
+
+		qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
+		if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
+			qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
+		else
+			qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
+	}
+
+	/* Queue ADDBA request in the respective data queue.  While setting up
+	 * the ampdu stream, mac80211 queues further packets for that
+	 * particular ra/tid pair.  However, packets piled up in the hardware
+	 * for that ra/tid pair will still go out. ADDBA request and the
+	 * related data packets going out from different queues asynchronously
+	 * will cause a shift in the receiver window which might result in
+	 * ampdu packets getting dropped at the receiver after the stream has
+	 * been setup.
+	 */
+	if (unlikely(ieee80211_is_action(wh->frame_control) &&
+	    mgmt->u.action.category == WLAN_CATEGORY_BACK &&
+	    mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
+	    priv->ap_fw)) {
+		u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
+		tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
+		index = mwl8k_tid_queue_mapping(tid);
+	}
+
+	txpriority = index;
+
+	if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
+	    ieee80211_is_data_qos(wh->frame_control)) {
+		tid = qos & 0xf;
+		mwl8k_tx_count_packet(sta, tid);
+		spin_lock(&priv->stream_lock);
+		stream = mwl8k_lookup_stream(hw, sta->addr, tid);
+		if (stream != NULL) {
+			if (stream->state == AMPDU_STREAM_ACTIVE) {
+				WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
+				txpriority = (BA_QUEUE + stream->idx) %
+					     TOTAL_HW_TX_QUEUES;
+				if (stream->idx <= 1)
+					index = stream->idx +
+						MWL8K_TX_WMM_QUEUES;
+
+			} else if (stream->state == AMPDU_STREAM_NEW) {
+				/* We get here if the driver sends us packets
+				 * after we've initiated a stream, but before
+				 * our ampdu_action routine has been called
+				 * with IEEE80211_AMPDU_TX_START to get the SSN
+				 * for the ADDBA request.  So this packet can
+				 * go out with no risk of sequence number
+				 * mismatch.  No special handling is required.
+				 */
+			} else {
+				/* Drop packets that would go out after the
+				 * ADDBA request was sent but before the ADDBA
+				 * response is received.  If we don't do this,
+				 * the recipient would probably receive it
+				 * after the ADDBA request with SSN 0.  This
+				 * will cause the recipient's BA receive window
+				 * to shift, which would cause the subsequent
+				 * packets in the BA stream to be discarded.
+				 * mac80211 queues our packets for us in this
+				 * case, so this is really just a safety check.
+				 */
+				wiphy_warn(hw->wiphy,
+					   "Cannot send packet while ADDBA "
+					   "dialog is underway.\n");
+				spin_unlock(&priv->stream_lock);
+				dev_kfree_skb(skb);
+				return;
+			}
+		} else {
+			/* Defer calling mwl8k_start_stream so that the current
+			 * skb can go out before the ADDBA request.  This
+			 * prevents sequence number mismatch at the recepient
+			 * as described above.
+			 */
+			if (mwl8k_ampdu_allowed(sta, tid)) {
+				stream = mwl8k_add_stream(hw, sta, tid);
+				if (stream != NULL)
+					start_ba_session = true;
+			}
+		}
+		spin_unlock(&priv->stream_lock);
+	} else {
+		qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
+		qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
+	}
+
+	dma = pci_map_single(priv->pdev, skb->data,
+				skb->len, PCI_DMA_TODEVICE);
+
+	if (pci_dma_mapping_error(priv->pdev, dma)) {
+		wiphy_debug(hw->wiphy,
+			    "failed to dma map skb, dropping TX frame.\n");
+		if (start_ba_session) {
+			spin_lock(&priv->stream_lock);
+			mwl8k_remove_stream(hw, stream);
+			spin_unlock(&priv->stream_lock);
+		}
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	spin_lock_bh(&priv->tx_lock);
+
+	txq = priv->txq + index;
+
+	/* Mgmt frames that go out frequently are probe
+	 * responses. Other mgmt frames got out relatively
+	 * infrequently. Hence reserve 2 buffers so that
+	 * other mgmt frames do not get dropped due to an
+	 * already queued probe response in one of the
+	 * reserved buffers.
+	 */
+
+	if (txq->len >= MWL8K_TX_DESCS - 2) {
+		if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
+			if (start_ba_session) {
+				spin_lock(&priv->stream_lock);
+				mwl8k_remove_stream(hw, stream);
+				spin_unlock(&priv->stream_lock);
+			}
+			mwl8k_tx_start(priv);
+			spin_unlock_bh(&priv->tx_lock);
+			pci_unmap_single(priv->pdev, dma, skb->len,
+					 PCI_DMA_TODEVICE);
+			dev_kfree_skb(skb);
+			return;
+		}
+	}
+
+	BUG_ON(txq->skb[txq->tail] != NULL);
+	txq->skb[txq->tail] = skb;
+
+	tx = txq->txd + txq->tail;
+	tx->data_rate = txdatarate;
+	tx->tx_priority = txpriority;
+	tx->qos_control = cpu_to_le16(qos);
+	tx->pkt_phys_addr = cpu_to_le32(dma);
+	tx->pkt_len = cpu_to_le16(skb->len);
+	tx->rate_info = 0;
+	if (!priv->ap_fw && sta != NULL)
+		tx->peer_id = MWL8K_STA(sta)->peer_id;
+	else
+		tx->peer_id = 0;
+
+	if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
+		tx->timestamp = cpu_to_le32(ioread32(priv->regs +
+						MWL8K_HW_TIMER_REGISTER));
+	else
+		tx->timestamp = 0;
+
+	wmb();
+	tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
+
+	txq->len++;
+	priv->pending_tx_pkts++;
+
+	txq->tail++;
+	if (txq->tail == MWL8K_TX_DESCS)
+		txq->tail = 0;
+
+	mwl8k_tx_start(priv);
+
+	spin_unlock_bh(&priv->tx_lock);
+
+	/* Initiate the ampdu session here */
+	if (start_ba_session) {
+		spin_lock(&priv->stream_lock);
+		if (mwl8k_start_stream(hw, stream))
+			mwl8k_remove_stream(hw, stream);
+		spin_unlock(&priv->stream_lock);
+	}
+}
+
+
+/*
+ * Firmware access.
+ *
+ * We have the following requirements for issuing firmware commands:
+ * - Some commands require that the packet transmit path is idle when
+ *   the command is issued.  (For simplicity, we'll just quiesce the
+ *   transmit path for every command.)
+ * - There are certain sequences of commands that need to be issued to
+ *   the hardware sequentially, with no other intervening commands.
+ *
+ * This leads to an implementation of a "firmware lock" as a mutex that
+ * can be taken recursively, and which is taken by both the low-level
+ * command submission function (mwl8k_post_cmd) as well as any users of
+ * that function that require issuing of an atomic sequence of commands,
+ * and quiesces the transmit path whenever it's taken.
+ */
+static int mwl8k_fw_lock(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	if (priv->fw_mutex_owner != current) {
+		int rc;
+
+		mutex_lock(&priv->fw_mutex);
+		ieee80211_stop_queues(hw);
+
+		rc = mwl8k_tx_wait_empty(hw);
+		if (rc) {
+			if (!priv->hw_restart_in_progress)
+				ieee80211_wake_queues(hw);
+
+			mutex_unlock(&priv->fw_mutex);
+
+			return rc;
+		}
+
+		priv->fw_mutex_owner = current;
+	}
+
+	priv->fw_mutex_depth++;
+
+	return 0;
+}
+
+static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	if (!--priv->fw_mutex_depth) {
+		if (!priv->hw_restart_in_progress)
+			ieee80211_wake_queues(hw);
+
+		priv->fw_mutex_owner = NULL;
+		mutex_unlock(&priv->fw_mutex);
+	}
+}
+
+static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
+			       u32 bitmap);
+
+/*
+ * Command processing.
+ */
+
+/* Timeout firmware commands after 10s */
+#define MWL8K_CMD_TIMEOUT_MS	10000
+
+static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
+{
+	DECLARE_COMPLETION_ONSTACK(cmd_wait);
+	struct mwl8k_priv *priv = hw->priv;
+	void __iomem *regs = priv->regs;
+	dma_addr_t dma_addr;
+	unsigned int dma_size;
+	int rc;
+	unsigned long timeout = 0;
+	u8 buf[32];
+	u32 bitmap = 0;
+
+	wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
+		  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
+
+	/* Before posting firmware commands that could change the hardware
+	 * characteristics, make sure that all BSSes are stopped temporary.
+	 * Enable these stopped BSSes after completion of the commands
+	 */
+
+	rc = mwl8k_fw_lock(hw);
+	if (rc)
+		return rc;
+
+	if (priv->ap_fw && priv->running_bsses) {
+		switch (le16_to_cpu(cmd->code)) {
+		case MWL8K_CMD_SET_RF_CHANNEL:
+		case MWL8K_CMD_RADIO_CONTROL:
+		case MWL8K_CMD_RF_TX_POWER:
+		case MWL8K_CMD_TX_POWER:
+		case MWL8K_CMD_RF_ANTENNA:
+		case MWL8K_CMD_RTS_THRESHOLD:
+		case MWL8K_CMD_MIMO_CONFIG:
+			bitmap = priv->running_bsses;
+			mwl8k_enable_bsses(hw, false, bitmap);
+			break;
+		}
+	}
+
+	cmd->result = (__force __le16) 0xffff;
+	dma_size = le16_to_cpu(cmd->length);
+	dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
+				  PCI_DMA_BIDIRECTIONAL);
+	if (pci_dma_mapping_error(priv->pdev, dma_addr)) {
+		rc = -ENOMEM;
+		goto exit;
+	}
+
+	priv->hostcmd_wait = &cmd_wait;
+	iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
+	iowrite32(MWL8K_H2A_INT_DOORBELL,
+		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+	iowrite32(MWL8K_H2A_INT_DUMMY,
+		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
+
+	timeout = wait_for_completion_timeout(&cmd_wait,
+				msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
+
+	priv->hostcmd_wait = NULL;
+
+
+	pci_unmap_single(priv->pdev, dma_addr, dma_size,
+					PCI_DMA_BIDIRECTIONAL);
+
+	if (!timeout) {
+		wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
+			  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
+			  MWL8K_CMD_TIMEOUT_MS);
+		rc = -ETIMEDOUT;
+	} else {
+		int ms;
+
+		ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
+
+		rc = cmd->result ? -EINVAL : 0;
+		if (rc)
+			wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
+				  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
+				  le16_to_cpu(cmd->result));
+		else if (ms > 2000)
+			wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
+				     mwl8k_cmd_name(cmd->code,
+						    buf, sizeof(buf)),
+				     ms);
+	}
+
+exit:
+	if (bitmap)
+		mwl8k_enable_bsses(hw, true, bitmap);
+
+	mwl8k_fw_unlock(hw);
+
+	return rc;
+}
+
+static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif,
+				 struct mwl8k_cmd_pkt *cmd)
+{
+	if (vif != NULL)
+		cmd->macid = MWL8K_VIF(vif)->macid;
+	return mwl8k_post_cmd(hw, cmd);
+}
+
+/*
+ * Setup code shared between STA and AP firmware images.
+ */
+static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
+	memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
+
+	BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
+	memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
+
+	priv->band_24.band = NL80211_BAND_2GHZ;
+	priv->band_24.channels = priv->channels_24;
+	priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
+	priv->band_24.bitrates = priv->rates_24;
+	priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
+
+	hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
+}
+
+static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
+	memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
+
+	BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
+	memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
+
+	priv->band_50.band = NL80211_BAND_5GHZ;
+	priv->band_50.channels = priv->channels_50;
+	priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
+	priv->band_50.bitrates = priv->rates_50;
+	priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
+
+	hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
+}
+
+/*
+ * CMD_GET_HW_SPEC (STA version).
+ */
+struct mwl8k_cmd_get_hw_spec_sta {
+	struct mwl8k_cmd_pkt header;
+	__u8 hw_rev;
+	__u8 host_interface;
+	__le16 num_mcaddrs;
+	__u8 perm_addr[ETH_ALEN];
+	__le16 region_code;
+	__le32 fw_rev;
+	__le32 ps_cookie;
+	__le32 caps;
+	__u8 mcs_bitmap[16];
+	__le32 rx_queue_ptr;
+	__le32 num_tx_queues;
+	__le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
+	__le32 caps2;
+	__le32 num_tx_desc_per_queue;
+	__le32 total_rxd;
+} __packed;
+
+#define MWL8K_CAP_MAX_AMSDU		0x20000000
+#define MWL8K_CAP_GREENFIELD		0x08000000
+#define MWL8K_CAP_AMPDU			0x04000000
+#define MWL8K_CAP_RX_STBC		0x01000000
+#define MWL8K_CAP_TX_STBC		0x00800000
+#define MWL8K_CAP_SHORTGI_40MHZ		0x00400000
+#define MWL8K_CAP_SHORTGI_20MHZ		0x00200000
+#define MWL8K_CAP_RX_ANTENNA_MASK	0x000e0000
+#define MWL8K_CAP_TX_ANTENNA_MASK	0x0001c000
+#define MWL8K_CAP_DELAY_BA		0x00003000
+#define MWL8K_CAP_MIMO			0x00000200
+#define MWL8K_CAP_40MHZ			0x00000100
+#define MWL8K_CAP_BAND_MASK		0x00000007
+#define MWL8K_CAP_5GHZ			0x00000004
+#define MWL8K_CAP_2GHZ4			0x00000001
+
+static void
+mwl8k_set_ht_caps(struct ieee80211_hw *hw,
+		  struct ieee80211_supported_band *band, u32 cap)
+{
+	int rx_streams;
+	int tx_streams;
+
+	band->ht_cap.ht_supported = 1;
+
+	if (cap & MWL8K_CAP_MAX_AMSDU)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
+	if (cap & MWL8K_CAP_GREENFIELD)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
+	if (cap & MWL8K_CAP_AMPDU) {
+		ieee80211_hw_set(hw, AMPDU_AGGREGATION);
+		band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
+		band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
+	}
+	if (cap & MWL8K_CAP_RX_STBC)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
+	if (cap & MWL8K_CAP_TX_STBC)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
+	if (cap & MWL8K_CAP_SHORTGI_40MHZ)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
+	if (cap & MWL8K_CAP_SHORTGI_20MHZ)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
+	if (cap & MWL8K_CAP_DELAY_BA)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
+	if (cap & MWL8K_CAP_40MHZ)
+		band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+
+	rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
+	tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
+
+	band->ht_cap.mcs.rx_mask[0] = 0xff;
+	if (rx_streams >= 2)
+		band->ht_cap.mcs.rx_mask[1] = 0xff;
+	if (rx_streams >= 3)
+		band->ht_cap.mcs.rx_mask[2] = 0xff;
+	band->ht_cap.mcs.rx_mask[4] = 0x01;
+	band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
+
+	if (rx_streams != tx_streams) {
+		band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
+		band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
+				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
+	}
+}
+
+static void
+mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	if (priv->caps)
+		return;
+
+	if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
+		mwl8k_setup_2ghz_band(hw);
+		if (caps & MWL8K_CAP_MIMO)
+			mwl8k_set_ht_caps(hw, &priv->band_24, caps);
+	}
+
+	if (caps & MWL8K_CAP_5GHZ) {
+		mwl8k_setup_5ghz_band(hw);
+		if (caps & MWL8K_CAP_MIMO)
+			mwl8k_set_ht_caps(hw, &priv->band_50, caps);
+	}
+
+	priv->caps = caps;
+}
+
+static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_get_hw_spec_sta *cmd;
+	int rc;
+	int i;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
+	cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
+	cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
+	cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
+	cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
+	cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+
+	if (!rc) {
+		SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
+		priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
+		priv->fw_rev = le32_to_cpu(cmd->fw_rev);
+		priv->hw_rev = cmd->hw_rev;
+		mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
+		priv->ap_macids_supported = 0x00000000;
+		priv->sta_macids_supported = 0x00000001;
+	}
+
+	kfree(cmd);
+	return rc;
+}
+
+/*
+ * CMD_GET_HW_SPEC (AP version).
+ */
+struct mwl8k_cmd_get_hw_spec_ap {
+	struct mwl8k_cmd_pkt header;
+	__u8 hw_rev;
+	__u8 host_interface;
+	__le16 num_wcb;
+	__le16 num_mcaddrs;
+	__u8 perm_addr[ETH_ALEN];
+	__le16 region_code;
+	__le16 num_antenna;
+	__le32 fw_rev;
+	__le32 wcbbase0;
+	__le32 rxwrptr;
+	__le32 rxrdptr;
+	__le32 ps_cookie;
+	__le32 wcbbase1;
+	__le32 wcbbase2;
+	__le32 wcbbase3;
+	__le32 fw_api_version;
+	__le32 caps;
+	__le32 num_of_ampdu_queues;
+	__le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
+} __packed;
+
+static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_get_hw_spec_ap *cmd;
+	int rc, i;
+	u32 api_version;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
+	cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+
+	if (!rc) {
+		int off;
+
+		api_version = le32_to_cpu(cmd->fw_api_version);
+		if (priv->device_info->fw_api_ap != api_version) {
+			printk(KERN_ERR "%s: Unsupported fw API version for %s."
+			       "  Expected %d got %d.\n", MWL8K_NAME,
+			       priv->device_info->part_name,
+			       priv->device_info->fw_api_ap,
+			       api_version);
+			rc = -EINVAL;
+			goto done;
+		}
+		SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
+		priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
+		priv->fw_rev = le32_to_cpu(cmd->fw_rev);
+		priv->hw_rev = cmd->hw_rev;
+		mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
+		priv->ap_macids_supported = 0x000000ff;
+		priv->sta_macids_supported = 0x00000100;
+		priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
+		if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
+			wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
+				   " but we only support %d.\n",
+				   priv->num_ampdu_queues,
+				   MWL8K_MAX_AMPDU_QUEUES);
+			priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
+		}
+		off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
+		iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
+
+		off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
+		iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
+
+		priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
+		priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
+		priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
+		priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
+
+		for (i = 0; i < priv->num_ampdu_queues; i++)
+			priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
+				le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
+	}
+
+done:
+	kfree(cmd);
+	return rc;
+}
+
+/*
+ * CMD_SET_HW_SPEC.
+ */
+struct mwl8k_cmd_set_hw_spec {
+	struct mwl8k_cmd_pkt header;
+	__u8 hw_rev;
+	__u8 host_interface;
+	__le16 num_mcaddrs;
+	__u8 perm_addr[ETH_ALEN];
+	__le16 region_code;
+	__le32 fw_rev;
+	__le32 ps_cookie;
+	__le32 caps;
+	__le32 rx_queue_ptr;
+	__le32 num_tx_queues;
+	__le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
+	__le32 flags;
+	__le32 num_tx_desc_per_queue;
+	__le32 total_rxd;
+} __packed;
+
+/* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
+ * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
+ * the packets that are queued for more than 500ms, will be dropped in the
+ * hardware. This helps minimizing the issues caused due to head-of-line
+ * blocking where a slow client can hog the bandwidth and affect traffic to a
+ * faster client.
+ */
+#define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY	0x00000400
+#define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR	0x00000200
+#define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT		0x00000080
+#define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP	0x00000020
+#define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON		0x00000010
+
+static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_set_hw_spec *cmd;
+	int rc;
+	int i;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
+	cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
+	cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
+
+	/*
+	 * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
+	 * that order. Firmware has Q3 as highest priority and Q0 as lowest
+	 * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
+	 * priority is interpreted the right way in firmware.
+	 */
+	for (i = 0; i < mwl8k_tx_queues(priv); i++) {
+		int j = mwl8k_tx_queues(priv) - 1 - i;
+		cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
+	}
+
+	cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
+				 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
+				 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
+				 MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
+				 MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
+	cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
+	cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_MAC_MULTICAST_ADR.
+ */
+struct mwl8k_cmd_mac_multicast_adr {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 numaddr;
+	__u8 addr[][ETH_ALEN];
+};
+
+#define MWL8K_ENABLE_RX_DIRECTED	0x0001
+#define MWL8K_ENABLE_RX_MULTICAST	0x0002
+#define MWL8K_ENABLE_RX_ALL_MULTICAST	0x0004
+#define MWL8K_ENABLE_RX_BROADCAST	0x0008
+
+static struct mwl8k_cmd_pkt *
+__mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
+			      struct netdev_hw_addr_list *mc_list)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_mac_multicast_adr *cmd;
+	int size;
+	int mc_count = 0;
+
+	if (mc_list)
+		mc_count = netdev_hw_addr_list_count(mc_list);
+
+	if (allmulti || mc_count > priv->num_mcaddrs) {
+		allmulti = 1;
+		mc_count = 0;
+	}
+
+	size = sizeof(*cmd) + mc_count * ETH_ALEN;
+
+	cmd = kzalloc(size, GFP_ATOMIC);
+	if (cmd == NULL)
+		return NULL;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
+	cmd->header.length = cpu_to_le16(size);
+	cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
+				  MWL8K_ENABLE_RX_BROADCAST);
+
+	if (allmulti) {
+		cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
+	} else if (mc_count) {
+		struct netdev_hw_addr *ha;
+		int i = 0;
+
+		cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
+		cmd->numaddr = cpu_to_le16(mc_count);
+		netdev_hw_addr_list_for_each(ha, mc_list) {
+			memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
+		}
+	}
+
+	return &cmd->header;
+}
+
+/*
+ * CMD_GET_STAT.
+ */
+struct mwl8k_cmd_get_stat {
+	struct mwl8k_cmd_pkt header;
+	__le32 stats[64];
+} __packed;
+
+#define MWL8K_STAT_ACK_FAILURE	9
+#define MWL8K_STAT_RTS_FAILURE	12
+#define MWL8K_STAT_FCS_ERROR	24
+#define MWL8K_STAT_RTS_SUCCESS	11
+
+static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
+			      struct ieee80211_low_level_stats *stats)
+{
+	struct mwl8k_cmd_get_stat *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	if (!rc) {
+		stats->dot11ACKFailureCount =
+			le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
+		stats->dot11RTSFailureCount =
+			le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
+		stats->dot11FCSErrorCount =
+			le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
+		stats->dot11RTSSuccessCount =
+			le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
+	}
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_RADIO_CONTROL.
+ */
+struct mwl8k_cmd_radio_control {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 control;
+	__le16 radio_on;
+} __packed;
+
+static int
+mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_radio_control *cmd;
+	int rc;
+
+	if (enable == priv->radio_on && !force)
+		return 0;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
+	cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
+	cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	if (!rc)
+		priv->radio_on = enable;
+
+	return rc;
+}
+
+static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
+{
+	return mwl8k_cmd_radio_control(hw, 0, 0);
+}
+
+static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
+{
+	return mwl8k_cmd_radio_control(hw, 1, 0);
+}
+
+static int
+mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	priv->radio_short_preamble = short_preamble;
+
+	return mwl8k_cmd_radio_control(hw, 1, 1);
+}
+
+/*
+ * CMD_RF_TX_POWER.
+ */
+#define MWL8K_RF_TX_POWER_LEVEL_TOTAL	8
+
+struct mwl8k_cmd_rf_tx_power {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 support_level;
+	__le16 current_level;
+	__le16 reserved;
+	__le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
+} __packed;
+
+static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
+{
+	struct mwl8k_cmd_rf_tx_power *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
+	cmd->support_level = cpu_to_le16(dBm);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_TX_POWER.
+ */
+#define MWL8K_TX_POWER_LEVEL_TOTAL      12
+
+struct mwl8k_cmd_tx_power {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 band;
+	__le16 channel;
+	__le16 bw;
+	__le16 sub_ch;
+	__le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
+} __packed;
+
+static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
+				     struct ieee80211_conf *conf,
+				     unsigned short pwr)
+{
+	struct ieee80211_channel *channel = conf->chandef.chan;
+	enum nl80211_channel_type channel_type =
+		cfg80211_get_chandef_type(&conf->chandef);
+	struct mwl8k_cmd_tx_power *cmd;
+	int rc;
+	int i;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
+
+	if (channel->band == NL80211_BAND_2GHZ)
+		cmd->band = cpu_to_le16(0x1);
+	else if (channel->band == NL80211_BAND_5GHZ)
+		cmd->band = cpu_to_le16(0x4);
+
+	cmd->channel = cpu_to_le16(channel->hw_value);
+
+	if (channel_type == NL80211_CHAN_NO_HT ||
+	    channel_type == NL80211_CHAN_HT20) {
+		cmd->bw = cpu_to_le16(0x2);
+	} else {
+		cmd->bw = cpu_to_le16(0x4);
+		if (channel_type == NL80211_CHAN_HT40MINUS)
+			cmd->sub_ch = cpu_to_le16(0x3);
+		else if (channel_type == NL80211_CHAN_HT40PLUS)
+			cmd->sub_ch = cpu_to_le16(0x1);
+	}
+
+	for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
+		cmd->power_level_list[i] = cpu_to_le16(pwr);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_RF_ANTENNA.
+ */
+struct mwl8k_cmd_rf_antenna {
+	struct mwl8k_cmd_pkt header;
+	__le16 antenna;
+	__le16 mode;
+} __packed;
+
+#define MWL8K_RF_ANTENNA_RX		1
+#define MWL8K_RF_ANTENNA_TX		2
+
+static int
+mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
+{
+	struct mwl8k_cmd_rf_antenna *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->antenna = cpu_to_le16(antenna);
+	cmd->mode = cpu_to_le16(mask);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_BEACON.
+ */
+struct mwl8k_cmd_set_beacon {
+	struct mwl8k_cmd_pkt header;
+	__le16 beacon_len;
+	__u8 beacon[];
+};
+
+static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
+				struct ieee80211_vif *vif, u8 *beacon, int len)
+{
+	struct mwl8k_cmd_set_beacon *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
+	cmd->beacon_len = cpu_to_le16(len);
+	memcpy(cmd->beacon, beacon, len);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_PRE_SCAN.
+ */
+struct mwl8k_cmd_set_pre_scan {
+	struct mwl8k_cmd_pkt header;
+} __packed;
+
+static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
+{
+	struct mwl8k_cmd_set_pre_scan *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_BBP_REG_ACCESS.
+ */
+struct mwl8k_cmd_bbp_reg_access {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 offset;
+	u8 value;
+	u8 rsrv[3];
+} __packed;
+
+static int
+mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
+			 u16 action,
+			 u16 offset,
+			 u8 *value)
+{
+	struct mwl8k_cmd_bbp_reg_access *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(action);
+	cmd->offset = cpu_to_le16(offset);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+
+	if (!rc)
+		*value = cmd->value;
+	else
+		*value = 0;
+
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_POST_SCAN.
+ */
+struct mwl8k_cmd_set_post_scan {
+	struct mwl8k_cmd_pkt header;
+	__le32 isibss;
+	__u8 bssid[ETH_ALEN];
+} __packed;
+
+static int
+mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
+{
+	struct mwl8k_cmd_set_post_scan *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->isibss = 0;
+	memcpy(cmd->bssid, mac, ETH_ALEN);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+static int freq_to_idx(struct mwl8k_priv *priv, int freq)
+{
+	struct ieee80211_supported_band *sband;
+	int band, ch, idx = 0;
+
+	for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
+		sband = priv->hw->wiphy->bands[band];
+		if (!sband)
+			continue;
+
+		for (ch = 0; ch < sband->n_channels; ch++, idx++)
+			if (sband->channels[ch].center_freq == freq)
+				goto exit;
+	}
+
+exit:
+	return idx;
+}
+
+static void mwl8k_update_survey(struct mwl8k_priv *priv,
+				struct ieee80211_channel *channel)
+{
+	u32 cca_cnt, rx_rdy;
+	s8 nf = 0, idx;
+	struct survey_info *survey;
+
+	idx = freq_to_idx(priv, priv->acs_chan->center_freq);
+	if (idx >= MWL8K_NUM_CHANS) {
+		wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
+		return;
+	}
+
+	survey = &priv->survey[idx];
+
+	cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
+	cca_cnt /= 1000; /* uSecs to mSecs */
+	survey->time_busy = (u64) cca_cnt;
+
+	rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
+	rx_rdy /= 1000; /* uSecs to mSecs */
+	survey->time_rx = (u64) rx_rdy;
+
+	priv->channel_time = jiffies - priv->channel_time;
+	survey->time = jiffies_to_msecs(priv->channel_time);
+
+	survey->channel = channel;
+
+	mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
+
+	/* Make sure sign is negative else ACS  at hostapd fails */
+	survey->noise = nf * -1;
+
+	survey->filled = SURVEY_INFO_NOISE_DBM |
+			 SURVEY_INFO_TIME |
+			 SURVEY_INFO_TIME_BUSY |
+			 SURVEY_INFO_TIME_RX;
+}
+
+/*
+ * CMD_SET_RF_CHANNEL.
+ */
+struct mwl8k_cmd_set_rf_channel {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__u8 current_channel;
+	__le32 channel_flags;
+} __packed;
+
+static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
+				    struct ieee80211_conf *conf)
+{
+	struct ieee80211_channel *channel = conf->chandef.chan;
+	enum nl80211_channel_type channel_type =
+		cfg80211_get_chandef_type(&conf->chandef);
+	struct mwl8k_cmd_set_rf_channel *cmd;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
+	cmd->current_channel = channel->hw_value;
+
+	if (channel->band == NL80211_BAND_2GHZ)
+		cmd->channel_flags |= cpu_to_le32(0x00000001);
+	else if (channel->band == NL80211_BAND_5GHZ)
+		cmd->channel_flags |= cpu_to_le32(0x00000004);
+
+	if (!priv->sw_scan_start) {
+		if (channel_type == NL80211_CHAN_NO_HT ||
+		    channel_type == NL80211_CHAN_HT20)
+			cmd->channel_flags |= cpu_to_le32(0x00000080);
+		else if (channel_type == NL80211_CHAN_HT40MINUS)
+			cmd->channel_flags |= cpu_to_le32(0x000001900);
+		else if (channel_type == NL80211_CHAN_HT40PLUS)
+			cmd->channel_flags |= cpu_to_le32(0x000000900);
+	} else {
+		cmd->channel_flags |= cpu_to_le32(0x00000080);
+	}
+
+	if (priv->sw_scan_start) {
+		/* Store current channel stats
+		 * before switching to newer one.
+		 * This will be processed only for AP fw.
+		 */
+		if (priv->channel_time != 0)
+			mwl8k_update_survey(priv, priv->acs_chan);
+
+		priv->channel_time = jiffies;
+		priv->acs_chan =  channel;
+	}
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_AID.
+ */
+#define MWL8K_FRAME_PROT_DISABLED			0x00
+#define MWL8K_FRAME_PROT_11G				0x07
+#define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY		0x02
+#define MWL8K_FRAME_PROT_11N_HT_ALL			0x06
+
+struct mwl8k_cmd_update_set_aid {
+	struct	mwl8k_cmd_pkt header;
+	__le16	aid;
+
+	 /* AP's MAC address (BSSID) */
+	__u8	bssid[ETH_ALEN];
+	__le16	protection_mode;
+	__u8	supp_rates[14];
+} __packed;
+
+static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
+{
+	int i;
+	int j;
+
+	/*
+	 * Clear nonstandard rate 4.
+	 */
+	mask &= 0x1fef;
+
+	for (i = 0, j = 0; i < 13; i++) {
+		if (mask & (1 << i))
+			rates[j++] = mwl8k_rates_24[i].hw_value;
+	}
+}
+
+static int
+mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
+		  struct ieee80211_vif *vif, u32 legacy_rate_mask)
+{
+	struct mwl8k_cmd_update_set_aid *cmd;
+	u16 prot_mode;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->aid = cpu_to_le16(vif->bss_conf.aid);
+	memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
+
+	if (vif->bss_conf.use_cts_prot) {
+		prot_mode = MWL8K_FRAME_PROT_11G;
+	} else {
+		switch (vif->bss_conf.ht_operation_mode &
+			IEEE80211_HT_OP_MODE_PROTECTION) {
+		case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
+			prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
+			break;
+		case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
+			prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
+			break;
+		default:
+			prot_mode = MWL8K_FRAME_PROT_DISABLED;
+			break;
+		}
+	}
+	cmd->protection_mode = cpu_to_le16(prot_mode);
+
+	legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_RATE.
+ */
+struct mwl8k_cmd_set_rate {
+	struct	mwl8k_cmd_pkt header;
+	__u8	legacy_rates[14];
+
+	/* Bitmap for supported MCS codes.  */
+	__u8	mcs_set[16];
+	__u8	reserved[16];
+} __packed;
+
+static int
+mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   u32 legacy_rate_mask, u8 *mcs_rates)
+{
+	struct mwl8k_cmd_set_rate *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
+	memcpy(cmd->mcs_set, mcs_rates, 16);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_FINALIZE_JOIN.
+ */
+#define MWL8K_FJ_BEACON_MAXLEN	128
+
+struct mwl8k_cmd_finalize_join {
+	struct mwl8k_cmd_pkt header;
+	__le32 sleep_interval;	/* Number of beacon periods to sleep */
+	__u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
+} __packed;
+
+static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
+				   int framelen, int dtim)
+{
+	struct mwl8k_cmd_finalize_join *cmd;
+	struct ieee80211_mgmt *payload = frame;
+	int payload_len;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
+
+	payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
+	if (payload_len < 0)
+		payload_len = 0;
+	else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
+		payload_len = MWL8K_FJ_BEACON_MAXLEN;
+
+	memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_RTS_THRESHOLD.
+ */
+struct mwl8k_cmd_set_rts_threshold {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 threshold;
+} __packed;
+
+static int
+mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
+{
+	struct mwl8k_cmd_set_rts_threshold *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
+	cmd->threshold = cpu_to_le16(rts_thresh);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_SLOT.
+ */
+struct mwl8k_cmd_set_slot {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__u8 short_slot;
+} __packed;
+
+static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
+{
+	struct mwl8k_cmd_set_slot *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
+	cmd->short_slot = short_slot_time;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_EDCA_PARAMS.
+ */
+struct mwl8k_cmd_set_edca_params {
+	struct mwl8k_cmd_pkt header;
+
+	/* See MWL8K_SET_EDCA_XXX below */
+	__le16 action;
+
+	/* TX opportunity in units of 32 us */
+	__le16 txop;
+
+	union {
+		struct {
+			/* Log exponent of max contention period: 0...15 */
+			__le32 log_cw_max;
+
+			/* Log exponent of min contention period: 0...15 */
+			__le32 log_cw_min;
+
+			/* Adaptive interframe spacing in units of 32us */
+			__u8 aifs;
+
+			/* TX queue to configure */
+			__u8 txq;
+		} ap;
+		struct {
+			/* Log exponent of max contention period: 0...15 */
+			__u8 log_cw_max;
+
+			/* Log exponent of min contention period: 0...15 */
+			__u8 log_cw_min;
+
+			/* Adaptive interframe spacing in units of 32us */
+			__u8 aifs;
+
+			/* TX queue to configure */
+			__u8 txq;
+		} sta;
+	};
+} __packed;
+
+#define MWL8K_SET_EDCA_CW	0x01
+#define MWL8K_SET_EDCA_TXOP	0x02
+#define MWL8K_SET_EDCA_AIFS	0x04
+
+#define MWL8K_SET_EDCA_ALL	(MWL8K_SET_EDCA_CW | \
+				 MWL8K_SET_EDCA_TXOP | \
+				 MWL8K_SET_EDCA_AIFS)
+
+static int
+mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
+			  __u16 cw_min, __u16 cw_max,
+			  __u8 aifs, __u16 txop)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_set_edca_params *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
+	cmd->txop = cpu_to_le16(txop);
+	if (priv->ap_fw) {
+		cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
+		cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
+		cmd->ap.aifs = aifs;
+		cmd->ap.txq = qnum;
+	} else {
+		cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
+		cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
+		cmd->sta.aifs = aifs;
+		cmd->sta.txq = qnum;
+	}
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_WMM_MODE.
+ */
+struct mwl8k_cmd_set_wmm_mode {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+} __packed;
+
+static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_set_wmm_mode *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(!!enable);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	if (!rc)
+		priv->wmm_enabled = enable;
+
+	return rc;
+}
+
+/*
+ * CMD_MIMO_CONFIG.
+ */
+struct mwl8k_cmd_mimo_config {
+	struct mwl8k_cmd_pkt header;
+	__le32 action;
+	__u8 rx_antenna_map;
+	__u8 tx_antenna_map;
+} __packed;
+
+static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
+{
+	struct mwl8k_cmd_mimo_config *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
+	cmd->rx_antenna_map = rx;
+	cmd->tx_antenna_map = tx;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_USE_FIXED_RATE (STA version).
+ */
+struct mwl8k_cmd_use_fixed_rate_sta {
+	struct mwl8k_cmd_pkt header;
+	__le32 action;
+	__le32 allow_rate_drop;
+	__le32 num_rates;
+	struct {
+		__le32 is_ht_rate;
+		__le32 enable_retry;
+		__le32 rate;
+		__le32 retry_count;
+	} rate_entry[8];
+	__le32 rate_type;
+	__le32 reserved1;
+	__le32 reserved2;
+} __packed;
+
+#define MWL8K_USE_AUTO_RATE	0x0002
+#define MWL8K_UCAST_RATE	0
+
+static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
+{
+	struct mwl8k_cmd_use_fixed_rate_sta *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
+	cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_USE_FIXED_RATE (AP version).
+ */
+struct mwl8k_cmd_use_fixed_rate_ap {
+	struct mwl8k_cmd_pkt header;
+	__le32 action;
+	__le32 allow_rate_drop;
+	__le32 num_rates;
+	struct mwl8k_rate_entry_ap {
+		__le32 is_ht_rate;
+		__le32 enable_retry;
+		__le32 rate;
+		__le32 retry_count;
+	} rate_entry[4];
+	u8 multicast_rate;
+	u8 multicast_rate_type;
+	u8 management_rate;
+} __packed;
+
+static int
+mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
+{
+	struct mwl8k_cmd_use_fixed_rate_ap *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
+	cmd->multicast_rate = mcast;
+	cmd->management_rate = mgmt;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_ENABLE_SNIFFER.
+ */
+struct mwl8k_cmd_enable_sniffer {
+	struct mwl8k_cmd_pkt header;
+	__le32 action;
+} __packed;
+
+static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
+{
+	struct mwl8k_cmd_enable_sniffer *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32(!!enable);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+struct mwl8k_cmd_update_mac_addr {
+	struct mwl8k_cmd_pkt header;
+	union {
+		struct {
+			__le16 mac_type;
+			__u8 mac_addr[ETH_ALEN];
+		} mbss;
+		__u8 mac_addr[ETH_ALEN];
+	};
+} __packed;
+
+#define MWL8K_MAC_TYPE_PRIMARY_CLIENT		0
+#define MWL8K_MAC_TYPE_SECONDARY_CLIENT		1
+#define MWL8K_MAC_TYPE_PRIMARY_AP		2
+#define MWL8K_MAC_TYPE_SECONDARY_AP		3
+
+static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
+				  struct ieee80211_vif *vif, u8 *mac, bool set)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+	struct mwl8k_cmd_update_mac_addr *cmd;
+	int mac_type;
+	int rc;
+
+	mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
+	if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
+		if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
+			if (priv->ap_fw)
+				mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
+			else
+				mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
+		else
+			mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
+	} else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
+		if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
+			mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
+		else
+			mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
+	}
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	if (set)
+		cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
+	else
+		cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
+
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	if (priv->ap_fw) {
+		cmd->mbss.mac_type = cpu_to_le16(mac_type);
+		memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
+	} else {
+		memcpy(cmd->mac_addr, mac, ETH_ALEN);
+	}
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * MWL8K_CMD_SET_MAC_ADDR.
+ */
+static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
+				  struct ieee80211_vif *vif, u8 *mac)
+{
+	return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
+}
+
+/*
+ * MWL8K_CMD_DEL_MAC_ADDR.
+ */
+static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
+				  struct ieee80211_vif *vif, u8 *mac)
+{
+	return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
+}
+
+/*
+ * CMD_SET_RATEADAPT_MODE.
+ */
+struct mwl8k_cmd_set_rate_adapt_mode {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 mode;
+} __packed;
+
+static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
+{
+	struct mwl8k_cmd_set_rate_adapt_mode *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
+	cmd->mode = cpu_to_le16(mode);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_GET_WATCHDOG_BITMAP.
+ */
+struct mwl8k_cmd_get_watchdog_bitmap {
+	struct mwl8k_cmd_pkt header;
+	u8	bitmap;
+} __packed;
+
+static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
+{
+	struct mwl8k_cmd_get_watchdog_bitmap *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	if (!rc)
+		*bitmap = cmd->bitmap;
+
+	kfree(cmd);
+
+	return rc;
+}
+
+#define MWL8K_WMM_QUEUE_NUMBER	3
+
+static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
+			     u8 idx);
+
+static void mwl8k_watchdog_ba_events(struct work_struct *work)
+{
+	int rc;
+	u8 bitmap = 0, stream_index;
+	struct mwl8k_ampdu_stream *streams;
+	struct mwl8k_priv *priv =
+		container_of(work, struct mwl8k_priv, watchdog_ba_handle);
+	struct ieee80211_hw *hw = priv->hw;
+	int i;
+	u32 status = 0;
+
+	mwl8k_fw_lock(hw);
+
+	rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
+	if (rc)
+		goto done;
+
+	spin_lock(&priv->stream_lock);
+
+	/* the bitmap is the hw queue number.  Map it to the ampdu queue. */
+	for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
+		if (bitmap & (1 << i)) {
+			stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
+				       TOTAL_HW_TX_QUEUES;
+			streams = &priv->ampdu[stream_index];
+			if (streams->state == AMPDU_STREAM_ACTIVE) {
+				ieee80211_stop_tx_ba_session(streams->sta,
+							     streams->tid);
+				spin_unlock(&priv->stream_lock);
+				mwl8k_destroy_ba(hw, stream_index);
+				spin_lock(&priv->stream_lock);
+			}
+		}
+	}
+
+	spin_unlock(&priv->stream_lock);
+done:
+	atomic_dec(&priv->watchdog_event_pending);
+	status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
+	iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
+		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
+	mwl8k_fw_unlock(hw);
+	return;
+}
+
+
+/*
+ * CMD_BSS_START.
+ */
+struct mwl8k_cmd_bss_start {
+	struct mwl8k_cmd_pkt header;
+	__le32 enable;
+} __packed;
+
+static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
+			       struct ieee80211_vif *vif, int enable)
+{
+	struct mwl8k_cmd_bss_start *cmd;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+
+	if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
+		return 0;
+
+	if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
+		return 0;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->enable = cpu_to_le32(enable);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+	kfree(cmd);
+
+	if (!rc) {
+		if (enable)
+			priv->running_bsses |= (1 << mwl8k_vif->macid);
+		else
+			priv->running_bsses &= ~(1 << mwl8k_vif->macid);
+	}
+	return rc;
+}
+
+static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mwl8k_vif, *tmp_vif;
+	struct ieee80211_vif *vif;
+
+	list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
+		vif = mwl8k_vif->vif;
+
+		if (!(bitmap & (1 << mwl8k_vif->macid)))
+			continue;
+
+		if (vif->type == NL80211_IFTYPE_AP)
+			mwl8k_cmd_bss_start(hw, vif, enable);
+	}
+}
+/*
+ * CMD_BASTREAM.
+ */
+
+/*
+ * UPSTREAM is tx direction
+ */
+#define BASTREAM_FLAG_DIRECTION_UPSTREAM	0x00
+#define BASTREAM_FLAG_IMMEDIATE_TYPE		0x01
+
+enum ba_stream_action_type {
+	MWL8K_BA_CREATE,
+	MWL8K_BA_UPDATE,
+	MWL8K_BA_DESTROY,
+	MWL8K_BA_FLUSH,
+	MWL8K_BA_CHECK,
+};
+
+
+struct mwl8k_create_ba_stream {
+	__le32	flags;
+	__le32	idle_thrs;
+	__le32	bar_thrs;
+	__le32	window_size;
+	u8	peer_mac_addr[6];
+	u8	dialog_token;
+	u8	tid;
+	u8	queue_id;
+	u8	param_info;
+	__le32	ba_context;
+	u8	reset_seq_no_flag;
+	__le16	curr_seq_no;
+	u8	sta_src_mac_addr[6];
+} __packed;
+
+struct mwl8k_destroy_ba_stream {
+	__le32	flags;
+	__le32	ba_context;
+} __packed;
+
+struct mwl8k_cmd_bastream {
+	struct mwl8k_cmd_pkt	header;
+	__le32	action;
+	union {
+		struct mwl8k_create_ba_stream	create_params;
+		struct mwl8k_destroy_ba_stream	destroy_params;
+	};
+} __packed;
+
+static int
+mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
+	       struct ieee80211_vif *vif)
+{
+	struct mwl8k_cmd_bastream *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
+
+	cmd->create_params.queue_id = stream->idx;
+	memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
+	       ETH_ALEN);
+	cmd->create_params.tid = stream->tid;
+
+	cmd->create_params.flags =
+		cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
+		cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+
+	kfree(cmd);
+
+	return rc;
+}
+
+static int
+mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
+		u8 buf_size, struct ieee80211_vif *vif)
+{
+	struct mwl8k_cmd_bastream *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+
+	cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
+
+	cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
+	cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
+	cmd->create_params.queue_id = stream->idx;
+
+	memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
+	cmd->create_params.tid = stream->tid;
+	cmd->create_params.curr_seq_no = cpu_to_le16(0);
+	cmd->create_params.reset_seq_no_flag = 1;
+
+	cmd->create_params.param_info =
+		(stream->sta->ht_cap.ampdu_factor &
+		 IEEE80211_HT_AMPDU_PARM_FACTOR) |
+		((stream->sta->ht_cap.ampdu_density << 2) &
+		 IEEE80211_HT_AMPDU_PARM_DENSITY);
+
+	cmd->create_params.flags =
+		cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
+					BASTREAM_FLAG_DIRECTION_UPSTREAM);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+
+	wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
+		stream->sta->addr, stream->tid);
+	kfree(cmd);
+
+	return rc;
+}
+
+static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
+			     u8 idx)
+{
+	struct mwl8k_cmd_bastream *cmd;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
+
+	cmd->destroy_params.ba_context = cpu_to_le32(idx);
+	mwl8k_post_cmd(hw, &cmd->header);
+
+	wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
+
+	kfree(cmd);
+}
+
+/*
+ * CMD_SET_NEW_STN.
+ */
+struct mwl8k_cmd_set_new_stn {
+	struct mwl8k_cmd_pkt header;
+	__le16 aid;
+	__u8 mac_addr[6];
+	__le16 stn_id;
+	__le16 action;
+	__le16 rsvd;
+	__le32 legacy_rates;
+	__u8 ht_rates[4];
+	__le16 cap_info;
+	__le16 ht_capabilities_info;
+	__u8 mac_ht_param_info;
+	__u8 rev;
+	__u8 control_channel;
+	__u8 add_channel;
+	__le16 op_mode;
+	__le16 stbc;
+	__u8 add_qos_info;
+	__u8 is_qos_sta;
+	__le32 fw_sta_ptr;
+} __packed;
+
+#define MWL8K_STA_ACTION_ADD		0
+#define MWL8K_STA_ACTION_REMOVE		2
+
+static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
+				     struct ieee80211_vif *vif,
+				     struct ieee80211_sta *sta)
+{
+	struct mwl8k_cmd_set_new_stn *cmd;
+	u32 rates;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->aid = cpu_to_le16(sta->aid);
+	memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
+	cmd->stn_id = cpu_to_le16(sta->aid);
+	cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
+	if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
+		rates = sta->supp_rates[NL80211_BAND_2GHZ];
+	else
+		rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
+	cmd->legacy_rates = cpu_to_le32(rates);
+	if (sta->ht_cap.ht_supported) {
+		cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
+		cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
+		cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
+		cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
+		cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
+		cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
+			((sta->ht_cap.ampdu_density & 7) << 2);
+		cmd->is_qos_sta = 1;
+	}
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
+					  struct ieee80211_vif *vif)
+{
+	struct mwl8k_cmd_set_new_stn *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
+				     struct ieee80211_vif *vif, u8 *addr)
+{
+	struct mwl8k_cmd_set_new_stn *cmd;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc, i;
+	u8 idx;
+
+	spin_lock(&priv->stream_lock);
+	/* Destroy any active ampdu streams for this sta */
+	for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
+		struct mwl8k_ampdu_stream *s;
+		s = &priv->ampdu[i];
+		if (s->state != AMPDU_NO_STREAM) {
+			if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
+				if (s->state == AMPDU_STREAM_ACTIVE) {
+					idx = s->idx;
+					spin_unlock(&priv->stream_lock);
+					mwl8k_destroy_ba(hw, idx);
+					spin_lock(&priv->stream_lock);
+				} else if (s->state == AMPDU_STREAM_NEW) {
+					mwl8k_remove_stream(hw, s);
+				}
+			}
+		}
+	}
+
+	spin_unlock(&priv->stream_lock);
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	memcpy(cmd->mac_addr, addr, ETH_ALEN);
+	cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_UPDATE_ENCRYPTION.
+ */
+
+#define MAX_ENCR_KEY_LENGTH	16
+#define MIC_KEY_LENGTH		8
+
+struct mwl8k_cmd_update_encryption {
+	struct mwl8k_cmd_pkt header;
+
+	__le32 action;
+	__le32 reserved;
+	__u8 mac_addr[6];
+	__u8 encr_type;
+
+} __packed;
+
+struct mwl8k_cmd_set_key {
+	struct mwl8k_cmd_pkt header;
+
+	__le32 action;
+	__le32 reserved;
+	__le16 length;
+	__le16 key_type_id;
+	__le32 key_info;
+	__le32 key_id;
+	__le16 key_len;
+	__u8 key_material[MAX_ENCR_KEY_LENGTH];
+	__u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
+	__u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
+	__le16 tkip_rsc_low;
+	__le32 tkip_rsc_high;
+	__le16 tkip_tsc_low;
+	__le32 tkip_tsc_high;
+	__u8 mac_addr[6];
+} __packed;
+
+enum {
+	MWL8K_ENCR_ENABLE,
+	MWL8K_ENCR_SET_KEY,
+	MWL8K_ENCR_REMOVE_KEY,
+	MWL8K_ENCR_SET_GROUP_KEY,
+};
+
+#define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP	0
+#define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE	1
+#define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP	4
+#define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED	7
+#define MWL8K_UPDATE_ENCRYPTION_TYPE_AES	8
+
+enum {
+	MWL8K_ALG_WEP,
+	MWL8K_ALG_TKIP,
+	MWL8K_ALG_CCMP,
+};
+
+#define MWL8K_KEY_FLAG_TXGROUPKEY	0x00000004
+#define MWL8K_KEY_FLAG_PAIRWISE		0x00000008
+#define MWL8K_KEY_FLAG_TSC_VALID	0x00000040
+#define MWL8K_KEY_FLAG_WEP_TXKEY	0x01000000
+#define MWL8K_KEY_FLAG_MICKEY_VALID	0x02000000
+
+static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
+					      struct ieee80211_vif *vif,
+					      u8 *addr,
+					      u8 encr_type)
+{
+	struct mwl8k_cmd_update_encryption *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
+	memcpy(cmd->mac_addr, addr, ETH_ALEN);
+	cmd->encr_type = encr_type;
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
+						u8 *addr,
+						struct ieee80211_key_conf *key)
+{
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->length = cpu_to_le16(sizeof(*cmd) -
+				offsetof(struct mwl8k_cmd_set_key, length));
+	cmd->key_id = cpu_to_le32(key->keyidx);
+	cmd->key_len = cpu_to_le16(key->keylen);
+	memcpy(cmd->mac_addr, addr, ETH_ALEN);
+
+	switch (key->cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
+		if (key->keyidx == 0)
+			cmd->key_info =	cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
+
+		break;
+	case WLAN_CIPHER_SUITE_TKIP:
+		cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
+		cmd->key_info =	(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
+			? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
+			: cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
+		cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
+						| MWL8K_KEY_FLAG_TSC_VALID);
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
+		cmd->key_info =	(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
+			? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
+			: cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
+		break;
+	default:
+		return -ENOTSUPP;
+	}
+
+	return 0;
+}
+
+static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
+						struct ieee80211_vif *vif,
+						u8 *addr,
+						struct ieee80211_key_conf *key)
+{
+	struct mwl8k_cmd_set_key *cmd;
+	int rc;
+	int keymlen;
+	u32 action;
+	u8 idx;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
+	if (rc < 0)
+		goto done;
+
+	idx = key->keyidx;
+
+	if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
+		action = MWL8K_ENCR_SET_KEY;
+	else
+		action = MWL8K_ENCR_SET_GROUP_KEY;
+
+	switch (key->cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		if (!mwl8k_vif->wep_key_conf[idx].enabled) {
+			memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
+						sizeof(*key) + key->keylen);
+			mwl8k_vif->wep_key_conf[idx].enabled = 1;
+		}
+
+		keymlen = key->keylen;
+		action = MWL8K_ENCR_SET_KEY;
+		break;
+	case WLAN_CIPHER_SUITE_TKIP:
+		keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		keymlen = key->keylen;
+		break;
+	default:
+		rc = -ENOTSUPP;
+		goto done;
+	}
+
+	memcpy(cmd->key_material, key->key, keymlen);
+	cmd->action = cpu_to_le32(action);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+done:
+	kfree(cmd);
+
+	return rc;
+}
+
+static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
+						struct ieee80211_vif *vif,
+						u8 *addr,
+						struct ieee80211_key_conf *key)
+{
+	struct mwl8k_cmd_set_key *cmd;
+	int rc;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
+	if (rc < 0)
+		goto done;
+
+	if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
+			key->cipher == WLAN_CIPHER_SUITE_WEP104)
+		mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
+
+	cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
+
+	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
+done:
+	kfree(cmd);
+
+	return rc;
+}
+
+static int mwl8k_set_key(struct ieee80211_hw *hw,
+			 enum set_key_cmd cmd_param,
+			 struct ieee80211_vif *vif,
+			 struct ieee80211_sta *sta,
+			 struct ieee80211_key_conf *key)
+{
+	int rc = 0;
+	u8 encr_type;
+	u8 *addr;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+	struct mwl8k_priv *priv = hw->priv;
+
+	if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
+		return -EOPNOTSUPP;
+
+	if (sta == NULL)
+		addr = vif->addr;
+	else
+		addr = sta->addr;
+
+	if (cmd_param == SET_KEY) {
+		rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
+		if (rc)
+			goto out;
+
+		if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
+				|| (key->cipher == WLAN_CIPHER_SUITE_WEP104))
+			encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
+		else
+			encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
+
+		rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
+								encr_type);
+		if (rc)
+			goto out;
+
+		mwl8k_vif->is_hw_crypto_enabled = true;
+
+	} else {
+		rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
+
+		if (rc)
+			goto out;
+	}
+out:
+	return rc;
+}
+
+/*
+ * CMD_UPDATE_STADB.
+ */
+struct ewc_ht_info {
+	__le16	control1;
+	__le16	control2;
+	__le16	control3;
+} __packed;
+
+struct peer_capability_info {
+	/* Peer type - AP vs. STA.  */
+	__u8	peer_type;
+
+	/* Basic 802.11 capabilities from assoc resp.  */
+	__le16	basic_caps;
+
+	/* Set if peer supports 802.11n high throughput (HT).  */
+	__u8	ht_support;
+
+	/* Valid if HT is supported.  */
+	__le16	ht_caps;
+	__u8	extended_ht_caps;
+	struct ewc_ht_info	ewc_info;
+
+	/* Legacy rate table. Intersection of our rates and peer rates.  */
+	__u8	legacy_rates[12];
+
+	/* HT rate table. Intersection of our rates and peer rates.  */
+	__u8	ht_rates[16];
+	__u8	pad[16];
+
+	/* If set, interoperability mode, no proprietary extensions.  */
+	__u8	interop;
+	__u8	pad2;
+	__u8	station_id;
+	__le16	amsdu_enabled;
+} __packed;
+
+struct mwl8k_cmd_update_stadb {
+	struct mwl8k_cmd_pkt header;
+
+	/* See STADB_ACTION_TYPE */
+	__le32	action;
+
+	/* Peer MAC address */
+	__u8	peer_addr[ETH_ALEN];
+
+	__le32	reserved;
+
+	/* Peer info - valid during add/update.  */
+	struct peer_capability_info	peer_info;
+} __packed;
+
+#define MWL8K_STA_DB_MODIFY_ENTRY	1
+#define MWL8K_STA_DB_DEL_ENTRY		2
+
+/* Peer Entry flags - used to define the type of the peer node */
+#define MWL8K_PEER_TYPE_ACCESSPOINT	2
+
+static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif,
+				      struct ieee80211_sta *sta)
+{
+	struct mwl8k_cmd_update_stadb *cmd;
+	struct peer_capability_info *p;
+	u32 rates;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
+	memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
+
+	p = &cmd->peer_info;
+	p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
+	p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
+	p->ht_support = sta->ht_cap.ht_supported;
+	p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
+	p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
+		((sta->ht_cap.ampdu_density & 7) << 2);
+	if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
+		rates = sta->supp_rates[NL80211_BAND_2GHZ];
+	else
+		rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
+	legacy_rate_mask_to_array(p->legacy_rates, rates);
+	memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
+	p->interop = 1;
+	p->amsdu_enabled = 0;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	if (!rc)
+		rc = p->station_id;
+	kfree(cmd);
+
+	return rc;
+}
+
+static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif, u8 *addr)
+{
+	struct mwl8k_cmd_update_stadb *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
+	cmd->header.length = cpu_to_le16(sizeof(*cmd));
+	cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
+	memcpy(cmd->peer_addr, addr, ETH_ALEN);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+
+/*
+ * Interrupt handling.
+ */
+static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
+{
+	struct ieee80211_hw *hw = dev_id;
+	struct mwl8k_priv *priv = hw->priv;
+	u32 status;
+
+	status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+	if (!status)
+		return IRQ_NONE;
+
+	if (status & MWL8K_A2H_INT_TX_DONE) {
+		status &= ~MWL8K_A2H_INT_TX_DONE;
+		tasklet_schedule(&priv->poll_tx_task);
+	}
+
+	if (status & MWL8K_A2H_INT_RX_READY) {
+		status &= ~MWL8K_A2H_INT_RX_READY;
+		tasklet_schedule(&priv->poll_rx_task);
+	}
+
+	if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
+		iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
+			  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
+
+		atomic_inc(&priv->watchdog_event_pending);
+		status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
+		ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
+	}
+
+	if (status)
+		iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+
+	if (status & MWL8K_A2H_INT_OPC_DONE) {
+		if (priv->hostcmd_wait != NULL)
+			complete(priv->hostcmd_wait);
+	}
+
+	if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
+		if (!mutex_is_locked(&priv->fw_mutex) &&
+		    priv->radio_on && priv->pending_tx_pkts)
+			mwl8k_tx_start(priv);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void mwl8k_tx_poll(struct tasklet_struct *t)
+{
+	struct mwl8k_priv *priv = from_tasklet(priv, t, poll_tx_task);
+	struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
+	int limit;
+	int i;
+
+	limit = 32;
+
+	spin_lock(&priv->tx_lock);
+
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
+
+	if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
+		complete(priv->tx_wait);
+		priv->tx_wait = NULL;
+	}
+
+	spin_unlock(&priv->tx_lock);
+
+	if (limit) {
+		writel(~MWL8K_A2H_INT_TX_DONE,
+		       priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+	} else {
+		tasklet_schedule(&priv->poll_tx_task);
+	}
+}
+
+static void mwl8k_rx_poll(struct tasklet_struct *t)
+{
+	struct mwl8k_priv *priv = from_tasklet(priv, t, poll_rx_task);
+	struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
+	int limit;
+
+	limit = 32;
+	limit -= rxq_process(hw, 0, limit);
+	limit -= rxq_refill(hw, 0, limit);
+
+	if (limit) {
+		writel(~MWL8K_A2H_INT_RX_READY,
+		       priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+	} else {
+		tasklet_schedule(&priv->poll_rx_task);
+	}
+}
+
+
+/*
+ * Core driver operations.
+ */
+static void mwl8k_tx(struct ieee80211_hw *hw,
+		     struct ieee80211_tx_control *control,
+		     struct sk_buff *skb)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int index = skb_get_queue_mapping(skb);
+
+	if (!priv->radio_on) {
+		wiphy_debug(hw->wiphy,
+			    "dropped TX frame since radio disabled\n");
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	mwl8k_txq_xmit(hw, index, control->sta, skb);
+}
+
+static int mwl8k_start(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+
+	rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
+			 IRQF_SHARED, MWL8K_NAME, hw);
+	if (rc) {
+		priv->irq = -1;
+		wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
+		return -EIO;
+	}
+	priv->irq = priv->pdev->irq;
+
+	/* Enable TX reclaim and RX tasklets.  */
+	tasklet_enable(&priv->poll_tx_task);
+	tasklet_enable(&priv->poll_rx_task);
+
+	/* Enable interrupts */
+	iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	iowrite32(MWL8K_A2H_EVENTS,
+		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
+
+	rc = mwl8k_fw_lock(hw);
+	if (!rc) {
+		rc = mwl8k_cmd_radio_enable(hw);
+
+		if (!priv->ap_fw) {
+			if (!rc)
+				rc = mwl8k_cmd_enable_sniffer(hw, 0);
+
+			if (!rc)
+				rc = mwl8k_cmd_set_pre_scan(hw);
+
+			if (!rc)
+				rc = mwl8k_cmd_set_post_scan(hw,
+						"\x00\x00\x00\x00\x00\x00");
+		}
+
+		if (!rc)
+			rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
+
+		if (!rc)
+			rc = mwl8k_cmd_set_wmm_mode(hw, 0);
+
+		mwl8k_fw_unlock(hw);
+	}
+
+	if (rc) {
+		iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+		free_irq(priv->pdev->irq, hw);
+		priv->irq = -1;
+		tasklet_disable(&priv->poll_tx_task);
+		tasklet_disable(&priv->poll_rx_task);
+	} else {
+		ieee80211_wake_queues(hw);
+	}
+
+	return rc;
+}
+
+static void mwl8k_stop(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int i;
+
+	if (!priv->hw_restart_in_progress)
+		mwl8k_cmd_radio_disable(hw);
+
+	ieee80211_stop_queues(hw);
+
+	/* Disable interrupts */
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	if (priv->irq != -1) {
+		free_irq(priv->pdev->irq, hw);
+		priv->irq = -1;
+	}
+
+	/* Stop finalize join worker */
+	cancel_work_sync(&priv->finalize_join_worker);
+	cancel_work_sync(&priv->watchdog_ba_handle);
+	if (priv->beacon_skb != NULL)
+		dev_kfree_skb(priv->beacon_skb);
+
+	/* Stop TX reclaim and RX tasklets.  */
+	tasklet_disable(&priv->poll_tx_task);
+	tasklet_disable(&priv->poll_rx_task);
+
+	/* Return all skbs to mac80211 */
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
+}
+
+static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
+
+static int mwl8k_add_interface(struct ieee80211_hw *hw,
+			       struct ieee80211_vif *vif)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mwl8k_vif;
+	u32 macids_supported;
+	int macid, rc;
+	struct mwl8k_device_info *di;
+
+	/*
+	 * Reject interface creation if sniffer mode is active, as
+	 * STA operation is mutually exclusive with hardware sniffer
+	 * mode.  (Sniffer mode is only used on STA firmware.)
+	 */
+	if (priv->sniffer_enabled) {
+		wiphy_info(hw->wiphy,
+			   "unable to create STA interface because sniffer mode is enabled\n");
+		return -EINVAL;
+	}
+
+	di = priv->device_info;
+	switch (vif->type) {
+	case NL80211_IFTYPE_AP:
+		if (!priv->ap_fw && di->fw_image_ap) {
+			/* we must load the ap fw to meet this request */
+			if (!list_empty(&priv->vif_list))
+				return -EBUSY;
+			rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
+			if (rc)
+				return rc;
+		}
+		macids_supported = priv->ap_macids_supported;
+		break;
+	case NL80211_IFTYPE_STATION:
+		if (priv->ap_fw && di->fw_image_sta) {
+			if (!list_empty(&priv->vif_list)) {
+				wiphy_warn(hw->wiphy, "AP interface is running.\n"
+					   "Adding STA interface for WDS");
+			} else {
+				/* we must load the sta fw to
+				 * meet this request.
+				 */
+				rc = mwl8k_reload_firmware(hw,
+							   di->fw_image_sta);
+				if (rc)
+					return rc;
+			}
+		}
+		macids_supported = priv->sta_macids_supported;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	macid = ffs(macids_supported & ~priv->macids_used);
+	if (!macid--)
+		return -EBUSY;
+
+	/* Setup driver private area. */
+	mwl8k_vif = MWL8K_VIF(vif);
+	memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
+	mwl8k_vif->vif = vif;
+	mwl8k_vif->macid = macid;
+	mwl8k_vif->seqno = 0;
+	memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
+	mwl8k_vif->is_hw_crypto_enabled = false;
+
+	/* Set the mac address.  */
+	mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
+
+	if (vif->type == NL80211_IFTYPE_AP)
+		mwl8k_cmd_set_new_stn_add_self(hw, vif);
+
+	priv->macids_used |= 1 << mwl8k_vif->macid;
+	list_add_tail(&mwl8k_vif->list, &priv->vif_list);
+
+	return 0;
+}
+
+static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
+{
+	/* Has ieee80211_restart_hw re-added the removed interfaces? */
+	if (!priv->macids_used)
+		return;
+
+	priv->macids_used &= ~(1 << vif->macid);
+	list_del(&vif->list);
+}
+
+static void mwl8k_remove_interface(struct ieee80211_hw *hw,
+				   struct ieee80211_vif *vif)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+
+	if (vif->type == NL80211_IFTYPE_AP)
+		mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
+
+	mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
+
+	mwl8k_remove_vif(priv, mwl8k_vif);
+}
+
+static void mwl8k_hw_restart_work(struct work_struct *work)
+{
+	struct mwl8k_priv *priv =
+		container_of(work, struct mwl8k_priv, fw_reload);
+	struct ieee80211_hw *hw = priv->hw;
+	struct mwl8k_device_info *di;
+	int rc;
+
+	/* If some command is waiting for a response, clear it */
+	if (priv->hostcmd_wait != NULL) {
+		complete(priv->hostcmd_wait);
+		priv->hostcmd_wait = NULL;
+	}
+
+	priv->hw_restart_owner = current;
+	di = priv->device_info;
+	mwl8k_fw_lock(hw);
+
+	if (priv->ap_fw)
+		rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
+	else
+		rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
+
+	if (rc)
+		goto fail;
+
+	priv->hw_restart_owner = NULL;
+	priv->hw_restart_in_progress = false;
+
+	/*
+	 * This unlock will wake up the queues and
+	 * also opens the command path for other
+	 * commands
+	 */
+	mwl8k_fw_unlock(hw);
+
+	ieee80211_restart_hw(hw);
+
+	wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
+
+	return;
+fail:
+	mwl8k_fw_unlock(hw);
+
+	wiphy_err(hw->wiphy, "Firmware restart failed\n");
+}
+
+static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
+{
+	struct ieee80211_conf *conf = &hw->conf;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+
+	rc = mwl8k_fw_lock(hw);
+	if (rc)
+		return rc;
+
+	if (conf->flags & IEEE80211_CONF_IDLE)
+		rc = mwl8k_cmd_radio_disable(hw);
+	else
+		rc = mwl8k_cmd_radio_enable(hw);
+	if (rc)
+		goto out;
+
+	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+		rc = mwl8k_cmd_set_rf_channel(hw, conf);
+		if (rc)
+			goto out;
+	}
+
+	if (conf->power_level > 18)
+		conf->power_level = 18;
+
+	if (priv->ap_fw) {
+
+		if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
+			rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
+			if (rc)
+				goto out;
+		}
+
+
+	} else {
+		rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
+		if (rc)
+			goto out;
+		rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
+	}
+
+out:
+	mwl8k_fw_unlock(hw);
+
+	return rc;
+}
+
+static void
+mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			   struct ieee80211_bss_conf *info, u32 changed)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	u32 ap_legacy_rates = 0;
+	u8 ap_mcs_rates[16];
+	int rc;
+
+	if (mwl8k_fw_lock(hw))
+		return;
+
+	/*
+	 * No need to capture a beacon if we're no longer associated.
+	 */
+	if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
+		priv->capture_beacon = false;
+
+	/*
+	 * Get the AP's legacy and MCS rates.
+	 */
+	if (vif->bss_conf.assoc) {
+		struct ieee80211_sta *ap;
+
+		rcu_read_lock();
+
+		ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
+		if (ap == NULL) {
+			rcu_read_unlock();
+			goto out;
+		}
+
+		if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
+			ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ];
+		} else {
+			ap_legacy_rates =
+				ap->supp_rates[NL80211_BAND_5GHZ] << 5;
+		}
+		memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
+
+		rcu_read_unlock();
+
+		if (changed & BSS_CHANGED_ASSOC) {
+			if (!priv->ap_fw) {
+				rc = mwl8k_cmd_set_rate(hw, vif,
+							ap_legacy_rates,
+							ap_mcs_rates);
+				if (rc)
+					goto out;
+
+				rc = mwl8k_cmd_use_fixed_rate_sta(hw);
+				if (rc)
+					goto out;
+			} else {
+				int idx;
+				int rate;
+
+				/* Use AP firmware specific rate command.
+				 */
+				idx = ffs(vif->bss_conf.basic_rates);
+				if (idx)
+					idx--;
+
+				if (hw->conf.chandef.chan->band ==
+				    NL80211_BAND_2GHZ)
+					rate = mwl8k_rates_24[idx].hw_value;
+				else
+					rate = mwl8k_rates_50[idx].hw_value;
+
+				mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
+			}
+		}
+	}
+
+	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
+		rc = mwl8k_set_radio_preamble(hw,
+				vif->bss_conf.use_short_preamble);
+		if (rc)
+			goto out;
+	}
+
+	if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
+		rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
+		if (rc)
+			goto out;
+	}
+
+	if (vif->bss_conf.assoc && !priv->ap_fw &&
+	    (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
+			BSS_CHANGED_HT))) {
+		rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
+		if (rc)
+			goto out;
+	}
+
+	if (vif->bss_conf.assoc &&
+	    (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
+		/*
+		 * Finalize the join.  Tell rx handler to process
+		 * next beacon from our BSSID.
+		 */
+		memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
+		priv->capture_beacon = true;
+	}
+
+out:
+	mwl8k_fw_unlock(hw);
+}
+
+static void
+mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			  struct ieee80211_bss_conf *info, u32 changed)
+{
+	int rc;
+
+	if (mwl8k_fw_lock(hw))
+		return;
+
+	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
+		rc = mwl8k_set_radio_preamble(hw,
+				vif->bss_conf.use_short_preamble);
+		if (rc)
+			goto out;
+	}
+
+	if (changed & BSS_CHANGED_BASIC_RATES) {
+		int idx;
+		int rate;
+
+		/*
+		 * Use lowest supported basic rate for multicasts
+		 * and management frames (such as probe responses --
+		 * beacons will always go out at 1 Mb/s).
+		 */
+		idx = ffs(vif->bss_conf.basic_rates);
+		if (idx)
+			idx--;
+
+		if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
+			rate = mwl8k_rates_24[idx].hw_value;
+		else
+			rate = mwl8k_rates_50[idx].hw_value;
+
+		mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
+	}
+
+	if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
+		struct sk_buff *skb;
+
+		skb = ieee80211_beacon_get(hw, vif);
+		if (skb != NULL) {
+			mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
+			kfree_skb(skb);
+		}
+	}
+
+	if (changed & BSS_CHANGED_BEACON_ENABLED)
+		mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
+
+out:
+	mwl8k_fw_unlock(hw);
+}
+
+static void
+mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		       struct ieee80211_bss_conf *info, u32 changed)
+{
+	if (vif->type == NL80211_IFTYPE_STATION)
+		mwl8k_bss_info_changed_sta(hw, vif, info, changed);
+	if (vif->type == NL80211_IFTYPE_AP)
+		mwl8k_bss_info_changed_ap(hw, vif, info, changed);
+}
+
+static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
+				   struct netdev_hw_addr_list *mc_list)
+{
+	struct mwl8k_cmd_pkt *cmd;
+
+	/*
+	 * Synthesize and return a command packet that programs the
+	 * hardware multicast address filter.  At this point we don't
+	 * know whether FIF_ALLMULTI is being requested, but if it is,
+	 * we'll end up throwing this packet away and creating a new
+	 * one in mwl8k_configure_filter().
+	 */
+	cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
+
+	return (unsigned long)cmd;
+}
+
+static int
+mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
+			       unsigned int changed_flags,
+			       unsigned int *total_flags)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	/*
+	 * Hardware sniffer mode is mutually exclusive with STA
+	 * operation, so refuse to enable sniffer mode if a STA
+	 * interface is active.
+	 */
+	if (!list_empty(&priv->vif_list)) {
+		if (net_ratelimit())
+			wiphy_info(hw->wiphy,
+				   "not enabling sniffer mode because STA interface is active\n");
+		return 0;
+	}
+
+	if (!priv->sniffer_enabled) {
+		if (mwl8k_cmd_enable_sniffer(hw, 1))
+			return 0;
+		priv->sniffer_enabled = true;
+	}
+
+	*total_flags &=	FIF_ALLMULTI |
+			FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
+			FIF_OTHER_BSS;
+
+	return 1;
+}
+
+static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
+{
+	if (!list_empty(&priv->vif_list))
+		return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
+
+	return NULL;
+}
+
+static void mwl8k_configure_filter(struct ieee80211_hw *hw,
+				   unsigned int changed_flags,
+				   unsigned int *total_flags,
+				   u64 multicast)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
+
+	/*
+	 * AP firmware doesn't allow fine-grained control over
+	 * the receive filter.
+	 */
+	if (priv->ap_fw) {
+		*total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
+		kfree(cmd);
+		return;
+	}
+
+	/*
+	 * Enable hardware sniffer mode if FIF_CONTROL or
+	 * FIF_OTHER_BSS is requested.
+	 */
+	if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
+	    mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
+		kfree(cmd);
+		return;
+	}
+
+	/* Clear unsupported feature flags */
+	*total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
+
+	if (mwl8k_fw_lock(hw)) {
+		kfree(cmd);
+		return;
+	}
+
+	if (priv->sniffer_enabled) {
+		mwl8k_cmd_enable_sniffer(hw, 0);
+		priv->sniffer_enabled = false;
+	}
+
+	if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
+		if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
+			/*
+			 * Disable the BSS filter.
+			 */
+			mwl8k_cmd_set_pre_scan(hw);
+		} else {
+			struct mwl8k_vif *mwl8k_vif;
+			const u8 *bssid;
+
+			/*
+			 * Enable the BSS filter.
+			 *
+			 * If there is an active STA interface, use that
+			 * interface's BSSID, otherwise use a dummy one
+			 * (where the OUI part needs to be nonzero for
+			 * the BSSID to be accepted by POST_SCAN).
+			 */
+			mwl8k_vif = mwl8k_first_vif(priv);
+			if (mwl8k_vif != NULL)
+				bssid = mwl8k_vif->vif->bss_conf.bssid;
+			else
+				bssid = "\x01\x00\x00\x00\x00\x00";
+
+			mwl8k_cmd_set_post_scan(hw, bssid);
+		}
+	}
+
+	/*
+	 * If FIF_ALLMULTI is being requested, throw away the command
+	 * packet that ->prepare_multicast() built and replace it with
+	 * a command packet that enables reception of all multicast
+	 * packets.
+	 */
+	if (*total_flags & FIF_ALLMULTI) {
+		kfree(cmd);
+		cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
+	}
+
+	if (cmd != NULL) {
+		mwl8k_post_cmd(hw, cmd);
+		kfree(cmd);
+	}
+
+	mwl8k_fw_unlock(hw);
+}
+
+static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
+{
+	return mwl8k_cmd_set_rts_threshold(hw, value);
+}
+
+static int mwl8k_sta_remove(struct ieee80211_hw *hw,
+			    struct ieee80211_vif *vif,
+			    struct ieee80211_sta *sta)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	if (priv->ap_fw)
+		return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
+	else
+		return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
+}
+
+static int mwl8k_sta_add(struct ieee80211_hw *hw,
+			 struct ieee80211_vif *vif,
+			 struct ieee80211_sta *sta)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int ret;
+	int i;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+	struct ieee80211_key_conf *key;
+
+	if (!priv->ap_fw) {
+		ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
+		if (ret >= 0) {
+			MWL8K_STA(sta)->peer_id = ret;
+			if (sta->ht_cap.ht_supported)
+				MWL8K_STA(sta)->is_ampdu_allowed = true;
+			ret = 0;
+		}
+
+	} else {
+		ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
+	}
+
+	for (i = 0; i < NUM_WEP_KEYS; i++) {
+		key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
+		if (mwl8k_vif->wep_key_conf[i].enabled)
+			mwl8k_set_key(hw, SET_KEY, vif, sta, key);
+	}
+	return ret;
+}
+
+static int mwl8k_conf_tx(struct ieee80211_hw *hw,
+			 struct ieee80211_vif *vif, u16 queue,
+			 const struct ieee80211_tx_queue_params *params)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+
+	rc = mwl8k_fw_lock(hw);
+	if (!rc) {
+		BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
+		memcpy(&priv->wmm_params[queue], params, sizeof(*params));
+
+		if (!priv->wmm_enabled)
+			rc = mwl8k_cmd_set_wmm_mode(hw, 1);
+
+		if (!rc) {
+			int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
+			rc = mwl8k_cmd_set_edca_params(hw, q,
+						       params->cw_min,
+						       params->cw_max,
+						       params->aifs,
+						       params->txop);
+		}
+
+		mwl8k_fw_unlock(hw);
+	}
+
+	return rc;
+}
+
+static int mwl8k_get_stats(struct ieee80211_hw *hw,
+			   struct ieee80211_low_level_stats *stats)
+{
+	return mwl8k_cmd_get_stat(hw, stats);
+}
+
+static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
+				struct survey_info *survey)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct ieee80211_conf *conf = &hw->conf;
+	struct ieee80211_supported_band *sband;
+
+	if (priv->ap_fw) {
+		sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
+
+		if (sband && idx >= sband->n_channels) {
+			idx -= sband->n_channels;
+			sband = NULL;
+		}
+
+		if (!sband)
+			sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
+
+		if (!sband || idx >= sband->n_channels)
+			return -ENOENT;
+
+		memcpy(survey, &priv->survey[idx], sizeof(*survey));
+		survey->channel = &sband->channels[idx];
+
+		return 0;
+	}
+
+	if (idx != 0)
+		return -ENOENT;
+
+	survey->channel = conf->chandef.chan;
+	survey->filled = SURVEY_INFO_NOISE_DBM;
+	survey->noise = priv->noise;
+
+	return 0;
+}
+
+#define MAX_AMPDU_ATTEMPTS 5
+
+static int
+mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   struct ieee80211_ampdu_params *params)
+{
+	struct ieee80211_sta *sta = params->sta;
+	enum ieee80211_ampdu_mlme_action action = params->action;
+	u16 tid = params->tid;
+	u16 *ssn = &params->ssn;
+	u8 buf_size = params->buf_size;
+	int i, rc = 0;
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_ampdu_stream *stream;
+	u8 *addr = sta->addr, idx;
+	struct mwl8k_sta *sta_info = MWL8K_STA(sta);
+
+	if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
+		return -ENOTSUPP;
+
+	spin_lock(&priv->stream_lock);
+	stream = mwl8k_lookup_stream(hw, addr, tid);
+
+	switch (action) {
+	case IEEE80211_AMPDU_RX_START:
+	case IEEE80211_AMPDU_RX_STOP:
+		break;
+	case IEEE80211_AMPDU_TX_START:
+		/* By the time we get here the hw queues may contain outgoing
+		 * packets for this RA/TID that are not part of this BA
+		 * session.  The hw will assign sequence numbers to these
+		 * packets as they go out.  So if we query the hw for its next
+		 * sequence number and use that for the SSN here, it may end up
+		 * being wrong, which will lead to sequence number mismatch at
+		 * the recipient.  To avoid this, we reset the sequence number
+		 * to O for the first MPDU in this BA stream.
+		 */
+		*ssn = 0;
+		if (stream == NULL) {
+			/* This means that somebody outside this driver called
+			 * ieee80211_start_tx_ba_session.  This is unexpected
+			 * because we do our own rate control.  Just warn and
+			 * move on.
+			 */
+			wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
+				   "Proceeding anyway.\n", __func__);
+			stream = mwl8k_add_stream(hw, sta, tid);
+		}
+		if (stream == NULL) {
+			wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
+			rc = -EBUSY;
+			break;
+		}
+		stream->state = AMPDU_STREAM_IN_PROGRESS;
+
+		/* Release the lock before we do the time consuming stuff */
+		spin_unlock(&priv->stream_lock);
+		for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
+
+			/* Check if link is still valid */
+			if (!sta_info->is_ampdu_allowed) {
+				spin_lock(&priv->stream_lock);
+				mwl8k_remove_stream(hw, stream);
+				spin_unlock(&priv->stream_lock);
+				return -EBUSY;
+			}
+
+			rc = mwl8k_check_ba(hw, stream, vif);
+
+			/* If HW restart is in progress mwl8k_post_cmd will
+			 * return -EBUSY. Avoid retrying mwl8k_check_ba in
+			 * such cases
+			 */
+			if (!rc || rc == -EBUSY)
+				break;
+			/*
+			 * HW queues take time to be flushed, give them
+			 * sufficient time
+			 */
+
+			msleep(1000);
+		}
+		spin_lock(&priv->stream_lock);
+		if (rc) {
+			wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
+				" attempts\n", tid, MAX_AMPDU_ATTEMPTS);
+			mwl8k_remove_stream(hw, stream);
+			rc = -EBUSY;
+			break;
+		}
+		rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
+		break;
+	case IEEE80211_AMPDU_TX_STOP_CONT:
+	case IEEE80211_AMPDU_TX_STOP_FLUSH:
+	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
+		if (stream) {
+			if (stream->state == AMPDU_STREAM_ACTIVE) {
+				idx = stream->idx;
+				spin_unlock(&priv->stream_lock);
+				mwl8k_destroy_ba(hw, idx);
+				spin_lock(&priv->stream_lock);
+			}
+			mwl8k_remove_stream(hw, stream);
+		}
+		ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
+		break;
+	case IEEE80211_AMPDU_TX_OPERATIONAL:
+		BUG_ON(stream == NULL);
+		BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
+		spin_unlock(&priv->stream_lock);
+		rc = mwl8k_create_ba(hw, stream, buf_size, vif);
+		spin_lock(&priv->stream_lock);
+		if (!rc)
+			stream->state = AMPDU_STREAM_ACTIVE;
+		else {
+			idx = stream->idx;
+			spin_unlock(&priv->stream_lock);
+			mwl8k_destroy_ba(hw, idx);
+			spin_lock(&priv->stream_lock);
+			wiphy_debug(hw->wiphy,
+				"Failed adding stream for sta %pM tid %d\n",
+				addr, tid);
+			mwl8k_remove_stream(hw, stream);
+		}
+		break;
+
+	default:
+		rc = -ENOTSUPP;
+	}
+
+	spin_unlock(&priv->stream_lock);
+	return rc;
+}
+
+static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
+				struct ieee80211_vif *vif,
+				const u8 *mac_addr)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	u8 tmp;
+
+	if (!priv->ap_fw)
+		return;
+
+	/* clear all stats */
+	priv->channel_time = 0;
+	ioread32(priv->regs + BBU_RXRDY_CNT_REG);
+	ioread32(priv->regs + NOK_CCA_CNT_REG);
+	mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
+
+	priv->sw_scan_start = true;
+}
+
+static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
+				   struct ieee80211_vif *vif)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	u8 tmp;
+
+	if (!priv->ap_fw)
+		return;
+
+	priv->sw_scan_start = false;
+
+	/* clear all stats */
+	priv->channel_time = 0;
+	ioread32(priv->regs + BBU_RXRDY_CNT_REG);
+	ioread32(priv->regs + NOK_CCA_CNT_REG);
+	mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
+}
+
+static const struct ieee80211_ops mwl8k_ops = {
+	.tx			= mwl8k_tx,
+	.start			= mwl8k_start,
+	.stop			= mwl8k_stop,
+	.add_interface		= mwl8k_add_interface,
+	.remove_interface	= mwl8k_remove_interface,
+	.config			= mwl8k_config,
+	.bss_info_changed	= mwl8k_bss_info_changed,
+	.prepare_multicast	= mwl8k_prepare_multicast,
+	.configure_filter	= mwl8k_configure_filter,
+	.set_key                = mwl8k_set_key,
+	.set_rts_threshold	= mwl8k_set_rts_threshold,
+	.sta_add		= mwl8k_sta_add,
+	.sta_remove		= mwl8k_sta_remove,
+	.conf_tx		= mwl8k_conf_tx,
+	.get_stats		= mwl8k_get_stats,
+	.get_survey		= mwl8k_get_survey,
+	.ampdu_action		= mwl8k_ampdu_action,
+	.sw_scan_start		= mwl8k_sw_scan_start,
+	.sw_scan_complete	= mwl8k_sw_scan_complete,
+};
+
+static void mwl8k_finalize_join_worker(struct work_struct *work)
+{
+	struct mwl8k_priv *priv =
+		container_of(work, struct mwl8k_priv, finalize_join_worker);
+	struct sk_buff *skb = priv->beacon_skb;
+	struct ieee80211_mgmt *mgmt = (void *)skb->data;
+	int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
+	const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
+					 mgmt->u.beacon.variable, len);
+	int dtim_period = 1;
+
+	if (tim && tim[1] >= 2)
+		dtim_period = tim[3];
+
+	mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
+
+	dev_kfree_skb(skb);
+	priv->beacon_skb = NULL;
+}
+
+enum {
+	MWL8363 = 0,
+	MWL8687,
+	MWL8366,
+	MWL8764,
+};
+
+#define MWL8K_8366_AP_FW_API 3
+#define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
+#define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
+
+#define MWL8K_8764_AP_FW_API 1
+#define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
+#define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
+
+static struct mwl8k_device_info mwl8k_info_tbl[] = {
+	[MWL8363] = {
+		.part_name	= "88w8363",
+		.helper_image	= "mwl8k/helper_8363.fw",
+		.fw_image_sta	= "mwl8k/fmimage_8363.fw",
+	},
+	[MWL8687] = {
+		.part_name	= "88w8687",
+		.helper_image	= "mwl8k/helper_8687.fw",
+		.fw_image_sta	= "mwl8k/fmimage_8687.fw",
+	},
+	[MWL8366] = {
+		.part_name	= "88w8366",
+		.helper_image	= "mwl8k/helper_8366.fw",
+		.fw_image_sta	= "mwl8k/fmimage_8366.fw",
+		.fw_image_ap	= MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
+		.fw_api_ap	= MWL8K_8366_AP_FW_API,
+		.ap_rxd_ops	= &rxd_ap_ops,
+	},
+	[MWL8764] = {
+		.part_name	= "88w8764",
+		.fw_image_ap	= MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
+		.fw_api_ap	= MWL8K_8764_AP_FW_API,
+		.ap_rxd_ops	= &rxd_ap_ops,
+	},
+};
+
+MODULE_FIRMWARE("mwl8k/helper_8363.fw");
+MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
+MODULE_FIRMWARE("mwl8k/helper_8687.fw");
+MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
+MODULE_FIRMWARE("mwl8k/helper_8366.fw");
+MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
+MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
+
+static const struct pci_device_id mwl8k_pci_id_table[] = {
+	{ PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
+	{ PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
+	{ PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
+	{ PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
+	{ PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
+	{ PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
+	{ PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
+	{ PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
+	{ PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
+	{ PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
+	{ },
+};
+MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
+
+static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
+{
+	int rc;
+	printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
+	       "Trying alternative firmware %s\n", pci_name(priv->pdev),
+	       priv->fw_pref, priv->fw_alt);
+	rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
+	if (rc) {
+		printk(KERN_ERR "%s: Error requesting alt fw %s\n",
+		       pci_name(priv->pdev), priv->fw_alt);
+		return rc;
+	}
+	return 0;
+}
+
+static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
+static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
+{
+	struct mwl8k_priv *priv = context;
+	struct mwl8k_device_info *di = priv->device_info;
+	int rc;
+
+	switch (priv->fw_state) {
+	case FW_STATE_INIT:
+		if (!fw) {
+			printk(KERN_ERR "%s: Error requesting helper fw %s\n",
+			       pci_name(priv->pdev), di->helper_image);
+			goto fail;
+		}
+		priv->fw_helper = fw;
+		rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
+				      true);
+		if (rc && priv->fw_alt) {
+			rc = mwl8k_request_alt_fw(priv);
+			if (rc)
+				goto fail;
+			priv->fw_state = FW_STATE_LOADING_ALT;
+		} else if (rc)
+			goto fail;
+		else
+			priv->fw_state = FW_STATE_LOADING_PREF;
+		break;
+
+	case FW_STATE_LOADING_PREF:
+		if (!fw) {
+			if (priv->fw_alt) {
+				rc = mwl8k_request_alt_fw(priv);
+				if (rc)
+					goto fail;
+				priv->fw_state = FW_STATE_LOADING_ALT;
+			} else
+				goto fail;
+		} else {
+			priv->fw_ucode = fw;
+			rc = mwl8k_firmware_load_success(priv);
+			if (rc)
+				goto fail;
+			else
+				complete(&priv->firmware_loading_complete);
+		}
+		break;
+
+	case FW_STATE_LOADING_ALT:
+		if (!fw) {
+			printk(KERN_ERR "%s: Error requesting alt fw %s\n",
+			       pci_name(priv->pdev), di->helper_image);
+			goto fail;
+		}
+		priv->fw_ucode = fw;
+		rc = mwl8k_firmware_load_success(priv);
+		if (rc)
+			goto fail;
+		else
+			complete(&priv->firmware_loading_complete);
+		break;
+
+	default:
+		printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
+		       MWL8K_NAME, priv->fw_state);
+		BUG_ON(1);
+	}
+
+	return;
+
+fail:
+	priv->fw_state = FW_STATE_ERROR;
+	complete(&priv->firmware_loading_complete);
+	mwl8k_release_firmware(priv);
+	device_release_driver(&priv->pdev->dev);
+}
+
+#define MAX_RESTART_ATTEMPTS 1
+static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
+			       bool nowait)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+	int count = MAX_RESTART_ATTEMPTS;
+
+retry:
+	/* Reset firmware and hardware */
+	mwl8k_hw_reset(priv);
+
+	/* Ask userland hotplug daemon for the device firmware */
+	rc = mwl8k_request_firmware(priv, fw_image, nowait);
+	if (rc) {
+		wiphy_err(hw->wiphy, "Firmware files not found\n");
+		return rc;
+	}
+
+	if (nowait)
+		return rc;
+
+	/* Load firmware into hardware */
+	rc = mwl8k_load_firmware(hw);
+	if (rc)
+		wiphy_err(hw->wiphy, "Cannot start firmware\n");
+
+	/* Reclaim memory once firmware is successfully loaded */
+	mwl8k_release_firmware(priv);
+
+	if (rc && count) {
+		/* FW did not start successfully;
+		 * lets try one more time
+		 */
+		count--;
+		wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
+		msleep(20);
+		goto retry;
+	}
+
+	return rc;
+}
+
+static int mwl8k_init_txqs(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int rc = 0;
+	int i;
+
+	for (i = 0; i < mwl8k_tx_queues(priv); i++) {
+		rc = mwl8k_txq_init(hw, i);
+		if (rc)
+			break;
+		if (priv->ap_fw)
+			iowrite32(priv->txq[i].txd_dma,
+				  priv->sram + priv->txq_offset[i]);
+	}
+	return rc;
+}
+
+/* initialize hw after successfully loading a firmware image */
+static int mwl8k_probe_hw(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int rc = 0;
+	int i;
+
+	if (priv->ap_fw) {
+		priv->rxd_ops = priv->device_info->ap_rxd_ops;
+		if (priv->rxd_ops == NULL) {
+			wiphy_err(hw->wiphy,
+				  "Driver does not have AP firmware image support for this hardware\n");
+			rc = -ENOENT;
+			goto err_stop_firmware;
+		}
+	} else {
+		priv->rxd_ops = &rxd_sta_ops;
+	}
+
+	priv->sniffer_enabled = false;
+	priv->wmm_enabled = false;
+	priv->pending_tx_pkts = 0;
+	atomic_set(&priv->watchdog_event_pending, 0);
+
+	rc = mwl8k_rxq_init(hw, 0);
+	if (rc)
+		goto err_stop_firmware;
+	rxq_refill(hw, 0, INT_MAX);
+
+	/* For the sta firmware, we need to know the dma addresses of tx queues
+	 * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
+	 * prior to issuing this command.  But for the AP case, we learn the
+	 * total number of queues from the result CMD_GET_HW_SPEC, so for this
+	 * case we must initialize the tx queues after.
+	 */
+	priv->num_ampdu_queues = 0;
+	if (!priv->ap_fw) {
+		rc = mwl8k_init_txqs(hw);
+		if (rc)
+			goto err_free_queues;
+	}
+
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
+		  MWL8K_A2H_INT_BA_WATCHDOG,
+		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
+	iowrite32(MWL8K_A2H_INT_OPC_DONE,
+		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
+
+	rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
+			 IRQF_SHARED, MWL8K_NAME, hw);
+	if (rc) {
+		wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
+		goto err_free_queues;
+	}
+
+	/*
+	 * When hw restart is requested,
+	 * mac80211 will take care of clearing
+	 * the ampdu streams, so do not clear
+	 * the ampdu state here
+	 */
+	if (!priv->hw_restart_in_progress)
+		memset(priv->ampdu, 0, sizeof(priv->ampdu));
+
+	/*
+	 * Temporarily enable interrupts.  Initial firmware host
+	 * commands use interrupts and avoid polling.  Disable
+	 * interrupts when done.
+	 */
+	iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+
+	/* Get config data, mac addrs etc */
+	if (priv->ap_fw) {
+		rc = mwl8k_cmd_get_hw_spec_ap(hw);
+		if (!rc)
+			rc = mwl8k_init_txqs(hw);
+		if (!rc)
+			rc = mwl8k_cmd_set_hw_spec(hw);
+	} else {
+		rc = mwl8k_cmd_get_hw_spec_sta(hw);
+	}
+	if (rc) {
+		wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
+		goto err_free_irq;
+	}
+
+	/* Turn radio off */
+	rc = mwl8k_cmd_radio_disable(hw);
+	if (rc) {
+		wiphy_err(hw->wiphy, "Cannot disable\n");
+		goto err_free_irq;
+	}
+
+	/* Clear MAC address */
+	rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
+	if (rc) {
+		wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
+		goto err_free_irq;
+	}
+
+	/* Configure Antennas */
+	rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
+	if (rc)
+		wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
+	rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
+	if (rc)
+		wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
+
+
+	/* Disable interrupts */
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	free_irq(priv->pdev->irq, hw);
+
+	wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
+		   priv->device_info->part_name,
+		   priv->hw_rev, hw->wiphy->perm_addr,
+		   priv->ap_fw ? "AP" : "STA",
+		   (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
+		   (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
+
+	return 0;
+
+err_free_irq:
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	free_irq(priv->pdev->irq, hw);
+
+err_free_queues:
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		mwl8k_txq_deinit(hw, i);
+	mwl8k_rxq_deinit(hw, 0);
+
+err_stop_firmware:
+	mwl8k_hw_reset(priv);
+
+	return rc;
+}
+
+/*
+ * invoke mwl8k_reload_firmware to change the firmware image after the device
+ * has already been registered
+ */
+static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
+{
+	int i, rc = 0;
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *vif, *tmp_vif;
+
+	mwl8k_stop(hw);
+	mwl8k_rxq_deinit(hw, 0);
+
+	/*
+	 * All the existing interfaces are re-added by the ieee80211_reconfig;
+	 * which means driver should remove existing interfaces before calling
+	 * ieee80211_restart_hw
+	 */
+	if (priv->hw_restart_in_progress)
+		list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
+			mwl8k_remove_vif(priv, vif);
+
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		mwl8k_txq_deinit(hw, i);
+
+	rc = mwl8k_init_firmware(hw, fw_image, false);
+	if (rc)
+		goto fail;
+
+	rc = mwl8k_probe_hw(hw);
+	if (rc)
+		goto fail;
+
+	if (priv->hw_restart_in_progress)
+		return rc;
+
+	rc = mwl8k_start(hw);
+	if (rc)
+		goto fail;
+
+	rc = mwl8k_config(hw, ~0);
+	if (rc)
+		goto fail;
+
+	for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
+		rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
+		if (rc)
+			goto fail;
+	}
+
+	return rc;
+
+fail:
+	printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
+	return rc;
+}
+
+static const struct ieee80211_iface_limit ap_if_limits[] = {
+	{ .max = 8,	.types = BIT(NL80211_IFTYPE_AP) },
+	{ .max = 1,	.types = BIT(NL80211_IFTYPE_STATION) },
+};
+
+static const struct ieee80211_iface_combination ap_if_comb = {
+	.limits = ap_if_limits,
+	.n_limits = ARRAY_SIZE(ap_if_limits),
+	.max_interfaces = 8,
+	.num_different_channels = 1,
+};
+
+
+static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
+{
+	struct ieee80211_hw *hw = priv->hw;
+	int i, rc;
+
+	rc = mwl8k_load_firmware(hw);
+	mwl8k_release_firmware(priv);
+	if (rc) {
+		wiphy_err(hw->wiphy, "Cannot start firmware\n");
+		return rc;
+	}
+
+	/*
+	 * Extra headroom is the size of the required DMA header
+	 * minus the size of the smallest 802.11 frame (CTS frame).
+	 */
+	hw->extra_tx_headroom =
+		sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
+
+	hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
+
+	hw->queues = MWL8K_TX_WMM_QUEUES;
+
+	/* Set rssi values to dBm */
+	ieee80211_hw_set(hw, SIGNAL_DBM);
+	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
+
+	/*
+	 * Ask mac80211 to not to trigger PS mode
+	 * based on PM bit of incoming frames.
+	 */
+	if (priv->ap_fw)
+		ieee80211_hw_set(hw, AP_LINK_PS);
+
+	hw->vif_data_size = sizeof(struct mwl8k_vif);
+	hw->sta_data_size = sizeof(struct mwl8k_sta);
+
+	priv->macids_used = 0;
+	INIT_LIST_HEAD(&priv->vif_list);
+
+	/* Set default radio state and preamble */
+	priv->radio_on = false;
+	priv->radio_short_preamble = false;
+
+	/* Finalize join worker */
+	INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
+	/* Handle watchdog ba events */
+	INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
+	/* To reload the firmware if it crashes */
+	INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
+
+	/* TX reclaim and RX tasklets.  */
+	tasklet_setup(&priv->poll_tx_task, mwl8k_tx_poll);
+	tasklet_disable(&priv->poll_tx_task);
+	tasklet_setup(&priv->poll_rx_task, mwl8k_rx_poll);
+	tasklet_disable(&priv->poll_rx_task);
+
+	/* Power management cookie */
+	priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
+	if (priv->cookie == NULL)
+		return -ENOMEM;
+
+	mutex_init(&priv->fw_mutex);
+	priv->fw_mutex_owner = NULL;
+	priv->fw_mutex_depth = 0;
+	priv->hostcmd_wait = NULL;
+
+	spin_lock_init(&priv->tx_lock);
+
+	spin_lock_init(&priv->stream_lock);
+
+	priv->tx_wait = NULL;
+
+	rc = mwl8k_probe_hw(hw);
+	if (rc)
+		goto err_free_cookie;
+
+	hw->wiphy->interface_modes = 0;
+
+	if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
+		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
+		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
+		hw->wiphy->iface_combinations = &ap_if_comb;
+		hw->wiphy->n_iface_combinations = 1;
+	}
+
+	if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
+		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
+
+	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
+
+	rc = ieee80211_register_hw(hw);
+	if (rc) {
+		wiphy_err(hw->wiphy, "Cannot register device\n");
+		goto err_unprobe_hw;
+	}
+
+	return 0;
+
+err_unprobe_hw:
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		mwl8k_txq_deinit(hw, i);
+	mwl8k_rxq_deinit(hw, 0);
+
+err_free_cookie:
+	if (priv->cookie != NULL)
+		pci_free_consistent(priv->pdev, 4,
+				priv->cookie, priv->cookie_dma);
+
+	return rc;
+}
+static int mwl8k_probe(struct pci_dev *pdev,
+				 const struct pci_device_id *id)
+{
+	static int printed_version;
+	struct ieee80211_hw *hw;
+	struct mwl8k_priv *priv;
+	struct mwl8k_device_info *di;
+	int rc;
+
+	if (!printed_version) {
+		printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
+		printed_version = 1;
+	}
+
+
+	rc = pci_enable_device(pdev);
+	if (rc) {
+		printk(KERN_ERR "%s: Cannot enable new PCI device\n",
+		       MWL8K_NAME);
+		return rc;
+	}
+
+	rc = pci_request_regions(pdev, MWL8K_NAME);
+	if (rc) {
+		printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
+		       MWL8K_NAME);
+		goto err_disable_device;
+	}
+
+	pci_set_master(pdev);
+
+
+	hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
+	if (hw == NULL) {
+		printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
+		rc = -ENOMEM;
+		goto err_free_reg;
+	}
+
+	SET_IEEE80211_DEV(hw, &pdev->dev);
+	pci_set_drvdata(pdev, hw);
+
+	priv = hw->priv;
+	priv->hw = hw;
+	priv->pdev = pdev;
+	priv->device_info = &mwl8k_info_tbl[id->driver_data];
+
+	if (id->driver_data == MWL8764)
+		priv->is_8764 = true;
+
+	priv->sram = pci_iomap(pdev, 0, 0x10000);
+	if (priv->sram == NULL) {
+		wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
+		rc = -EIO;
+		goto err_iounmap;
+	}
+
+	/*
+	 * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
+	 * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
+	 */
+	priv->regs = pci_iomap(pdev, 1, 0x10000);
+	if (priv->regs == NULL) {
+		priv->regs = pci_iomap(pdev, 2, 0x10000);
+		if (priv->regs == NULL) {
+			wiphy_err(hw->wiphy, "Cannot map device registers\n");
+			rc = -EIO;
+			goto err_iounmap;
+		}
+	}
+
+	/*
+	 * Choose the initial fw image depending on user input.  If a second
+	 * image is available, make it the alternative image that will be
+	 * loaded if the first one fails.
+	 */
+	init_completion(&priv->firmware_loading_complete);
+	di = priv->device_info;
+	if (ap_mode_default && di->fw_image_ap) {
+		priv->fw_pref = di->fw_image_ap;
+		priv->fw_alt = di->fw_image_sta;
+	} else if (!ap_mode_default && di->fw_image_sta) {
+		priv->fw_pref = di->fw_image_sta;
+		priv->fw_alt = di->fw_image_ap;
+	} else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
+		printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
+		priv->fw_pref = di->fw_image_sta;
+	} else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
+		printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
+		priv->fw_pref = di->fw_image_ap;
+	}
+	rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
+	if (rc)
+		goto err_stop_firmware;
+
+	priv->hw_restart_in_progress = false;
+
+	priv->running_bsses = 0;
+
+	return rc;
+
+err_stop_firmware:
+	mwl8k_hw_reset(priv);
+
+err_iounmap:
+	if (priv->regs != NULL)
+		pci_iounmap(pdev, priv->regs);
+
+	if (priv->sram != NULL)
+		pci_iounmap(pdev, priv->sram);
+
+	ieee80211_free_hw(hw);
+
+err_free_reg:
+	pci_release_regions(pdev);
+
+err_disable_device:
+	pci_disable_device(pdev);
+
+	return rc;
+}
+
+static void mwl8k_remove(struct pci_dev *pdev)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+	struct mwl8k_priv *priv;
+	int i;
+
+	if (hw == NULL)
+		return;
+	priv = hw->priv;
+
+	wait_for_completion(&priv->firmware_loading_complete);
+
+	if (priv->fw_state == FW_STATE_ERROR) {
+		mwl8k_hw_reset(priv);
+		goto unmap;
+	}
+
+	ieee80211_stop_queues(hw);
+
+	ieee80211_unregister_hw(hw);
+
+	/* Remove TX reclaim and RX tasklets.  */
+	tasklet_kill(&priv->poll_tx_task);
+	tasklet_kill(&priv->poll_rx_task);
+
+	/* Stop hardware */
+	mwl8k_hw_reset(priv);
+
+	/* Return all skbs to mac80211 */
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
+
+	for (i = 0; i < mwl8k_tx_queues(priv); i++)
+		mwl8k_txq_deinit(hw, i);
+
+	mwl8k_rxq_deinit(hw, 0);
+
+	pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
+
+unmap:
+	pci_iounmap(pdev, priv->regs);
+	pci_iounmap(pdev, priv->sram);
+	ieee80211_free_hw(hw);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+}
+
+static struct pci_driver mwl8k_driver = {
+	.name		= MWL8K_NAME,
+	.id_table	= mwl8k_pci_id_table,
+	.probe		= mwl8k_probe,
+	.remove		= mwl8k_remove,
+};
+
+module_pci_driver(mwl8k_driver);
+
+MODULE_DESCRIPTION(MWL8K_DESC);
+MODULE_VERSION(MWL8K_VERSION);
+MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
+MODULE_LICENSE("GPL");