mwl8k: Marvell TOPDOG wireless driver

Add a driver for Marvell 88w8xxx TOPDOG PCI/PCIe wireless parts.
This initial version supports the 88w8687 802.11b/g PCIe part on
channels 1-11, and only STA mode is currently implemented.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 3800 insertions, 0 deletions

diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig
index 1294175cab20..612fffe100a6 100644
--- a/drivers/net/wireless/Kconfig
+++ b/drivers/net/wireless/Kconfig
@@ -473,6 +473,15 @@ config MAC80211_HWSIM
 	  To compile this driver as a module, choose M here: the module will be
 	  called mac80211_hwsim.  If unsure, say N.
 
+config MWL8K
+	tristate "Marvell 88W8xxx PCI/PCIe Wireless support"
+	depends on MAC80211 && PCI && WLAN_80211 && EXPERIMENTAL
+	---help---
+	  This driver supports Marvell TOPDOG 802.11 wireless cards.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mwl8k.  If unsure, say N.
+
 source "drivers/net/wireless/p54/Kconfig"
 source "drivers/net/wireless/ath5k/Kconfig"
 source "drivers/net/wireless/ath9k/Kconfig"
diff --git a/drivers/net/wireless/Makefile b/drivers/net/wireless/Makefile
index e2574cafe051..d780487c420f 100644
--- a/drivers/net/wireless/Makefile
+++ b/drivers/net/wireless/Makefile
@@ -48,6 +48,8 @@ obj-$(CONFIG_LIBERTAS_THINFIRM)	+= libertas_tf/
 
 obj-$(CONFIG_ADM8211)	+= adm8211.o
 
+obj-$(CONFIG_MWL8K)	+= mwl8k.o
+
 obj-$(CONFIG_IWLWIFI)	+= iwlwifi/
 obj-$(CONFIG_RT2X00)	+= rt2x00/
 
diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
new file mode 100644
index 000000000000..57a0268d1bae
--- /dev/null
+++ b/drivers/net/wireless/mwl8k.c
@@ -0,0 +1,3789 @@
+/*
+ * drivers/net/wireless/mwl8k.c driver for Marvell TOPDOG 802.11 Wireless cards
+ *
+ * Copyright (C) 2008 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/init.h>
+#include <linux/module.h>
+#include <linux/kernel.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 <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	"0.9.1"
+
+MODULE_DESCRIPTION(MWL8K_DESC);
+MODULE_VERSION(MWL8K_VERSION);
+MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
+MODULE_LICENSE("GPL");
+
+static DEFINE_PCI_DEVICE_TABLE(mwl8k_table) = {
+	{ PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = 8687, },
+	{ PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = 8687, },
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, mwl8k_table);
+
+#define IEEE80211_ADDR_LEN			ETH_ALEN
+
+/* 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_PS			(1 << 2)
+#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_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)
+
+#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)
+
+/* WME stream classes */
+#define WME_AC_BE	0		/* best effort */
+#define WME_AC_BK	1		/* background */
+#define WME_AC_VI	2		/* video */
+#define WME_AC_VO	3		/* voice */
+
+#define MWL8K_RX_QUEUES		1
+#define MWL8K_TX_QUEUES		4
+
+struct mwl8k_rx_queue {
+	int rx_desc_count;
+
+	/* hw receives here */
+	int rx_head;
+
+	/* refill descs here */
+	int rx_tail;
+
+	struct mwl8k_rx_desc *rx_desc_area;
+	dma_addr_t rx_desc_dma;
+	struct sk_buff **rx_skb;
+};
+
+struct mwl8k_skb {
+	/*
+	 * The DMA engine requires a modification to the payload.
+	 * If the skbuff is shared/cloned, it needs to be unshared.
+	 * This method is used to ensure the stack always gets back
+	 * the skbuff it sent for transmission.
+	 */
+	struct sk_buff *clone;
+	struct sk_buff *skb;
+};
+
+struct mwl8k_tx_queue {
+	/* hw transmits here */
+	int tx_head;
+
+	/* sw appends here */
+	int tx_tail;
+
+	struct ieee80211_tx_queue_stats tx_stats;
+	struct mwl8k_tx_desc *tx_desc_area;
+	dma_addr_t tx_desc_dma;
+	struct mwl8k_skb *tx_skb;
+};
+
+/* Pointers to the firmware data and meta information about it.  */
+struct mwl8k_firmware {
+	/* Microcode */
+	struct firmware *ucode;
+
+	/* Boot helper code */
+	struct firmware *helper;
+};
+
+struct mwl8k_priv {
+	void __iomem *regs;
+	struct ieee80211_hw *hw;
+
+	struct pci_dev *pdev;
+	u8 name[16];
+	/* firmware access lock */
+	spinlock_t fw_lock;
+
+	/* firmware files and meta data */
+	struct mwl8k_firmware fw;
+	u32 part_num;
+
+	/* lock held over TX and TX reap */
+	spinlock_t tx_lock;
+	u32 int_mask;
+
+	struct ieee80211_vif *vif;
+	struct list_head vif_list;
+
+	struct ieee80211_channel *current_channel;
+
+	/* power management status cookie from firmware */
+	u32 *cookie;
+	dma_addr_t cookie_dma;
+
+	u16 num_mcaddrs;
+	u16 region_code;
+	u8 hw_rev;
+	__le32 fw_rev;
+	u32 wep_enabled;
+
+	/*
+	 * 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_TX_QUEUES];
+
+	/* PHY parameters */
+	struct ieee80211_supported_band band;
+	struct ieee80211_channel channels[14];
+	struct ieee80211_rate rates[12];
+
+	/* RF preamble: Short, Long or Auto */
+	u8	radio_preamble;
+	u8	radio_state;
+
+	/* WMM MODE 1 for enabled; 0 for disabled */
+	bool wmm_mode;
+
+	/* Set if PHY config is in progress */
+	bool inconfig;
+
+	/* XXX need to convert this to handle multiple interfaces */
+	bool capture_beacon;
+	u8 capture_bssid[IEEE80211_ADDR_LEN];
+	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 reclaim TX descriptors and buffers after tx */
+	struct tasklet_struct tx_reclaim_task;
+
+	/* Work thread to serialize configuration requests */
+	struct workqueue_struct *config_wq;
+	struct completion *hostcmd_wait;
+	struct completion *tx_wait;
+};
+
+/* Per interface specific private data */
+struct mwl8k_vif {
+	struct list_head node;
+
+	/* backpointer to parent config block */
+	struct mwl8k_priv *priv;
+
+	/* BSS config of AP or IBSS from mac80211*/
+	struct ieee80211_bss_conf bss_info;
+
+	/* BSSID of AP or IBSS */
+	u8	bssid[IEEE80211_ADDR_LEN];
+	u8	mac_addr[IEEE80211_ADDR_LEN];
+
+	/*
+	 * Subset of supported legacy rates.
+	 * Intersection of AP and STA supported rates.
+	 */
+	struct ieee80211_rate legacy_rates[12];
+
+	/* number of supported legacy rates */
+	u8	legacy_nrates;
+
+	/* Number of supported MCS rates. Work in progress */
+	u8	mcs_nrates;
+
+	 /* Index into station database.Returned by update_sta_db call */
+	u8	peer_id;
+
+	/* Non AMPDU sequence number assigned by driver */
+	u16	seqno;
+
+	/* Note:There is no channel info,
+	 * refer to the master channel info in priv
+	 */
+};
+
+#define MWL8K_VIF(_vif) (struct mwl8k_vif *)(&((_vif)->drv_priv))
+
+static const struct ieee80211_channel mwl8k_channels[] = {
+	{ .center_freq = 2412, .hw_value = 1, },
+	{ .center_freq = 2417, .hw_value = 2, },
+	{ .center_freq = 2422, .hw_value = 3, },
+	{ .center_freq = 2427, .hw_value = 4, },
+	{ .center_freq = 2432, .hw_value = 5, },
+	{ .center_freq = 2437, .hw_value = 6, },
+	{ .center_freq = 2442, .hw_value = 7, },
+	{ .center_freq = 2447, .hw_value = 8, },
+	{ .center_freq = 2452, .hw_value = 9, },
+	{ .center_freq = 2457, .hw_value = 10, },
+	{ .center_freq = 2462, .hw_value = 11, },
+};
+
+static const struct ieee80211_rate mwl8k_rates[] = {
+	{ .bitrate = 10, .hw_value = 2, },
+	{ .bitrate = 20, .hw_value = 4, },
+	{ .bitrate = 55, .hw_value = 11, },
+	{ .bitrate = 60, .hw_value = 12, },
+	{ .bitrate = 90, .hw_value = 18, },
+	{ .bitrate = 110, .hw_value = 22, },
+	{ .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, },
+};
+
+/* Radio settings */
+#define MWL8K_RADIO_FORCE		0x2
+#define MWL8K_RADIO_ENABLE		0x1
+#define MWL8K_RADIO_DISABLE		0x0
+#define MWL8K_RADIO_AUTO_PREAMBLE	0x0005
+#define MWL8K_RADIO_SHORT_PREAMBLE	0x0003
+#define MWL8K_RADIO_LONG_PREAMBLE	0x0001
+
+/* WMM */
+#define MWL8K_WMM_ENABLE		1
+#define MWL8K_WMM_DISABLE		0
+
+#define MWL8K_RADIO_DEFAULT_PREAMBLE	MWL8K_RADIO_LONG_PREAMBLE
+
+/* Slot time */
+
+/* Short Slot: 9us slot time */
+#define MWL8K_SHORT_SLOTTIME		1
+
+/* Long slot: 20us slot time */
+#define MWL8K_LONG_SLOTTIME		0
+
+/* Set or get info from Firmware */
+#define MWL8K_CMD_SET			0x0001
+#define MWL8K_CMD_GET			0x0000
+
+/* Firmware command codes */
+#define MWL8K_CMD_CODE_DNLD		0x0001
+#define MWL8K_CMD_GET_HW_SPEC		0x0003
+#define MWL8K_CMD_MAC_MULTICAST_ADR	0x0010
+#define MWL8K_CMD_GET_STAT		0x0014
+#define MWL8K_CMD_RADIO_CONTROL		0x001C
+#define MWL8K_CMD_RF_TX_POWER		0x001E
+#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_SLOT		0x0114
+#define MWL8K_CMD_MIMO_CONFIG		0x0125
+#define MWL8K_CMD_ENABLE_SNIFFER	0x0150
+#define MWL8K_CMD_SET_WMM_MODE		0x0123
+#define MWL8K_CMD_SET_EDCA_PARAMS	0x0115
+#define MWL8K_CMD_SET_FINALIZE_JOIN	0x0111
+#define MWL8K_CMD_UPDATE_STADB		0x1123
+#define MWL8K_CMD_SET_RATEADAPT_MODE	0x0203
+#define MWL8K_CMD_SET_LINKADAPT_MODE	0x0129
+#define MWL8K_CMD_SET_AID		0x010d
+#define MWL8K_CMD_SET_RATE		0x0110
+#define MWL8K_CMD_USE_FIXED_RATE	0x0126
+#define MWL8K_CMD_RTS_THRESHOLD		0x0113
+#define MWL8K_CMD_ENCRYPTION		0x1122
+
+static const char *mwl8k_cmd_name(u16 cmd, char *buf, int bufsize)
+{
+#define MWL8K_CMDNAME(x)	case MWL8K_CMD_##x: do {\
+					snprintf(buf, bufsize, "%s", #x);\
+					return buf;\
+					} while (0)
+	switch (cmd & (~0x8000)) {
+		MWL8K_CMDNAME(CODE_DNLD);
+		MWL8K_CMDNAME(GET_HW_SPEC);
+		MWL8K_CMDNAME(MAC_MULTICAST_ADR);
+		MWL8K_CMDNAME(GET_STAT);
+		MWL8K_CMDNAME(RADIO_CONTROL);
+		MWL8K_CMDNAME(RF_TX_POWER);
+		MWL8K_CMDNAME(SET_PRE_SCAN);
+		MWL8K_CMDNAME(SET_POST_SCAN);
+		MWL8K_CMDNAME(SET_RF_CHANNEL);
+		MWL8K_CMDNAME(SET_SLOT);
+		MWL8K_CMDNAME(MIMO_CONFIG);
+		MWL8K_CMDNAME(ENABLE_SNIFFER);
+		MWL8K_CMDNAME(SET_WMM_MODE);
+		MWL8K_CMDNAME(SET_EDCA_PARAMS);
+		MWL8K_CMDNAME(SET_FINALIZE_JOIN);
+		MWL8K_CMDNAME(UPDATE_STADB);
+		MWL8K_CMDNAME(SET_RATEADAPT_MODE);
+		MWL8K_CMDNAME(SET_LINKADAPT_MODE);
+		MWL8K_CMDNAME(SET_AID);
+		MWL8K_CMDNAME(SET_RATE);
+		MWL8K_CMDNAME(USE_FIXED_RATE);
+		MWL8K_CMDNAME(RTS_THRESHOLD);
+		MWL8K_CMDNAME(ENCRYPTION);
+	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(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);
+}
+
+/* Request fw image */
+static int mwl8k_request_fw(struct mwl8k_priv *priv,
+				const char *fname, struct firmware **fw)
+{
+	/* release current image */
+	if (*fw != NULL)
+		mwl8k_release_fw(fw);
+
+	return request_firmware((const struct firmware **)fw,
+						fname, &priv->pdev->dev);
+}
+
+static int mwl8k_request_firmware(struct mwl8k_priv *priv, u32 part_num)
+{
+	u8 filename[64];
+	int rc;
+
+	priv->part_num = part_num;
+
+	snprintf(filename, sizeof(filename),
+		 "mwl8k/helper_%u.fw", priv->part_num);
+
+	rc = mwl8k_request_fw(priv, filename, &priv->fw.helper);
+	if (rc) {
+		printk(KERN_ERR
+			"%s Error requesting helper firmware file %s\n",
+			pci_name(priv->pdev), filename);
+		return rc;
+	}
+
+	snprintf(filename, sizeof(filename),
+		 "mwl8k/fmimage_%u.fw", priv->part_num);
+
+	rc = mwl8k_request_fw(priv, filename, &priv->fw.ucode);
+	if (rc) {
+		printk(KERN_ERR "%s Error requesting firmware file %s\n",
+					pci_name(priv->pdev), filename);
+		mwl8k_release_fw(&priv->fw.helper);
+		return rc;
+	}
+
+	return 0;
+}
+
+struct mwl8k_cmd_pkt {
+	__le16	code;
+	__le16	length;
+	__le16	seq_num;
+	__le16	result;
+	char	payload[0];
+} __attribute__((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 rc;
+	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);
+
+	rc = -ETIMEDOUT;
+	loops = 1000;
+	do {
+		u32 int_code;
+
+		int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
+		if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
+			iowrite32(0, regs + MWL8K_HIU_INT_CODE);
+			rc = 0;
+			break;
+		}
+
+		udelay(1);
+	} while (--loops);
+
+	pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
+
+	/*
+	 * Clear 'command done' interrupt bit.
+	 */
+	loops = 1000;
+	do {
+		u32 status;
+
+		status = ioread32(priv->regs +
+				MWL8K_HIU_A2H_INTERRUPT_STATUS);
+		if (status & MWL8K_A2H_INT_OPC_DONE) {
+			iowrite32(~MWL8K_A2H_INT_OPC_DONE,
+				priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+			ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+			break;
+		}
+
+		udelay(1);
+	} while (--loops);
+
+	return rc;
+}
+
+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->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 mwl8k_priv *priv)
+{
+	int loops, rc;
+
+	const u8 *ucode = priv->fw.ucode->data;
+	size_t ucode_len = priv->fw.ucode->size;
+	const u8 *helper = priv->fw.helper->data;
+	size_t helper_len = priv->fw.helper->size;
+
+	if (!memcmp(ucode, "\x01\x00\x00\x00", 4)) {
+		rc = mwl8k_load_fw_image(priv, helper, helper_len);
+		if (rc) {
+			printk(KERN_ERR "%s: unable to load firmware "
+				"helper image\n", pci_name(priv->pdev));
+			return rc;
+		}
+		msleep(1);
+
+		rc = mwl8k_feed_fw_image(priv, ucode, ucode_len);
+	} else {
+		rc = mwl8k_load_fw_image(priv, ucode, ucode_len);
+	}
+
+	if (rc) {
+		printk(KERN_ERR "%s: unable to load firmware data\n",
+			pci_name(priv->pdev));
+		return rc;
+	}
+
+	iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
+	msleep(1);
+
+	loops = 200000;
+	do {
+		if (ioread32(priv->regs + MWL8K_HIU_INT_CODE)
+						== MWL8K_FWSTA_READY)
+			break;
+		udelay(1);
+	} while (--loops);
+
+	return loops ? 0 : -ETIMEDOUT;
+}
+
+
+/*
+ * Defines shared between transmission and reception.
+ */
+/* HT control fields for firmware */
+struct ewc_ht_info {
+	__le16	control1;
+	__le16	control2;
+	__le16	control3;
+} __attribute__((packed));
+
+/* Firmware Station database operations */
+#define MWL8K_STA_DB_ADD_ENTRY		0
+#define MWL8K_STA_DB_MODIFY_ENTRY	1
+#define MWL8K_STA_DB_DEL_ENTRY		2
+#define MWL8K_STA_DB_FLUSH		3
+
+/* Peer Entry flags - used to define the type of the peer node */
+#define MWL8K_PEER_TYPE_ACCESSPOINT	2
+#define MWL8K_PEER_TYPE_ADHOC_STATION	4
+
+#define MWL8K_IEEE_LEGACY_DATA_RATES	12
+#define MWL8K_MCS_BITMAP_SIZE		16
+#define pad_size			16
+
+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[MWL8K_IEEE_LEGACY_DATA_RATES];
+
+	/* HT rate table. Intersection of our rates and peer rates.  */
+	__u8	ht_rates[MWL8K_MCS_BITMAP_SIZE];
+	__u8	pad[pad_size];
+
+	/* If set, interoperability mode, no proprietary extensions.  */
+	__u8	interop;
+	__u8	pad2;
+	__u8	station_id;
+	__le16	amsdu_enabled;
+} __attribute__((packed));
+
+/* Inline functions to manipulate QoS field in data descriptor.  */
+static inline u16 mwl8k_qos_setbit_tid(u16 qos, u8 tid)
+{
+	u16 val_mask = 0x000f;
+	u16 qos_mask = ~val_mask;
+
+	/* TID bits 0-3 */
+	return (qos & qos_mask) | (tid & val_mask);
+}
+
+static inline u16 mwl8k_qos_setbit_eosp(u16 qos)
+{
+	u16 val_mask = 1 << 4;
+
+	/* End of Service Period Bit 4 */
+	return qos | val_mask;
+}
+
+static inline u16 mwl8k_qos_setbit_ack(u16 qos, u8 ack_policy)
+{
+	u16 val_mask = 0x3;
+	u8	shift = 5;
+	u16 qos_mask = ~(val_mask << shift);
+
+	/* Ack Policy Bit 5-6 */
+	return (qos & qos_mask) | ((ack_policy & val_mask) << shift);
+}
+
+static inline u16 mwl8k_qos_setbit_amsdu(u16 qos)
+{
+	u16 val_mask = 1 << 7;
+
+	/* AMSDU present Bit 7 */
+	return qos | val_mask;
+}
+
+static inline u16 mwl8k_qos_setbit_qlen(u16 qos, u8 len)
+{
+	u16 val_mask = 0xff;
+	u8	shift = 8;
+	u16 qos_mask = ~(val_mask << shift);
+
+	/* Queue Length Bits 8-15 */
+	return (qos & qos_mask) | ((len & val_mask) << shift);
+}
+
+/* DMA header used by firmware and hardware.  */
+struct mwl8k_dma_data {
+	__le16 fwlen;
+	struct ieee80211_hdr wh;
+} __attribute__((packed));
+
+/* Routines to add/remove DMA header from skb.  */
+static inline int mwl8k_remove_dma_header(struct sk_buff *skb)
+{
+	struct mwl8k_dma_data *tr = (struct mwl8k_dma_data *)(skb->data);
+	void *dst, *src = &tr->wh;
+	__le16 fc = tr->wh.frame_control;
+	int hdrlen = ieee80211_hdrlen(fc);
+	u16 space = sizeof(struct mwl8k_dma_data) - hdrlen;
+
+	dst = (void *)tr + space;
+	if (dst != src) {
+		memmove(dst, src, hdrlen);
+		skb_pull(skb, space);
+	}
+
+	return 0;
+}
+
+static inline struct sk_buff *mwl8k_add_dma_header(struct sk_buff *skb)
+{
+	struct ieee80211_hdr *wh;
+	u32 hdrlen, pktlen;
+	struct mwl8k_dma_data *tr;
+
+	wh = (struct ieee80211_hdr *)skb->data;
+	hdrlen = ieee80211_hdrlen(wh->frame_control);
+	pktlen = skb->len;
+
+	/*
+	 * Copy up/down the 802.11 header; the firmware requires
+	 * we present a 2-byte payload length followed by a
+	 * 4-address header (w/o QoS), followed (optionally) by
+	 * any WEP/ExtIV header (but only filled in for CCMP).
+	 */
+	if (hdrlen != sizeof(struct mwl8k_dma_data))
+		skb_push(skb, sizeof(struct mwl8k_dma_data) - hdrlen);
+
+	tr = (struct mwl8k_dma_data *)skb->data;
+	if (wh != &tr->wh)
+		memmove(&tr->wh, wh, hdrlen);
+
+	/* Clear addr4 */
+	memset(tr->wh.addr4, 0, IEEE80211_ADDR_LEN);
+
+	/*
+	 * 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(pktlen - hdrlen);
+
+	return skb;
+}
+
+
+/*
+ * Packet reception.
+ */
+#define MWL8K_RX_CTRL_KEY_INDEX_MASK	0x30
+#define MWL8K_RX_CTRL_OWNED_BY_HOST	0x02
+#define MWL8K_RX_CTRL_AMPDU		0x01
+
+struct mwl8k_rx_desc {
+	__le16 pkt_len;
+	__u8 link_quality;
+	__u8 noise_level;
+	__le32 pkt_phys_addr;
+	__le32 next_rx_desc_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];
+} __attribute__((packed));
+
+#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->rx_desc_count = 0;
+	rxq->rx_head = 0;
+	rxq->rx_tail = 0;
+
+	size = MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc);
+
+	rxq->rx_desc_area =
+		pci_alloc_consistent(priv->pdev, size, &rxq->rx_desc_dma);
+	if (rxq->rx_desc_area == NULL) {
+		printk(KERN_ERR "%s: failed to alloc RX descriptors\n",
+		       priv->name);
+		return -ENOMEM;
+	}
+	memset(rxq->rx_desc_area, 0, size);
+
+	rxq->rx_skb = kmalloc(MWL8K_RX_DESCS *
+				sizeof(*rxq->rx_skb), GFP_KERNEL);
+	if (rxq->rx_skb == NULL) {
+		printk(KERN_ERR "%s: failed to alloc RX skbuff list\n",
+			priv->name);
+		pci_free_consistent(priv->pdev, size,
+				    rxq->rx_desc_area, rxq->rx_desc_dma);
+		return -ENOMEM;
+	}
+	memset(rxq->rx_skb, 0, MWL8K_RX_DESCS * sizeof(*rxq->rx_skb));
+
+	for (i = 0; i < MWL8K_RX_DESCS; i++) {
+		struct mwl8k_rx_desc *rx_desc;
+		int nexti;
+
+		rx_desc = rxq->rx_desc_area + i;
+		nexti = (i + 1) % MWL8K_RX_DESCS;
+
+		rx_desc->next_rx_desc_phys_addr =
+			cpu_to_le32(rxq->rx_desc_dma
+						+ nexti * sizeof(*rx_desc));
+		rx_desc->rx_ctrl =
+			cpu_to_le32(MWL8K_RX_CTRL_OWNED_BY_HOST);
+	}
+
+	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->rx_desc_count < MWL8K_RX_DESCS && limit--) {
+		struct sk_buff *skb;
+		int rx;
+
+		skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
+		if (skb == NULL)
+			break;
+
+		rxq->rx_desc_count++;
+
+		rx = rxq->rx_tail;
+		rxq->rx_tail = (rx + 1) % MWL8K_RX_DESCS;
+
+		rxq->rx_desc_area[rx].pkt_phys_addr =
+			cpu_to_le32(pci_map_single(priv->pdev, skb->data,
+					MWL8K_RX_MAXSZ, DMA_FROM_DEVICE));
+
+		rxq->rx_desc_area[rx].pkt_len = cpu_to_le16(MWL8K_RX_MAXSZ);
+		rxq->rx_skb[rx] = skb;
+		wmb();
+		rxq->rx_desc_area[rx].rx_ctrl = 0;
+
+		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;
+
+	for (i = 0; i < MWL8K_RX_DESCS; i++) {
+		if (rxq->rx_skb[i] != NULL) {
+			unsigned long addr;
+
+			addr = le32_to_cpu(rxq->rx_desc_area[i].pkt_phys_addr);
+			pci_unmap_single(priv->pdev, addr, MWL8K_RX_MAXSZ,
+					 PCI_DMA_FROMDEVICE);
+			kfree_skb(rxq->rx_skb[i]);
+			rxq->rx_skb[i] = NULL;
+		}
+	}
+
+	kfree(rxq->rx_skb);
+	rxq->rx_skb = NULL;
+
+	pci_free_consistent(priv->pdev,
+			    MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc),
+			    rxq->rx_desc_area, rxq->rx_desc_dma);
+	rxq->rx_desc_area = 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) &&
+		!compare_ether_addr(wh->addr3, priv->capture_bssid);
+}
+
+static inline void mwl8k_save_beacon(struct mwl8k_priv *priv,
+							struct sk_buff *skb)
+{
+	priv->capture_beacon = false;
+	memset(priv->capture_bssid, 0, IEEE80211_ADDR_LEN);
+
+	/*
+	 * 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)
+		queue_work(priv->config_wq,
+				&priv->finalize_join_worker);
+}
+
+static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_rx_queue *rxq = priv->rxq + index;
+	int processed;
+
+	processed = 0;
+	while (rxq->rx_desc_count && limit--) {
+		struct mwl8k_rx_desc *rx_desc;
+		struct sk_buff *skb;
+		struct ieee80211_rx_status status;
+		unsigned long addr;
+		struct ieee80211_hdr *wh;
+
+		rx_desc = rxq->rx_desc_area + rxq->rx_head;
+		if (!(rx_desc->rx_ctrl & MWL8K_RX_CTRL_OWNED_BY_HOST))
+			break;
+		rmb();
+
+		skb = rxq->rx_skb[rxq->rx_head];
+		rxq->rx_skb[rxq->rx_head] = NULL;
+
+		rxq->rx_head = (rxq->rx_head + 1) % MWL8K_RX_DESCS;
+		rxq->rx_desc_count--;
+
+		addr = le32_to_cpu(rx_desc->pkt_phys_addr);
+		pci_unmap_single(priv->pdev, addr,
+					MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
+
+		skb_put(skb, le16_to_cpu(rx_desc->pkt_len));
+		if (mwl8k_remove_dma_header(skb)) {
+			dev_kfree_skb(skb);
+			continue;
+		}
+
+		wh = (struct ieee80211_hdr *)skb->data;
+
+		/*
+		 * Check for pending join operation. save a copy of
+		 * the beacon and schedule a tasklet to send finalize
+		 * join command to the firmware.
+		 */
+		if (mwl8k_capture_bssid(priv, wh))
+			mwl8k_save_beacon(priv, skb);
+
+		memset(&status, 0, sizeof(status));
+		status.mactime = 0;
+		status.signal = -rx_desc->rssi;
+		status.noise = -rx_desc->noise_level;
+		status.qual = rx_desc->link_quality;
+		status.antenna = 1;
+		status.rate_idx = 1;
+		status.flag = 0;
+		status.band = IEEE80211_BAND_2GHZ;
+		status.freq = ieee80211_channel_to_frequency(rx_desc->channel);
+		ieee80211_rx_irqsafe(hw, skb, &status);
+
+		processed++;
+	}
+
+	return processed;
+}
+
+
+/*
+ * Packet transmission.
+ */
+
+/* Transmit queue assignment.  */
+enum {
+	MWL8K_WME_AC_BK	= 0,		/* background access */
+	MWL8K_WME_AC_BE	= 1,		/* best effort access */
+	MWL8K_WME_AC_VI	= 2,		/* video access */
+	MWL8K_WME_AC_VO	= 3,		/* voice access */
+};
+
+/* Transmit packet ACK policy */
+#define MWL8K_TXD_ACK_POLICY_NORMAL		0
+#define MWL8K_TXD_ACK_POLICY_NONE		1
+#define MWL8K_TXD_ACK_POLICY_NO_EXPLICIT	2
+#define MWL8K_TXD_ACK_POLICY_BLOCKACK		3
+
+#define GET_TXQ(_ac) (\
+		((_ac) == WME_AC_VO) ? MWL8K_WME_AC_VO : \
+		((_ac) == WME_AC_VI) ? MWL8K_WME_AC_VI : \
+		((_ac) == WME_AC_BK) ? MWL8K_WME_AC_BK : \
+		MWL8K_WME_AC_BE)
+
+#define MWL8K_TXD_STATUS_IDLE			0x00000000
+#define MWL8K_TXD_STATUS_USED			0x00000001
+#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_BROADCAST_TX		0x00000010
+#define MWL8K_TXD_STATUS_FAILED_LINK_ERROR	0x00000020
+#define MWL8K_TXD_STATUS_FAILED_EXCEED_LIMIT	0x00000040
+#define MWL8K_TXD_STATUS_FAILED_AGING		0x00000080
+#define MWL8K_TXD_STATUS_HOST_CMD		0x40000000
+#define MWL8K_TXD_STATUS_FW_OWNED		0x80000000
+#define  MWL8K_TXD_SOFTSTALE				0x80
+#define  MWL8K_TXD_SOFTSTALE_MGMT_RETRY			0x01
+
+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[IEEE80211_ADDR_LEN];
+	__le32 next_tx_desc_phys_addr;
+	__le32 reserved;
+	__le16 rate_info;
+	__u8 peer_id;
+	__u8 tx_frag_cnt;
+} __attribute__((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;
+
+	memset(&txq->tx_stats, 0,
+		sizeof(struct ieee80211_tx_queue_stats));
+	txq->tx_stats.limit = MWL8K_TX_DESCS;
+	txq->tx_head = 0;
+	txq->tx_tail = 0;
+
+	size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
+
+	txq->tx_desc_area =
+		pci_alloc_consistent(priv->pdev, size, &txq->tx_desc_dma);
+	if (txq->tx_desc_area == NULL) {
+		printk(KERN_ERR "%s: failed to alloc TX descriptors\n",
+		       priv->name);
+		return -ENOMEM;
+	}
+	memset(txq->tx_desc_area, 0, size);
+
+	txq->tx_skb = kmalloc(MWL8K_TX_DESCS * sizeof(*txq->tx_skb),
+								GFP_KERNEL);
+	if (txq->tx_skb == NULL) {
+		printk(KERN_ERR "%s: failed to alloc TX skbuff list\n",
+		       priv->name);
+		pci_free_consistent(priv->pdev, size,
+				    txq->tx_desc_area, txq->tx_desc_dma);
+		return -ENOMEM;
+	}
+	memset(txq->tx_skb, 0, MWL8K_TX_DESCS * sizeof(*txq->tx_skb));
+
+	for (i = 0; i < MWL8K_TX_DESCS; i++) {
+		struct mwl8k_tx_desc *tx_desc;
+		int nexti;
+
+		tx_desc = txq->tx_desc_area + i;
+		nexti = (i + 1) % MWL8K_TX_DESCS;
+
+		tx_desc->status = 0;
+		tx_desc->next_tx_desc_phys_addr =
+			cpu_to_le32(txq->tx_desc_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 inline int mwl8k_txq_busy(struct mwl8k_priv *priv)
+{
+	return priv->pending_tx_pkts;
+}
+
+struct mwl8k_txq_info {
+	u32 fw_owned;
+	u32 drv_owned;
+	u32 unused;
+	u32 len;
+	u32 head;
+	u32 tail;
+};
+
+static int mwl8k_scan_tx_ring(struct mwl8k_priv *priv,
+				struct mwl8k_txq_info txinfo[],
+				u32 num_queues)
+{
+	int count, desc, status;
+	struct mwl8k_tx_queue *txq;
+	struct mwl8k_tx_desc *tx_desc;
+	int ndescs = 0;
+
+	memset(txinfo, 0, num_queues * sizeof(struct mwl8k_txq_info));
+	spin_lock_bh(&priv->tx_lock);
+	for (count = 0; count < num_queues; count++) {
+		txq = priv->txq + count;
+		txinfo[count].len = txq->tx_stats.len;
+		txinfo[count].head = txq->tx_head;
+		txinfo[count].tail = txq->tx_tail;
+		for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
+			tx_desc = txq->tx_desc_area + desc;
+			status = le32_to_cpu(tx_desc->status);
+
+			if (status & MWL8K_TXD_STATUS_FW_OWNED)
+				txinfo[count].fw_owned++;
+			else
+				txinfo[count].drv_owned++;
+
+			if (tx_desc->pkt_len == 0)
+				txinfo[count].unused++;
+		}
+	}
+	spin_unlock_bh(&priv->tx_lock);
+
+	return ndescs;
+}
+
+static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms)
+{
+	u32 count = 0;
+	unsigned long timeout = 0;
+	struct mwl8k_priv *priv = hw->priv;
+	DECLARE_COMPLETION_ONSTACK(cmd_wait);
+
+	might_sleep();
+
+	if (priv->tx_wait != NULL)
+		printk(KERN_ERR "WARNING Previous TXWaitEmpty instance\n");
+
+	spin_lock_bh(&priv->tx_lock);
+	count = mwl8k_txq_busy(priv);
+	if (count) {
+		priv->tx_wait = &cmd_wait;
+		if (priv->radio_state)
+			mwl8k_tx_start(priv);
+	}
+	spin_unlock_bh(&priv->tx_lock);
+
+	if (count) {
+		struct mwl8k_txq_info txinfo[4];
+		int index;
+		int newcount;
+
+		timeout = wait_for_completion_timeout(&cmd_wait,
+					msecs_to_jiffies(delay_ms));
+		if (timeout)
+			return 0;
+
+		spin_lock_bh(&priv->tx_lock);
+		priv->tx_wait = NULL;
+		newcount = mwl8k_txq_busy(priv);
+		spin_unlock_bh(&priv->tx_lock);
+
+		printk(KERN_ERR "%s(%u) TIMEDOUT:%ums Pend:%u-->%u\n",
+		       __func__, __LINE__, delay_ms, count, newcount);
+
+		mwl8k_scan_tx_ring(priv, txinfo, 4);
+		for (index = 0 ; index < 4; index++)
+			printk(KERN_ERR
+				"TXQ:%u L:%u H:%u T:%u FW:%u DRV:%u U:%u\n",
+					index,
+					txinfo[index].len,
+					txinfo[index].head,
+					txinfo[index].tail,
+					txinfo[index].fw_owned,
+					txinfo[index].drv_owned,
+					txinfo[index].unused);
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+#define MWL8K_TXD_OK	(MWL8K_TXD_STATUS_OK | \
+			 MWL8K_TXD_STATUS_OK_RETRY | \
+			 MWL8K_TXD_STATUS_OK_MORE_RETRY)
+#define MWL8K_TXD_SUCCESS(stat)		((stat) & MWL8K_TXD_OK)
+#define MWL8K_TXD_FAIL_RETRY(stat)	\
+	((stat) & (MWL8K_TXD_STATUS_FAILED_EXCEED_LIMIT))
+
+static void mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int force)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_tx_queue *txq = priv->txq + index;
+	int wake = 0;
+
+	while (txq->tx_stats.len > 0) {
+		int tx;
+		int rc;
+		struct mwl8k_tx_desc *tx_desc;
+		unsigned long addr;
+		size_t size;
+		struct sk_buff *skb;
+		struct ieee80211_tx_info *info;
+		u32 status;
+
+		rc = 0;
+		tx = txq->tx_head;
+		tx_desc = txq->tx_desc_area + 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->tx_head = (tx + 1) % MWL8K_TX_DESCS;
+		BUG_ON(txq->tx_stats.len == 0);
+		txq->tx_stats.len--;
+		priv->pending_tx_pkts--;
+
+		addr = le32_to_cpu(tx_desc->pkt_phys_addr);
+		size = (u32)(le16_to_cpu(tx_desc->pkt_len));
+		skb = txq->tx_skb[tx].skb;
+		txq->tx_skb[tx].skb = NULL;
+
+		BUG_ON(skb == NULL);
+		pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
+
+		rc = mwl8k_remove_dma_header(skb);
+
+		/* Mark descriptor as unused */
+		tx_desc->pkt_phys_addr = 0;
+		tx_desc->pkt_len = 0;
+
+		if (txq->tx_skb[tx].clone) {
+			/* Replace with original skb
+			 * before returning to stack
+			 * as buffer has been cloned
+			 */
+			dev_kfree_skb(skb);
+			skb = txq->tx_skb[tx].clone;
+			txq->tx_skb[tx].clone = NULL;
+		}
+
+		if (rc) {
+			/* Something has gone wrong here.
+			 * Failed to remove DMA header.
+			 * Print error message and drop packet.
+			 */
+			printk(KERN_ERR "%s: Error removing DMA header from "
+					"tx skb 0x%p.\n", priv->name, skb);
+
+			dev_kfree_skb(skb);
+			continue;
+		}
+
+		info = IEEE80211_SKB_CB(skb);
+		ieee80211_tx_info_clear_status(info);
+
+		/* Convert firmware status stuff into tx_status */
+		if (MWL8K_TXD_SUCCESS(status)) {
+			/* Transmit OK */
+			info->flags |= IEEE80211_TX_STAT_ACK;
+		}
+
+		ieee80211_tx_status_irqsafe(hw, skb);
+
+		wake = !priv->inconfig && priv->radio_state;
+	}
+
+	if (wake)
+		ieee80211_wake_queue(hw, index);
+}
+
+/* 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;
+
+	mwl8k_txq_reclaim(hw, index, 1);
+
+	kfree(txq->tx_skb);
+	txq->tx_skb = NULL;
+
+	pci_free_consistent(priv->pdev,
+			    MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
+			    txq->tx_desc_area, txq->tx_desc_dma);
+	txq->tx_desc_area = NULL;
+}
+
+static int
+mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct ieee80211_tx_info *tx_info;
+	struct ieee80211_hdr *wh;
+	struct mwl8k_tx_queue *txq;
+	struct mwl8k_tx_desc *tx;
+	struct mwl8k_dma_data *tr;
+	struct mwl8k_vif *mwl8k_vif;
+	struct sk_buff *org_skb = skb;
+	dma_addr_t dma;
+	u16 qos = 0;
+	bool qosframe = false, ampduframe = false;
+	bool mcframe = false, eapolframe = false;
+	bool amsduframe = false;
+	__le16 fc;
+
+	txq = priv->txq + index;
+	tx = txq->tx_desc_area + txq->tx_tail;
+
+	BUG_ON(txq->tx_skb[txq->tx_tail].skb != NULL);
+
+	/*
+	 * Append HW DMA header to start of packet.  Drop packet if
+	 * there is not enough space or a failure to unshare/unclone
+	 * the skb.
+	 */
+	skb = mwl8k_add_dma_header(skb);
+
+	if (skb == NULL) {
+		printk(KERN_DEBUG "%s: failed to prepend HW DMA "
+			"header, dropping TX frame.\n", priv->name);
+		dev_kfree_skb(org_skb);
+		return NETDEV_TX_OK;
+	}
+
+	tx_info = IEEE80211_SKB_CB(skb);
+	mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
+	tr = (struct mwl8k_dma_data *)skb->data;
+	wh = &tr->wh;
+	fc = wh->frame_control;
+	qosframe = ieee80211_is_data_qos(fc);
+	mcframe = is_multicast_ether_addr(wh->addr1);
+	ampduframe = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
+
+	if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
+		u16 seqno = mwl8k_vif->seqno;
+		wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
+		wh->seq_ctrl |= cpu_to_le16(seqno << 4);
+		mwl8k_vif->seqno = seqno++ % 4096;
+	}
+
+	if (qosframe)
+		qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
+
+	dma = pci_map_single(priv->pdev, skb->data,
+				skb->len, PCI_DMA_TODEVICE);
+
+	if (pci_dma_mapping_error(priv->pdev, dma)) {
+		printk(KERN_DEBUG "%s: failed to dma map skb, "
+			"dropping TX frame.\n", priv->name);
+
+		if (org_skb != NULL)
+			dev_kfree_skb(org_skb);
+		if (skb != NULL)
+			dev_kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	/* Set desc header, cpu bit order.  */
+	tx->status = 0;
+	tx->data_rate = 0;
+	tx->tx_priority = index;
+	tx->qos_control = 0;
+	tx->rate_info = 0;
+	tx->peer_id = mwl8k_vif->peer_id;
+
+	amsduframe = !!(qos & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT);
+
+	/* Setup firmware control bit fields for each frame type.  */
+	if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)) {
+		tx->data_rate = 0;
+		qos = mwl8k_qos_setbit_eosp(qos);
+		/* Set Queue size to unspecified */
+		qos = mwl8k_qos_setbit_qlen(qos, 0xff);
+	} else if (ieee80211_is_data(fc)) {
+		tx->data_rate = 1;
+		if (mcframe)
+			tx->status |= MWL8K_TXD_STATUS_MULTICAST_TX;
+
+		/*
+		 * Tell firmware to not send EAPOL pkts in an
+		 * aggregate.  Verify against mac80211 tx path.  If
+		 * stack turns off AMPDU for an EAPOL frame this
+		 * check will be removed.
+		 */
+		if (eapolframe) {
+			qos = mwl8k_qos_setbit_ack(qos,
+				MWL8K_TXD_ACK_POLICY_NORMAL);
+		} else {
+			/* Send pkt in an aggregate if AMPDU frame.  */
+			if (ampduframe)
+				qos = mwl8k_qos_setbit_ack(qos,
+					MWL8K_TXD_ACK_POLICY_BLOCKACK);
+			else
+				qos = mwl8k_qos_setbit_ack(qos,
+					MWL8K_TXD_ACK_POLICY_NORMAL);
+
+			if (amsduframe)
+				qos = mwl8k_qos_setbit_amsdu(qos);
+		}
+	}
+
+	/* Convert to little endian */
+	tx->qos_control = cpu_to_le16(qos);
+	tx->status = cpu_to_le32(tx->status);
+	tx->pkt_phys_addr = cpu_to_le32(dma);
+	tx->pkt_len = cpu_to_le16(skb->len);
+
+	txq->tx_skb[txq->tx_tail].skb = skb;
+	txq->tx_skb[txq->tx_tail].clone =
+		skb == org_skb ? NULL : org_skb;
+
+	spin_lock_bh(&priv->tx_lock);
+
+	tx->status = cpu_to_le32(MWL8K_TXD_STATUS_OK |
+					MWL8K_TXD_STATUS_FW_OWNED);
+	wmb();
+	txq->tx_stats.len++;
+	priv->pending_tx_pkts++;
+	txq->tx_stats.count++;
+	txq->tx_tail++;
+
+	if (txq->tx_tail == MWL8K_TX_DESCS)
+		txq->tx_tail = 0;
+	if (txq->tx_head == txq->tx_tail)
+		ieee80211_stop_queue(hw, index);
+
+	if (priv->inconfig) {
+		/*
+		 * Silently queue packet when we are in the middle of
+		 * a config cycle.  Notify firmware only if we are
+		 * waiting for TXQs to empty.  If a packet is sent
+		 * before .config() is complete, perhaps it is better
+		 * to drop the packet, as the channel is being changed
+		 * and the packet will end up on the wrong channel.
+		 */
+		printk(KERN_ERR "%s(): WARNING TX activity while "
+			"in config\n", __func__);
+
+		if (priv->tx_wait != NULL)
+			mwl8k_tx_start(priv);
+	} else
+		mwl8k_tx_start(priv);
+
+	spin_unlock_bh(&priv->tx_lock);
+
+	return NETDEV_TX_OK;
+}
+
+
+/*
+ * Command processing.
+ */
+
+/* Timeout firmware commands after 2000ms */
+#define MWL8K_CMD_TIMEOUT_MS	2000
+
+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;
+	u16 __iomem *result;
+	unsigned long timeout = 0;
+	u8 buf[32];
+
+	cmd->result = 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))
+		return -ENOMEM;
+
+	if (priv->hostcmd_wait != NULL)
+		printk(KERN_ERR "WARNING host command in progress\n");
+
+	spin_lock_irq(&priv->fw_lock);
+	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);
+	spin_unlock_irq(&priv->fw_lock);
+
+	timeout = wait_for_completion_timeout(&cmd_wait,
+				msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
+
+	result = &cmd->result;
+	if (!timeout) {
+		spin_lock_irq(&priv->fw_lock);
+		priv->hostcmd_wait = NULL;
+		spin_unlock_irq(&priv->fw_lock);
+		printk(KERN_ERR "%s: Command %s timeout after %u ms\n",
+		       priv->name,
+		       mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
+		       MWL8K_CMD_TIMEOUT_MS);
+		rc = -ETIMEDOUT;
+	} else {
+		rc = *result ? -EINVAL : 0;
+		if (rc)
+			printk(KERN_ERR "%s: Command %s error 0x%x\n",
+			       priv->name,
+			       mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
+			       *result);
+	}
+
+	pci_unmap_single(priv->pdev, dma_addr, dma_size,
+					PCI_DMA_BIDIRECTIONAL);
+	return rc;
+}
+
+/*
+ * GET_HW_SPEC.
+ */
+struct mwl8k_cmd_get_hw_spec {
+	struct mwl8k_cmd_pkt header;
+	__u8 hw_rev;
+	__u8 host_interface;
+	__le16 num_mcaddrs;
+	__u8 perm_addr[IEEE80211_ADDR_LEN];
+	__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_QUEUES];
+	__le32 caps2;
+	__le32 num_tx_desc_per_queue;
+	__le32 total_rx_desc;
+} __attribute__((packed));
+
+static int mwl8k_cmd_get_hw_spec(struct ieee80211_hw *hw)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_get_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_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].rx_desc_dma);
+	cmd->num_tx_queues = MWL8K_TX_QUEUES;
+	for (i = 0; i < MWL8K_TX_QUEUES; i++)
+		cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].tx_desc_dma);
+	cmd->num_tx_desc_per_queue = MWL8K_TX_DESCS;
+	cmd->total_rx_desc = 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 = cmd->fw_rev;
+		priv->hw_rev = cmd->hw_rev;
+		priv->region_code = le16_to_cpu(cmd->region_code);
+	}
+
+	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[1][IEEE80211_ADDR_LEN];
+};
+
+#define MWL8K_ENABLE_RX_MULTICAST 0x000F
+static int mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw,
+					int mc_count,
+					struct dev_addr_list *mclist)
+{
+	struct mwl8k_cmd_mac_multicast_adr *cmd;
+	int index = 0;
+	int rc;
+	int size = sizeof(*cmd) + ((mc_count - 1) * IEEE80211_ADDR_LEN);
+	cmd = kzalloc(size, GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	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_MULTICAST);
+	cmd->numaddr = cpu_to_le16(mc_count);
+	while ((index < mc_count) && mclist) {
+		if (mclist->da_addrlen != IEEE80211_ADDR_LEN) {
+			rc = -EINVAL;
+			goto mwl8k_cmd_mac_multicast_adr_exit;
+		}
+		memcpy(cmd->addr[index], mclist->da_addr, IEEE80211_ADDR_LEN);
+		index++;
+		mclist = mclist->next;
+	}
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+
+mwl8k_cmd_mac_multicast_adr_exit:
+	kfree(cmd);
+	return rc;
+}
+
+/*
+ * CMD_802_11_GET_STAT.
+ */
+struct mwl8k_cmd_802_11_get_stat {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le32 stats[64];
+} __attribute__((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_802_11_get_stat(struct ieee80211_hw *hw,
+				struct ieee80211_low_level_stats *stats)
+{
+	struct mwl8k_cmd_802_11_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));
+	cmd->action = cpu_to_le16(MWL8K_CMD_GET);
+
+	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_802_11_RADIO_CONTROL.
+ */
+struct mwl8k_cmd_802_11_radio_control {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 control;
+	__le16 radio_on;
+} __attribute__((packed));
+
+static int mwl8k_cmd_802_11_radio_control(struct ieee80211_hw *hw, int enable)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_802_11_radio_control *cmd;
+	int rc;
+
+	if (((enable & MWL8K_RADIO_ENABLE) == priv->radio_state) &&
+	    !(enable & MWL8K_RADIO_FORCE))
+		return 0;
+
+	enable &= MWL8K_RADIO_ENABLE;
+
+	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_preamble);
+	cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	if (!rc)
+		priv->radio_state = enable;
+
+	return rc;
+}
+
+static int
+mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
+{
+	struct mwl8k_priv *priv;
+
+	if (hw == NULL || hw->priv == NULL)
+		return -EINVAL;
+	priv = hw->priv;
+
+	priv->radio_preamble = (short_preamble ?
+		MWL8K_RADIO_SHORT_PREAMBLE :
+		MWL8K_RADIO_LONG_PREAMBLE);
+
+	return mwl8k_cmd_802_11_radio_control(hw,
+			MWL8K_RADIO_ENABLE | MWL8K_RADIO_FORCE);
+}
+
+/*
+ * CMD_802_11_RF_TX_POWER.
+ */
+#define MWL8K_TX_POWER_LEVEL_TOTAL	8
+
+struct mwl8k_cmd_802_11_rf_tx_power {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 support_level;
+	__le16 current_level;
+	__le16 reserved;
+	__le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
+} __attribute__((packed));
+
+static int mwl8k_cmd_802_11_rf_tx_power(struct ieee80211_hw *hw, int dBm)
+{
+	struct mwl8k_cmd_802_11_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_SET_PRE_SCAN.
+ */
+struct mwl8k_cmd_set_pre_scan {
+	struct mwl8k_cmd_pkt header;
+} __attribute__((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_SET_POST_SCAN.
+ */
+struct mwl8k_cmd_set_post_scan {
+	struct mwl8k_cmd_pkt header;
+	__le32 isibss;
+	__u8 bssid[IEEE80211_ADDR_LEN];
+} __attribute__((packed));
+
+static int
+mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, __u8 mac[IEEE80211_ADDR_LEN])
+{
+	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, IEEE80211_ADDR_LEN);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_RF_CHANNEL.
+ */
+struct mwl8k_cmd_set_rf_channel {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__u8 current_channel;
+	__le32 channel_flags;
+} __attribute__((packed));
+
+static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
+				    struct ieee80211_channel *channel)
+{
+	struct mwl8k_cmd_set_rf_channel *cmd;
+	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 == IEEE80211_BAND_2GHZ)
+		cmd->channel_flags = cpu_to_le32(0x00000081);
+	else
+		cmd->channel_flags = cpu_to_le32(0x00000000);
+
+	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;
+} __attribute__((packed));
+
+static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, int 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 = slot_time == MWL8K_SHORT_SLOTTIME ? 1 : 0;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	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;
+} __attribute__((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_ENABLE_SNIFFER.
+ */
+struct mwl8k_cmd_enable_sniffer {
+	struct mwl8k_cmd_pkt header;
+	__le32 action;
+} __attribute__((packed));
+
+static int mwl8k_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 = enable ? cpu_to_le32((u32)MWL8K_CMD_SET) : 0;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_RATE_ADAPT_MODE.
+ */
+struct mwl8k_cmd_set_rate_adapt_mode {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 mode;
+} __attribute__((packed));
+
+static int mwl8k_cmd_setrateadaptmode(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_SET_WMM_MODE.
+ */
+struct mwl8k_cmd_set_wmm {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+} __attribute__((packed));
+
+static int mwl8k_set_wmm(struct ieee80211_hw *hw, bool enable)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_cmd_set_wmm *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 = enable ? cpu_to_le16(MWL8K_CMD_SET) : 0;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	if (!rc)
+		priv->wmm_mode = enable;
+
+	return rc;
+}
+
+/*
+ * CMD_SET_RTS_THRESHOLD.
+ */
+struct mwl8k_cmd_rts_threshold {
+	struct mwl8k_cmd_pkt header;
+	__le16 action;
+	__le16 threshold;
+} __attribute__((packed));
+
+static int mwl8k_rts_threshold(struct ieee80211_hw *hw,
+			       u16 action, u16 *threshold)
+{
+	struct mwl8k_cmd_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(action);
+	cmd->threshold = cpu_to_le16(*threshold);
+
+	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;
+
+	/* 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;
+} __attribute__((packed));
+
+#define MWL8K_GET_EDCA_ALL	0
+#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_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
+		__u16 cw_min, __u16 cw_max,
+		__u8 aifs, __u16 txop)
+{
+	struct mwl8k_cmd_set_edca_params *cmd;
+	u32 log_cw_min, log_cw_max;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	log_cw_min = ilog2(cw_min+1);
+	log_cw_max = ilog2(cw_max+1);
+	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);
+	cmd->log_cw_max = (u8)log_cw_max;
+	cmd->log_cw_min = (u8)log_cw_min;
+	cmd->aifs = aifs;
+	cmd->txq = qnum;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_FINALIZE_JOIN.
+ */
+
+/* FJ beacon buffer size is compiled into the firmware.  */
+#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];
+} __attribute__((packed));
+
+static int mwl8k_finalize_join(struct ieee80211_hw *hw, void *frame,
+				__u16 framelen, __u16 dtim)
+{
+	struct mwl8k_cmd_finalize_join *cmd;
+	struct ieee80211_mgmt *payload = frame;
+	u16 hdrlen;
+	u32 payload_len;
+	int rc;
+
+	if (frame == NULL)
+		return -EINVAL;
+
+	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));
+
+	if (dtim)
+		cmd->sleep_interval = cpu_to_le32(dtim);
+	else
+		cmd->sleep_interval = cpu_to_le32(1);
+
+	hdrlen = ieee80211_hdrlen(payload->frame_control);
+
+	payload_len = framelen > hdrlen ? framelen - hdrlen : 0;
+
+	/* XXX TBD Might just have to abort and return an error */
+	if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
+		printk(KERN_ERR "%s(): WARNING: Incomplete beacon "
+			"sent to firmware. Sz=%u MAX=%u\n", __func__,
+			payload_len, MWL8K_FJ_BEACON_MAXLEN);
+
+	payload_len = payload_len > MWL8K_FJ_BEACON_MAXLEN ?
+				MWL8K_FJ_BEACON_MAXLEN : payload_len;
+
+	if (payload && payload_len)
+		memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+	return rc;
+}
+
+/*
+ * CMD_UPDATE_STADB.
+ */
+struct mwl8k_cmd_update_sta_db {
+	struct mwl8k_cmd_pkt header;
+
+	/* See STADB_ACTION_TYPE */
+	__le32	action;
+
+	/* Peer MAC address */
+	__u8	peer_addr[IEEE80211_ADDR_LEN];
+
+	__le32	reserved;
+
+	/* Peer info - valid during add/update.  */
+	struct peer_capability_info	peer_info;
+} __attribute__((packed));
+
+static int mwl8k_cmd_update_sta_db(struct ieee80211_hw *hw,
+		struct ieee80211_vif *vif, __u32 action)
+{
+	struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
+	struct ieee80211_bss_conf *info = &mv_vif->bss_info;
+	struct mwl8k_cmd_update_sta_db *cmd;
+	struct peer_capability_info *peer_info;
+	struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
+	DECLARE_MAC_BUF(mac);
+	int rc;
+	__u8 count, *rates;
+
+	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(action);
+	peer_info = &cmd->peer_info;
+	memcpy(cmd->peer_addr, mv_vif->bssid, IEEE80211_ADDR_LEN);
+
+	switch (action) {
+	case MWL8K_STA_DB_ADD_ENTRY:
+	case MWL8K_STA_DB_MODIFY_ENTRY:
+		/* Build peer_info block */
+		peer_info->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
+		peer_info->basic_caps = cpu_to_le16(info->assoc_capability);
+		peer_info->interop = 1;
+		peer_info->amsdu_enabled = 0;
+
+		rates = peer_info->legacy_rates;
+		for (count = 0 ; count < mv_vif->legacy_nrates; count++)
+			rates[count] = bitrates[count].hw_value;
+
+		rc = mwl8k_post_cmd(hw, &cmd->header);
+		if (rc == 0)
+			mv_vif->peer_id = peer_info->station_id;
+
+		break;
+
+	case MWL8K_STA_DB_DEL_ENTRY:
+	case MWL8K_STA_DB_FLUSH:
+	default:
+		rc = mwl8k_post_cmd(hw, &cmd->header);
+		if (rc == 0)
+			mv_vif->peer_id = 0;
+		break;
+	}
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_AID.
+ */
+#define IEEE80211_OPMODE_DISABLED			0x00
+#define IEEE80211_OPMODE_NON_MEMBER_PROT_MODE		0x01
+#define IEEE80211_OPMODE_ONE_20MHZ_STA_PROT_MODE	0x02
+#define IEEE80211_OPMODE_HTMIXED_PROT_MODE		0x03
+
+#define MWL8K_RATE_INDEX_MAX_ARRAY			14
+
+#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
+#define MWL8K_FRAME_PROT_MASK				0x07
+
+struct mwl8k_cmd_update_set_aid {
+	struct	mwl8k_cmd_pkt header;
+	__le16	aid;
+
+	 /* AP's MAC address (BSSID) */
+	__u8	bssid[IEEE80211_ADDR_LEN];
+	__le16	protection_mode;
+	__u8	supp_rates[MWL8K_RATE_INDEX_MAX_ARRAY];
+} __attribute__((packed));
+
+static int mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
+					struct ieee80211_vif *vif)
+{
+	struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
+	struct ieee80211_bss_conf *info = &mv_vif->bss_info;
+	struct mwl8k_cmd_update_set_aid *cmd;
+	struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
+	int count;
+	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(info->aid);
+
+	memcpy(cmd->bssid, mv_vif->bssid, IEEE80211_ADDR_LEN);
+
+	prot_mode = MWL8K_FRAME_PROT_DISABLED;
+
+	if (info->use_cts_prot) {
+		prot_mode = MWL8K_FRAME_PROT_11G;
+	} else {
+		switch (info->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);
+
+	for (count = 0; count < mv_vif->legacy_nrates; count++)
+		cmd->supp_rates[count] = bitrates[count].hw_value;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_SET_RATE.
+ */
+struct mwl8k_cmd_update_rateset {
+	struct	mwl8k_cmd_pkt header;
+	__u8	legacy_rates[MWL8K_RATE_INDEX_MAX_ARRAY];
+
+	/* Bitmap for supported MCS codes.  */
+	__u8	mcs_set[MWL8K_IEEE_LEGACY_DATA_RATES];
+	__u8	reserved[MWL8K_IEEE_LEGACY_DATA_RATES];
+} __attribute__((packed));
+
+static int mwl8k_update_rateset(struct ieee80211_hw *hw,
+		struct ieee80211_vif *vif)
+{
+	struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
+	struct mwl8k_cmd_update_rateset *cmd;
+	struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
+	int count;
+	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));
+
+	for (count = 0; count < mv_vif->legacy_nrates; count++)
+		cmd->legacy_rates[count] = bitrates[count].hw_value;
+
+	rc = mwl8k_post_cmd(hw, &cmd->header);
+	kfree(cmd);
+
+	return rc;
+}
+
+/*
+ * CMD_USE_FIXED_RATE.
+ */
+#define MWL8K_RATE_TABLE_SIZE	8
+#define MWL8K_UCAST_RATE	0
+#define MWL8K_MCAST_RATE	1
+#define MWL8K_BCAST_RATE	2
+
+#define MWL8K_USE_FIXED_RATE	0x0001
+#define MWL8K_USE_AUTO_RATE	0x0002
+
+struct mwl8k_rate_entry {
+	/* Set to 1 if HT rate, 0 if legacy.  */
+	__le32	is_ht_rate;
+
+	/* Set to 1 to use retry_count field.  */
+	__le32	enable_retry;
+
+	/* Specified legacy rate or MCS.  */
+	__le32	rate;
+
+	/* Number of allowed retries.  */
+	__le32	retry_count;
+} __attribute__((packed));
+
+struct mwl8k_rate_table {
+	/* 1 to allow specified rate and below */
+	__le32	allow_rate_drop;
+	__le32	num_rates;
+	struct mwl8k_rate_entry rate_entry[MWL8K_RATE_TABLE_SIZE];
+} __attribute__((packed));
+
+struct mwl8k_cmd_use_fixed_rate {
+	struct	mwl8k_cmd_pkt header;
+	__le32	action;
+	struct mwl8k_rate_table rate_table;
+
+	/* Unicast, Broadcast or Multicast */
+	__le32	rate_type;
+	__le32	reserved1;
+	__le32	reserved2;
+} __attribute__((packed));
+
+static int mwl8k_cmd_use_fixed_rate(struct ieee80211_hw *hw,
+	u32 action, u32 rate_type, struct mwl8k_rate_table *rate_table)
+{
+	struct mwl8k_cmd_use_fixed_rate *cmd;
+	int count;
+	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(action);
+	cmd->rate_type = cpu_to_le32(rate_type);
+
+	if (rate_table != NULL) {
+		/* Copy over each field manually so
+		* that bitflipping can be done
+		*/
+		cmd->rate_table.allow_rate_drop =
+				cpu_to_le32(rate_table->allow_rate_drop);
+		cmd->rate_table.num_rates =
+				cpu_to_le32(rate_table->num_rates);
+
+		for (count = 0; count < rate_table->num_rates; count++) {
+			struct mwl8k_rate_entry *dst =
+				&cmd->rate_table.rate_entry[count];
+			struct mwl8k_rate_entry *src =
+				&rate_table->rate_entry[count];
+
+			dst->is_ht_rate = cpu_to_le32(src->is_ht_rate);
+			dst->enable_retry = cpu_to_le32(src->enable_retry);
+			dst->rate = cpu_to_le32(src->rate);
+			dst->retry_count = cpu_to_le32(src->retry_count);
+		}
+	}
+
+	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);
+	iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+
+	status &= priv->int_mask;
+	if (!status)
+		return IRQ_NONE;
+
+	if (status & MWL8K_A2H_INT_TX_DONE)
+		tasklet_schedule(&priv->tx_reclaim_task);
+
+	if (status & MWL8K_A2H_INT_RX_READY) {
+		while (rxq_process(hw, 0, 1))
+			rxq_refill(hw, 0, 1);
+	}
+
+	if (status & MWL8K_A2H_INT_OPC_DONE) {
+		if (priv->hostcmd_wait != NULL) {
+			complete(priv->hostcmd_wait);
+			priv->hostcmd_wait = NULL;
+		}
+	}
+
+	if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
+		if (!priv->inconfig &&
+			priv->radio_state &&
+			mwl8k_txq_busy(priv))
+				mwl8k_tx_start(priv);
+	}
+
+	return IRQ_HANDLED;
+}
+
+
+/*
+ * Core driver operations.
+ */
+static int mwl8k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int index = skb_get_queue_mapping(skb);
+	int rc;
+
+	if (priv->current_channel == NULL) {
+		printk(KERN_DEBUG "%s: dropped TX frame since radio "
+		       "disabled\n", priv->name);
+		dev_kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	rc = mwl8k_txq_xmit(hw, index, skb);
+
+	return rc;
+}
+
+struct mwl8k_work_struct {
+	/* Initialized by mwl8k_queue_work().  */
+	struct work_struct wt;
+
+	/* Required field passed in to mwl8k_queue_work().  */
+	struct ieee80211_hw *hw;
+
+	/* Required field passed in to mwl8k_queue_work().  */
+	int (*wfunc)(struct work_struct *w);
+
+	/* Initialized by mwl8k_queue_work().  */
+	struct completion *cmd_wait;
+
+	/* Result code.  */
+	int rc;
+
+	/*
+	 * Optional field. Refer to explanation of MWL8K_WQ_XXX_XXX
+	 * flags for explanation.  Defaults to MWL8K_WQ_DEFAULT_OPTIONS.
+	 */
+	u32 options;
+
+	/* Optional field.  Defaults to MWL8K_CONFIG_TIMEOUT_MS.  */
+	unsigned long timeout_ms;
+
+	/* Optional field.  Defaults to MWL8K_WQ_TXWAIT_ATTEMPTS.  */
+	u32 txwait_attempts;
+
+	/* Optional field.  Defaults to MWL8K_TXWAIT_MS.  */
+	u32 tx_timeout_ms;
+	u32 step;
+};
+
+/* Flags controlling behavior of config queue requests */
+
+/* Caller spins while waiting for completion.  */
+#define MWL8K_WQ_SPIN			0x00000001
+
+/* Wait for TX queues to empty before proceeding with configuration.  */
+#define MWL8K_WQ_TX_WAIT_EMPTY		0x00000002
+
+/* Queue request and return immediately.  */
+#define MWL8K_WQ_POST_REQUEST		0x00000004
+
+/*
+ * Caller sleeps and waits for task complete notification.
+ * Do not use in atomic context.
+ */
+#define MWL8K_WQ_SLEEP			0x00000008
+
+/* Free work struct when task is done.  */
+#define MWL8K_WQ_FREE_WORKSTRUCT	0x00000010
+
+/*
+ * Config request is queued and returns to caller imediately.  Use
+ * this in atomic context. Work struct is freed by mwl8k_queue_work()
+ * when this flag is set.
+ */
+#define MWL8K_WQ_QUEUE_ONLY	(MWL8K_WQ_POST_REQUEST | \
+				 MWL8K_WQ_FREE_WORKSTRUCT)
+
+/* Default work queue behavior is to sleep and wait for tx completion.  */
+#define MWL8K_WQ_DEFAULT_OPTIONS (MWL8K_WQ_SLEEP | MWL8K_WQ_TX_WAIT_EMPTY)
+
+/*
+ * Default config request timeout.  Add adjustments to make sure the
+ * config thread waits long enough for both tx wait and cmd wait before
+ * timing out.
+ */
+
+/* Time to wait for all TXQs to drain.  TX Doorbell is pressed each time.  */
+#define MWL8K_TXWAIT_TIMEOUT_MS		1000
+
+/* Default number of TX wait attempts.  */
+#define MWL8K_WQ_TXWAIT_ATTEMPTS	4
+
+/* Total time to wait for TXQ to drain.  */
+#define MWL8K_TXWAIT_MS			(MWL8K_TXWAIT_TIMEOUT_MS * \
+						MWL8K_WQ_TXWAIT_ATTEMPTS)
+
+/* Scheduling slop.  */
+#define MWL8K_OS_SCHEDULE_OVERHEAD_MS	200
+
+#define MWL8K_CONFIG_TIMEOUT_MS	(MWL8K_CMD_TIMEOUT_MS + \
+				 MWL8K_TXWAIT_MS + \
+				 MWL8K_OS_SCHEDULE_OVERHEAD_MS)
+
+static void mwl8k_config_thread(struct work_struct *wt)
+{
+	struct mwl8k_work_struct *worker = (struct mwl8k_work_struct *)wt;
+	struct ieee80211_hw *hw = worker->hw;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc = 0;
+
+	spin_lock_irq(&priv->tx_lock);
+	priv->inconfig = true;
+	spin_unlock_irq(&priv->tx_lock);
+
+	ieee80211_stop_queues(hw);
+
+	/*
+	 * Wait for host queues to drain before doing PHY
+	 * reconfiguration. This avoids interrupting any in-flight
+	 * DMA transfers to the hardware.
+	 */
+	if (worker->options & MWL8K_WQ_TX_WAIT_EMPTY) {
+		u32 timeout;
+		u32 time_remaining;
+		u32 iter;
+		u32 tx_wait_attempts = worker->txwait_attempts;
+
+		time_remaining = worker->tx_timeout_ms;
+		if (!tx_wait_attempts)
+			tx_wait_attempts = 1;
+
+		timeout = worker->tx_timeout_ms/tx_wait_attempts;
+		if (!timeout)
+			timeout = 1;
+
+		iter = tx_wait_attempts;
+		do {
+			int wait_time;
+
+			if (time_remaining > timeout) {
+				time_remaining -= timeout;
+				wait_time = timeout;
+			} else
+				wait_time = time_remaining;
+
+			if (!wait_time)
+				wait_time = 1;
+
+			rc = mwl8k_tx_wait_empty(hw, wait_time);
+			if (rc)
+				printk(KERN_ERR "%s() txwait timeout=%ums "
+					"Retry:%u/%u\n", __func__, timeout,
+					tx_wait_attempts - iter + 1,
+					tx_wait_attempts);
+
+		} while (rc && --iter);
+
+		rc = iter ? 0 : -ETIMEDOUT;
+	}
+	if (!rc)
+		rc = worker->wfunc(wt);
+
+	spin_lock_irq(&priv->tx_lock);
+	priv->inconfig = false;
+	if (priv->pending_tx_pkts && priv->radio_state)
+		mwl8k_tx_start(priv);
+	spin_unlock_irq(&priv->tx_lock);
+	ieee80211_wake_queues(hw);
+
+	worker->rc = rc;
+	if (worker->options & MWL8K_WQ_SLEEP)
+		complete(worker->cmd_wait);
+
+	if (worker->options & MWL8K_WQ_FREE_WORKSTRUCT)
+		kfree(wt);
+}
+
+static int mwl8k_queue_work(struct ieee80211_hw *hw,
+				struct mwl8k_work_struct *worker,
+				struct workqueue_struct *wqueue,
+				int (*wfunc)(struct work_struct *w))
+{
+	unsigned long timeout = 0;
+	int rc = 0;
+
+	DECLARE_COMPLETION_ONSTACK(cmd_wait);
+
+	if (!worker->timeout_ms)
+		worker->timeout_ms = MWL8K_CONFIG_TIMEOUT_MS;
+
+	if (!worker->options)
+		worker->options = MWL8K_WQ_DEFAULT_OPTIONS;
+
+	if (!worker->txwait_attempts)
+		worker->txwait_attempts = MWL8K_WQ_TXWAIT_ATTEMPTS;
+
+	if (!worker->tx_timeout_ms)
+		worker->tx_timeout_ms = MWL8K_TXWAIT_MS;
+
+	worker->hw = hw;
+	worker->cmd_wait = &cmd_wait;
+	worker->rc = 1;
+	worker->wfunc = wfunc;
+
+	INIT_WORK(&worker->wt, mwl8k_config_thread);
+	queue_work(wqueue, &worker->wt);
+
+	if (worker->options & MWL8K_WQ_POST_REQUEST) {
+		rc = 0;
+	} else {
+		if (worker->options & MWL8K_WQ_SPIN) {
+			timeout = worker->timeout_ms;
+			while (timeout && (worker->rc > 0)) {
+				mdelay(1);
+				timeout--;
+			}
+		} else if (worker->options & MWL8K_WQ_SLEEP)
+			timeout = wait_for_completion_timeout(&cmd_wait,
+				msecs_to_jiffies(worker->timeout_ms));
+
+		if (timeout)
+			rc = worker->rc;
+		else {
+			cancel_work_sync(&worker->wt);
+			rc = -ETIMEDOUT;
+		}
+	}
+
+	return rc;
+}
+
+struct mwl8k_start_worker {
+	struct mwl8k_work_struct header;
+};
+
+static int mwl8k_start_wt(struct work_struct *wt)
+{
+	struct mwl8k_start_worker *worker = (struct mwl8k_start_worker *)wt;
+	struct ieee80211_hw *hw = worker->header.hw;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc = 0;
+
+	if (priv->vif != NULL) {
+		rc = -EIO;
+		goto mwl8k_start_exit;
+	}
+
+	/* Turn on radio */
+	if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) {
+		rc = -EIO;
+		goto mwl8k_start_exit;
+	}
+
+	/* Purge TX/RX HW queues */
+	if (mwl8k_cmd_set_pre_scan(hw)) {
+		rc = -EIO;
+		goto mwl8k_start_exit;
+	}
+
+	if (mwl8k_cmd_set_post_scan(hw, "\x00\x00\x00\x00\x00\x00")) {
+		rc = -EIO;
+		goto mwl8k_start_exit;
+	}
+
+	/* Enable firmware rate adaptation */
+	if (mwl8k_cmd_setrateadaptmode(hw, 0)) {
+		rc = -EIO;
+		goto mwl8k_start_exit;
+	}
+
+	/* Disable WMM. WMM gets enabled when stack sends WMM parms */
+	if (mwl8k_set_wmm(hw, MWL8K_WMM_DISABLE)) {
+		rc = -EIO;
+		goto mwl8k_start_exit;
+	}
+
+	/* Disable sniffer mode */
+	if (mwl8k_enable_sniffer(hw, 0))
+		rc = -EIO;
+
+mwl8k_start_exit:
+	return rc;
+}
+
+static int mwl8k_start(struct ieee80211_hw *hw)
+{
+	struct mwl8k_start_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+
+	/* Enable tx reclaim tasklet */
+	tasklet_enable(&priv->tx_reclaim_task);
+
+	rc = request_irq(priv->pdev->irq, &mwl8k_interrupt,
+			 IRQF_SHARED, MWL8K_NAME, hw);
+	if (rc) {
+		printk(KERN_ERR "%s: failed to register IRQ handler\n",
+		       priv->name);
+		rc = -EIO;
+		goto mwl8k_start_disable_tasklet;
+	}
+
+	/* Enable interrupts */
+	iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+
+	worker = kzalloc(sizeof(*worker), GFP_KERNEL);
+	if (worker == NULL) {
+		rc = -ENOMEM;
+		goto mwl8k_start_disable_irq;
+	}
+
+	rc = mwl8k_queue_work(hw, &worker->header,
+			      priv->config_wq, mwl8k_start_wt);
+	kfree(worker);
+	if (!rc)
+		return rc;
+
+	if (rc == -ETIMEDOUT)
+		printk(KERN_ERR "%s() timed out\n", __func__);
+
+	rc = -EIO;
+
+mwl8k_start_disable_irq:
+	spin_lock_irq(&priv->tx_lock);
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	spin_unlock_irq(&priv->tx_lock);
+	free_irq(priv->pdev->irq, hw);
+
+mwl8k_start_disable_tasklet:
+	tasklet_disable(&priv->tx_reclaim_task);
+
+	return rc;
+}
+
+struct mwl8k_stop_worker {
+	struct mwl8k_work_struct header;
+};
+
+static int mwl8k_stop_wt(struct work_struct *wt)
+{
+	struct mwl8k_stop_worker *worker = (struct mwl8k_stop_worker *)wt;
+	struct ieee80211_hw *hw = worker->header.hw;
+	int rc;
+
+	rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE);
+
+	return rc;
+}
+
+static void mwl8k_stop(struct ieee80211_hw *hw)
+{
+	int rc;
+	struct mwl8k_stop_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+	int i;
+
+	if (priv->vif != NULL)
+		return;
+
+	ieee80211_stop_queues(hw);
+
+	worker = kzalloc(sizeof(*worker), GFP_KERNEL);
+	if (worker == NULL)
+		return;
+
+	rc = mwl8k_queue_work(hw, &worker->header,
+			      priv->config_wq, mwl8k_stop_wt);
+	kfree(worker);
+	if (rc == -ETIMEDOUT)
+		printk(KERN_ERR "%s() timed out\n", __func__);
+
+	/* Disable interrupts */
+	spin_lock_irq(&priv->tx_lock);
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	spin_unlock_irq(&priv->tx_lock);
+	free_irq(priv->pdev->irq, hw);
+
+	/* Stop finalize join worker */
+	cancel_work_sync(&priv->finalize_join_worker);
+	if (priv->beacon_skb != NULL)
+		dev_kfree_skb(priv->beacon_skb);
+
+	/* Stop tx reclaim tasklet */
+	tasklet_disable(&priv->tx_reclaim_task);
+
+	/* Stop config thread */
+	flush_workqueue(priv->config_wq);
+
+	/* Return all skbs to mac80211 */
+	for (i = 0; i < MWL8K_TX_QUEUES; i++)
+		mwl8k_txq_reclaim(hw, i, 1);
+}
+
+static int mwl8k_add_interface(struct ieee80211_hw *hw,
+				struct ieee80211_if_init_conf *conf)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mwl8k_vif;
+
+	/*
+	 * We only support one active interface at a time.
+	 */
+	if (priv->vif != NULL)
+		return -EBUSY;
+
+	/*
+	 * We only support managed interfaces for now.
+	 */
+	if (conf->type != NL80211_IFTYPE_STATION &&
+	    conf->type != NL80211_IFTYPE_MONITOR)
+		return -EINVAL;
+
+	/* Clean out driver private area */
+	mwl8k_vif = MWL8K_VIF(conf->vif);
+	memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
+
+	/* Save the mac address */
+	memcpy(mwl8k_vif->mac_addr, conf->mac_addr, IEEE80211_ADDR_LEN);
+
+	/* Back pointer to parent config block */
+	mwl8k_vif->priv = priv;
+
+	/* Setup initial PHY parameters */
+	memcpy(mwl8k_vif->legacy_rates ,
+		priv->rates, sizeof(mwl8k_vif->legacy_rates));
+	mwl8k_vif->legacy_nrates = ARRAY_SIZE(priv->rates);
+
+	/* Set Initial sequence number to zero */
+	mwl8k_vif->seqno = 0;
+
+	priv->vif = conf->vif;
+	priv->current_channel = NULL;
+
+	return 0;
+}
+
+static void mwl8k_remove_interface(struct ieee80211_hw *hw,
+				   struct ieee80211_if_init_conf *conf)
+{
+	struct mwl8k_priv *priv = hw->priv;
+
+	if (priv->vif == NULL)
+		return;
+
+	priv->vif = NULL;
+}
+
+struct mwl8k_config_worker {
+	struct mwl8k_work_struct header;
+	u32 changed;
+};
+
+static int mwl8k_config_wt(struct work_struct *wt)
+{
+	struct mwl8k_config_worker *worker =
+		(struct mwl8k_config_worker *)wt;
+	struct ieee80211_hw *hw = worker->header.hw;
+	struct ieee80211_conf *conf = &hw->conf;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc = 0;
+
+	if (!conf->radio_enabled) {
+		mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE);
+		priv->current_channel = NULL;
+		rc = 0;
+		goto mwl8k_config_exit;
+	}
+
+	if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) {
+		rc = -EINVAL;
+		goto mwl8k_config_exit;
+	}
+
+	priv->current_channel = conf->channel;
+
+	if (mwl8k_cmd_set_rf_channel(hw, conf->channel)) {
+		rc = -EINVAL;
+		goto mwl8k_config_exit;
+	}
+
+	if (conf->power_level > 18)
+		conf->power_level = 18;
+	if (mwl8k_cmd_802_11_rf_tx_power(hw, conf->power_level)) {
+		rc = -EINVAL;
+		goto mwl8k_config_exit;
+	}
+
+	if (mwl8k_cmd_mimo_config(hw, 0x7, 0x7))
+		rc = -EINVAL;
+
+mwl8k_config_exit:
+	return rc;
+}
+
+static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
+{
+	int rc = 0;
+	struct mwl8k_config_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+
+	worker = kzalloc(sizeof(*worker), GFP_KERNEL);
+	if (worker == NULL)
+		return -ENOMEM;
+
+	worker->changed = changed;
+	rc = mwl8k_queue_work(hw, &worker->header,
+			      priv->config_wq, mwl8k_config_wt);
+	if (rc == -ETIMEDOUT) {
+		printk(KERN_ERR "%s() timed out.\n", __func__);
+		rc = -EINVAL;
+	}
+
+	kfree(worker);
+
+	/*
+	 * mac80211 will crash on anything other than -EINVAL on
+	 * error. Looks like wireless extensions which calls mac80211
+	 * may be the actual culprit...
+	 */
+	return rc ? -EINVAL : 0;
+}
+
+static int mwl8k_config_interface(struct ieee80211_hw *hw,
+				  struct ieee80211_vif *vif,
+				  struct ieee80211_if_conf *conf)
+{
+	struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
+	u32 changed = conf->changed;
+
+	if (changed & IEEE80211_IFCC_BSSID)
+		memcpy(mv_vif->bssid, conf->bssid, IEEE80211_ADDR_LEN);
+
+	return 0;
+}
+
+struct mwl8k_bss_info_changed_worker {
+	struct mwl8k_work_struct header;
+	struct ieee80211_vif *vif;
+	struct ieee80211_bss_conf *info;
+	u32 changed;
+};
+
+static int mwl8k_bss_info_changed_wt(struct work_struct *wt)
+{
+	struct mwl8k_bss_info_changed_worker *worker =
+		(struct mwl8k_bss_info_changed_worker *)wt;
+	struct ieee80211_hw *hw = worker->header.hw;
+	struct ieee80211_vif *vif = worker->vif;
+	struct ieee80211_bss_conf *info = worker->info;
+	u32 changed;
+	int rc;
+
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
+
+	changed = worker->changed;
+	priv->capture_beacon = false;
+
+	if (info->assoc) {
+		memcpy(&mwl8k_vif->bss_info, info,
+			sizeof(struct ieee80211_bss_conf));
+
+		/* Install rates */
+		if (mwl8k_update_rateset(hw, vif))
+			goto mwl8k_bss_info_changed_exit;
+
+		/* Turn on rate adaptation */
+		if (mwl8k_cmd_use_fixed_rate(hw, MWL8K_USE_AUTO_RATE,
+			MWL8K_UCAST_RATE, NULL))
+			goto mwl8k_bss_info_changed_exit;
+
+		/* Set radio preamble */
+		if (mwl8k_set_radio_preamble(hw,
+				info->use_short_preamble))
+			goto mwl8k_bss_info_changed_exit;
+
+		/* Set slot time */
+		if (mwl8k_cmd_set_slot(hw, info->use_short_slot ?
+				MWL8K_SHORT_SLOTTIME : MWL8K_LONG_SLOTTIME))
+			goto mwl8k_bss_info_changed_exit;
+
+		/* Update peer rate info */
+		if (mwl8k_cmd_update_sta_db(hw, vif,
+				MWL8K_STA_DB_MODIFY_ENTRY))
+			goto mwl8k_bss_info_changed_exit;
+
+		/* Set AID */
+		if (mwl8k_cmd_set_aid(hw, vif))
+			goto mwl8k_bss_info_changed_exit;
+
+		/*
+		 * Finalize the join.  Tell rx handler to process
+		 * next beacon from our BSSID.
+		 */
+		memcpy(priv->capture_bssid,
+				mwl8k_vif->bssid, IEEE80211_ADDR_LEN);
+		priv->capture_beacon = true;
+	} else {
+		mwl8k_cmd_update_sta_db(hw, vif, MWL8K_STA_DB_DEL_ENTRY);
+		memset(&mwl8k_vif->bss_info, 0,
+			sizeof(struct ieee80211_bss_conf));
+		memset(mwl8k_vif->bssid, 0, IEEE80211_ADDR_LEN);
+	}
+
+mwl8k_bss_info_changed_exit:
+	rc = 0;
+	return rc;
+}
+
+static void mwl8k_bss_info_changed(struct ieee80211_hw *hw,
+				   struct ieee80211_vif *vif,
+				   struct ieee80211_bss_conf *info,
+				   u32 changed)
+{
+	struct mwl8k_bss_info_changed_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+	int rc;
+
+	if ((changed & BSS_CHANGED_ASSOC) == 0)
+		return;
+
+	worker = kzalloc(sizeof(*worker), GFP_KERNEL);
+	if (worker == NULL)
+		return;
+
+	worker->vif = vif;
+	worker->info = info;
+	worker->changed = changed;
+	rc = mwl8k_queue_work(hw, &worker->header,
+			      priv->config_wq,
+			      mwl8k_bss_info_changed_wt);
+	kfree(worker);
+	if (rc == -ETIMEDOUT)
+		printk(KERN_ERR "%s() timed out\n", __func__);
+}
+
+struct mwl8k_configure_filter_worker {
+	struct mwl8k_work_struct header;
+	unsigned int changed_flags;
+	unsigned int *total_flags;
+	int mc_count;
+	struct dev_addr_list *mclist;
+};
+
+#define MWL8K_SUPPORTED_IF_FLAGS	FIF_BCN_PRBRESP_PROMISC
+
+static int mwl8k_configure_filter_wt(struct work_struct *wt)
+{
+	struct mwl8k_configure_filter_worker *worker =
+		(struct mwl8k_configure_filter_worker *)wt;
+
+	struct ieee80211_hw *hw = worker->header.hw;
+	unsigned int changed_flags = worker->changed_flags;
+	unsigned int *total_flags = worker->total_flags;
+	int mc_count = worker->mc_count;
+	struct dev_addr_list *mclist = worker->mclist;
+
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_vif *mv_vif;
+	int rc = 0;
+
+	if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
+		if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
+			rc = mwl8k_cmd_set_pre_scan(hw);
+		else {
+			mv_vif = MWL8K_VIF(priv->vif);
+			rc = mwl8k_cmd_set_post_scan(hw, mv_vif->bssid);
+		}
+	}
+
+	if (rc)
+		goto mwl8k_configure_filter_exit;
+	if (mc_count) {
+		mc_count = mc_count < priv->num_mcaddrs ?
+				mc_count : priv->num_mcaddrs;
+		rc = mwl8k_cmd_mac_multicast_adr(hw, mc_count, mclist);
+		if (rc)
+			printk(KERN_ERR
+			"%s()Error setting multicast addresses\n",
+			__func__);
+	}
+
+mwl8k_configure_filter_exit:
+	return rc;
+}
+
+static void mwl8k_configure_filter(struct ieee80211_hw *hw,
+				   unsigned int changed_flags,
+				   unsigned int *total_flags,
+				   int mc_count,
+				   struct dev_addr_list *mclist)
+{
+
+	struct mwl8k_configure_filter_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+
+	/* Clear unsupported feature flags */
+	*total_flags &= MWL8K_SUPPORTED_IF_FLAGS;
+
+	if (!(changed_flags & MWL8K_SUPPORTED_IF_FLAGS) && !mc_count)
+		return;
+
+	worker = kzalloc(sizeof(*worker), GFP_ATOMIC);
+	if (worker == NULL)
+		return;
+
+	worker->header.options = MWL8K_WQ_QUEUE_ONLY | MWL8K_WQ_TX_WAIT_EMPTY;
+	worker->changed_flags = changed_flags;
+	worker->total_flags = total_flags;
+	worker->mc_count = mc_count;
+	worker->mclist = mclist;
+
+	mwl8k_queue_work(hw, &worker->header, priv->config_wq,
+			 mwl8k_configure_filter_wt);
+}
+
+struct mwl8k_set_rts_threshold_worker {
+	struct mwl8k_work_struct header;
+	u32 value;
+};
+
+static int mwl8k_set_rts_threshold_wt(struct work_struct *wt)
+{
+	struct mwl8k_set_rts_threshold_worker *worker =
+		(struct mwl8k_set_rts_threshold_worker *)wt;
+
+	struct ieee80211_hw *hw = worker->header.hw;
+	u16 threshold = (u16)(worker->value);
+	int rc;
+
+	rc = mwl8k_rts_threshold(hw, MWL8K_CMD_SET, &threshold);
+
+	return rc;
+}
+
+static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
+{
+	int rc;
+	struct mwl8k_set_rts_threshold_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+
+	worker = kzalloc(sizeof(*worker), GFP_KERNEL);
+	if (worker == NULL)
+		return -ENOMEM;
+
+	worker->value = value;
+
+	rc = mwl8k_queue_work(hw, &worker->header,
+			      priv->config_wq,
+			      mwl8k_set_rts_threshold_wt);
+	kfree(worker);
+
+	if (rc == -ETIMEDOUT) {
+		printk(KERN_ERR "%s() timed out\n", __func__);
+		rc = -EINVAL;
+	}
+
+	return rc;
+}
+
+struct mwl8k_conf_tx_worker {
+	struct mwl8k_work_struct header;
+	u16 queue;
+	const struct ieee80211_tx_queue_params *params;
+};
+
+static int mwl8k_conf_tx_wt(struct work_struct *wt)
+{
+	struct mwl8k_conf_tx_worker *worker =
+	(struct mwl8k_conf_tx_worker *)wt;
+
+	struct ieee80211_hw *hw = worker->header.hw;
+	u16 queue = worker->queue;
+	const struct ieee80211_tx_queue_params *params = worker->params;
+
+	struct mwl8k_priv *priv = hw->priv;
+	int rc = 0;
+
+	if (priv->wmm_mode == MWL8K_WMM_DISABLE)
+		if (mwl8k_set_wmm(hw, MWL8K_WMM_ENABLE)) {
+			rc = -EINVAL;
+			goto mwl8k_conf_tx_exit;
+	}
+
+	if (mwl8k_set_edca_params(hw, GET_TXQ(queue), params->cw_min,
+		params->cw_max, params->aifs, params->txop))
+			rc = -EINVAL;
+mwl8k_conf_tx_exit:
+	return rc;
+}
+
+static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue,
+			 const struct ieee80211_tx_queue_params *params)
+{
+	int rc;
+	struct mwl8k_conf_tx_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+
+	worker = kzalloc(sizeof(*worker), GFP_KERNEL);
+	if (worker == NULL)
+		return -ENOMEM;
+
+	worker->queue = queue;
+	worker->params = params;
+	rc = mwl8k_queue_work(hw, &worker->header,
+			      priv->config_wq, mwl8k_conf_tx_wt);
+	kfree(worker);
+	if (rc == -ETIMEDOUT) {
+		printk(KERN_ERR "%s() timed out\n", __func__);
+		rc = -EINVAL;
+	}
+	return rc;
+}
+
+static int mwl8k_get_tx_stats(struct ieee80211_hw *hw,
+			      struct ieee80211_tx_queue_stats *stats)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	struct mwl8k_tx_queue *txq;
+	int index;
+
+	spin_lock_bh(&priv->tx_lock);
+	for (index = 0; index < MWL8K_TX_QUEUES; index++) {
+		txq = priv->txq + index;
+		memcpy(&stats[index], &txq->tx_stats,
+			sizeof(struct ieee80211_tx_queue_stats));
+	}
+	spin_unlock_bh(&priv->tx_lock);
+	return 0;
+}
+
+struct mwl8k_get_stats_worker {
+	struct mwl8k_work_struct header;
+	struct ieee80211_low_level_stats *stats;
+};
+
+static int mwl8k_get_stats_wt(struct work_struct *wt)
+{
+	struct mwl8k_get_stats_worker *worker =
+		(struct mwl8k_get_stats_worker *)wt;
+
+	return mwl8k_cmd_802_11_get_stat(worker->header.hw, worker->stats);
+}
+
+static int mwl8k_get_stats(struct ieee80211_hw *hw,
+			   struct ieee80211_low_level_stats *stats)
+{
+	int rc;
+	struct mwl8k_get_stats_worker *worker;
+	struct mwl8k_priv *priv = hw->priv;
+
+	worker = kzalloc(sizeof(*worker), GFP_KERNEL);
+	if (worker == NULL)
+		return -ENOMEM;
+
+	worker->stats = stats;
+	rc = mwl8k_queue_work(hw, &worker->header,
+			      priv->config_wq, mwl8k_get_stats_wt);
+
+	kfree(worker);
+	if (rc == -ETIMEDOUT) {
+		printk(KERN_ERR "%s() timed out\n", __func__);
+		rc = -EINVAL;
+	}
+
+	return rc;
+}
+
+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,
+	.config_interface	= mwl8k_config_interface,
+	.bss_info_changed	= mwl8k_bss_info_changed,
+	.configure_filter	= mwl8k_configure_filter,
+	.set_rts_threshold	= mwl8k_set_rts_threshold,
+	.conf_tx		= mwl8k_conf_tx,
+	.get_tx_stats		= mwl8k_get_tx_stats,
+	.get_stats		= mwl8k_get_stats,
+};
+
+static void mwl8k_tx_reclaim_handler(unsigned long data)
+{
+	int i;
+	struct ieee80211_hw *hw = (struct ieee80211_hw *) data;
+	struct mwl8k_priv *priv = hw->priv;
+
+	spin_lock_bh(&priv->tx_lock);
+	for (i = 0; i < MWL8K_TX_QUEUES; i++)
+		mwl8k_txq_reclaim(hw, i, 0);
+
+	if (priv->tx_wait != NULL) {
+		int count = mwl8k_txq_busy(priv);
+		if (count == 0) {
+			complete(priv->tx_wait);
+			priv->tx_wait = NULL;
+		}
+	}
+	spin_unlock_bh(&priv->tx_lock);
+}
+
+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;
+	u8 dtim = (MWL8K_VIF(priv->vif))->bss_info.dtim_period;
+
+	mwl8k_finalize_join(priv->hw, skb->data, skb->len, dtim);
+	dev_kfree_skb(skb);
+
+	priv->beacon_skb = NULL;
+}
+
+static int __devinit mwl8k_probe(struct pci_dev *pdev,
+				 const struct pci_device_id *id)
+{
+	struct ieee80211_hw *hw;
+	struct mwl8k_priv *priv;
+	DECLARE_MAC_BUF(mac);
+	int rc;
+	int i;
+	u8 *fw;
+
+	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);
+		return rc;
+	}
+
+	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;
+	}
+
+	priv = hw->priv;
+	priv->hw = hw;
+	priv->pdev = pdev;
+	priv->hostcmd_wait = NULL;
+	priv->tx_wait = NULL;
+	priv->inconfig = false;
+	priv->wep_enabled = 0;
+	priv->wmm_mode = false;
+	priv->pending_tx_pkts = 0;
+	strncpy(priv->name, MWL8K_NAME, sizeof(priv->name));
+
+	spin_lock_init(&priv->fw_lock);
+
+	SET_IEEE80211_DEV(hw, &pdev->dev);
+	pci_set_drvdata(pdev, hw);
+
+	priv->regs = pci_iomap(pdev, 1, 0x10000);
+	if (priv->regs == NULL) {
+		printk(KERN_ERR "%s: Cannot map device memory\n", priv->name);
+		goto err_iounmap;
+	}
+
+	memcpy(priv->channels, mwl8k_channels, sizeof(mwl8k_channels));
+	priv->band.band = IEEE80211_BAND_2GHZ;
+	priv->band.channels = priv->channels;
+	priv->band.n_channels = ARRAY_SIZE(mwl8k_channels);
+	priv->band.bitrates = priv->rates;
+	priv->band.n_bitrates = ARRAY_SIZE(mwl8k_rates);
+	hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
+
+	BUILD_BUG_ON(sizeof(priv->rates) != sizeof(mwl8k_rates));
+	memcpy(priv->rates, mwl8k_rates, sizeof(mwl8k_rates));
+
+	/*
+	 * 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->channel_change_time = 10;
+
+	hw->queues = MWL8K_TX_QUEUES;
+
+	hw->wiphy->interface_modes =
+		BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_MONITOR);
+
+	/* Set rssi and noise values to dBm */
+	hw->flags |= (IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM);
+	hw->vif_data_size = sizeof(struct mwl8k_vif);
+	priv->vif = NULL;
+
+	/* Set default radio state and preamble */
+	priv->radio_preamble = MWL8K_RADIO_DEFAULT_PREAMBLE;
+	priv->radio_state = MWL8K_RADIO_DISABLE;
+
+	/* Finalize join worker */
+	INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
+
+	/* TX reclaim tasklet */
+	tasklet_init(&priv->tx_reclaim_task,
+			mwl8k_tx_reclaim_handler, (unsigned long)hw);
+	tasklet_disable(&priv->tx_reclaim_task);
+
+	/* Config workthread */
+	priv->config_wq = create_singlethread_workqueue("mwl8k_config");
+	if (priv->config_wq == NULL)
+		goto err_iounmap;
+
+	/* Power management cookie */
+	priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
+	if (priv->cookie == NULL)
+		goto err_iounmap;
+
+	rc = mwl8k_rxq_init(hw, 0);
+	if (rc)
+		goto err_iounmap;
+	rxq_refill(hw, 0, INT_MAX);
+
+	spin_lock_init(&priv->tx_lock);
+
+	for (i = 0; i < MWL8K_TX_QUEUES; i++) {
+		rc = mwl8k_txq_init(hw, i);
+		if (rc)
+			goto err_free_queues;
+	}
+
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
+	priv->int_mask = 0;
+	iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
+	iowrite32(0xffffffff, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
+
+	rc = request_irq(priv->pdev->irq, &mwl8k_interrupt,
+			 IRQF_SHARED, MWL8K_NAME, hw);
+	if (rc) {
+		printk(KERN_ERR "%s: failed to register IRQ handler\n",
+		       priv->name);
+		goto err_free_queues;
+	}
+
+	/* Reset firmware and hardware */
+	mwl8k_hw_reset(priv);
+
+	/* Ask userland hotplug daemon for the device firmware */
+	rc = mwl8k_request_firmware(priv, (u32)id->driver_data);
+	if (rc) {
+		printk(KERN_ERR "%s: Firmware files not found\n", priv->name);
+		goto err_free_irq;
+	}
+
+	/* Load firmware into hardware */
+	rc = mwl8k_load_firmware(priv);
+	if (rc) {
+		printk(KERN_ERR "%s: Cannot start firmware\n", priv->name);
+		goto err_stop_firmware;
+	}
+
+	/* Reclaim memory once firmware is successfully loaded */
+	mwl8k_release_firmware(priv);
+
+	/*
+	 * Temporarily enable interrupts.  Initial firmware host
+	 * commands use interrupts and avoids polling.  Disable
+	 * interrupts when done.
+	 */
+	priv->int_mask |= MWL8K_A2H_EVENTS;
+
+	iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+
+	/* Get config data, mac addrs etc */
+	rc = mwl8k_cmd_get_hw_spec(hw);
+	if (rc) {
+		printk(KERN_ERR "%s: Cannot initialise firmware\n", priv->name);
+		goto err_stop_firmware;
+	}
+
+	/* Turn radio off */
+	rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE);
+	if (rc) {
+		printk(KERN_ERR "%s: Cannot disable\n", priv->name);
+		goto err_stop_firmware;
+	}
+
+	/* Disable interrupts */
+	spin_lock_irq(&priv->tx_lock);
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	spin_unlock_irq(&priv->tx_lock);
+	free_irq(priv->pdev->irq, hw);
+
+	rc = ieee80211_register_hw(hw);
+	if (rc) {
+		printk(KERN_ERR "%s: Cannot register device\n", priv->name);
+		goto err_stop_firmware;
+	}
+
+	fw = (u8 *)&priv->fw_rev;
+	printk(KERN_INFO "%s: 88W%u %s\n", priv->name, priv->part_num,
+		MWL8K_DESC);
+	printk(KERN_INFO "%s: Driver Ver:%s  Firmware Ver:%u.%u.%u.%u\n",
+		priv->name, MWL8K_VERSION, fw[3], fw[2], fw[1], fw[0]);
+	printk(KERN_INFO "%s: MAC Address: %s\n", priv->name,
+	       print_mac(mac, hw->wiphy->perm_addr));
+
+	return 0;
+
+err_stop_firmware:
+	mwl8k_hw_reset(priv);
+	mwl8k_release_firmware(priv);
+
+err_free_irq:
+	spin_lock_irq(&priv->tx_lock);
+	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
+	spin_unlock_irq(&priv->tx_lock);
+	free_irq(priv->pdev->irq, hw);
+
+err_free_queues:
+	for (i = 0; i < MWL8K_TX_QUEUES; i++)
+		mwl8k_txq_deinit(hw, i);
+	mwl8k_rxq_deinit(hw, 0);
+
+err_iounmap:
+	if (priv->cookie != NULL)
+		pci_free_consistent(priv->pdev, 4,
+				priv->cookie, priv->cookie_dma);
+
+	if (priv->regs != NULL)
+		pci_iounmap(pdev, priv->regs);
+
+	if (priv->config_wq != NULL)
+		destroy_workqueue(priv->config_wq);
+
+	pci_set_drvdata(pdev, NULL);
+	ieee80211_free_hw(hw);
+
+err_free_reg:
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+
+	return rc;
+}
+
+static void __devexit mwl8k_remove(struct pci_dev *pdev)
+{
+	printk(KERN_ERR "===>%s(%u)\n", __func__, __LINE__);
+}
+
+static void __devexit mwl8k_shutdown(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;
+
+	ieee80211_stop_queues(hw);
+
+	/* Remove tx reclaim tasklet */
+	tasklet_kill(&priv->tx_reclaim_task);
+
+	/* Stop config thread */
+	destroy_workqueue(priv->config_wq);
+
+	/* Stop hardware */
+	mwl8k_hw_reset(priv);
+
+	/* Return all skbs to mac80211 */
+	for (i = 0; i < MWL8K_TX_QUEUES; i++)
+		mwl8k_txq_reclaim(hw, i, 1);
+
+	ieee80211_unregister_hw(hw);
+
+	for (i = 0; i < MWL8K_TX_QUEUES; i++)
+		mwl8k_txq_deinit(hw, i);
+
+	mwl8k_rxq_deinit(hw, 0);
+
+	pci_free_consistent(priv->pdev, 4,
+				priv->cookie, priv->cookie_dma);
+
+	pci_iounmap(pdev, priv->regs);
+	pci_set_drvdata(pdev, NULL);
+	ieee80211_free_hw(hw);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+}
+
+static struct pci_driver mwl8k_driver = {
+	.name		= MWL8K_NAME,
+	.id_table	= mwl8k_table,
+	.probe		= mwl8k_probe,
+	.remove		= __devexit_p(mwl8k_remove),
+	.shutdown	= __devexit_p(mwl8k_shutdown),
+};
+
+static int __init mwl8k_init(void)
+{
+	return pci_register_driver(&mwl8k_driver);
+}
+
+static void __exit mwl8k_exit(void)
+{
+	pci_unregister_driver(&mwl8k_driver);
+}
+
+module_init(mwl8k_init);
+module_exit(mwl8k_exit);