]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
mwl8k: Marvell TOPDOG wireless driver
authorLennert Buytenhek <buytenh@wantstofly.org>
Tue, 10 Mar 2009 09:13:33 +0000 (10:13 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 16 Mar 2009 22:09:43 +0000 (18:09 -0400)
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>
drivers/net/wireless/Kconfig
drivers/net/wireless/Makefile
drivers/net/wireless/mwl8k.c [new file with mode: 0644]

index 1294175cab2099c3eb8449c56067d0d6b9498a24..612fffe100a68f19274d50bf5c0526f617e2d75d 100644 (file)
@@ -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"
index e2574cafe051d6978b85a9bec91e79386e4fae42..d780487c420f69126e691ebf69d3ac760b0eeedb 100644 (file)
@@ -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 (file)
index 0000000..57a0268
--- /dev/null
@@ -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);