[linux-block.git] / drivers / staging / wlan-ng / hfa384x_usb.c

/* src/prism2/driver/hfa384x_usb.c
*
* Functions that talk to the USB variantof the Intersil hfa384x MAC
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
*   The contents of this file are subject to the Mozilla Public
*   License Version 1.1 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.mozilla.org/MPL/
*
*   Software distributed under the License is distributed on an "AS
*   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
*   implied. See the License for the specific language governing
*   rights and limitations under the License.
*
*   Alternatively, the contents of this file may be used under the
*   terms of the GNU Public License version 2 (the "GPL"), in which
*   case the provisions of the GPL are applicable instead of the
*   above.  If you wish to allow the use of your version of this file
*   only under the terms of the GPL and not to allow others to use
*   your version of this file under the MPL, indicate your decision
*   by deleting the provisions above and replace them with the notice
*   and other provisions required by the GPL.  If you do not delete
*   the provisions above, a recipient may use your version of this
*   file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the linux-wlan Open Source project can be
* made directly to:
*
* AbsoluteValue Systems Inc.
* info@linux-wlan.com
* http://www.linux-wlan.com
*
* --------------------------------------------------------------------
*
* Portions of the development of this software were funded by
* Intersil Corporation as part of PRISM(R) chipset product development.
*
* --------------------------------------------------------------------
*
* This file implements functions that correspond to the prism2/hfa384x
* 802.11 MAC hardware and firmware host interface.
*
* The functions can be considered to represent several levels of
* abstraction.  The lowest level functions are simply C-callable wrappers
* around the register accesses.  The next higher level represents C-callable
* prism2 API functions that match the Intersil documentation as closely
* as is reasonable.  The next higher layer implements common sequences
* of invokations of the API layer (e.g. write to bap, followed by cmd).
*
* Common sequences:
* hfa384x_drvr_xxx	Highest level abstractions provided by the
*			hfa384x code.  They are driver defined wrappers
*			for common sequences.  These functions generally
*			use the services of the lower levels.
*
* hfa384x_drvr_xxxconfig  An example of the drvr level abstraction. These
*			functions are wrappers for the RID get/set
*			sequence. They 	call copy_[to|from]_bap() and
*			cmd_access().	These functions operate on the
*			RIDs and buffers without validation.  The caller
*			is responsible for that.
*
* API wrapper functions:
* hfa384x_cmd_xxx	functions that provide access to the f/w commands.
*			The function arguments correspond to each command
*			argument, even command arguments that get packed
*			into single registers.  These functions _just_
*			issue the command by setting the cmd/parm regs
*			& reading the status/resp regs.  Additional
*			activities required to fully use a command
*			(read/write from/to bap, get/set int status etc.)
*			are implemented separately.  Think of these as
*			C-callable prism2 commands.
*
* Lowest Layer Functions:
* hfa384x_docmd_xxx	These functions implement the sequence required
*			to issue any prism2 command.  Primarily used by the
*			hfa384x_cmd_xxx functions.
*
* hfa384x_bap_xxx	BAP read/write access functions.
*			Note: we usually use BAP0 for non-interrupt context
*			 and BAP1 for interrupt context.
*
* hfa384x_dl_xxx	download related functions.
*
* Driver State Issues:
* Note that there are two pairs of functions that manage the
* 'initialized' and 'running' states of the hw/MAC combo.  The four
* functions are create(), destroy(), start(), and stop().  create()
* sets up the data structures required to support the hfa384x_*
* functions and destroy() cleans them up.  The start() function gets
* the actual hardware running and enables the interrupts.  The stop()
* function shuts the hardware down.  The sequence should be:
* create()
* start()
*  .
*  .  Do interesting things w/ the hardware
*  .
* stop()
* destroy()
*
* Note that destroy() can be called without calling stop() first.
* --------------------------------------------------------------------
*/

/*================================================================*/
/* System Includes */

#include <linux/version.h>

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/timer.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <asm/byteorder.h>
#include <asm/bitops.h>
#include <linux/list.h>
#include <linux/usb.h>
#include <linux/byteorder/generic.h>

#include "wlan_compat.h"

#define SUBMIT_URB(u,f)  usb_submit_urb(u,f)

/*================================================================*/
/* Project Includes */

#include "p80211types.h"
#include "p80211hdr.h"
#include "p80211mgmt.h"
#include "p80211conv.h"
#include "p80211msg.h"
#include "p80211netdev.h"
#include "p80211req.h"
#include "p80211metadef.h"
#include "p80211metastruct.h"
#include "hfa384x.h"
#include "prism2mgmt.h"

/*================================================================*/
/* Local Constants */

enum cmd_mode
{
  DOWAIT = 0,
  DOASYNC
};
typedef enum cmd_mode CMD_MODE;

#define THROTTLE_JIFFIES	(HZ/8)
#define URB_ASYNC_UNLINK 0
#define USB_QUEUE_BULK 0

/*================================================================*/
/* Local Macros */

#define ROUNDUP64(a) (((a)+63)&~63)

/*================================================================*/
/* Local Function Declarations */

#ifdef DEBUG_USB
static void
dbprint_urb(struct urb* urb);
#endif

static void
hfa384x_int_rxmonitor(
	wlandevice_t *wlandev,
	hfa384x_usb_rxfrm_t *rxfrm);

static void
hfa384x_usb_defer(struct work_struct *data);

static int
submit_rx_urb(hfa384x_t *hw, gfp_t flags);

static int
submit_tx_urb(hfa384x_t *hw, struct urb *tx_urb, gfp_t flags);

/*---------------------------------------------------*/
/* Callbacks */
static void
hfa384x_usbout_callback(struct urb *urb);
static void
hfa384x_ctlxout_callback(struct urb *urb);
static void
hfa384x_usbin_callback(struct urb *urb);

static void
hfa384x_usbin_txcompl(wlandevice_t *wlandev, hfa384x_usbin_t *usbin);

static void
hfa384x_usbin_rx(wlandevice_t *wlandev, struct sk_buff *skb);

static void
hfa384x_usbin_info(wlandevice_t *wlandev, hfa384x_usbin_t *usbin);

static void
hfa384x_usbout_tx(wlandevice_t *wlandev, hfa384x_usbout_t *usbout);

static void hfa384x_usbin_ctlx(hfa384x_t *hw, hfa384x_usbin_t *usbin,
			       int urb_status);

/*---------------------------------------------------*/
/* Functions to support the prism2 usb command queue */

static void
hfa384x_usbctlxq_run(hfa384x_t *hw);

static void
hfa384x_usbctlx_reqtimerfn(unsigned long data);

static void
hfa384x_usbctlx_resptimerfn(unsigned long data);

static void
hfa384x_usb_throttlefn(unsigned long data);

static void
hfa384x_usbctlx_completion_task(unsigned long data);

static void
hfa384x_usbctlx_reaper_task(unsigned long data);

static int
hfa384x_usbctlx_submit(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx);

static void
unlocked_usbctlx_complete(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx);

struct usbctlx_completor
{
	int (*complete)(struct usbctlx_completor*);
};
typedef struct usbctlx_completor usbctlx_completor_t;

static int
hfa384x_usbctlx_complete_sync(hfa384x_t *hw,
                              hfa384x_usbctlx_t *ctlx,
                              usbctlx_completor_t *completor);

static int
unlocked_usbctlx_cancel_async(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx);

static void
hfa384x_cb_status(hfa384x_t *hw, const hfa384x_usbctlx_t *ctlx);

static void
hfa384x_cb_rrid(hfa384x_t *hw, const hfa384x_usbctlx_t *ctlx);

static int
usbctlx_get_status(const hfa384x_usb_cmdresp_t *cmdresp,
                   hfa384x_cmdresult_t *result);

static void
usbctlx_get_rridresult(const hfa384x_usb_rridresp_t *rridresp,
                       hfa384x_rridresult_t *result);

/*---------------------------------------------------*/
/* Low level req/resp CTLX formatters and submitters */
static int
hfa384x_docmd(
	hfa384x_t *hw,
	CMD_MODE mode,
	hfa384x_metacmd_t *cmd,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data);

static int
hfa384x_dorrid(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	rid,
	void	*riddata,
	unsigned int	riddatalen,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data);

static int
hfa384x_dowrid(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	rid,
	void	*riddata,
	unsigned int	riddatalen,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data);

static int
hfa384x_dormem(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	page,
	u16	offset,
	void	*data,
	unsigned int	len,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data);

static int
hfa384x_dowmem(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	page,
	u16	offset,
	void	*data,
	unsigned int	len,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data);

static int
hfa384x_isgood_pdrcode(u16 pdrcode);

/*================================================================*/
/* Function Definitions */
static inline const char* ctlxstr(CTLX_STATE s)
{
	static const char* ctlx_str[] = {
		"Initial state",
		"Complete",
		"Request failed",
		"Request pending",
		"Request packet submitted",
		"Request packet completed",
		"Response packet completed"
	};

	return ctlx_str[s];
};


static inline hfa384x_usbctlx_t*
get_active_ctlx(hfa384x_t *hw)
{
	return list_entry(hw->ctlxq.active.next, hfa384x_usbctlx_t, list);
}


#ifdef DEBUG_USB
void
dbprint_urb(struct urb* urb)
{
	pr_debug("urb->pipe=0x%08x\n", urb->pipe);
	pr_debug("urb->status=0x%08x\n", urb->status);
	pr_debug("urb->transfer_flags=0x%08x\n", urb->transfer_flags);
	pr_debug("urb->transfer_buffer=0x%08x\n", (unsigned int)urb->transfer_buffer);
	pr_debug("urb->transfer_buffer_length=0x%08x\n", urb->transfer_buffer_length);
	pr_debug("urb->actual_length=0x%08x\n", urb->actual_length);
	pr_debug("urb->bandwidth=0x%08x\n", urb->bandwidth);
	pr_debug("urb->setup_packet(ctl)=0x%08x\n", (unsigned int)urb->setup_packet);
	pr_debug("urb->start_frame(iso/irq)=0x%08x\n", urb->start_frame);
	pr_debug("urb->interval(irq)=0x%08x\n", urb->interval);
	pr_debug("urb->error_count(iso)=0x%08x\n", urb->error_count);
	pr_debug("urb->timeout=0x%08x\n", urb->timeout);
	pr_debug("urb->context=0x%08x\n", (unsigned int)urb->context);
	pr_debug("urb->complete=0x%08x\n", (unsigned int)urb->complete);
}
#endif


/*----------------------------------------------------------------
* submit_rx_urb
*
* Listen for input data on the BULK-IN pipe. If the pipe has
* stalled then schedule it to be reset.
*
* Arguments:
*	hw		device struct
*	memflags	memory allocation flags
*
* Returns:
*	error code from submission
*
* Call context:
*	Any
----------------------------------------------------------------*/
static int
submit_rx_urb(hfa384x_t *hw, gfp_t memflags)
{
	struct sk_buff *skb;
	int result;

	skb = dev_alloc_skb(sizeof(hfa384x_usbin_t));
	if (skb == NULL) {
		result = -ENOMEM;
		goto done;
	}

	/* Post the IN urb */
	usb_fill_bulk_urb(&hw->rx_urb, hw->usb,
	              hw->endp_in,
	              skb->data, sizeof(hfa384x_usbin_t),
	              hfa384x_usbin_callback, hw->wlandev);

	hw->rx_urb_skb = skb;

	result = -ENOLINK;
	if ( !hw->wlandev->hwremoved && !test_bit(WORK_RX_HALT, &hw->usb_flags)) {
		result = SUBMIT_URB(&hw->rx_urb, memflags);

		/* Check whether we need to reset the RX pipe */
		if (result == -EPIPE) {
			printk(KERN_WARNING "%s rx pipe stalled: requesting reset\n",
			                 hw->wlandev->netdev->name);
			if ( !test_and_set_bit(WORK_RX_HALT, &hw->usb_flags) )
				schedule_work(&hw->usb_work);
		}
	}

	/* Don't leak memory if anything should go wrong */
	if (result != 0) {
		dev_kfree_skb(skb);
		hw->rx_urb_skb = NULL;
	}

 done:
	return result;
}

/*----------------------------------------------------------------
* submit_tx_urb
*
* Prepares and submits the URB of transmitted data. If the
* submission fails then it will schedule the output pipe to
* be reset.
*
* Arguments:
*	hw		device struct
*	tx_urb		URB of data for tranmission
*	memflags	memory allocation flags
*
* Returns:
*	error code from submission
*
* Call context:
*	Any
----------------------------------------------------------------*/
static int
submit_tx_urb(hfa384x_t *hw, struct urb *tx_urb, gfp_t memflags)
{
	struct net_device *netdev = hw->wlandev->netdev;
	int result;

	result = -ENOLINK;
	if ( netif_running(netdev) ) {

		if ( !hw->wlandev->hwremoved && !test_bit(WORK_TX_HALT, &hw->usb_flags) ) {
			result = SUBMIT_URB(tx_urb, memflags);

			/* Test whether we need to reset the TX pipe */
			if (result == -EPIPE) {
				printk(KERN_WARNING "%s tx pipe stalled: requesting reset\n",
				                 netdev->name);
				set_bit(WORK_TX_HALT, &hw->usb_flags);
				schedule_work(&hw->usb_work);
			} else if (result == 0) {
				netif_stop_queue(netdev);
			}
		}
	}

	return result;
}

/*----------------------------------------------------------------
* hfa394x_usb_defer
*
* There are some things that the USB stack cannot do while
* in interrupt context, so we arrange this function to run
* in process context.
*
* Arguments:
*	hw	device structure
*
* Returns:
*	nothing
*
* Call context:
*	process (by design)
----------------------------------------------------------------*/
static void
hfa384x_usb_defer(struct work_struct *data)
{
	hfa384x_t *hw = container_of(data, struct hfa384x, usb_work);
	struct net_device *netdev = hw->wlandev->netdev;

	/* Don't bother trying to reset anything if the plug
	 * has been pulled ...
	 */
	if ( hw->wlandev->hwremoved ) {
		return;
	}

	/* Reception has stopped: try to reset the input pipe */
	if (test_bit(WORK_RX_HALT, &hw->usb_flags)) {
		int ret;

		usb_kill_urb(&hw->rx_urb);  /* Cannot be holding spinlock! */

		ret = usb_clear_halt(hw->usb, hw->endp_in);
		if (ret != 0) {
			printk(KERN_ERR
			       "Failed to clear rx pipe for %s: err=%d\n",
			       netdev->name, ret);
		} else {
			printk(KERN_INFO "%s rx pipe reset complete.\n",
			                 netdev->name);
			clear_bit(WORK_RX_HALT, &hw->usb_flags);
			set_bit(WORK_RX_RESUME, &hw->usb_flags);
		}
	}

	/* Resume receiving data back from the device. */
	if ( test_bit(WORK_RX_RESUME, &hw->usb_flags) ) {
		int ret;

		ret = submit_rx_urb(hw, GFP_KERNEL);
		if (ret != 0) {
			printk(KERN_ERR
			       "Failed to resume %s rx pipe.\n", netdev->name);
		} else {
			clear_bit(WORK_RX_RESUME, &hw->usb_flags);
		}
	}

	/* Transmission has stopped: try to reset the output pipe */
	if (test_bit(WORK_TX_HALT, &hw->usb_flags)) {
		int ret;

		usb_kill_urb(&hw->tx_urb);
		ret = usb_clear_halt(hw->usb, hw->endp_out);
		if (ret != 0) {
			printk(KERN_ERR
			       "Failed to clear tx pipe for %s: err=%d\n",
			       netdev->name, ret);
		} else {
			printk(KERN_INFO "%s tx pipe reset complete.\n",
			                 netdev->name);
			clear_bit(WORK_TX_HALT, &hw->usb_flags);
			set_bit(WORK_TX_RESUME, &hw->usb_flags);

			/* Stopping the BULK-OUT pipe also blocked
			 * us from sending any more CTLX URBs, so
			 * we need to re-run our queue ...
			 */
			hfa384x_usbctlxq_run(hw);
		}
	}

	/* Resume transmitting. */
	if ( test_and_clear_bit(WORK_TX_RESUME, &hw->usb_flags) ) {
		netif_wake_queue(hw->wlandev->netdev);
	}
}


/*----------------------------------------------------------------
* hfa384x_create
*
* Sets up the hfa384x_t data structure for use.  Note this
* does _not_ intialize the actual hardware, just the data structures
* we use to keep track of its state.
*
* Arguments:
*	hw		device structure
*	irq		device irq number
*	iobase		i/o base address for register access
*	membase		memory base address for register access
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
void
hfa384x_create( hfa384x_t *hw, struct usb_device *usb)
{
	memset(hw, 0, sizeof(hfa384x_t));
	hw->usb = usb;

	/* set up the endpoints */
	hw->endp_in = usb_rcvbulkpipe(usb, 1);
	hw->endp_out = usb_sndbulkpipe(usb, 2);

	/* Set up the waitq */
	init_waitqueue_head(&hw->cmdq);

	/* Initialize the command queue */
	spin_lock_init(&hw->ctlxq.lock);
	INIT_LIST_HEAD(&hw->ctlxq.pending);
	INIT_LIST_HEAD(&hw->ctlxq.active);
	INIT_LIST_HEAD(&hw->ctlxq.completing);
	INIT_LIST_HEAD(&hw->ctlxq.reapable);

	/* Initialize the authentication queue */
	skb_queue_head_init(&hw->authq);

	tasklet_init(&hw->reaper_bh,
	             hfa384x_usbctlx_reaper_task,
	             (unsigned long)hw);
	tasklet_init(&hw->completion_bh,
	             hfa384x_usbctlx_completion_task,
	             (unsigned long)hw);
	INIT_WORK(&hw->link_bh, prism2sta_processing_defer);
	INIT_WORK(&hw->usb_work, hfa384x_usb_defer);

	init_timer(&hw->throttle);
	hw->throttle.function = hfa384x_usb_throttlefn;
	hw->throttle.data = (unsigned long)hw;

	init_timer(&hw->resptimer);
	hw->resptimer.function = hfa384x_usbctlx_resptimerfn;
	hw->resptimer.data = (unsigned long)hw;

	init_timer(&hw->reqtimer);
	hw->reqtimer.function = hfa384x_usbctlx_reqtimerfn;
	hw->reqtimer.data = (unsigned long)hw;

	usb_init_urb(&hw->rx_urb);
	usb_init_urb(&hw->tx_urb);
	usb_init_urb(&hw->ctlx_urb);

	hw->link_status = HFA384x_LINK_NOTCONNECTED;
	hw->state = HFA384x_STATE_INIT;

        INIT_WORK(&hw->commsqual_bh, prism2sta_commsqual_defer);
	init_timer(&hw->commsqual_timer);
	hw->commsqual_timer.data = (unsigned long) hw;
	hw->commsqual_timer.function = prism2sta_commsqual_timer;
}


/*----------------------------------------------------------------
* hfa384x_destroy
*
* Partner to hfa384x_create().  This function cleans up the hw
* structure so that it can be freed by the caller using a simple
* kfree.  Currently, this function is just a placeholder.  If, at some
* point in the future, an hw in the 'shutdown' state requires a 'deep'
* kfree, this is where it should be done.  Note that if this function
* is called on a _running_ hw structure, the drvr_stop() function is
* called.
*
* Arguments:
*	hw		device structure
*
* Returns:
*	nothing, this function is not allowed to fail.
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
void
hfa384x_destroy( hfa384x_t *hw)
{
	struct sk_buff *skb;

	if ( hw->state == HFA384x_STATE_RUNNING ) {
		hfa384x_drvr_stop(hw);
	}
	hw->state = HFA384x_STATE_PREINIT;

	if (hw->scanresults) {
		kfree(hw->scanresults);
		hw->scanresults = NULL;
	}

	/* Now to clean out the auth queue */
        while ( (skb = skb_dequeue(&hw->authq)) ) {
                dev_kfree_skb(skb);
        }
}


/*----------------------------------------------------------------
 */
static hfa384x_usbctlx_t* usbctlx_alloc(void)
{
	hfa384x_usbctlx_t *ctlx;

	ctlx = kmalloc(sizeof(*ctlx), in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
	if (ctlx != NULL)
	{
		memset(ctlx, 0, sizeof(*ctlx));
		init_completion(&ctlx->done);
	}

	return ctlx;
}


/*----------------------------------------------------------------
 *
----------------------------------------------------------------*/
static int
usbctlx_get_status(const hfa384x_usb_cmdresp_t *cmdresp,
                   hfa384x_cmdresult_t *result)
{
	result->status = hfa384x2host_16(cmdresp->status);
	result->resp0 = hfa384x2host_16(cmdresp->resp0);
	result->resp1 = hfa384x2host_16(cmdresp->resp1);
	result->resp2 = hfa384x2host_16(cmdresp->resp2);

	pr_debug("cmdresult:status=0x%04x "
	                  "resp0=0x%04x resp1=0x%04x resp2=0x%04x\n",
	                result->status,
	                result->resp0,
	                result->resp1,
	                result->resp2);

	return (result->status & HFA384x_STATUS_RESULT);
}

static void
usbctlx_get_rridresult(const hfa384x_usb_rridresp_t *rridresp,
                       hfa384x_rridresult_t *result)
{
	result->rid = hfa384x2host_16(rridresp->rid);
	result->riddata = rridresp->data;
	result->riddata_len = ((hfa384x2host_16(rridresp->frmlen) - 1) * 2);

}


/*----------------------------------------------------------------
* Completor object:
* This completor must be passed to hfa384x_usbctlx_complete_sync()
* when processing a CTLX that returns a hfa384x_cmdresult_t structure.
----------------------------------------------------------------*/
struct usbctlx_cmd_completor
{
	usbctlx_completor_t	head;

	const hfa384x_usb_cmdresp_t	*cmdresp;
	hfa384x_cmdresult_t	*result;
};
typedef struct usbctlx_cmd_completor usbctlx_cmd_completor_t;

static int usbctlx_cmd_completor_fn(usbctlx_completor_t *head)
{
	usbctlx_cmd_completor_t *complete = (usbctlx_cmd_completor_t*)head;
	return usbctlx_get_status(complete->cmdresp, complete->result);
}

static inline usbctlx_completor_t*
init_cmd_completor(usbctlx_cmd_completor_t *completor,
                   const hfa384x_usb_cmdresp_t *cmdresp,
                   hfa384x_cmdresult_t *result)
{
	completor->head.complete = usbctlx_cmd_completor_fn;
	completor->cmdresp = cmdresp;
	completor->result = result;
	return &(completor->head);
}

/*----------------------------------------------------------------
* Completor object:
* This completor must be passed to hfa384x_usbctlx_complete_sync()
* when processing a CTLX that reads a RID.
----------------------------------------------------------------*/
struct usbctlx_rrid_completor
{
	usbctlx_completor_t	head;

	const hfa384x_usb_rridresp_t	*rridresp;
	void			*riddata;
	unsigned int			riddatalen;
};
typedef struct usbctlx_rrid_completor usbctlx_rrid_completor_t;

static int usbctlx_rrid_completor_fn(usbctlx_completor_t *head)
{
	usbctlx_rrid_completor_t *complete = (usbctlx_rrid_completor_t*)head;
	hfa384x_rridresult_t rridresult;

	usbctlx_get_rridresult(complete->rridresp, &rridresult);

	/* Validate the length, note body len calculation in bytes */
	if ( rridresult.riddata_len != complete->riddatalen ) {
		printk(KERN_WARNING
			"RID len mismatch, rid=0x%04x hlen=%d fwlen=%d\n",
		        rridresult.rid,
		        complete->riddatalen,
		        rridresult.riddata_len);
		return -ENODATA;
	}

	memcpy(complete->riddata,
	       rridresult.riddata,
	       complete->riddatalen);
	return 0;
}

static inline usbctlx_completor_t*
init_rrid_completor(usbctlx_rrid_completor_t *completor,
                    const hfa384x_usb_rridresp_t *rridresp,
                    void *riddata,
                    unsigned int riddatalen)
{
	completor->head.complete = usbctlx_rrid_completor_fn;
	completor->rridresp = rridresp;
	completor->riddata = riddata;
	completor->riddatalen = riddatalen;
	return &(completor->head);
}

/*----------------------------------------------------------------
* Completor object:
* Interprets the results of a synchronous RID-write
----------------------------------------------------------------*/
typedef usbctlx_cmd_completor_t usbctlx_wrid_completor_t;
#define init_wrid_completor  init_cmd_completor

/*----------------------------------------------------------------
* Completor object:
* Interprets the results of a synchronous memory-write
----------------------------------------------------------------*/
typedef usbctlx_cmd_completor_t usbctlx_wmem_completor_t;
#define init_wmem_completor  init_cmd_completor

/*----------------------------------------------------------------
* Completor object:
* Interprets the results of a synchronous memory-read
----------------------------------------------------------------*/
struct usbctlx_rmem_completor
{
        usbctlx_completor_t           head;

        const hfa384x_usb_rmemresp_t  *rmemresp;
        void                          *data;
        unsigned int                          len;
};
typedef struct usbctlx_rmem_completor usbctlx_rmem_completor_t;

static int usbctlx_rmem_completor_fn(usbctlx_completor_t *head)
{
	usbctlx_rmem_completor_t *complete = (usbctlx_rmem_completor_t*)head;

	pr_debug("rmemresp:len=%d\n", complete->rmemresp->frmlen);
	memcpy(complete->data, complete->rmemresp->data, complete->len);
	return 0;
}

static inline usbctlx_completor_t*
init_rmem_completor(usbctlx_rmem_completor_t *completor,
                    hfa384x_usb_rmemresp_t *rmemresp,
                    void *data,
                    unsigned int len)
{
	completor->head.complete = usbctlx_rmem_completor_fn;
	completor->rmemresp = rmemresp;
	completor->data = data;
	completor->len = len;
	return &(completor->head);
}

/*----------------------------------------------------------------
* hfa384x_cb_status
*
* Ctlx_complete handler for async CMD type control exchanges.
* mark the hw struct as such.
*
* Note: If the handling is changed here, it should probably be
*       changed in docmd as well.
*
* Arguments:
*	hw		hw struct
*	ctlx		completed CTLX
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void
hfa384x_cb_status(hfa384x_t *hw, const hfa384x_usbctlx_t *ctlx)
{
	if ( ctlx->usercb != NULL ) {
		hfa384x_cmdresult_t cmdresult;

		if (ctlx->state != CTLX_COMPLETE) {
			memset(&cmdresult, 0, sizeof(cmdresult));
			cmdresult.status = HFA384x_STATUS_RESULT_SET(HFA384x_CMD_ERR);
		} else {
			usbctlx_get_status(&ctlx->inbuf.cmdresp, &cmdresult);
		}

		ctlx->usercb(hw, &cmdresult, ctlx->usercb_data);
	}
}


/*----------------------------------------------------------------
* hfa384x_cb_rrid
*
* CTLX completion handler for async RRID type control exchanges.
*
* Note: If the handling is changed here, it should probably be
*       changed in dorrid as well.
*
* Arguments:
*	hw		hw struct
*	ctlx		completed CTLX
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void
hfa384x_cb_rrid(hfa384x_t *hw, const hfa384x_usbctlx_t *ctlx)
{
	if ( ctlx->usercb != NULL ) {
		hfa384x_rridresult_t rridresult;

		if (ctlx->state != CTLX_COMPLETE) {
			memset(&rridresult, 0, sizeof(rridresult));
			rridresult.rid = hfa384x2host_16(ctlx->outbuf.rridreq.rid);
		} else {
			usbctlx_get_rridresult(&ctlx->inbuf.rridresp, &rridresult);
		}

		ctlx->usercb(hw, &rridresult, ctlx->usercb_data);
	}
}

static inline int
hfa384x_docmd_wait(hfa384x_t *hw, hfa384x_metacmd_t *cmd)
{
	return hfa384x_docmd(hw, DOWAIT, cmd, NULL, NULL, NULL);
}

static inline int
hfa384x_docmd_async(hfa384x_t *hw,
                    hfa384x_metacmd_t *cmd,
                    ctlx_cmdcb_t cmdcb,
                    ctlx_usercb_t usercb,
                    void *usercb_data)
{
	return hfa384x_docmd(hw, DOASYNC, cmd,
	                        cmdcb, usercb, usercb_data);
}

static inline int
hfa384x_dorrid_wait(hfa384x_t *hw, u16 rid, void *riddata, unsigned int riddatalen)
{
	return hfa384x_dorrid(hw, DOWAIT,
	                      rid, riddata, riddatalen,
	                      NULL, NULL, NULL);
}

static inline int
hfa384x_dorrid_async(hfa384x_t *hw,
                     u16 rid, void *riddata, unsigned int riddatalen,
                     ctlx_cmdcb_t cmdcb,
                     ctlx_usercb_t usercb,
                     void *usercb_data)
{
	return hfa384x_dorrid(hw, DOASYNC,
	                      rid, riddata, riddatalen,
	                      cmdcb, usercb, usercb_data);
}

static inline int
hfa384x_dowrid_wait(hfa384x_t *hw, u16 rid, void *riddata, unsigned int riddatalen)
{
	return hfa384x_dowrid(hw, DOWAIT,
	                      rid, riddata, riddatalen,
	                      NULL, NULL, NULL);
}

static inline int
hfa384x_dowrid_async(hfa384x_t *hw,
                     u16 rid, void *riddata, unsigned int riddatalen,
                     ctlx_cmdcb_t cmdcb,
                     ctlx_usercb_t usercb,
                     void *usercb_data)
{
	return hfa384x_dowrid(hw, DOASYNC,
	                      rid, riddata, riddatalen,
	                      cmdcb, usercb, usercb_data);
}

static inline int
hfa384x_dormem_wait(hfa384x_t *hw,
                    u16 page, u16 offset, void *data, unsigned int len)
{
	return hfa384x_dormem(hw, DOWAIT,
	                      page, offset, data, len,
	                      NULL, NULL, NULL);
}

static inline int
hfa384x_dormem_async(hfa384x_t *hw,
                     u16 page, u16 offset, void *data, unsigned int len,
                     ctlx_cmdcb_t cmdcb,
                     ctlx_usercb_t usercb,
                     void *usercb_data)
{
	return hfa384x_dormem(hw, DOASYNC,
	                      page, offset, data, len,
	                      cmdcb, usercb, usercb_data);
}

static inline int
hfa384x_dowmem_wait(
        hfa384x_t *hw,
        u16  page,
        u16  offset,
        void    *data,
        unsigned int    len)
{
	return hfa384x_dowmem(hw, DOWAIT,
                                  page, offset, data, len,
	                          NULL, NULL, NULL);
}

static inline int
hfa384x_dowmem_async(
        hfa384x_t *hw,
        u16  page,
        u16  offset,
        void    *data,
        unsigned int    len,
        ctlx_cmdcb_t cmdcb,
        ctlx_usercb_t usercb,
        void    *usercb_data)
{
	return hfa384x_dowmem(hw, DOASYNC,
                                  page, offset, data, len,
	                          cmdcb, usercb, usercb_data);
}

/*----------------------------------------------------------------
* hfa384x_cmd_initialize
*
* Issues the initialize command and sets the hw->state based
* on the result.
*
* Arguments:
*	hw		device structure
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int
hfa384x_cmd_initialize(hfa384x_t *hw)
{
	int	result = 0;
	int	i;
	hfa384x_metacmd_t cmd;

	cmd.cmd = HFA384x_CMDCODE_INIT;
	cmd.parm0 = 0;
	cmd.parm1 = 0;
	cmd.parm2 = 0;

	result = hfa384x_docmd_wait(hw, &cmd);


	pr_debug("cmdresp.init: "
		"status=0x%04x, resp0=0x%04x, "
		"resp1=0x%04x, resp2=0x%04x\n",
		cmd.result.status,
		cmd.result.resp0,
		cmd.result.resp1,
		cmd.result.resp2);
	if ( result == 0 ) {
		for ( i = 0; i < HFA384x_NUMPORTS_MAX; i++) {
			hw->port_enabled[i] = 0;
		}
	}

        hw->link_status = HFA384x_LINK_NOTCONNECTED;

	return result;
}


/*----------------------------------------------------------------
* hfa384x_cmd_disable
*
* Issues the disable command to stop communications on one of
* the MACs 'ports'.
*
* Arguments:
*	hw		device structure
*	macport		MAC port number (host order)
*
* Returns:
*	0		success
*	>0		f/w reported failure - f/w status code
*	<0		driver reported error (timeout|bad arg)
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_cmd_disable(hfa384x_t *hw, u16 macport)
{
	int	result = 0;
	hfa384x_metacmd_t cmd;

	cmd.cmd = HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_DISABLE) |
		  HFA384x_CMD_MACPORT_SET(macport);
	cmd.parm0 = 0;
	cmd.parm1 = 0;
	cmd.parm2 = 0;

	result = hfa384x_docmd_wait(hw, &cmd);

	return result;
}


/*----------------------------------------------------------------
* hfa384x_cmd_enable
*
* Issues the enable command to enable communications on one of
* the MACs 'ports'.
*
* Arguments:
*	hw		device structure
*	macport		MAC port number
*
* Returns:
*	0		success
*	>0		f/w reported failure - f/w status code
*	<0		driver reported error (timeout|bad arg)
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_cmd_enable(hfa384x_t *hw, u16 macport)
{
	int	result = 0;
	hfa384x_metacmd_t cmd;

	cmd.cmd = HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_ENABLE) |
		  HFA384x_CMD_MACPORT_SET(macport);
	cmd.parm0 = 0;
	cmd.parm1 = 0;
	cmd.parm2 = 0;

	result = hfa384x_docmd_wait(hw, &cmd);

	return result;
}

/*----------------------------------------------------------------
* hfa384x_cmd_monitor
*
* Enables the 'monitor mode' of the MAC.  Here's the description of
* monitor mode that I've received thus far:
*
*  "The "monitor mode" of operation is that the MAC passes all
*  frames for which the PLCP checks are correct. All received
*  MPDUs are passed to the host with MAC Port = 7, with a
*  receive status of good, FCS error, or undecryptable. Passing
*  certain MPDUs is a violation of the 802.11 standard, but useful
*  for a debugging tool."  Normal communication is not possible
*  while monitor mode is enabled.
*
* Arguments:
*	hw		device structure
*	enable		a code (0x0b|0x0f) that enables/disables
*			monitor mode. (host order)
*
* Returns:
*	0		success
*	>0		f/w reported failure - f/w status code
*	<0		driver reported error (timeout|bad arg)
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_cmd_monitor(hfa384x_t *hw, u16 enable)
{
	int	result = 0;
	hfa384x_metacmd_t cmd;

	cmd.cmd = HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_MONITOR) |
		HFA384x_CMD_AINFO_SET(enable);
	cmd.parm0 = 0;
	cmd.parm1 = 0;
	cmd.parm2 = 0;

	result = hfa384x_docmd_wait(hw, &cmd);

	return result;
}


/*----------------------------------------------------------------
* hfa384x_cmd_download
*
* Sets the controls for the MAC controller code/data download
* process.  The arguments set the mode and address associated
* with a download.  Note that the aux registers should be enabled
* prior to setting one of the download enable modes.
*
* Arguments:
*	hw		device structure
*	mode		0 - Disable programming and begin code exec
*			1 - Enable volatile mem programming
*			2 - Enable non-volatile mem programming
*			3 - Program non-volatile section from NV download
*			    buffer.
*			(host order)
*	lowaddr
*	highaddr	For mode 1, sets the high & low order bits of
*			the "destination address".  This address will be
*			the execution start address when download is
*			subsequently disabled.
*			For mode 2, sets the high & low order bits of
*			the destination in NV ram.
*			For modes 0 & 3, should be zero. (host order)
*			NOTE: these are CMD format.
*	codelen		Length of the data to write in mode 2,
*			zero otherwise. (host order)
*
* Returns:
*	0		success
*	>0		f/w reported failure - f/w status code
*	<0		driver reported error (timeout|bad arg)
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_cmd_download(hfa384x_t *hw, u16 mode, u16 lowaddr,
				u16 highaddr, u16 codelen)
{
	int	result = 0;
	hfa384x_metacmd_t cmd;

	printk(KERN_DEBUG
		"mode=%d, lowaddr=0x%04x, highaddr=0x%04x, codelen=%d\n",
		mode, lowaddr, highaddr, codelen);

	cmd.cmd = (HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_DOWNLD) |
		   HFA384x_CMD_PROGMODE_SET(mode));

	cmd.parm0 = lowaddr;
	cmd.parm1 = highaddr;
	cmd.parm2 = codelen;

	result = hfa384x_docmd_wait(hw, &cmd);

	return result;
}


/*----------------------------------------------------------------
* hfa384x_copy_from_aux
*
* Copies a collection of bytes from the controller memory.  The
* Auxiliary port MUST be enabled prior to calling this function.
* We _might_ be in a download state.
*
* Arguments:
*	hw		device structure
*	cardaddr	address in hfa384x data space to read
*	auxctl		address space select
*	buf		ptr to destination host buffer
*	len		length of data to transfer (in bytes)
*
* Returns:
*	nothing
*
* Side effects:
*	buf contains the data copied
*
* Call context:
*	process
*	interrupt
----------------------------------------------------------------*/
void
hfa384x_copy_from_aux(
	hfa384x_t *hw, u32 cardaddr, u32 auxctl, void *buf, unsigned int len)
{
	printk(KERN_ERR "not used in USB.\n");
}


/*----------------------------------------------------------------
* hfa384x_copy_to_aux
*
* Copies a collection of bytes to the controller memory.  The
* Auxiliary port MUST be enabled prior to calling this function.
* We _might_ be in a download state.
*
* Arguments:
*	hw		device structure
*	cardaddr	address in hfa384x data space to read
*	auxctl		address space select
*	buf		ptr to destination host buffer
*	len		length of data to transfer (in bytes)
*
* Returns:
*	nothing
*
* Side effects:
*	Controller memory now contains a copy of buf
*
* Call context:
*	process
*	interrupt
----------------------------------------------------------------*/
void
hfa384x_copy_to_aux(
	hfa384x_t *hw, u32 cardaddr, u32 auxctl, void *buf, unsigned int len)
{
	printk(KERN_ERR "not used in USB.\n");
}


/*----------------------------------------------------------------
* hfa384x_corereset
*
* Perform a reset of the hfa38xx MAC core.  We assume that the hw
* structure is in its "created" state.  That is, it is initialized
* with proper values.  Note that if a reset is done after the
* device has been active for awhile, the caller might have to clean
* up some leftover cruft in the hw structure.
*
* Arguments:
*	hw		device structure
*	holdtime	how long (in ms) to hold the reset
*	settletime	how long (in ms) to wait after releasing
*			the reset
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_corereset(hfa384x_t *hw, int holdtime, int settletime, int genesis)
{
	int 			result = 0;

	result=usb_reset_device(hw->usb);
	if(result<0) {
		printk(KERN_ERR "usb_reset_device() failed, result=%d.\n",result);
	}

	return result;
}


/*----------------------------------------------------------------
* hfa384x_usbctlx_complete_sync
*
* Waits for a synchronous CTLX object to complete,
* and then handles the response.
*
* Arguments:
*	hw		device structure
*	ctlx	 	CTLX ptr
*	completor	functor object to decide what to
*			do with the CTLX's result.
*
* Returns:
*	0		Success
*	-ERESTARTSYS	Interrupted by a signal
*	-EIO		CTLX failed
*	-ENODEV		Adapter was unplugged
*	???		Result from completor
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
static int hfa384x_usbctlx_complete_sync(hfa384x_t *hw,
					 hfa384x_usbctlx_t *ctlx,
					 usbctlx_completor_t *completor)
{
	unsigned long flags;
	int result;

	result = wait_for_completion_interruptible(&ctlx->done);

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	/*
	 * We can only handle the CTLX if the USB disconnect
	 * function has not run yet ...
	 */
	cleanup:
	if ( hw->wlandev->hwremoved )
	{
		spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
		result = -ENODEV;
	}
	else if ( result != 0 )
	{
		int runqueue = 0;

		/*
		 * We were probably interrupted, so delete
		 * this CTLX asynchronously, kill the timers
		 * and the URB, and then start the next
		 * pending CTLX.
		 *
		 * NOTE: We can only delete the timers and
		 *       the URB if this CTLX is active.
		 */
		if (ctlx == get_active_ctlx(hw))
		{
			spin_unlock_irqrestore(&hw->ctlxq.lock, flags);

			del_singleshot_timer_sync(&hw->reqtimer);
			del_singleshot_timer_sync(&hw->resptimer);
			hw->req_timer_done = 1;
			hw->resp_timer_done = 1;
			usb_kill_urb(&hw->ctlx_urb);

			spin_lock_irqsave(&hw->ctlxq.lock, flags);

			runqueue = 1;

			/*
			 * This scenario is so unlikely that I'm
			 * happy with a grubby "goto" solution ...
			 */
			if ( hw->wlandev->hwremoved )
				goto cleanup;
		}

		/*
		 * The completion task will send this CTLX
		 * to the reaper the next time it runs. We
		 * are no longer in a hurry.
		 */
		ctlx->reapable = 1;
		ctlx->state = CTLX_REQ_FAILED;
		list_move_tail(&ctlx->list, &hw->ctlxq.completing);

		spin_unlock_irqrestore(&hw->ctlxq.lock, flags);

		if (runqueue)
			hfa384x_usbctlxq_run(hw);
	} else {
		if (ctlx->state == CTLX_COMPLETE) {
			result = completor->complete(completor);
		} else {
			printk(KERN_WARNING "CTLX[%d] error: state(%s)\n",
			                 hfa384x2host_16(ctlx->outbuf.type),
			                 ctlxstr(ctlx->state));
			result = -EIO;
		}

		list_del(&ctlx->list);
		spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
		kfree(ctlx);
	}

	return result;
}

/*----------------------------------------------------------------
* hfa384x_docmd
*
* Constructs a command CTLX and submits it.
*
* NOTE: Any changes to the 'post-submit' code in this function
*       need to be carried over to hfa384x_cbcmd() since the handling
*       is virtually identical.
*
* Arguments:
*	hw		device structure
*	mode		DOWAIT or DOASYNC
*       cmd             cmd structure.  Includes all arguments and result
*                       data points.  All in host order. in host order
*	cmdcb		command-specific callback
*	usercb		user callback for async calls, NULL for DOWAIT calls
*	usercb_data	user supplied data pointer for async calls, NULL
*			for DOASYNC calls
*
* Returns:
*	0		success
*	-EIO		CTLX failure
*	-ERESTARTSYS	Awakened on signal
*	>0		command indicated error, Status and Resp0-2 are
*			in hw structure.
*
* Side effects:
*
*
* Call context:
*	process
----------------------------------------------------------------*/
static int
hfa384x_docmd(
	hfa384x_t *hw,
	CMD_MODE mode,
	hfa384x_metacmd_t *cmd,
	ctlx_cmdcb_t	cmdcb,
	ctlx_usercb_t	usercb,
	void	*usercb_data)
{
	int			result;
	hfa384x_usbctlx_t	*ctlx;

	ctlx = usbctlx_alloc();
	if ( ctlx == NULL ) {
		result = -ENOMEM;
		goto done;
	}

	/* Initialize the command */
	ctlx->outbuf.cmdreq.type = 	host2hfa384x_16(HFA384x_USB_CMDREQ);
	ctlx->outbuf.cmdreq.cmd =	host2hfa384x_16(cmd->cmd);
	ctlx->outbuf.cmdreq.parm0 =	host2hfa384x_16(cmd->parm0);
	ctlx->outbuf.cmdreq.parm1 =	host2hfa384x_16(cmd->parm1);
	ctlx->outbuf.cmdreq.parm2 =	host2hfa384x_16(cmd->parm2);

	ctlx->outbufsize = sizeof(ctlx->outbuf.cmdreq);

	pr_debug("cmdreq: cmd=0x%04x "
		"parm0=0x%04x parm1=0x%04x parm2=0x%04x\n",
		cmd->cmd,
		cmd->parm0,
		cmd->parm1,
		cmd->parm2);

	ctlx->reapable = mode;
	ctlx->cmdcb = cmdcb;
	ctlx->usercb = usercb;
	ctlx->usercb_data = usercb_data;

	result = hfa384x_usbctlx_submit(hw, ctlx);
	if (result != 0) {
		kfree(ctlx);
	} else if (mode == DOWAIT) {
		usbctlx_cmd_completor_t completor;

		result = hfa384x_usbctlx_complete_sync(
		             hw, ctlx, init_cmd_completor(&completor,
		                                          &ctlx->inbuf.cmdresp,
		                                          &cmd->result) );
	}

done:
	return result;
}


/*----------------------------------------------------------------
* hfa384x_dorrid
*
* Constructs a read rid CTLX and issues it.
*
* NOTE: Any changes to the 'post-submit' code in this function
*       need to be carried over to hfa384x_cbrrid() since the handling
*       is virtually identical.
*
* Arguments:
*	hw		device structure
*	mode		DOWAIT or DOASYNC
*	rid		Read RID number (host order)
*	riddata		Caller supplied buffer that MAC formatted RID.data
*			record will be written to for DOWAIT calls. Should
*			be NULL for DOASYNC calls.
*	riddatalen	Buffer length for DOWAIT calls. Zero for DOASYNC calls.
*	cmdcb		command callback for async calls, NULL for DOWAIT calls
*	usercb		user callback for async calls, NULL for DOWAIT calls
*	usercb_data	user supplied data pointer for async calls, NULL
*			for DOWAIT calls
*
* Returns:
*	0		success
*	-EIO		CTLX failure
*	-ERESTARTSYS	Awakened on signal
*	-ENODATA	riddatalen != macdatalen
*	>0		command indicated error, Status and Resp0-2 are
*			in hw structure.
*
* Side effects:
*
* Call context:
*	interrupt (DOASYNC)
*	process (DOWAIT or DOASYNC)
----------------------------------------------------------------*/
static int
hfa384x_dorrid(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	rid,
	void	*riddata,
	unsigned int	riddatalen,
        ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data)
{
	int			result;
	hfa384x_usbctlx_t	*ctlx;

	ctlx = usbctlx_alloc();
	if ( ctlx == NULL ) {
		result = -ENOMEM;
		goto done;
	}

	/* Initialize the command */
	ctlx->outbuf.rridreq.type =   host2hfa384x_16(HFA384x_USB_RRIDREQ);
	ctlx->outbuf.rridreq.frmlen =
		host2hfa384x_16(sizeof(ctlx->outbuf.rridreq.rid));
	ctlx->outbuf.rridreq.rid =    host2hfa384x_16(rid);

	ctlx->outbufsize = sizeof(ctlx->outbuf.rridreq);

	ctlx->reapable = mode;
	ctlx->cmdcb = cmdcb;
	ctlx->usercb = usercb;
	ctlx->usercb_data = usercb_data;

	/* Submit the CTLX */
	result = hfa384x_usbctlx_submit(hw, ctlx);
	if (result != 0) {
		kfree(ctlx);
	} else if (mode == DOWAIT) {
		usbctlx_rrid_completor_t completor;

		result = hfa384x_usbctlx_complete_sync(
		           hw, ctlx, init_rrid_completor(&completor,
		                                         &ctlx->inbuf.rridresp,
		                                         riddata,
		                                         riddatalen) );
	}

done:
	return result;
}


/*----------------------------------------------------------------
* hfa384x_dowrid
*
* Constructs a write rid CTLX and issues it.
*
* NOTE: Any changes to the 'post-submit' code in this function
*       need to be carried over to hfa384x_cbwrid() since the handling
*       is virtually identical.
*
* Arguments:
*	hw		device structure
*	CMD_MODE	DOWAIT or DOASYNC
*	rid		RID code
*	riddata		Data portion of RID formatted for MAC
*	riddatalen	Length of the data portion in bytes
*       cmdcb           command callback for async calls, NULL for DOWAIT calls
*	usercb		user callback for async calls, NULL for DOWAIT calls
*	usercb_data	user supplied data pointer for async calls
*
* Returns:
*	0		success
*	-ETIMEDOUT	timed out waiting for register ready or
*			command completion
*	>0		command indicated error, Status and Resp0-2 are
*			in hw structure.
*
* Side effects:
*
* Call context:
*	interrupt (DOASYNC)
*	process (DOWAIT or DOASYNC)
----------------------------------------------------------------*/
static int
hfa384x_dowrid(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	rid,
	void	*riddata,
	unsigned int	riddatalen,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data)
{
	int			result;
	hfa384x_usbctlx_t	*ctlx;

	ctlx = usbctlx_alloc();
	if ( ctlx == NULL ) {
		result = -ENOMEM;
		goto done;
	}

	/* Initialize the command */
	ctlx->outbuf.wridreq.type =   host2hfa384x_16(HFA384x_USB_WRIDREQ);
	ctlx->outbuf.wridreq.frmlen = host2hfa384x_16(
					(sizeof(ctlx->outbuf.wridreq.rid) +
					riddatalen + 1) / 2);
	ctlx->outbuf.wridreq.rid =    host2hfa384x_16(rid);
	memcpy(ctlx->outbuf.wridreq.data, riddata, riddatalen);

	ctlx->outbufsize = sizeof(ctlx->outbuf.wridreq.type) +
	                   sizeof(ctlx->outbuf.wridreq.frmlen) +
	                   sizeof(ctlx->outbuf.wridreq.rid) +
	                   riddatalen;

	ctlx->reapable = mode;
	ctlx->cmdcb = cmdcb;
	ctlx->usercb = usercb;
	ctlx->usercb_data = usercb_data;

	/* Submit the CTLX */
	result = hfa384x_usbctlx_submit(hw, ctlx);
	if (result != 0) {
		kfree(ctlx);
	} else if (mode == DOWAIT) {
		usbctlx_wrid_completor_t completor;
		hfa384x_cmdresult_t wridresult;

		result = hfa384x_usbctlx_complete_sync(
		               hw,
		               ctlx,
		               init_wrid_completor(&completor,
		                                   &ctlx->inbuf.wridresp,
		                                   &wridresult) );
	}

done:
	return result;
}

/*----------------------------------------------------------------
* hfa384x_dormem
*
* Constructs a readmem CTLX and issues it.
*
* NOTE: Any changes to the 'post-submit' code in this function
*       need to be carried over to hfa384x_cbrmem() since the handling
*       is virtually identical.
*
* Arguments:
*	hw		device structure
*	mode		DOWAIT or DOASYNC
*	page		MAC address space page (CMD format)
*	offset		MAC address space offset
*	data		Ptr to data buffer to receive read
*	len		Length of the data to read (max == 2048)
*	cmdcb		command callback for async calls, NULL for DOWAIT calls
*	usercb		user callback for async calls, NULL for DOWAIT calls
*	usercb_data	user supplied data pointer for async calls
*
* Returns:
*	0		success
*	-ETIMEDOUT	timed out waiting for register ready or
*			command completion
*	>0		command indicated error, Status and Resp0-2 are
*			in hw structure.
*
* Side effects:
*
* Call context:
*	interrupt (DOASYNC)
*	process (DOWAIT or DOASYNC)
----------------------------------------------------------------*/
static int
hfa384x_dormem(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	page,
	u16	offset,
	void	*data,
	unsigned int	len,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data)
{
	int			result;
	hfa384x_usbctlx_t	*ctlx;

	ctlx = usbctlx_alloc();
	if ( ctlx == NULL ) {
		result = -ENOMEM;
		goto done;
	}

	/* Initialize the command */
	ctlx->outbuf.rmemreq.type =    host2hfa384x_16(HFA384x_USB_RMEMREQ);
	ctlx->outbuf.rmemreq.frmlen =  host2hfa384x_16(
					sizeof(ctlx->outbuf.rmemreq.offset) +
					sizeof(ctlx->outbuf.rmemreq.page) +
					len);
	ctlx->outbuf.rmemreq.offset =	host2hfa384x_16(offset);
	ctlx->outbuf.rmemreq.page =	host2hfa384x_16(page);

	ctlx->outbufsize = sizeof(ctlx->outbuf.rmemreq);

	pr_debug(
		"type=0x%04x frmlen=%d offset=0x%04x page=0x%04x\n",
		ctlx->outbuf.rmemreq.type,
		ctlx->outbuf.rmemreq.frmlen,
		ctlx->outbuf.rmemreq.offset,
		ctlx->outbuf.rmemreq.page);

	pr_debug("pktsize=%zd\n",
		ROUNDUP64(sizeof(ctlx->outbuf.rmemreq)));

	ctlx->reapable = mode;
	ctlx->cmdcb = cmdcb;
	ctlx->usercb = usercb;
	ctlx->usercb_data = usercb_data;

	result = hfa384x_usbctlx_submit(hw, ctlx);
	if (result != 0) {
		kfree(ctlx);
	} else if ( mode == DOWAIT ) {
                usbctlx_rmem_completor_t completor;

                result = hfa384x_usbctlx_complete_sync(
                           hw, ctlx, init_rmem_completor(&completor,
                                                         &ctlx->inbuf.rmemresp,
                                                         data,
                                                         len) );
	}

done:
	return result;
}


/*----------------------------------------------------------------
* hfa384x_dowmem
*
* Constructs a writemem CTLX and issues it.
*
* NOTE: Any changes to the 'post-submit' code in this function
*       need to be carried over to hfa384x_cbwmem() since the handling
*       is virtually identical.
*
* Arguments:
*	hw		device structure
*	mode		DOWAIT or DOASYNC
*	page		MAC address space page (CMD format)
*	offset		MAC address space offset
*	data		Ptr to data buffer containing write data
*	len		Length of the data to read (max == 2048)
*	cmdcb		command callback for async calls, NULL for DOWAIT calls
*	usercb		user callback for async calls, NULL for DOWAIT calls
*	usercb_data	user supplied data pointer for async calls.
*
* Returns:
*	0		success
*	-ETIMEDOUT	timed out waiting for register ready or
*			command completion
*	>0		command indicated error, Status and Resp0-2 are
*			in hw structure.
*
* Side effects:
*
* Call context:
*	interrupt (DOWAIT)
*	process (DOWAIT or DOASYNC)
----------------------------------------------------------------*/
static int
hfa384x_dowmem(
	hfa384x_t *hw,
	CMD_MODE mode,
	u16	page,
	u16	offset,
	void	*data,
	unsigned int	len,
	ctlx_cmdcb_t cmdcb,
	ctlx_usercb_t usercb,
	void	*usercb_data)
{
	int			result;
	hfa384x_usbctlx_t	*ctlx;

	pr_debug("page=0x%04x offset=0x%04x len=%d\n",
		page,offset,len);

	ctlx = usbctlx_alloc();
	if ( ctlx == NULL ) {
		result = -ENOMEM;
		goto done;
	}

	/* Initialize the command */
	ctlx->outbuf.wmemreq.type =   host2hfa384x_16(HFA384x_USB_WMEMREQ);
	ctlx->outbuf.wmemreq.frmlen = host2hfa384x_16(
					sizeof(ctlx->outbuf.wmemreq.offset) +
					sizeof(ctlx->outbuf.wmemreq.page) +
					len);
	ctlx->outbuf.wmemreq.offset = host2hfa384x_16(offset);
	ctlx->outbuf.wmemreq.page =   host2hfa384x_16(page);
	memcpy(ctlx->outbuf.wmemreq.data, data, len);

	ctlx->outbufsize = sizeof(ctlx->outbuf.wmemreq.type) +
	                   sizeof(ctlx->outbuf.wmemreq.frmlen) +
	                   sizeof(ctlx->outbuf.wmemreq.offset) +
	                   sizeof(ctlx->outbuf.wmemreq.page) +
	                   len;

	ctlx->reapable = mode;
	ctlx->cmdcb = cmdcb;
	ctlx->usercb = usercb;
	ctlx->usercb_data = usercb_data;

	result = hfa384x_usbctlx_submit(hw, ctlx);
	if (result != 0) {
		kfree(ctlx);
	} else if ( mode == DOWAIT ) {
                usbctlx_wmem_completor_t completor;
                hfa384x_cmdresult_t wmemresult;

                result = hfa384x_usbctlx_complete_sync(
                               hw,
                               ctlx,
                               init_wmem_completor(&completor,
                                                   &ctlx->inbuf.wmemresp,
                                                   &wmemresult) );
	}

done:
	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_commtallies
*
* Send a commtallies inquiry to the MAC.  Note that this is an async
* call that will result in an info frame arriving sometime later.
*
* Arguments:
*	hw		device structure
*
* Returns:
*	zero		success.
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_commtallies( hfa384x_t *hw )
{
	hfa384x_metacmd_t cmd;

	cmd.cmd = HFA384x_CMDCODE_INQ;
	cmd.parm0 = HFA384x_IT_COMMTALLIES;
	cmd.parm1 = 0;
	cmd.parm2 = 0;

	hfa384x_docmd_async(hw, &cmd, NULL, NULL, NULL);

	return 0;
}


/*----------------------------------------------------------------
* hfa384x_drvr_disable
*
* Issues the disable command to stop communications on one of
* the MACs 'ports'.  Only macport 0 is valid  for stations.
* APs may also disable macports 1-6.  Only ports that have been
* previously enabled may be disabled.
*
* Arguments:
*	hw		device structure
*	macport		MAC port number (host order)
*
* Returns:
*	0		success
*	>0		f/w reported failure - f/w status code
*	<0		driver reported error (timeout|bad arg)
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_disable(hfa384x_t *hw, u16 macport)
{
	int	result = 0;

	if ((!hw->isap && macport != 0) ||
	    (hw->isap && !(macport <= HFA384x_PORTID_MAX)) ||
	    !(hw->port_enabled[macport]) ){
		result = -EINVAL;
	} else {
		result = hfa384x_cmd_disable(hw, macport);
		if ( result == 0 ) {
			hw->port_enabled[macport] = 0;
		}
	}
	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_enable
*
* Issues the enable command to enable communications on one of
* the MACs 'ports'.  Only macport 0 is valid  for stations.
* APs may also enable macports 1-6.  Only ports that are currently
* disabled may be enabled.
*
* Arguments:
*	hw		device structure
*	macport		MAC port number
*
* Returns:
*	0		success
*	>0		f/w reported failure - f/w status code
*	<0		driver reported error (timeout|bad arg)
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_enable(hfa384x_t *hw, u16 macport)
{
	int	result = 0;

	if ((!hw->isap && macport != 0) ||
	    (hw->isap && !(macport <= HFA384x_PORTID_MAX)) ||
	    (hw->port_enabled[macport]) ){
		result = -EINVAL;
	} else {
		result = hfa384x_cmd_enable(hw, macport);
		if ( result == 0 ) {
			hw->port_enabled[macport] = 1;
		}
	}
	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_flashdl_enable
*
* Begins the flash download state.  Checks to see that we're not
* already in a download state and that a port isn't enabled.
* Sets the download state and retrieves the flash download
* buffer location, buffer size, and timeout length.
*
* Arguments:
*	hw		device structure
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_flashdl_enable(hfa384x_t *hw)
{
	int		result = 0;
	int		i;

	/* Check that a port isn't active */
	for ( i = 0; i < HFA384x_PORTID_MAX; i++) {
		if ( hw->port_enabled[i] ) {
			pr_debug("called when port enabled.\n");
			return -EINVAL;
		}
	}

	/* Check that we're not already in a download state */
	if ( hw->dlstate != HFA384x_DLSTATE_DISABLED ) {
		return -EINVAL;
	}

	/* Retrieve the buffer loc&size and timeout */
	if ( (result = hfa384x_drvr_getconfig(hw, HFA384x_RID_DOWNLOADBUFFER,
				&(hw->bufinfo), sizeof(hw->bufinfo))) ) {
		return result;
	}
	hw->bufinfo.page = hfa384x2host_16(hw->bufinfo.page);
	hw->bufinfo.offset = hfa384x2host_16(hw->bufinfo.offset);
	hw->bufinfo.len = hfa384x2host_16(hw->bufinfo.len);
	if ( (result = hfa384x_drvr_getconfig16(hw, HFA384x_RID_MAXLOADTIME,
				&(hw->dltimeout))) ) {
		return result;
	}
	hw->dltimeout = hfa384x2host_16(hw->dltimeout);

	pr_debug("flashdl_enable\n");

	hw->dlstate = HFA384x_DLSTATE_FLASHENABLED;

	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_flashdl_disable
*
* Ends the flash download state.  Note that this will cause the MAC
* firmware to restart.
*
* Arguments:
*	hw		device structure
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_flashdl_disable(hfa384x_t *hw)
{
	/* Check that we're already in the download state */
	if ( hw->dlstate != HFA384x_DLSTATE_FLASHENABLED ) {
		return -EINVAL;
	}

	pr_debug("flashdl_enable\n");

	/* There isn't much we can do at this point, so I don't */
	/*  bother  w/ the return value */
	hfa384x_cmd_download(hw, HFA384x_PROGMODE_DISABLE, 0, 0 , 0);
	hw->dlstate = HFA384x_DLSTATE_DISABLED;

	return 0;
}


/*----------------------------------------------------------------
* hfa384x_drvr_flashdl_write
*
* Performs a FLASH download of a chunk of data. First checks to see
* that we're in the FLASH download state, then sets the download
* mode, uses the aux functions to 1) copy the data to the flash
* buffer, 2) sets the download 'write flash' mode, 3) readback and
* compare.  Lather rinse, repeat as many times an necessary to get
* all the given data into flash.
* When all data has been written using this function (possibly
* repeatedly), call drvr_flashdl_disable() to end the download state
* and restart the MAC.
*
* Arguments:
*	hw		device structure
*	daddr		Card address to write to. (host order)
*	buf		Ptr to data to write.
*	len		Length of data (host order).
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int
hfa384x_drvr_flashdl_write(
	hfa384x_t	*hw,
	u32		daddr,
	void		*buf,
	u32		len)
{
	int		result = 0;
	u32		dlbufaddr;
	int		nburns;
	u32		burnlen;
	u32		burndaddr;
	u16		burnlo;
	u16		burnhi;
	int		nwrites;
	u8		*writebuf;
	u16		writepage;
	u16		writeoffset;
	u32		writelen;
	int		i;
	int		j;

	pr_debug("daddr=0x%08x len=%d\n", daddr, len);

	/* Check that we're in the flash download state */
	if ( hw->dlstate != HFA384x_DLSTATE_FLASHENABLED ) {
		return -EINVAL;
	}

	printk(KERN_INFO "Download %d bytes to flash @0x%06x\n", len, daddr);

	/* Convert to flat address for arithmetic */
	/* NOTE: dlbuffer RID stores the address in AUX format */
	dlbufaddr = HFA384x_ADDR_AUX_MKFLAT(
			hw->bufinfo.page, hw->bufinfo.offset);
	pr_debug(
		"dlbuf.page=0x%04x dlbuf.offset=0x%04x dlbufaddr=0x%08x\n",
		hw->bufinfo.page, hw->bufinfo.offset, dlbufaddr);

#if 0
printk(KERN_WARNING "dlbuf@0x%06lx len=%d to=%d\n", dlbufaddr, hw->bufinfo.len, hw->dltimeout);
#endif
	/* Calculations to determine how many fills of the dlbuffer to do
	 * and how many USB wmemreq's to do for each fill.  At this point
	 * in time, the dlbuffer size and the wmemreq size are the same.
	 * Therefore, nwrites should always be 1.  The extra complexity
	 * here is a hedge against future changes.
	 */

	/* Figure out how many times to do the flash programming */
	nburns = len / hw->bufinfo.len;
	nburns += (len % hw->bufinfo.len) ? 1 : 0;

	/* For each flash program cycle, how many USB wmemreq's are needed? */
	nwrites = hw->bufinfo.len / HFA384x_USB_RWMEM_MAXLEN;
	nwrites += (hw->bufinfo.len % HFA384x_USB_RWMEM_MAXLEN) ? 1 : 0;

	/* For each burn */
	for ( i = 0; i < nburns; i++) {
		/* Get the dest address and len */
		burnlen = (len - (hw->bufinfo.len * i)) > hw->bufinfo.len ?
				hw->bufinfo.len :
				(len - (hw->bufinfo.len * i));
		burndaddr = daddr + (hw->bufinfo.len * i);
		burnlo = HFA384x_ADDR_CMD_MKOFF(burndaddr);
		burnhi = HFA384x_ADDR_CMD_MKPAGE(burndaddr);

		printk(KERN_INFO "Writing %d bytes to flash @0x%06x\n",
			burnlen, burndaddr);

		/* Set the download mode */
		result = hfa384x_cmd_download(hw, HFA384x_PROGMODE_NV,
				burnlo, burnhi, burnlen);
		if ( result ) {
			printk(KERN_ERR "download(NV,lo=%x,hi=%x,len=%x) "
				"cmd failed, result=%d. Aborting d/l\n",
				burnlo, burnhi, burnlen, result);
			goto exit_proc;
		}

		/* copy the data to the flash download buffer */
		for ( j=0; j < nwrites; j++) {
			writebuf = buf +
				(i*hw->bufinfo.len) +
				(j*HFA384x_USB_RWMEM_MAXLEN);

			writepage = HFA384x_ADDR_CMD_MKPAGE(
					dlbufaddr +
					(j*HFA384x_USB_RWMEM_MAXLEN));
			writeoffset = HFA384x_ADDR_CMD_MKOFF(
					dlbufaddr +
					(j*HFA384x_USB_RWMEM_MAXLEN));

			writelen = burnlen-(j*HFA384x_USB_RWMEM_MAXLEN);
			writelen = writelen  > HFA384x_USB_RWMEM_MAXLEN ?
					HFA384x_USB_RWMEM_MAXLEN :
					writelen;

			result = hfa384x_dowmem_wait( hw,
					writepage,
					writeoffset,
					writebuf,
					writelen );
		}

		/* set the download 'write flash' mode */
		result = hfa384x_cmd_download(hw,
				HFA384x_PROGMODE_NVWRITE,
				0,0,0);
		if ( result ) {
			printk(KERN_ERR
				"download(NVWRITE,lo=%x,hi=%x,len=%x) "
				"cmd failed, result=%d. Aborting d/l\n",
				burnlo, burnhi, burnlen, result);
			goto exit_proc;
		}

		/* TODO: We really should do a readback and compare. */
	}

exit_proc:

	/* Leave the firmware in the 'post-prog' mode.  flashdl_disable will */
	/*  actually disable programming mode.  Remember, that will cause the */
	/*  the firmware to effectively reset itself. */

	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_getconfig
*
* Performs the sequence necessary to read a config/info item.
*
* Arguments:
*	hw		device structure
*	rid		config/info record id (host order)
*	buf		host side record buffer.  Upon return it will
*			contain the body portion of the record (minus the
*			RID and len).
*	len		buffer length (in bytes, should match record length)
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*	-ENODATA 	length mismatch between argument and retrieved
*			record.
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_getconfig(hfa384x_t *hw, u16 rid, void *buf, u16 len)
{
	int 			result;

	result = hfa384x_dorrid_wait(hw, rid, buf, len);

	return result;
}

/*----------------------------------------------------------------
 * hfa384x_drvr_getconfig_async
 *
 * Performs the sequence necessary to perform an async read of
 * of a config/info item.
 *
 * Arguments:
 *       hw              device structure
 *       rid             config/info record id (host order)
 *       buf             host side record buffer.  Upon return it will
 *                       contain the body portion of the record (minus the
 *                       RID and len).
 *       len             buffer length (in bytes, should match record length)
 *       cbfn            caller supplied callback, called when the command
 *                       is done (successful or not).
 *       cbfndata        pointer to some caller supplied data that will be
 *                       passed in as an argument to the cbfn.
 *
 * Returns:
 *       nothing         the cbfn gets a status argument identifying if
 *                       any errors occur.
 * Side effects:
 *       Queues an hfa384x_usbcmd_t for subsequent execution.
 *
 * Call context:
 *       Any
 ----------------------------------------------------------------*/
int
hfa384x_drvr_getconfig_async(
         hfa384x_t               *hw,
         u16                  rid,
         ctlx_usercb_t           usercb,
         void                    *usercb_data)
{
         return hfa384x_dorrid_async(hw, rid, NULL, 0,
				     hfa384x_cb_rrid, usercb, usercb_data);
}

/*----------------------------------------------------------------
 * hfa384x_drvr_setconfig_async
 *
 * Performs the sequence necessary to write a config/info item.
 *
 * Arguments:
 *       hw              device structure
 *       rid             config/info record id (in host order)
 *       buf             host side record buffer
 *       len             buffer length (in bytes)
 *       usercb          completion callback
 *       usercb_data     completion callback argument
 *
 * Returns:
 *       0               success
 *       >0              f/w reported error - f/w status code
 *       <0              driver reported error
 *
 * Side effects:
 *
 * Call context:
 *       process
 ----------------------------------------------------------------*/
int
hfa384x_drvr_setconfig_async(
         hfa384x_t       *hw,
         u16          rid,
         void            *buf,
         u16          len,
         ctlx_usercb_t   usercb,
         void            *usercb_data)
{
	return hfa384x_dowrid_async(hw, rid, buf, len,
				    hfa384x_cb_status, usercb, usercb_data);
}

/*----------------------------------------------------------------
* hfa384x_drvr_handover
*
* Sends a handover notification to the MAC.
*
* Arguments:
*	hw		device structure
*	addr		address of station that's left
*
* Returns:
*	zero		success.
*	-ERESTARTSYS	received signal while waiting for semaphore.
*	-EIO		failed to write to bap, or failed in cmd.
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_handover( hfa384x_t *hw, u8 *addr)
{
	printk(KERN_ERR "Not currently supported in USB!\n");
	return -EIO;
}

/*----------------------------------------------------------------
* hfa384x_drvr_ramdl_disable
*
* Ends the ram download state.
*
* Arguments:
*	hw		device structure
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int
hfa384x_drvr_ramdl_disable(hfa384x_t *hw)
{
	/* Check that we're already in the download state */
	if ( hw->dlstate != HFA384x_DLSTATE_RAMENABLED ) {
		return -EINVAL;
	}

	pr_debug("ramdl_disable()\n");

	/* There isn't much we can do at this point, so I don't */
	/*  bother  w/ the return value */
	hfa384x_cmd_download(hw, HFA384x_PROGMODE_DISABLE, 0, 0 , 0);
	hw->dlstate = HFA384x_DLSTATE_DISABLED;

	return 0;
}


/*----------------------------------------------------------------
* hfa384x_drvr_ramdl_enable
*
* Begins the ram download state.  Checks to see that we're not
* already in a download state and that a port isn't enabled.
* Sets the download state and calls cmd_download with the
* ENABLE_VOLATILE subcommand and the exeaddr argument.
*
* Arguments:
*	hw		device structure
*	exeaddr		the card execution address that will be
*                       jumped to when ramdl_disable() is called
*			(host order).
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int
hfa384x_drvr_ramdl_enable(hfa384x_t *hw, u32 exeaddr)
{
	int		result = 0;
	u16		lowaddr;
	u16		hiaddr;
	int		i;

	/* Check that a port isn't active */
	for ( i = 0; i < HFA384x_PORTID_MAX; i++) {
		if ( hw->port_enabled[i] ) {
			printk(KERN_ERR
				"Can't download with a macport enabled.\n");
			return -EINVAL;
		}
	}

	/* Check that we're not already in a download state */
	if ( hw->dlstate != HFA384x_DLSTATE_DISABLED ) {
		printk(KERN_ERR
			"Download state not disabled.\n");
		return -EINVAL;
	}

	pr_debug("ramdl_enable, exeaddr=0x%08x\n", exeaddr);

	/* Call the download(1,addr) function */
	lowaddr = HFA384x_ADDR_CMD_MKOFF(exeaddr);
	hiaddr =  HFA384x_ADDR_CMD_MKPAGE(exeaddr);

	result = hfa384x_cmd_download(hw, HFA384x_PROGMODE_RAM,
			lowaddr, hiaddr, 0);

	if ( result == 0) {
		/* Set the download state */
		hw->dlstate = HFA384x_DLSTATE_RAMENABLED;
	} else {
		pr_debug(
			"cmd_download(0x%04x, 0x%04x) failed, result=%d.\n",
			lowaddr,
			hiaddr,
			result);
	}

	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_ramdl_write
*
* Performs a RAM download of a chunk of data. First checks to see
* that we're in the RAM download state, then uses the [read|write]mem USB
* commands to 1) copy the data, 2) readback and compare.  The download
* state is unaffected.  When all data has been written using
* this function, call drvr_ramdl_disable() to end the download state
* and restart the MAC.
*
* Arguments:
*	hw		device structure
*	daddr		Card address to write to. (host order)
*	buf		Ptr to data to write.
*	len		Length of data (host order).
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int
hfa384x_drvr_ramdl_write(hfa384x_t *hw, u32 daddr, void* buf, u32 len)
{
	int		result = 0;
	int		nwrites;
	u8		*data = buf;
	int		i;
	u32		curraddr;
	u16		currpage;
	u16		curroffset;
	u16		currlen;

	/* Check that we're in the ram download state */
	if ( hw->dlstate != HFA384x_DLSTATE_RAMENABLED ) {
		return -EINVAL;
	}

	printk(KERN_INFO "Writing %d bytes to ram @0x%06x\n", len, daddr);

	/* How many dowmem calls?  */
	nwrites = len / HFA384x_USB_RWMEM_MAXLEN;
	nwrites += len % HFA384x_USB_RWMEM_MAXLEN ? 1 : 0;

	/* Do blocking wmem's */
	for(i=0; i < nwrites; i++) {
		/* make address args */
		curraddr = daddr + (i * HFA384x_USB_RWMEM_MAXLEN);
		currpage = HFA384x_ADDR_CMD_MKPAGE(curraddr);
		curroffset = HFA384x_ADDR_CMD_MKOFF(curraddr);
		currlen = len - (i * HFA384x_USB_RWMEM_MAXLEN);
		if ( currlen > HFA384x_USB_RWMEM_MAXLEN) {
			currlen = HFA384x_USB_RWMEM_MAXLEN;
		}

	 	/* Do blocking ctlx */
		result = hfa384x_dowmem_wait( hw,
				currpage,
				curroffset,
				data + (i*HFA384x_USB_RWMEM_MAXLEN),
				currlen );

		if (result) break;

		/* TODO: We really should have a readback. */
	}

	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_readpda
*
* Performs the sequence to read the PDA space.  Note there is no
* drvr_writepda() function.  Writing a PDA is
* generally implemented by a calling component via calls to
* cmd_download and writing to the flash download buffer via the
* aux regs.
*
* Arguments:
*	hw		device structure
*	buf		buffer to store PDA in
*	len		buffer length
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*	-ETIMEOUT	timout waiting for the cmd regs to become
*			available, or waiting for the control reg
*			to indicate the Aux port is enabled.
*	-ENODATA	the buffer does NOT contain a valid PDA.
*			Either the card PDA is bad, or the auxdata
*			reads are giving us garbage.

*
* Side effects:
*
* Call context:
*	process or non-card interrupt.
----------------------------------------------------------------*/
int hfa384x_drvr_readpda(hfa384x_t *hw, void *buf, unsigned int len)
{
	int		result = 0;
	u16		*pda = buf;
	int		pdaok = 0;
	int		morepdrs = 1;
	int		currpdr = 0;	/* word offset of the current pdr */
	size_t		i;
	u16		pdrlen;		/* pdr length in bytes, host order */
	u16		pdrcode;	/* pdr code, host order */
	u16		currpage;
	u16		curroffset;
	struct pdaloc {
		u32	cardaddr;
		u16	auxctl;
	} pdaloc[] =
	{
		{ HFA3842_PDA_BASE,		0},
		{ HFA3841_PDA_BASE,		0},
		{ HFA3841_PDA_BOGUS_BASE,	0}
	};

	/* Read the pda from each known address.  */
	for ( i = 0; i < ARRAY_SIZE(pdaloc); i++) {
		/* Make address */
		currpage = HFA384x_ADDR_CMD_MKPAGE(pdaloc[i].cardaddr);
		curroffset = HFA384x_ADDR_CMD_MKOFF(pdaloc[i].cardaddr);

		result = hfa384x_dormem_wait(hw,
			currpage,
			curroffset,
			buf,
			len);		/* units of bytes */

		if (result) {
			printk(KERN_WARNING
					  "Read from index %zd failed, continuing\n",
				i );
			continue;
		}

		/* Test for garbage */
		pdaok = 1;	/* initially assume good */
		morepdrs = 1;
		while ( pdaok && morepdrs ) {
			pdrlen = hfa384x2host_16(pda[currpdr]) * 2;
			pdrcode = hfa384x2host_16(pda[currpdr+1]);
			/* Test the record length */
			if ( pdrlen > HFA384x_PDR_LEN_MAX || pdrlen == 0) {
				printk(KERN_ERR "pdrlen invalid=%d\n",
					pdrlen);
				pdaok = 0;
				break;
			}
			/* Test the code */
			if ( !hfa384x_isgood_pdrcode(pdrcode) ) {
				printk(KERN_ERR "pdrcode invalid=%d\n",
					pdrcode);
				pdaok = 0;
				break;
			}
			/* Test for completion */
			if ( pdrcode == HFA384x_PDR_END_OF_PDA) {
				morepdrs = 0;
			}

			/* Move to the next pdr (if necessary) */
			if ( morepdrs ) {
				/* note the access to pda[], need words here */
				currpdr += hfa384x2host_16(pda[currpdr]) + 1;
			}
		}
		if ( pdaok ) {
			printk(KERN_INFO
				"PDA Read from 0x%08x in %s space.\n",
				pdaloc[i].cardaddr,
				pdaloc[i].auxctl == 0 ? "EXTDS" :
				pdaloc[i].auxctl == 1 ? "NV" :
				pdaloc[i].auxctl == 2 ? "PHY" :
				pdaloc[i].auxctl == 3 ? "ICSRAM" :
				"<bogus auxctl>");
			break;
		}
	}
	result = pdaok ? 0 : -ENODATA;

	if ( result ) {
		pr_debug("Failure: pda is not okay\n");
	}

	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_setconfig
*
* Performs the sequence necessary to write a config/info item.
*
* Arguments:
*	hw		device structure
*	rid		config/info record id (in host order)
*	buf		host side record buffer
*	len		buffer length (in bytes)
*
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int hfa384x_drvr_setconfig(hfa384x_t *hw, u16 rid, void *buf, u16 len)
{
	return hfa384x_dowrid_wait(hw, rid, buf, len);
}

/*----------------------------------------------------------------
* hfa384x_drvr_start
*
* Issues the MAC initialize command, sets up some data structures,
* and enables the interrupts.  After this function completes, the
* low-level stuff should be ready for any/all commands.
*
* Arguments:
*	hw		device structure
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/

int hfa384x_drvr_start(hfa384x_t *hw)
{
	int		result, result1, result2;
	u16		status;

	might_sleep();

	/* Clear endpoint stalls - but only do this if the endpoint
	 * is showing a stall status. Some prism2 cards seem to behave
	 * badly if a clear_halt is called when the endpoint is already
	 * ok
	 */
	result = usb_get_status(hw->usb, USB_RECIP_ENDPOINT, hw->endp_in, &status);
	if (result < 0) {
		printk(KERN_ERR
			"Cannot get bulk in endpoint status.\n");
		goto done;
	}
	if ((status == 1) && usb_clear_halt(hw->usb, hw->endp_in)) {
		printk(KERN_ERR
			"Failed to reset bulk in endpoint.\n");
	}

	result = usb_get_status(hw->usb, USB_RECIP_ENDPOINT, hw->endp_out, &status);
	if (result < 0) {
		printk(KERN_ERR
			"Cannot get bulk out endpoint status.\n");
		goto done;
	}
	if ((status == 1) && usb_clear_halt(hw->usb, hw->endp_out)) {
		printk(KERN_ERR
			"Failed to reset bulk out endpoint.\n");
	}

	/* Synchronous unlink, in case we're trying to restart the driver */
	usb_kill_urb(&hw->rx_urb);

	/* Post the IN urb */
	result = submit_rx_urb(hw, GFP_KERNEL);
	if (result != 0) {
		printk(KERN_ERR
			"Fatal, failed to submit RX URB, result=%d\n",
			result);
		goto done;
	}

	/* Call initialize twice, with a 1 second sleep in between.
	 * This is a nasty work-around since many prism2 cards seem to
	 * need time to settle after an init from cold. The second
	 * call to initialize in theory is not necessary - but we call
	 * it anyway as a double insurance policy:
	 * 1) If the first init should fail, the second may well succeed
	 *    and the card can still be used
	 * 2) It helps ensures all is well with the card after the first
	 *    init and settle time.
	 */
	result1 = hfa384x_cmd_initialize(hw);
	msleep(1000);
	result = result2 = hfa384x_cmd_initialize(hw);
	if (result1 != 0) {
		if (result2 != 0) {
			printk(KERN_ERR
				"cmd_initialize() failed on two attempts, results %d and %d\n",
				result1, result2);
			usb_kill_urb(&hw->rx_urb);
			goto done;
		} else {
			pr_debug("First cmd_initialize() failed (result %d),\n",
				result1);
			pr_debug("but second attempt succeeded. All should be ok\n");
		}
	} else if (result2 != 0) {
		printk(KERN_WARNING
			"First cmd_initialize() succeeded, but second attempt failed (result=%d)\n",
			result2);
		printk(KERN_WARNING "Most likely the card will be functional\n");
			goto done;
	}

	hw->state = HFA384x_STATE_RUNNING;

done:
	return result;
}


/*----------------------------------------------------------------
* hfa384x_drvr_stop
*
* Shuts down the MAC to the point where it is safe to unload the
* driver.  Any subsystem that may be holding a data or function
* ptr into the driver must be cleared/deinitialized.
*
* Arguments:
*	hw		device structure
* Returns:
*	0		success
*	>0		f/w reported error - f/w status code
*	<0		driver reported error
*
* Side effects:
*
* Call context:
*	process
----------------------------------------------------------------*/
int
hfa384x_drvr_stop(hfa384x_t *hw)
{
	int	result = 0;
	int	i;

	might_sleep();

	/* There's no need for spinlocks here. The USB "disconnect"
	 * function sets this "removed" flag and then calls us.
	 */
	if ( !hw->wlandev->hwremoved ) {
		/* Call initialize to leave the MAC in its 'reset' state */
		hfa384x_cmd_initialize(hw);

		/* Cancel the rxurb */
		usb_kill_urb(&hw->rx_urb);
	}

	hw->link_status = HFA384x_LINK_NOTCONNECTED;
	hw->state = HFA384x_STATE_INIT;

	del_timer_sync(&hw->commsqual_timer);

	/* Clear all the port status */
	for ( i = 0; i < HFA384x_NUMPORTS_MAX; i++) {
		hw->port_enabled[i] = 0;
	}

	return result;
}

/*----------------------------------------------------------------
* hfa384x_drvr_txframe
*
* Takes a frame from prism2sta and queues it for transmission.
*
* Arguments:
*	hw		device structure
*	skb		packet buffer struct.  Contains an 802.11
*			data frame.
*       p80211_hdr      points to the 802.11 header for the packet.
* Returns:
*	0		Success and more buffs available
*	1		Success but no more buffs
*	2		Allocation failure
*	4		Buffer full or queue busy
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
int hfa384x_drvr_txframe(hfa384x_t *hw, struct sk_buff *skb, p80211_hdr_t *p80211_hdr, p80211_metawep_t *p80211_wep)

{
	int		usbpktlen = sizeof(hfa384x_tx_frame_t);
	int		result;
	int		ret;
	char		*ptr;

	if (hw->tx_urb.status == -EINPROGRESS) {
		printk(KERN_WARNING "TX URB already in use\n");
		result = 3;
		goto exit;
	}

	/* Build Tx frame structure */
	/* Set up the control field */
	memset(&hw->txbuff.txfrm.desc, 0, sizeof(hw->txbuff.txfrm.desc));

	/* Setup the usb type field */
	hw->txbuff.type = host2hfa384x_16(HFA384x_USB_TXFRM);

	/* Set up the sw_support field to identify this frame */
	hw->txbuff.txfrm.desc.sw_support = 0x0123;

/* Tx complete and Tx exception disable per dleach.  Might be causing
 * buf depletion
 */
//#define DOEXC  SLP -- doboth breaks horribly under load, doexc less so.
#if defined(DOBOTH)
	hw->txbuff.txfrm.desc.tx_control =
		HFA384x_TX_MACPORT_SET(0) | HFA384x_TX_STRUCTYPE_SET(1) |
		HFA384x_TX_TXEX_SET(1) | HFA384x_TX_TXOK_SET(1);
#elif defined(DOEXC)
	hw->txbuff.txfrm.desc.tx_control =
		HFA384x_TX_MACPORT_SET(0) | HFA384x_TX_STRUCTYPE_SET(1) |
		HFA384x_TX_TXEX_SET(1) | HFA384x_TX_TXOK_SET(0);
#else
	hw->txbuff.txfrm.desc.tx_control =
		HFA384x_TX_MACPORT_SET(0) | HFA384x_TX_STRUCTYPE_SET(1) |
		HFA384x_TX_TXEX_SET(0) | HFA384x_TX_TXOK_SET(0);
#endif
	hw->txbuff.txfrm.desc.tx_control =
		host2hfa384x_16(hw->txbuff.txfrm.desc.tx_control);

	/* copy the header over to the txdesc */
	memcpy(&(hw->txbuff.txfrm.desc.frame_control), p80211_hdr, sizeof(p80211_hdr_t));

	/* if we're using host WEP, increase size by IV+ICV */
	if (p80211_wep->data) {
		hw->txbuff.txfrm.desc.data_len = host2hfa384x_16(skb->len+8);
		usbpktlen+=8;
	} else {
		hw->txbuff.txfrm.desc.data_len = host2hfa384x_16(skb->len);
	}

	usbpktlen += skb->len;

	/* copy over the WEP IV if we are using host WEP */
	ptr = hw->txbuff.txfrm.data;
	if (p80211_wep->data) {
		memcpy(ptr, p80211_wep->iv, sizeof(p80211_wep->iv));
		ptr+= sizeof(p80211_wep->iv);
		memcpy(ptr, p80211_wep->data, skb->len);
	} else {
		memcpy(ptr, skb->data, skb->len);
	}
	/* copy over the packet data */
	ptr+= skb->len;

	/* copy over the WEP ICV if we are using host WEP */
	if (p80211_wep->data) {
		memcpy(ptr, p80211_wep->icv, sizeof(p80211_wep->icv));
	}

	/* Send the USB packet */
	usb_fill_bulk_urb( &(hw->tx_urb), hw->usb,
	               hw->endp_out,
	               &(hw->txbuff), ROUNDUP64(usbpktlen),
	               hfa384x_usbout_callback, hw->wlandev );
	hw->tx_urb.transfer_flags |= USB_QUEUE_BULK;

	result = 1;
	ret = submit_tx_urb(hw, &hw->tx_urb, GFP_ATOMIC);
	if ( ret != 0 ) {
		printk(KERN_ERR
			"submit_tx_urb() failed, error=%d\n", ret);
		result = 3;
	}

 exit:
	return result;
}

void hfa384x_tx_timeout(wlandevice_t *wlandev)
{
	hfa384x_t	*hw = wlandev->priv;
	unsigned long flags;

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	if ( !hw->wlandev->hwremoved &&
	     /* Note the bitwise OR, not the logical OR. */
	     ( !test_and_set_bit(WORK_TX_HALT, &hw->usb_flags) |
	       !test_and_set_bit(WORK_RX_HALT, &hw->usb_flags) ) )
	{
		schedule_work(&hw->usb_work);
	}

	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
}

/*----------------------------------------------------------------
* hfa384x_usbctlx_reaper_task
*
* Tasklet to delete dead CTLX objects
*
* Arguments:
*	data	ptr to a hfa384x_t
*
* Returns:
*
* Call context:
*	Interrupt
----------------------------------------------------------------*/
static void hfa384x_usbctlx_reaper_task(unsigned long data)
{
	hfa384x_t	*hw = (hfa384x_t*)data;
	struct list_head *entry;
	struct list_head *temp;
	unsigned long	flags;

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	/* This list is guaranteed to be empty if someone
	 * has unplugged the adapter.
	 */
	list_for_each_safe(entry, temp, &hw->ctlxq.reapable) {
		hfa384x_usbctlx_t	*ctlx;

		ctlx = list_entry(entry, hfa384x_usbctlx_t, list);
		list_del(&ctlx->list);
		kfree(ctlx);
	}

	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);

}

/*----------------------------------------------------------------
* hfa384x_usbctlx_completion_task
*
* Tasklet to call completion handlers for returned CTLXs
*
* Arguments:
*	data	ptr to hfa384x_t
*
* Returns:
*	Nothing
*
* Call context:
*	Interrupt
----------------------------------------------------------------*/
static void hfa384x_usbctlx_completion_task(unsigned long data)
{
	hfa384x_t *hw = (hfa384x_t*)data;
	struct list_head *entry;
	struct list_head *temp;
	unsigned long flags;

	int reap = 0;

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	/* This list is guaranteed to be empty if someone
	 * has unplugged the adapter ...
	 */
	list_for_each_safe(entry, temp, &hw->ctlxq.completing) {
		hfa384x_usbctlx_t *ctlx;

		ctlx = list_entry(entry, hfa384x_usbctlx_t, list);

		/* Call the completion function that this
		 * command was assigned, assuming it has one.
		 */
		if ( ctlx->cmdcb != NULL ) {
			spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
			ctlx->cmdcb(hw, ctlx);
			spin_lock_irqsave(&hw->ctlxq.lock, flags);

			/* Make sure we don't try and complete
			 * this CTLX more than once!
			 */
			ctlx->cmdcb = NULL;

			/* Did someone yank the adapter out
			 * while our list was (briefly) unlocked?
			 */
			if ( hw->wlandev->hwremoved )
			{
				reap = 0;
				break;
			}
		}

		/*
		 * "Reapable" CTLXs are ones which don't have any
		 * threads waiting for them to die. Hence they must
		 * be delivered to The Reaper!
		 */
		if ( ctlx->reapable ) {
			/* Move the CTLX off the "completing" list (hopefully)
			 * on to the "reapable" list where the reaper task
			 * can find it. And "reapable" means that this CTLX
			 * isn't sitting on a wait-queue somewhere.
			 */
			list_move_tail(&ctlx->list, &hw->ctlxq.reapable);
			reap = 1;
		}

		complete(&ctlx->done);
	}
	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);

	if (reap)
		tasklet_schedule(&hw->reaper_bh);
}

/*----------------------------------------------------------------
* unlocked_usbctlx_cancel_async
*
* Mark the CTLX dead asynchronously, and ensure that the
* next command on the queue is run afterwards.
*
* Arguments:
*	hw	ptr to the hfa384x_t structure
*	ctlx	ptr to a CTLX structure
*
* Returns:
*	0	the CTLX's URB is inactive
* -EINPROGRESS	the URB is currently being unlinked
*
* Call context:
*	Either process or interrupt, but presumably interrupt
----------------------------------------------------------------*/
static int unlocked_usbctlx_cancel_async(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx)
{
	int ret;

	/*
	 * Try to delete the URB containing our request packet.
	 * If we succeed, then its completion handler will be
	 * called with a status of -ECONNRESET.
	 */
	hw->ctlx_urb.transfer_flags |= URB_ASYNC_UNLINK;
	ret = usb_unlink_urb(&hw->ctlx_urb);

	if (ret != -EINPROGRESS) {
		/*
		 * The OUT URB had either already completed
		 * or was still in the pending queue, so the
		 * URB's completion function will not be called.
		 * We will have to complete the CTLX ourselves.
		 */
		ctlx->state = CTLX_REQ_FAILED;
		unlocked_usbctlx_complete(hw, ctlx);
		ret = 0;
	}

	return ret;
}

/*----------------------------------------------------------------
* unlocked_usbctlx_complete
*
* A CTLX has completed.  It may have been successful, it may not
* have been. At this point, the CTLX should be quiescent.  The URBs
* aren't active and the timers should have been stopped.
*
* The CTLX is migrated to the "completing" queue, and the completing
* tasklet is scheduled.
*
* Arguments:
*	hw		ptr to a hfa384x_t structure
*	ctlx		ptr to a ctlx structure
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	Either, assume interrupt
----------------------------------------------------------------*/
static void unlocked_usbctlx_complete(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx)
{
	/* Timers have been stopped, and ctlx should be in
	 * a terminal state. Retire it from the "active"
	 * queue.
	 */
	list_move_tail(&ctlx->list, &hw->ctlxq.completing);
	tasklet_schedule(&hw->completion_bh);

	switch (ctlx->state) {
	case CTLX_COMPLETE:
	case CTLX_REQ_FAILED:
		/* This are the correct terminating states. */
		break;

	default:
		printk(KERN_ERR "CTLX[%d] not in a terminating state(%s)\n",
		               hfa384x2host_16(ctlx->outbuf.type),
		               ctlxstr(ctlx->state));
		break;
	} /* switch */
}

/*----------------------------------------------------------------
* hfa384x_usbctlxq_run
*
* Checks to see if the head item is running.  If not, starts it.
*
* Arguments:
*	hw	ptr to hfa384x_t
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	any
----------------------------------------------------------------*/
static void
hfa384x_usbctlxq_run(hfa384x_t	*hw)
{
	unsigned long		flags;

	/* acquire lock */
	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	/* Only one active CTLX at any one time, because there's no
	 * other (reliable) way to match the response URB to the
	 * correct CTLX.
	 *
	 * Don't touch any of these CTLXs if the hardware
	 * has been removed or the USB subsystem is stalled.
	 */
	if ( !list_empty(&hw->ctlxq.active) ||
	     test_bit(WORK_TX_HALT, &hw->usb_flags) ||
	     hw->wlandev->hwremoved )
		goto unlock;

	while ( !list_empty(&hw->ctlxq.pending) ) {
		hfa384x_usbctlx_t	*head;
		int			result;

		/* This is the first pending command */
		head = list_entry(hw->ctlxq.pending.next,
		                  hfa384x_usbctlx_t,
		                  list);

		/* We need to split this off to avoid a race condition */
		list_move_tail(&head->list, &hw->ctlxq.active);

		/* Fill the out packet */
		usb_fill_bulk_urb( &(hw->ctlx_urb), hw->usb,
		                   hw->endp_out,
		                   &(head->outbuf), ROUNDUP64(head->outbufsize),
		                   hfa384x_ctlxout_callback, hw);
		hw->ctlx_urb.transfer_flags |= USB_QUEUE_BULK;

		/* Now submit the URB and update the CTLX's state
		 */
		if ((result = SUBMIT_URB(&hw->ctlx_urb, GFP_ATOMIC)) == 0) {
			/* This CTLX is now running on the active queue */
			head->state = CTLX_REQ_SUBMITTED;

			/* Start the OUT wait timer */
			hw->req_timer_done = 0;
			hw->reqtimer.expires = jiffies + HZ;
			add_timer(&hw->reqtimer);

			/* Start the IN wait timer */
			hw->resp_timer_done = 0;
			hw->resptimer.expires = jiffies + 2*HZ;
			add_timer(&hw->resptimer);

			break;
		}

		if (result == -EPIPE) {
			/* The OUT pipe needs resetting, so put
			 * this CTLX back in the "pending" queue
			 * and schedule a reset ...
			 */
			printk(KERN_WARNING "%s tx pipe stalled: requesting reset\n",
			                 hw->wlandev->netdev->name);
			list_move(&head->list, &hw->ctlxq.pending);
			set_bit(WORK_TX_HALT, &hw->usb_flags);
			schedule_work(&hw->usb_work);
			break;
		}

		if (result == -ESHUTDOWN) {
			printk(KERN_WARNING "%s urb shutdown!\n",
					 hw->wlandev->netdev->name);
			break;
		}

		printk(KERN_ERR "Failed to submit CTLX[%d]: error=%d\n",
		               hfa384x2host_16(head->outbuf.type), result);
		unlocked_usbctlx_complete(hw, head);
	} /* while */

	unlock:
	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
}


/*----------------------------------------------------------------
* hfa384x_usbin_callback
*
* Callback for URBs on the BULKIN endpoint.
*
* Arguments:
*	urb		ptr to the completed urb
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_usbin_callback(struct urb *urb)
{
	wlandevice_t		*wlandev = urb->context;
	hfa384x_t		*hw;
	hfa384x_usbin_t		*usbin = (hfa384x_usbin_t *) urb->transfer_buffer;
	struct sk_buff          *skb = NULL;
	int			result;
	int                     urb_status;
	u16			type;

	enum USBIN_ACTION {
		HANDLE,
		RESUBMIT,
		ABORT
	} action;

	if ( !wlandev ||
	     !wlandev->netdev ||
	     wlandev->hwremoved )
		goto exit;

	hw = wlandev->priv;
	if (!hw)
		goto exit;

	skb = hw->rx_urb_skb;
	if (!skb || (skb->data != urb->transfer_buffer)) {
		BUG();
	}
	hw->rx_urb_skb = NULL;

	/* Check for error conditions within the URB */
	switch (urb->status) {
	case 0:
		action = HANDLE;

		/* Check for short packet */
		if ( urb->actual_length == 0 ) {
			++(wlandev->linux_stats.rx_errors);
			++(wlandev->linux_stats.rx_length_errors);
			action = RESUBMIT;
		}
		break;

	case -EPIPE:
		printk(KERN_WARNING "%s rx pipe stalled: requesting reset\n",
		                 wlandev->netdev->name);
		if ( !test_and_set_bit(WORK_RX_HALT, &hw->usb_flags) )
			schedule_work(&hw->usb_work);
		++(wlandev->linux_stats.rx_errors);
		action = ABORT;
		break;

	case -EILSEQ:
	case -ETIMEDOUT:
	case -EPROTO:
		if ( !test_and_set_bit(THROTTLE_RX, &hw->usb_flags) &&
		     !timer_pending(&hw->throttle) ) {
			mod_timer(&hw->throttle, jiffies + THROTTLE_JIFFIES);
		}
		++(wlandev->linux_stats.rx_errors);
		action = ABORT;
		break;

	case -EOVERFLOW:
		++(wlandev->linux_stats.rx_over_errors);
		action = RESUBMIT;
		break;

	case -ENODEV:
	case -ESHUTDOWN:
		pr_debug("status=%d, device removed.\n", urb->status);
		action = ABORT;
		break;

	case -ENOENT:
	case -ECONNRESET:
		pr_debug("status=%d, urb explicitly unlinked.\n", urb->status);
		action = ABORT;
		break;

	default:
		pr_debug("urb status=%d, transfer flags=0x%x\n",
		                 urb->status, urb->transfer_flags);
		++(wlandev->linux_stats.rx_errors);
		action = RESUBMIT;
		break;
	}

	urb_status = urb->status;

	if (action != ABORT) {
		/* Repost the RX URB */
		result = submit_rx_urb(hw, GFP_ATOMIC);

		if (result != 0) {
			printk(KERN_ERR
				"Fatal, failed to resubmit rx_urb. error=%d\n",
				result);
		}
	}

	/* Handle any USB-IN packet */
	/* Note: the check of the sw_support field, the type field doesn't
	 *       have bit 12 set like the docs suggest.
	 */
	type = hfa384x2host_16(usbin->type);
	if (HFA384x_USB_ISRXFRM(type)) {
		if (action == HANDLE) {
			if (usbin->txfrm.desc.sw_support == 0x0123) {
				hfa384x_usbin_txcompl(wlandev, usbin);
			} else {
				skb_put(skb, sizeof(*usbin));
				hfa384x_usbin_rx(wlandev, skb);
				skb = NULL;
			}
		}
		goto exit;
	}
	if (HFA384x_USB_ISTXFRM(type)) {
		if (action == HANDLE)
			hfa384x_usbin_txcompl(wlandev, usbin);
		goto exit;
	}
	switch (type) {
	case HFA384x_USB_INFOFRM:
		if (action == ABORT)
			goto exit;
		if (action == HANDLE)
			hfa384x_usbin_info(wlandev, usbin);
		break;

	case HFA384x_USB_CMDRESP:
	case HFA384x_USB_WRIDRESP:
	case HFA384x_USB_RRIDRESP:
	case HFA384x_USB_WMEMRESP:
	case HFA384x_USB_RMEMRESP:
		/* ALWAYS, ALWAYS, ALWAYS handle this CTLX!!!! */
		hfa384x_usbin_ctlx(hw, usbin, urb_status);
		break;

	case HFA384x_USB_BUFAVAIL:
		pr_debug("Received BUFAVAIL packet, frmlen=%d\n",
			usbin->bufavail.frmlen);
		break;

	case HFA384x_USB_ERROR:
		pr_debug("Received USB_ERROR packet, errortype=%d\n",
			usbin->usberror.errortype);
		break;

	default:
		pr_debug("Unrecognized USBIN packet, type=%x, status=%d\n",
			usbin->type, urb_status);
		break;
	} /* switch */

exit:

	if (skb)
		dev_kfree_skb(skb);
}


/*----------------------------------------------------------------
* hfa384x_usbin_ctlx
*
* We've received a URB containing a Prism2 "response" message.
* This message needs to be matched up with a CTLX on the active
* queue and our state updated accordingly.
*
* Arguments:
*	hw		ptr to hfa384x_t
*	usbin		ptr to USB IN packet
*	urb_status	status of this Bulk-In URB
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_usbin_ctlx(hfa384x_t *hw, hfa384x_usbin_t *usbin,
			       int urb_status)
{
	hfa384x_usbctlx_t	*ctlx;
	int			run_queue = 0;
	unsigned long		flags;

retry:
	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	/* There can be only one CTLX on the active queue
	 * at any one time, and this is the CTLX that the
	 * timers are waiting for.
	 */
	if ( list_empty(&hw->ctlxq.active) ) {
		goto unlock;
	}

	/* Remove the "response timeout". It's possible that
	 * we are already too late, and that the timeout is
	 * already running. And that's just too bad for us,
	 * because we could lose our CTLX from the active
	 * queue here ...
	 */
	if (del_timer(&hw->resptimer) == 0) {
		if (hw->resp_timer_done == 0) {
			spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
			goto retry;
		}
	}
	else {
		hw->resp_timer_done = 1;
	}

	ctlx = get_active_ctlx(hw);

	if (urb_status != 0) {
		/*
		 * Bad CTLX, so get rid of it. But we only
		 * remove it from the active queue if we're no
		 * longer expecting the OUT URB to complete.
		 */
		if (unlocked_usbctlx_cancel_async(hw, ctlx) == 0)
			run_queue = 1;
	} else {
		const u16 intype = (usbin->type&~host2hfa384x_16(0x8000));

		/*
		 * Check that our message is what we're expecting ...
		 */
		if (ctlx->outbuf.type != intype) {
			printk(KERN_WARNING "Expected IN[%d], received IN[%d] - ignored.\n",
			                 hfa384x2host_16(ctlx->outbuf.type),
			                 hfa384x2host_16(intype));
			goto unlock;
		}

		/* This URB has succeeded, so grab the data ... */
		memcpy(&ctlx->inbuf, usbin, sizeof(ctlx->inbuf));

		switch (ctlx->state) {
		case CTLX_REQ_SUBMITTED:
			/*
			 * We have received our response URB before
			 * our request has been acknowledged. Odd,
			 * but our OUT URB is still alive...
			 */
			pr_debug("Causality violation: please reboot Universe, or email linux-wlan-devel@lists.linux-wlan.com\n");
			ctlx->state = CTLX_RESP_COMPLETE;
			break;

		case CTLX_REQ_COMPLETE:
			/*
			 * This is the usual path: our request
			 * has already been acknowledged, and
			 * now we have received the reply too.
			 */
			ctlx->state = CTLX_COMPLETE;
			unlocked_usbctlx_complete(hw, ctlx);
			run_queue = 1;
			break;

		default:
			/*
			 * Throw this CTLX away ...
			 */
			printk(KERN_ERR "Matched IN URB, CTLX[%d] in invalid state(%s)."
			               " Discarded.\n",
			               hfa384x2host_16(ctlx->outbuf.type),
			               ctlxstr(ctlx->state));
			if (unlocked_usbctlx_cancel_async(hw, ctlx) == 0)
				run_queue = 1;
			break;
		} /* switch */
	}

unlock:
	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);

	if (run_queue)
		hfa384x_usbctlxq_run(hw);
}


/*----------------------------------------------------------------
* hfa384x_usbin_txcompl
*
* At this point we have the results of a previous transmit.
*
* Arguments:
*	wlandev		wlan device
*	usbin		ptr to the usb transfer buffer
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_usbin_txcompl(wlandevice_t *wlandev, hfa384x_usbin_t *usbin)
{
	u16			status;

	status = hfa384x2host_16(usbin->type); /* yeah I know it says type...*/

	/* Was there an error? */
	if (HFA384x_TXSTATUS_ISERROR(status)) {
		prism2sta_ev_txexc(wlandev, status);
	} else {
		prism2sta_ev_tx(wlandev, status);
	}
	// prism2sta_ev_alloc(wlandev);
}


/*----------------------------------------------------------------
* hfa384x_usbin_rx
*
* At this point we have a successful received a rx frame packet.
*
* Arguments:
*	wlandev		wlan device
*	usbin		ptr to the usb transfer buffer
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_usbin_rx(wlandevice_t *wlandev, struct sk_buff *skb)
{
	hfa384x_usbin_t         *usbin = (hfa384x_usbin_t *) skb->data;
	hfa384x_t               *hw = wlandev->priv;
	int                     hdrlen;
	p80211_rxmeta_t         *rxmeta;
	u16                  data_len;
	u16                  fc;

	/* Byte order convert once up front. */
	usbin->rxfrm.desc.status =
		hfa384x2host_16(usbin->rxfrm.desc.status);
	usbin->rxfrm.desc.time =
		hfa384x2host_32(usbin->rxfrm.desc.time);

	/* Now handle frame based on port# */
	switch( HFA384x_RXSTATUS_MACPORT_GET(usbin->rxfrm.desc.status) )
	{
	case 0:
		fc = le16_to_cpu(usbin->rxfrm.desc.frame_control);

		/* If exclude and we receive an unencrypted, drop it */
		if ( (wlandev->hostwep & HOSTWEP_EXCLUDEUNENCRYPTED) &&
		     !WLAN_GET_FC_ISWEP(fc)){
			goto done;
		}

		data_len = hfa384x2host_16(usbin->rxfrm.desc.data_len);

		/* How much header data do we have? */
		hdrlen = p80211_headerlen(fc);

		/* Pull off the descriptor */
		skb_pull(skb, sizeof(hfa384x_rx_frame_t));

		/* Now shunt the header block up against the data block
		 * with an "overlapping" copy
		 */
		memmove(skb_push(skb, hdrlen),
		        &usbin->rxfrm.desc.frame_control,
		        hdrlen);

		skb->dev = wlandev->netdev;
		skb->dev->last_rx = jiffies;

		/* And set the frame length properly */
		skb_trim(skb, data_len + hdrlen);

		/* The prism2 series does not return the CRC */
		memset(skb_put(skb, WLAN_CRC_LEN), 0xff, WLAN_CRC_LEN);

		skb_reset_mac_header(skb);

		/* Attach the rxmeta, set some stuff */
		p80211skb_rxmeta_attach(wlandev, skb);
		rxmeta = P80211SKB_RXMETA(skb);
		rxmeta->mactime = usbin->rxfrm.desc.time;
		rxmeta->rxrate = usbin->rxfrm.desc.rate;
		rxmeta->signal = usbin->rxfrm.desc.signal - hw->dbmadjust;
		rxmeta->noise = usbin->rxfrm.desc.silence - hw->dbmadjust;

		prism2sta_ev_rx(wlandev, skb);

		break;

	case 7:
		if ( ! HFA384x_RXSTATUS_ISFCSERR(usbin->rxfrm.desc.status) ) {
			/* Copy to wlansnif skb */
			hfa384x_int_rxmonitor( wlandev, &usbin->rxfrm);
			dev_kfree_skb(skb);
		} else {
			pr_debug("Received monitor frame: FCSerr set\n");
		}
		break;

	default:
		printk(KERN_WARNING "Received frame on unsupported port=%d\n",
			HFA384x_RXSTATUS_MACPORT_GET(usbin->rxfrm.desc.status) );
		goto done;
		break;
	}

done:
	return;
}

/*----------------------------------------------------------------
* hfa384x_int_rxmonitor
*
* Helper function for int_rx.  Handles monitor frames.
* Note that this function allocates space for the FCS and sets it
* to 0xffffffff.  The hfa384x doesn't give us the FCS value but the
* higher layers expect it.  0xffffffff is used as a flag to indicate
* the FCS is bogus.
*
* Arguments:
*	wlandev		wlan device structure
*	rxfrm		rx descriptor read from card in int_rx
*
* Returns:
*	nothing
*
* Side effects:
*	Allocates an skb and passes it up via the PF_PACKET interface.
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_int_rxmonitor( wlandevice_t *wlandev, hfa384x_usb_rxfrm_t *rxfrm)
{
	hfa384x_rx_frame_t              *rxdesc = &(rxfrm->desc);
	unsigned int				hdrlen = 0;
	unsigned int				datalen = 0;
	unsigned int				skblen = 0;
	u8				*datap;
	u16				fc;
	struct sk_buff			*skb;
	hfa384x_t		        *hw = wlandev->priv;

	/* Don't forget the status, time, and data_len fields are in host order */
	/* Figure out how big the frame is */
	fc = le16_to_cpu(rxdesc->frame_control);
	hdrlen = p80211_headerlen(fc);
	datalen = hfa384x2host_16(rxdesc->data_len);

	/* Allocate an ind message+framesize skb */
	skblen = sizeof(p80211_caphdr_t) +
		hdrlen + datalen + WLAN_CRC_LEN;

	/* sanity check the length */
	if ( skblen >
	     (sizeof(p80211_caphdr_t) +
	      WLAN_HDR_A4_LEN + WLAN_DATA_MAXLEN + WLAN_CRC_LEN) ) {
		pr_debug("overlen frm: len=%zd\n",
			       skblen - sizeof(p80211_caphdr_t));
	}

	if ( (skb = dev_alloc_skb(skblen)) == NULL ) {
		printk(KERN_ERR "alloc_skb failed trying to allocate %d bytes\n", skblen);
		return;
	}

	/* only prepend the prism header if in the right mode */
	if ((wlandev->netdev->type == ARPHRD_IEEE80211_PRISM) &&
	    (hw->sniffhdr != 0)) {
		p80211_caphdr_t		*caphdr;
		/* The NEW header format! */
		datap = skb_put(skb, sizeof(p80211_caphdr_t));
		caphdr = (p80211_caphdr_t*) datap;

		caphdr->version =	htonl(P80211CAPTURE_VERSION);
		caphdr->length =	htonl(sizeof(p80211_caphdr_t));
		caphdr->mactime =	__cpu_to_be64(rxdesc->time) * 1000;
		caphdr->hosttime =	__cpu_to_be64(jiffies);
		caphdr->phytype =	htonl(4); /* dss_dot11_b */
		caphdr->channel =	htonl(hw->sniff_channel);
		caphdr->datarate =	htonl(rxdesc->rate);
		caphdr->antenna =	htonl(0); /* unknown */
		caphdr->priority =	htonl(0); /* unknown */
		caphdr->ssi_type =	htonl(3); /* rssi_raw */
		caphdr->ssi_signal =	htonl(rxdesc->signal);
		caphdr->ssi_noise =	htonl(rxdesc->silence);
		caphdr->preamble =	htonl(0); /* unknown */
		caphdr->encoding =	htonl(1); /* cck */
	}

	/* Copy the 802.11 header to the skb (ctl frames may be less than a full header) */
	datap = skb_put(skb, hdrlen);
	memcpy( datap, &(rxdesc->frame_control), hdrlen);

	/* If any, copy the data from the card to the skb */
	if ( datalen > 0 )
	{
		datap = skb_put(skb, datalen);
		memcpy(datap, rxfrm->data, datalen);

		/* check for unencrypted stuff if WEP bit set. */
		if (*(datap - hdrlen + 1) & 0x40) // wep set
		  if ((*(datap) == 0xaa) && (*(datap+1) == 0xaa))
		    *(datap - hdrlen + 1) &= 0xbf; // clear wep; it's the 802.2 header!
	}

	if (hw->sniff_fcs) {
		/* Set the FCS */
		datap = skb_put(skb, WLAN_CRC_LEN);
		memset( datap, 0xff, WLAN_CRC_LEN);
	}

	/* pass it back up */
	prism2sta_ev_rx(wlandev, skb);

	return;
}


/*----------------------------------------------------------------
* hfa384x_usbin_info
*
* At this point we have a successful received a Prism2 info frame.
*
* Arguments:
*	wlandev		wlan device
*	usbin		ptr to the usb transfer buffer
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_usbin_info(wlandevice_t *wlandev, hfa384x_usbin_t *usbin)
{
	usbin->infofrm.info.framelen = hfa384x2host_16(usbin->infofrm.info.framelen);
	prism2sta_ev_info(wlandev, &usbin->infofrm.info);
}


/*----------------------------------------------------------------
* hfa384x_usbout_callback
*
* Callback for URBs on the BULKOUT endpoint.
*
* Arguments:
*	urb		ptr to the completed urb
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_usbout_callback(struct urb *urb)
{
	wlandevice_t		*wlandev = urb->context;
	hfa384x_usbout_t	*usbout = urb->transfer_buffer;

#ifdef DEBUG_USB
	dbprint_urb(urb);
#endif

	if ( wlandev &&
	     wlandev->netdev ) {

		switch(urb->status) {
		case 0:
			hfa384x_usbout_tx(wlandev, usbout);
			break;

		case -EPIPE:
		{
			hfa384x_t *hw = wlandev->priv;
			printk(KERN_WARNING "%s tx pipe stalled: requesting reset\n",
			                 wlandev->netdev->name);
			if ( !test_and_set_bit(WORK_TX_HALT, &hw->usb_flags) )
				schedule_work(&hw->usb_work);
			++(wlandev->linux_stats.tx_errors);
			break;
		}

		case -EPROTO:
		case -ETIMEDOUT:
		case -EILSEQ:
		{
			hfa384x_t *hw = wlandev->priv;

			if ( !test_and_set_bit(THROTTLE_TX, &hw->usb_flags)
			     && !timer_pending(&hw->throttle) ) {
				mod_timer(&hw->throttle,
				          jiffies + THROTTLE_JIFFIES);
			}
			++(wlandev->linux_stats.tx_errors);
			netif_stop_queue(wlandev->netdev);
			break;
		}

		case -ENOENT:
		case -ESHUTDOWN:
			/* Ignorable errors */
			break;

		default:
			printk(KERN_INFO "unknown urb->status=%d\n", urb->status);
			++(wlandev->linux_stats.tx_errors);
			break;
		} /* switch */
	}
}


/*----------------------------------------------------------------
* hfa384x_ctlxout_callback
*
* Callback for control data on the BULKOUT endpoint.
*
* Arguments:
*	urb		ptr to the completed urb
*
* Returns:
* nothing
*
* Side effects:
*
* Call context:
* interrupt
----------------------------------------------------------------*/
static void hfa384x_ctlxout_callback(struct urb *urb)
{
	hfa384x_t	*hw = urb->context;
	int             delete_resptimer = 0;
	int             timer_ok = 1;
	int		run_queue = 0;
	hfa384x_usbctlx_t	*ctlx;
	unsigned long	flags;

	pr_debug("urb->status=%d\n", urb->status);
#ifdef DEBUG_USB
	dbprint_urb(urb);
#endif
	if ( (urb->status == -ESHUTDOWN) ||
	     (urb->status == -ENODEV) ||
	     (hw == NULL) )
		goto done;

retry:
	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	/*
	 * Only one CTLX at a time on the "active" list, and
	 * none at all if we are unplugged. However, we can
	 * rely on the disconnect function to clean everything
	 * up if someone unplugged the adapter.
	 */
	if ( list_empty(&hw->ctlxq.active) ) {
		spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
		goto done;
	}

	/*
	 * Having something on the "active" queue means
	 * that we have timers to worry about ...
	 */
	if (del_timer(&hw->reqtimer) == 0) {
		if (hw->req_timer_done == 0) {
			/*
			 * This timer was actually running while we
			 * were trying to delete it. Let it terminate
			 * gracefully instead.
			 */
			spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
			goto retry;
		}
	}
	else {
		hw->req_timer_done = 1;
	}

	ctlx = get_active_ctlx(hw);

	if ( urb->status == 0 ) {
		/* Request portion of a CTLX is successful */
		switch ( ctlx->state ) {
		case CTLX_REQ_SUBMITTED:
			/* This OUT-ACK received before IN */
			ctlx->state = CTLX_REQ_COMPLETE;
			break;

		case CTLX_RESP_COMPLETE:
			/* IN already received before this OUT-ACK,
			 * so this command must now be complete.
			 */
			ctlx->state = CTLX_COMPLETE;
			unlocked_usbctlx_complete(hw, ctlx);
			run_queue = 1;
			break;

		default:
			/* This is NOT a valid CTLX "success" state! */
			printk(KERN_ERR
			    "Illegal CTLX[%d] success state(%s, %d) in OUT URB\n",
			    hfa384x2host_16(ctlx->outbuf.type),
			    ctlxstr(ctlx->state), urb->status);
			break;
		} /* switch */
	} else {
		/* If the pipe has stalled then we need to reset it */
		if ( (urb->status == -EPIPE) &&
		      !test_and_set_bit(WORK_TX_HALT, &hw->usb_flags) ) {
			printk(KERN_WARNING "%s tx pipe stalled: requesting reset\n",
			                 hw->wlandev->netdev->name);
			schedule_work(&hw->usb_work);
		}

		/* If someone cancels the OUT URB then its status
		 * should be either -ECONNRESET or -ENOENT.
		 */
		ctlx->state = CTLX_REQ_FAILED;
		unlocked_usbctlx_complete(hw, ctlx);
		delete_resptimer = 1;
		run_queue = 1;
	}

 delresp:
	if (delete_resptimer) {
		if ((timer_ok = del_timer(&hw->resptimer)) != 0) {
			hw->resp_timer_done = 1;
		}
	}

	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);

	if ( !timer_ok && (hw->resp_timer_done == 0) ) {
		spin_lock_irqsave(&hw->ctlxq.lock, flags);
		goto delresp;
	}

	if (run_queue)
		hfa384x_usbctlxq_run(hw);

 done:
        ;
}


/*----------------------------------------------------------------
* hfa384x_usbctlx_reqtimerfn
*
* Timer response function for CTLX request timeouts.  If this
* function is called, it means that the callback for the OUT
* URB containing a Prism2.x XXX_Request was never called.
*
* Arguments:
*	data		a ptr to the hfa384x_t
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void
hfa384x_usbctlx_reqtimerfn(unsigned long data)
{
	hfa384x_t	*hw = (hfa384x_t*)data;
	unsigned long   flags;

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	hw->req_timer_done = 1;

	/* Removing the hardware automatically empties
	 * the active list ...
	 */
	if ( !list_empty(&hw->ctlxq.active) )
	{
		/*
		 * We must ensure that our URB is removed from
		 * the system, if it hasn't already expired.
		 */
		hw->ctlx_urb.transfer_flags |= URB_ASYNC_UNLINK;
		if (usb_unlink_urb(&hw->ctlx_urb) == -EINPROGRESS)
		{
			hfa384x_usbctlx_t *ctlx = get_active_ctlx(hw);

			ctlx->state = CTLX_REQ_FAILED;

			/* This URB was active, but has now been
			 * cancelled. It will now have a status of
			 * -ECONNRESET in the callback function.
			 *
			 * We are cancelling this CTLX, so we're
			 * not going to need to wait for a response.
			 * The URB's callback function will check
			 * that this timer is truly dead.
			 */
			if (del_timer(&hw->resptimer) != 0)
				hw->resp_timer_done = 1;
		}
	}

	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
}


/*----------------------------------------------------------------
* hfa384x_usbctlx_resptimerfn
*
* Timer response function for CTLX response timeouts.  If this
* function is called, it means that the callback for the IN
* URB containing a Prism2.x XXX_Response was never called.
*
* Arguments:
*	data		a ptr to the hfa384x_t
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void
hfa384x_usbctlx_resptimerfn(unsigned long data)
{
	hfa384x_t *hw = (hfa384x_t*)data;
	unsigned long   flags;

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	hw->resp_timer_done = 1;

	/* The active list will be empty if the
	 * adapter has been unplugged ...
	 */
	if ( !list_empty(&hw->ctlxq.active) )
	{
		hfa384x_usbctlx_t *ctlx = get_active_ctlx(hw);

		if ( unlocked_usbctlx_cancel_async(hw, ctlx) == 0 )
		{
			spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
			hfa384x_usbctlxq_run(hw);
			goto done;
		}
	}

	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);

 done:
        ;

}

/*----------------------------------------------------------------
* hfa384x_usb_throttlefn
*
*
* Arguments:
*	data	ptr to hw
*
* Returns:
*	Nothing
*
* Side effects:
*
* Call context:
*	Interrupt
----------------------------------------------------------------*/
static void
hfa384x_usb_throttlefn(unsigned long data)
{
	hfa384x_t *hw = (hfa384x_t*)data;
	unsigned long   flags;

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	/*
	 * We need to check BOTH the RX and the TX throttle controls,
	 * so we use the bitwise OR instead of the logical OR.
	 */
	pr_debug("flags=0x%lx\n", hw->usb_flags);
	if ( !hw->wlandev->hwremoved &&
	     (
	       (test_and_clear_bit(THROTTLE_RX, &hw->usb_flags) &&
	       !test_and_set_bit(WORK_RX_RESUME, &hw->usb_flags))
	       |
	       (test_and_clear_bit(THROTTLE_TX, &hw->usb_flags) &&
	        !test_and_set_bit(WORK_TX_RESUME, &hw->usb_flags))
	     ) )
	{
		schedule_work(&hw->usb_work);
	}

	spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
}


/*----------------------------------------------------------------
* hfa384x_usbctlx_submit
*
* Called from the doxxx functions to submit a CTLX to the queue
*
* Arguments:
*	hw		ptr to the hw struct
*	ctlx		ctlx structure to enqueue
*
* Returns:
*	-ENODEV if the adapter is unplugged
*	0
*
* Side effects:
*
* Call context:
*	process or interrupt
----------------------------------------------------------------*/
static int
hfa384x_usbctlx_submit(
	hfa384x_t		*hw,
	hfa384x_usbctlx_t	*ctlx)
{
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&hw->ctlxq.lock, flags);

	if (hw->wlandev->hwremoved) {
		spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
		ret = -ENODEV;
	} else {
		ctlx->state = CTLX_PENDING;
		list_add_tail(&ctlx->list, &hw->ctlxq.pending);

		spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
		hfa384x_usbctlxq_run(hw);
		ret = 0;
	}

	return ret;
}


/*----------------------------------------------------------------
* hfa384x_usbout_tx
*
* At this point we have finished a send of a frame.  Mark the URB
* as available and call ev_alloc to notify higher layers we're
* ready for more.
*
* Arguments:
*	wlandev		wlan device
*	usbout		ptr to the usb transfer buffer
*
* Returns:
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
static void hfa384x_usbout_tx(wlandevice_t *wlandev, hfa384x_usbout_t *usbout)
{
	prism2sta_ev_alloc(wlandev);
}

/*----------------------------------------------------------------
* hfa384x_isgood_pdrcore
*
* Quick check of PDR codes.
*
* Arguments:
*	pdrcode		PDR code number (host order)
*
* Returns:
*	zero		not good.
*	one		is good.
*
* Side effects:
*
* Call context:
----------------------------------------------------------------*/
static int
hfa384x_isgood_pdrcode(u16 pdrcode)
{
	switch(pdrcode) {
	case HFA384x_PDR_END_OF_PDA:
	case HFA384x_PDR_PCB_PARTNUM:
	case HFA384x_PDR_PDAVER:
	case HFA384x_PDR_NIC_SERIAL:
	case HFA384x_PDR_MKK_MEASUREMENTS:
	case HFA384x_PDR_NIC_RAMSIZE:
	case HFA384x_PDR_MFISUPRANGE:
	case HFA384x_PDR_CFISUPRANGE:
	case HFA384x_PDR_NICID:
	case HFA384x_PDR_MAC_ADDRESS:
	case HFA384x_PDR_REGDOMAIN:
	case HFA384x_PDR_ALLOWED_CHANNEL:
	case HFA384x_PDR_DEFAULT_CHANNEL:
	case HFA384x_PDR_TEMPTYPE:
	case HFA384x_PDR_IFR_SETTING:
	case HFA384x_PDR_RFR_SETTING:
	case HFA384x_PDR_HFA3861_BASELINE:
	case HFA384x_PDR_HFA3861_SHADOW:
	case HFA384x_PDR_HFA3861_IFRF:
	case HFA384x_PDR_HFA3861_CHCALSP:
	case HFA384x_PDR_HFA3861_CHCALI:
	case HFA384x_PDR_3842_NIC_CONFIG:
	case HFA384x_PDR_USB_ID:
	case HFA384x_PDR_PCI_ID:
	case HFA384x_PDR_PCI_IFCONF:
	case HFA384x_PDR_PCI_PMCONF:
	case HFA384x_PDR_RFENRGY:
	case HFA384x_PDR_HFA3861_MANF_TESTSP:
	case HFA384x_PDR_HFA3861_MANF_TESTI:
		/* code is OK */
		return 1;
		break;
	default:
		if ( pdrcode < 0x1000 ) {
			/* code is OK, but we don't know exactly what it is */
			pr_debug(
				"Encountered unknown PDR#=0x%04x, "
				"assuming it's ok.\n",
				pdrcode);
			return 1;
		} else {
			/* bad code */
			pr_debug(
				"Encountered unknown PDR#=0x%04x, "
				"(>=0x1000), assuming it's bad.\n",
				pdrcode);
			return 0;
		}
		break;
	}
	return 0; /* avoid compiler warnings */
}