text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * Host AP (software wireless LAN access point) driver for
   * Intersil Prism2/2.5/3.
   *
   * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   * <j@w1.fi>
   * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
   *
   * FIX:
   * - there is currently no way of associating TX packets to correct wds device
   *   when TX Exc/OK event occurs, so all tx_packets and some
   *   tx_errors/tx_dropped are added to the main netdevice; using sw_support
   *   field in txdesc might be used to fix this (using Alloc event to increment
   *   tx_packets would need some further info in txfid table)
   *
   * Buffer Access Path (BAP) usage:
   *   Prism2 cards have two separate BAPs for accessing the card memory. These
   *   should allow concurrent access to two different frames and the driver
   *   previously used BAP0 for sending data and BAP1 for receiving data.
   *   However, there seems to be number of issues with concurrent access and at
   *   least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
   *   Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
   *   host and card memories. BAP0 accesses are protected with local->baplock
   *   (spin_lock_bh) to prevent concurrent use.
   */
  
  
  
  #include <asm/delay.h>
  #include <linux/uaccess.h>
  
  #include <linux/slab.h>
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>
  #include <linux/proc_fs.h>
  #include <linux/seq_file.h>
  #include <linux/if_arp.h>
  #include <linux/delay.h>
  #include <linux/random.h>
  #include <linux/wait.h>
  #include <linux/sched/signal.h>
  #include <linux/rtnetlink.h>
  #include <linux/wireless.h>
  #include <net/iw_handler.h>
  #include <net/lib80211.h>
  #include <asm/irq.h>
  
  #include "hostap_80211.h"
  #include "hostap.h"
  #include "hostap_ap.h"
  
  
  /* #define final_version */
  
  static int mtu = 1500;
  module_param(mtu, int, 0444);
  MODULE_PARM_DESC(mtu, "Maximum transfer unit");
  
  static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
  module_param_array(channel, int, NULL, 0444);
  MODULE_PARM_DESC(channel, "Initial channel");
  
  static char essid[33] = "test";
  module_param_string(essid, essid, sizeof(essid), 0444);
  MODULE_PARM_DESC(essid, "Host AP's ESSID");
  
  static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
  module_param_array(iw_mode, int, NULL, 0444);
  MODULE_PARM_DESC(iw_mode, "Initial operation mode");
  
  static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
  module_param_array(beacon_int, int, NULL, 0444);
  MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
  
  static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
  module_param_array(dtim_period, int, NULL, 0444);
  MODULE_PARM_DESC(dtim_period, "DTIM period");
  
  static char dev_template[16] = "wlan%d";
  module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
  MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
  		 "wlan%d)");
  
  #ifdef final_version
  #define EXTRA_EVENTS_WTERR 0
  #else
  /* check WTERR events (Wait Time-out) in development versions */
  #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
  #endif
  
  /* Events that will be using BAP0 */
  #define HFA384X_BAP0_EVENTS \
  	(HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
  
  /* event mask, i.e., events that will result in an interrupt */
  #define HFA384X_EVENT_MASK \
  	(HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
  	HFA384X_EV_CMD | HFA384X_EV_TICK | \
  	EXTRA_EVENTS_WTERR)
  
  /* Default TX control flags: use 802.11 headers and request interrupt for
   * failed transmits. Frames that request ACK callback, will add
   * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
   */
  #define HFA384X_TX_CTRL_FLAGS \
  	(HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
  
  
  /* ca. 1 usec */
  #define HFA384X_CMD_BUSY_TIMEOUT 5000
  #define HFA384X_BAP_BUSY_TIMEOUT 50000
  
  /* ca. 10 usec */
  #define HFA384X_CMD_COMPL_TIMEOUT 20000
  #define HFA384X_DL_COMPL_TIMEOUT 1000000
  
  /* Wait times for initialization; yield to other processes to avoid busy
   * waiting for long time. */
  #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
  #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
  
  
  static void prism2_hw_reset(struct net_device *dev);
  static void prism2_check_sta_fw_version(local_info_t *local);
  
  #ifdef PRISM2_DOWNLOAD_SUPPORT
  /* hostap_download.c */
  static const struct proc_ops prism2_download_aux_dump_proc_ops;
  static u8 * prism2_read_pda(struct net_device *dev);
  static int prism2_download(local_info_t *local,
  			   struct prism2_download_param *param);
  static void prism2_download_free_data(struct prism2_download_data *dl);
  static int prism2_download_volatile(local_info_t *local,
  				    struct prism2_download_data *param);
  static int prism2_download_genesis(local_info_t *local,
  				   struct prism2_download_data *param);
  static int prism2_get_ram_size(local_info_t *local);
  #endif /* PRISM2_DOWNLOAD_SUPPORT */
  
  
  
  
  #ifndef final_version
  /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
   * present */
  #define HFA384X_MAGIC 0x8A32
  #endif
  
  static void hfa384x_read_regs(struct net_device *dev,
  			      struct hfa384x_regs *regs)
  {
  	regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
  	regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
  	regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
  	regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
  	regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
  }
  
  
  /**
   * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
   * @local: pointer to private Host AP driver data
   * @entry: Prism2 command queue entry to be freed
   * @del_req: request the entry to be removed
   *
   * Internal helper function for freeing Prism2 command queue entries.
   * Caller must have acquired local->cmdlock before calling this function.
   */
  static inline void __hostap_cmd_queue_free(local_info_t *local,
  					   struct hostap_cmd_queue *entry,
  					   int del_req)
  {
  	if (del_req) {
  		entry->del_req = 1;
  		if (!list_empty(&entry->list)) {
  			list_del_init(&entry->list);
  			local->cmd_queue_len--;
  		}
  	}
  
  	if (refcount_dec_and_test(&entry->usecnt) && entry->del_req)
  		kfree(entry);
  }
  
  
  /**
   * hostap_cmd_queue_free - Free Prism2 command queue entry
   * @local: pointer to private Host AP driver data
   * @entry: Prism2 command queue entry to be freed
   * @del_req: request the entry to be removed
   *
   * Free a Prism2 command queue entry.
   */
  static inline void hostap_cmd_queue_free(local_info_t *local,
  					 struct hostap_cmd_queue *entry,
  					 int del_req)
  {
  	unsigned long flags;
  
  	spin_lock_irqsave(&local->cmdlock, flags);
  	__hostap_cmd_queue_free(local, entry, del_req);
  	spin_unlock_irqrestore(&local->cmdlock, flags);
  }
  
  
  /**
   * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
   * @local: pointer to private Host AP driver data
   */
  static void prism2_clear_cmd_queue(local_info_t *local)
  {
  	struct list_head *ptr, *n;
  	unsigned long flags;
  	struct hostap_cmd_queue *entry;
  
  	spin_lock_irqsave(&local->cmdlock, flags);
  	list_for_each_safe(ptr, n, &local->cmd_queue) {
  		entry = list_entry(ptr, struct hostap_cmd_queue, list);
  		refcount_inc(&entry->usecnt);
  		printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
  		       "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
  		       local->dev->name, entry->type, entry->cmd,
  		       entry->param0);
  		__hostap_cmd_queue_free(local, entry, 1);
  	}
  	if (local->cmd_queue_len) {
  		/* This should not happen; print debug message and clear
  		 * queue length. */
  		printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
  		       "flush\n", local->dev->name, local->cmd_queue_len);
  		local->cmd_queue_len = 0;
  	}
  	spin_unlock_irqrestore(&local->cmdlock, flags);
  }
  
  
  /**
   * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
   * @dev: pointer to net_device
   * @entry: Prism2 command queue entry to be issued
   */
  static int hfa384x_cmd_issue(struct net_device *dev,
  				    struct hostap_cmd_queue *entry)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int tries;
  	u16 reg;
  	unsigned long flags;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->func->card_present && !local->func->card_present(local))
  		return -ENODEV;
  
  	if (entry->issued) {
  		printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
  		       dev->name, entry);
  	}
  
  	/* wait until busy bit is clear; this should always be clear since the
  	 * commands are serialized */
  	tries = HFA384X_CMD_BUSY_TIMEOUT;
  	while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
  		tries--;
  		udelay(1);
  	}
  #ifndef final_version
  	if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
  		prism2_io_debug_error(dev, 1);
  		printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
  		       "for %d usec\n", dev->name,
  		       HFA384X_CMD_BUSY_TIMEOUT - tries);
  	}
  #endif
  	if (tries == 0) {
  		reg = HFA384X_INW(HFA384X_CMD_OFF);
  		prism2_io_debug_error(dev, 2);
  		printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
  		       "reg=0x%04x\n", dev->name, reg);
  		return -ETIMEDOUT;
  	}
  
  	/* write command */
  	spin_lock_irqsave(&local->cmdlock, flags);
  	HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
  	HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
  	HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
  	entry->issued = 1;
  	spin_unlock_irqrestore(&local->cmdlock, flags);
  
  	return 0;
  }
  
  
  /**
   * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
   * @dev: pointer to net_device
   * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
   * @param0: value for Param0 register
   * @param1: value for Param1 register (pointer; %NULL if not used)
   * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
   *
   * Issue given command (possibly after waiting in command queue) and sleep
   * until the command is completed (or timed out or interrupted). This can be
   * called only from user process context.
   */
  static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
  		       u16 *param1, u16 *resp0)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int err, res, issue, issued = 0;
  	unsigned long flags;
  	struct hostap_cmd_queue *entry;
  	DECLARE_WAITQUEUE(wait, current);
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
  		printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
  		       dev->name);
  		return -1;
  	}
  
  	if (signal_pending(current))
  		return -EINTR;
  
  	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
  	if (entry == NULL)
  		return -ENOMEM;
  
  	refcount_set(&entry->usecnt, 1);
  	entry->type = CMD_SLEEP;
  	entry->cmd = cmd;
  	entry->param0 = param0;
  	if (param1)
  		entry->param1 = *param1;
  	init_waitqueue_head(&entry->compl);
  
  	/* prepare to wait for command completion event, but do not sleep yet
  	 */
  	add_wait_queue(&entry->compl, &wait);
  	set_current_state(TASK_INTERRUPTIBLE);
  
  	spin_lock_irqsave(&local->cmdlock, flags);
  	issue = list_empty(&local->cmd_queue);
  	if (issue)
  		entry->issuing = 1;
  	list_add_tail(&entry->list, &local->cmd_queue);
  	local->cmd_queue_len++;
  	spin_unlock_irqrestore(&local->cmdlock, flags);
  
  	err = 0;
  	if (!issue)
  		goto wait_completion;
  
  	if (signal_pending(current))
  		err = -EINTR;
  
  	if (!err) {
  		if (hfa384x_cmd_issue(dev, entry))
  			err = -ETIMEDOUT;
  		else
  			issued = 1;
  	}
  
   wait_completion:
  	if (!err && entry->type != CMD_COMPLETED) {
  		/* sleep until command is completed or timed out */
  		res = schedule_timeout(2 * HZ);
  	} else
  		res = -1;
  
  	if (!err && signal_pending(current))
  		err = -EINTR;
  
  	if (err && issued) {
  		/* the command was issued, so a CmdCompl event should occur
  		 * soon; however, there's a pending signal and
  		 * schedule_timeout() would be interrupted; wait a short period
  		 * of time to avoid removing entry from the list before
  		 * CmdCompl event */
  		udelay(300);
  	}
  
  	set_current_state(TASK_RUNNING);
  	remove_wait_queue(&entry->compl, &wait);
  
  	/* If entry->list is still in the list, it must be removed
  	 * first and in this case prism2_cmd_ev() does not yet have
  	 * local reference to it, and the data can be kfree()'d
  	 * here. If the command completion event is still generated,
  	 * it will be assigned to next (possibly) pending command, but
  	 * the driver will reset the card anyway due to timeout
  	 *
  	 * If the entry is not in the list prism2_cmd_ev() has a local
  	 * reference to it, but keeps cmdlock as long as the data is
  	 * needed, so the data can be kfree()'d here. */
  
  	/* FIX: if the entry->list is in the list, it has not been completed
  	 * yet, so removing it here is somewhat wrong.. this could cause
  	 * references to freed memory and next list_del() causing NULL pointer
  	 * dereference.. it would probably be better to leave the entry in the
  	 * list and the list should be emptied during hw reset */
  
  	spin_lock_irqsave(&local->cmdlock, flags);
  	if (!list_empty(&entry->list)) {
  		printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
  		       "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
  		       entry->type, res);
  		list_del_init(&entry->list);
  		local->cmd_queue_len--;
  	}
  	spin_unlock_irqrestore(&local->cmdlock, flags);
  
  	if (err) {
  		printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
  		       dev->name, err);
  		res = err;
  		goto done;
  	}
  
  	if (entry->type != CMD_COMPLETED) {
  		u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
  		printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
  		       "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
  		       "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
  		       res, entry, entry->type, entry->cmd, entry->param0, reg,
  		       HFA384X_INW(HFA384X_INTEN_OFF));
  		if (reg & HFA384X_EV_CMD) {
  			/* Command completion event is pending, but the
  			 * interrupt was not delivered - probably an issue
  			 * with pcmcia-cs configuration. */
  			printk(KERN_WARNING "%s: interrupt delivery does not "
  			       "seem to work\n", dev->name);
  		}
  		prism2_io_debug_error(dev, 3);
  		res = -ETIMEDOUT;
  		goto done;
  	}
  
  	if (resp0 != NULL)
  		*resp0 = entry->resp0;
  #ifndef final_version
  	if (entry->res) {
  		printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
  		       "resp0=0x%04x\n",
  		       dev->name, cmd, entry->res, entry->resp0);
  	}
  #endif /* final_version */
  
  	res = entry->res;
   done:
  	hostap_cmd_queue_free(local, entry, 1);
  	return res;
  }
  
  
  /**
   * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
   * @dev: pointer to net_device
   * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
   * @param0: value for Param0 register
   * @callback: command completion callback function (%NULL = no callback)
   * @context: context data to be given to the callback function
   *
   * Issue given command (possibly after waiting in command queue) and use
   * callback function to indicate command completion. This can be called both
   * from user and interrupt context. The callback function will be called in
   * hardware IRQ context. It can be %NULL, when no function is called when
   * command is completed.
   */
  static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
  				void (*callback)(struct net_device *dev,
  						 long context, u16 resp0,
  						 u16 status),
  				long context)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int issue, ret;
  	unsigned long flags;
  	struct hostap_cmd_queue *entry;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
  		printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
  		       dev->name);
  		return -1;
  	}
  
  	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
  	if (entry == NULL)
  		return -ENOMEM;
  
  	refcount_set(&entry->usecnt, 1);
  	entry->type = CMD_CALLBACK;
  	entry->cmd = cmd;
  	entry->param0 = param0;
  	entry->callback = callback;
  	entry->context = context;
  
  	spin_lock_irqsave(&local->cmdlock, flags);
  	issue = list_empty(&local->cmd_queue);
  	if (issue)
  		entry->issuing = 1;
  	list_add_tail(&entry->list, &local->cmd_queue);
  	local->cmd_queue_len++;
  	spin_unlock_irqrestore(&local->cmdlock, flags);
  
  	if (issue && hfa384x_cmd_issue(dev, entry))
  		ret = -ETIMEDOUT;
  	else
  		ret = 0;
  
  	hostap_cmd_queue_free(local, entry, ret);
  
  	return ret;
  }
  
  
  /**
   * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
   * @dev: pointer to net_device
   * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
   * @param0: value for Param0 register
   * @io_debug_num: I/O debug error number
   *
   * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
   */
  static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
  				 int io_debug_num)
  {
  	int tries;
  	u16 reg;
  
  	/* wait until busy bit is clear; this should always be clear since the
  	 * commands are serialized */
  	tries = HFA384X_CMD_BUSY_TIMEOUT;
  	while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
  		tries--;
  		udelay(1);
  	}
  	if (tries == 0) {
  		reg = HFA384X_INW(HFA384X_CMD_OFF);
  		prism2_io_debug_error(dev, io_debug_num);
  		printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
  		       "reg=0x%04x\n", dev->name, io_debug_num, reg);
  		return -ETIMEDOUT;
  	}
  
  	/* write command */
  	HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
  	HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
  
  	return 0;
  }
  
  
  /**
   * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
   * @dev: pointer to net_device
   * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
   * @param0: value for Param0 register
   */
  static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
  {
  	int res, tries;
  	u16 reg;
  
  	res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
  	if (res)
  		return res;
  
          /* wait for command completion */
  	if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
  		tries = HFA384X_DL_COMPL_TIMEOUT;
  	else
  		tries = HFA384X_CMD_COMPL_TIMEOUT;
  
          while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
                 tries > 0) {
                  tries--;
                  udelay(10);
          }
          if (tries == 0) {
                  reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
  		prism2_io_debug_error(dev, 5);
                  printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
  		       "reg=0x%04x\n", dev->name, reg);
                  return -ETIMEDOUT;
          }
  
          res = (HFA384X_INW(HFA384X_STATUS_OFF) &
                 (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
                  BIT(8))) >> 8;
  #ifndef final_version
  	if (res) {
  		printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
  		       dev->name, cmd, res);
  	}
  #endif
  
  	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
  
  	return res;
  }
  
  
  /**
   * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
   * @dev: pointer to net_device
   * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
   * @param0: value for Param0 register
   */
  static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
  				      u16 param0)
  {
  	return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
  }
  
  
  /**
   * prism2_cmd_ev - Prism2 command completion event handler
   * @dev: pointer to net_device
   *
   * Interrupt handler for command completion events. Called by the main
   * interrupt handler in hardware IRQ context. Read Resp0 and status registers
   * from the hardware and ACK the event. Depending on the issued command type
   * either wake up the sleeping process that is waiting for command completion
   * or call the callback function. Issue the next command, if one is pending.
   */
  static void prism2_cmd_ev(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	struct hostap_cmd_queue *entry = NULL;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	spin_lock(&local->cmdlock);
  	if (!list_empty(&local->cmd_queue)) {
  		entry = list_entry(local->cmd_queue.next,
  				   struct hostap_cmd_queue, list);
  		refcount_inc(&entry->usecnt);
  		list_del_init(&entry->list);
  		local->cmd_queue_len--;
  
  		if (!entry->issued) {
  			printk(KERN_DEBUG "%s: Command completion event, but "
  			       "cmd not issued\n", dev->name);
  			__hostap_cmd_queue_free(local, entry, 1);
  			entry = NULL;
  		}
  	}
  	spin_unlock(&local->cmdlock);
  
  	if (!entry) {
  		HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
  		printk(KERN_DEBUG "%s: Command completion event, but no "
  		       "pending commands\n", dev->name);
  		return;
  	}
  
  	entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
  	entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
  		      (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
  		       BIT(9) | BIT(8))) >> 8;
  	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
  
  	/* TODO: rest of the CmdEv handling could be moved to tasklet */
  	if (entry->type == CMD_SLEEP) {
  		entry->type = CMD_COMPLETED;
  		wake_up_interruptible(&entry->compl);
  	} else if (entry->type == CMD_CALLBACK) {
  		if (entry->callback)
  			entry->callback(dev, entry->context, entry->resp0,
  					entry->res);
  	} else {
  		printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
  		       dev->name, entry->type);
  	}
  	hostap_cmd_queue_free(local, entry, 1);
  
  	/* issue next command, if pending */
  	entry = NULL;
  	spin_lock(&local->cmdlock);
  	if (!list_empty(&local->cmd_queue)) {
  		entry = list_entry(local->cmd_queue.next,
  				   struct hostap_cmd_queue, list);
  		if (entry->issuing) {
  			/* hfa384x_cmd() has already started issuing this
  			 * command, so do not start here */
  			entry = NULL;
  		}
  		if (entry)
  			refcount_inc(&entry->usecnt);
  	}
  	spin_unlock(&local->cmdlock);
  
  	if (entry) {
  		/* issue next command; if command issuing fails, remove the
  		 * entry from cmd_queue */
  		int res = hfa384x_cmd_issue(dev, entry);
  		spin_lock(&local->cmdlock);
  		__hostap_cmd_queue_free(local, entry, res);
  		spin_unlock(&local->cmdlock);
  	}
  }
  
  
  static int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
  {
  	int tries = HFA384X_BAP_BUSY_TIMEOUT;
  	int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
  
  	while (res && tries > 0) {
  		tries--;
  		udelay(1);
  		res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
  	}
  	return res;
  }
  
  
  /* Offset must be even */
  static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
  			     int offset)
  {
  	u16 o_off, s_off;
  	int ret = 0;
  
  	if (offset % 2 || bap > 1)
  		return -EINVAL;
  
  	if (bap == BAP1) {
  		o_off = HFA384X_OFFSET1_OFF;
  		s_off = HFA384X_SELECT1_OFF;
  	} else {
  		o_off = HFA384X_OFFSET0_OFF;
  		s_off = HFA384X_SELECT0_OFF;
  	}
  
  	if (hfa384x_wait_offset(dev, o_off)) {
  		prism2_io_debug_error(dev, 7);
  		printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
  		       dev->name);
  		ret = -ETIMEDOUT;
  		goto out;
  	}
  
  	HFA384X_OUTW(id, s_off);
  	HFA384X_OUTW(offset, o_off);
  
  	if (hfa384x_wait_offset(dev, o_off)) {
  		prism2_io_debug_error(dev, 8);
  		printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
  		       dev->name);
  		ret = -ETIMEDOUT;
  		goto out;
  	}
  #ifndef final_version
  	if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
  		prism2_io_debug_error(dev, 9);
  		printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
  		       "(%d,0x04%x,%d); reg=0x%04x\n",
  		       dev->name, bap, id, offset, HFA384X_INW(o_off));
  		ret = -EINVAL;
  	}
  #endif
  
   out:
  	return ret;
  }
  
  
  static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
  			   int exact_len)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int res, rlen = 0;
  	struct hfa384x_rid_hdr rec;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->no_pri) {
  		printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
  		       "f/w\n", dev->name, rid, len);
  		return -ENOTTY; /* Well.. not really correct, but return
  				 * something unique enough.. */
  	}
  
  	if ((local->func->card_present && !local->func->card_present(local)) ||
  	    local->hw_downloading)
  		return -ENODEV;
  
  	res = mutex_lock_interruptible(&local->rid_bap_mtx);
  	if (res)
  		return res;
  
  	res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
  	if (res) {
  		printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
  		       "(res=%d, rid=%04x, len=%d)\n",
  		       dev->name, res, rid, len);
  		mutex_unlock(&local->rid_bap_mtx);
  		return res;
  	}
  
  	spin_lock_bh(&local->baplock);
  
  	res = hfa384x_setup_bap(dev, BAP0, rid, 0);
  	if (res)
  		goto unlock;
  
  	res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
  	if (res)
  		goto unlock;
  
  	if (le16_to_cpu(rec.len) == 0) {
  		/* RID not available */
  		res = -ENODATA;
  		goto unlock;
  	}
  
  	rlen = (le16_to_cpu(rec.len) - 1) * 2;
  	if (exact_len && rlen != len) {
  		printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
  		       "rid=0x%04x, len=%d (expected %d)\n",
  		       dev->name, rid, rlen, len);
  		res = -ENODATA;
  	}
  
  	res = hfa384x_from_bap(dev, BAP0, buf, len);
  
  unlock:
  	spin_unlock_bh(&local->baplock);
  	mutex_unlock(&local->rid_bap_mtx);
  
  	if (res) {
  		if (res != -ENODATA)
  			printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
  			       "len=%d) - failed - res=%d\n", dev->name, rid,
  			       len, res);
  		if (res == -ETIMEDOUT)
  			prism2_hw_reset(dev);
  		return res;
  	}
  
  	return rlen;
  }
  
  
  static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	struct hfa384x_rid_hdr rec;
  	int res;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->no_pri) {
  		printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
  		       "f/w\n", dev->name, rid, len);
  		return -ENOTTY; /* Well.. not really correct, but return
  				 * something unique enough.. */
  	}
  
  	if ((local->func->card_present && !local->func->card_present(local)) ||
  	    local->hw_downloading)
  		return -ENODEV;
  
  	rec.rid = cpu_to_le16(rid);
  	/* RID len in words and +1 for rec.rid */
  	rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
  
  	res = mutex_lock_interruptible(&local->rid_bap_mtx);
  	if (res)
  		return res;
  
  	spin_lock_bh(&local->baplock);
  	res = hfa384x_setup_bap(dev, BAP0, rid, 0);
  	if (!res)
  		res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
  	if (!res)
  		res = hfa384x_to_bap(dev, BAP0, buf, len);
  	spin_unlock_bh(&local->baplock);
  
  	if (res) {
  		printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
  		       "failed - res=%d\n", dev->name, rid, len, res);
  		mutex_unlock(&local->rid_bap_mtx);
  		return res;
  	}
  
  	res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
  	mutex_unlock(&local->rid_bap_mtx);
  
  	if (res) {
  		printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
  		       "failed (res=%d, rid=%04x, len=%d)\n",
  		       dev->name, res, rid, len);
  
  		if (res == -ETIMEDOUT)
  			prism2_hw_reset(dev);
  	}
  
  	return res;
  }
  
  
  static void hfa384x_disable_interrupts(struct net_device *dev)
  {
  	/* disable interrupts and clear event status */
  	HFA384X_OUTW(0, HFA384X_INTEN_OFF);
  	HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
  }
  
  
  static void hfa384x_enable_interrupts(struct net_device *dev)
  {
  	/* ack pending events and enable interrupts from selected events */
  	HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
  	HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
  }
  
  
  static void hfa384x_events_no_bap0(struct net_device *dev)
  {
  	HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
  		     HFA384X_INTEN_OFF);
  }
  
  
  static void hfa384x_events_all(struct net_device *dev)
  {
  	HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
  }
  
  
  static void hfa384x_events_only_cmd(struct net_device *dev)
  {
  	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
  }
  
  
  static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
  {
  	u16 fid;
  	unsigned long delay;
  
  	/* FIX: this could be replace with hfa384x_cmd() if the Alloc event
  	 * below would be handled like CmdCompl event (sleep here, wake up from
  	 * interrupt handler */
  	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
  		printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
  		       dev->name, len);
  		return 0xffff;
  	}
  
  	delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
  	while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
  	       time_before(jiffies, delay))
  		yield();
  	if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
  		printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
  		return 0xffff;
  	}
  
  	fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
  	HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
  
  	return fid;
  }
  
  
  static int prism2_reset_port(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int res;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (!local->dev_enabled)
  		return 0;
  
  	res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
  			  NULL, NULL);
  	if (res)
  		printk(KERN_DEBUG "%s: reset port failed to disable port\n",
  		       dev->name);
  	else {
  		res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
  				  NULL, NULL);
  		if (res)
  			printk(KERN_DEBUG "%s: reset port failed to enable "
  			       "port\n", dev->name);
  	}
  
  	/* It looks like at least some STA firmware versions reset
  	 * fragmentation threshold back to 2346 after enable command. Restore
  	 * the configured value, if it differs from this default. */
  	if (local->fragm_threshold != 2346 &&
  	    hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
  			    local->fragm_threshold)) {
  		printk(KERN_DEBUG "%s: failed to restore fragmentation "
  		       "threshold (%d) after Port0 enable\n",
  		       dev->name, local->fragm_threshold);
  	}
  
  	/* Some firmwares lose antenna selection settings on reset */
  	(void) hostap_set_antsel(local);
  
  	return res;
  }
  
  
  static int prism2_get_version_info(struct net_device *dev, u16 rid,
  				   const char *txt)
  {
  	struct hfa384x_comp_ident comp;
  	struct hostap_interface *iface;
  	local_info_t *local;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->no_pri) {
  		/* PRI f/w not yet available - cannot read RIDs */
  		return -1;
  	}
  	if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
  		printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
  		return -1;
  	}
  
  	printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
  	       __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
  	       __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
  	return 0;
  }
  
  
  static int prism2_setup_rids(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	__le16 tmp;
  	int ret = 0;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
  
  	if (!local->fw_ap) {
  		u16 tmp1 = hostap_get_porttype(local);
  		ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1);
  		if (ret) {
  			printk("%s: Port type setting to %d failed\n",
  			       dev->name, tmp1);
  			goto fail;
  		}
  	}
  
  	/* Setting SSID to empty string seems to kill the card in Host AP mode
  	 */
  	if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
  		ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
  					local->essid);
  		if (ret) {
  			printk("%s: AP own SSID setting failed\n", dev->name);
  			goto fail;
  		}
  	}
  
  	ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
  			      PRISM2_DATA_MAXLEN);
  	if (ret) {
  		printk("%s: MAC data length setting to %d failed\n",
  		       dev->name, PRISM2_DATA_MAXLEN);
  		goto fail;
  	}
  
  	if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
  		printk("%s: Channel list read failed\n", dev->name);
  		ret = -EINVAL;
  		goto fail;
  	}
  	local->channel_mask = le16_to_cpu(tmp);
  
  	if (local->channel < 1 || local->channel > 14 ||
  	    !(local->channel_mask & (1 << (local->channel - 1)))) {
  		printk(KERN_WARNING "%s: Channel setting out of range "
  		       "(%d)!\n", dev->name, local->channel);
  		ret = -EBUSY;
  		goto fail;
  	}
  
  	ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
  	if (ret) {
  		printk("%s: Channel setting to %d failed\n",
  		       dev->name, local->channel);
  		goto fail;
  	}
  
  	ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
  			      local->beacon_int);
  	if (ret) {
  		printk("%s: Beacon interval setting to %d failed\n",
  		       dev->name, local->beacon_int);
  		/* this may fail with Symbol/Lucent firmware */
  		if (ret == -ETIMEDOUT)
  			goto fail;
  	}
  
  	ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
  			      local->dtim_period);
  	if (ret) {
  		printk("%s: DTIM period setting to %d failed\n",
  		       dev->name, local->dtim_period);
  		/* this may fail with Symbol/Lucent firmware */
  		if (ret == -ETIMEDOUT)
  			goto fail;
  	}
  
  	ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
  			      local->is_promisc);
  	if (ret)
  		printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
  		       dev->name, local->is_promisc);
  
  	if (!local->fw_ap) {
  		ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
  					local->essid);
  		if (ret) {
  			printk("%s: Desired SSID setting failed\n", dev->name);
  			goto fail;
  		}
  	}
  
  	/* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
  	 * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
  	 * rates */
  	if (local->tx_rate_control == 0) {
  		local->tx_rate_control =
  			HFA384X_RATES_1MBPS |
  			HFA384X_RATES_2MBPS |
  			HFA384X_RATES_5MBPS |
  			HFA384X_RATES_11MBPS;
  	}
  	if (local->basic_rates == 0)
  		local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
  
  	if (!local->fw_ap) {
  		ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
  				      local->tx_rate_control);
  		if (ret) {
  			printk("%s: TXRateControl setting to %d failed\n",
  			       dev->name, local->tx_rate_control);
  			goto fail;
  		}
  
  		ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
  				      local->tx_rate_control);
  		if (ret) {
  			printk("%s: cnfSupportedRates setting to %d failed\n",
  			       dev->name, local->tx_rate_control);
  		}
  
  		ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
  				      local->basic_rates);
  		if (ret) {
  			printk("%s: cnfBasicRates setting to %d failed\n",
  			       dev->name, local->basic_rates);
  		}
  
  		ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
  		if (ret) {
  			printk("%s: Create IBSS setting to 1 failed\n",
  			       dev->name);
  		}
  	}
  
  	if (local->name_set)
  		(void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
  					 local->name);
  
  	if (hostap_set_encryption(local)) {
  		printk(KERN_INFO "%s: could not configure encryption\n",
  		       dev->name);
  	}
  
  	(void) hostap_set_antsel(local);
  
  	if (hostap_set_roaming(local)) {
  		printk(KERN_INFO "%s: could not set host roaming\n",
  		       dev->name);
  	}
  
  	if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
  	    hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
  		printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
  		       dev->name, local->enh_sec);
  
  	/* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
  	 * not working correctly (last seven counters report bogus values).
  	 * This has been fixed in 0.8.2, so enable 32-bit tallies only
  	 * beginning with that firmware version. Another bug fix for 32-bit
  	 * tallies in 1.4.0; should 16-bit tallies be used for some other
  	 * versions, too? */
  	if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
  		if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
  			printk(KERN_INFO "%s: cnfThirty2Tally setting "
  			       "failed\n", dev->name);
  			local->tallies32 = 0;
  		} else
  			local->tallies32 = 1;
  	} else
  		local->tallies32 = 0;
  
  	hostap_set_auth_algs(local);
  
  	if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
  			    local->fragm_threshold)) {
  		printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
  		       "failed\n", dev->name, local->fragm_threshold);
  	}
  
  	if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
  			    local->rts_threshold)) {
  		printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
  		       dev->name, local->rts_threshold);
  	}
  
  	if (local->manual_retry_count >= 0 &&
  	    hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
  			    local->manual_retry_count)) {
  		printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
  		       dev->name, local->manual_retry_count);
  	}
  
  	if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
  	    hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
  		local->rssi_to_dBm = le16_to_cpu(tmp);
  	}
  
  	if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
  	    hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
  		printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
  		       dev->name);
  	}
  
  	if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
  	    hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
  			    local->generic_elem, local->generic_elem_len)) {
  		printk(KERN_INFO "%s: setting genericElement failed\n",
  		       dev->name);
  	}
  
   fail:
  	return ret;
  }
  
  
  static int prism2_hw_init(struct net_device *dev, int initial)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int ret, first = 1;
  	unsigned long start, delay;
  
  	PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
  
   init:
  	/* initialize HFA 384x */
  	ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
  	if (ret) {
  		printk(KERN_INFO "%s: first command failed - assuming card "
  		       "does not have primary firmware\n", dev_info);
  	}
  
  	if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
  		/* EvStat has Cmd bit set in some cases, so retry once if no
  		 * wait was needed */
  		HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
  		printk(KERN_DEBUG "%s: init command completed too quickly - "
  		       "retrying\n", dev->name);
  		first = 0;
  		goto init;
  	}
  
  	start = jiffies;
  	delay = jiffies + HFA384X_INIT_TIMEOUT;
  	while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
  	       time_before(jiffies, delay))
  		yield();
  	if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
  		printk(KERN_DEBUG "%s: assuming no Primary image in "
  		       "flash - card initialization not completed\n",
  		       dev_info);
  		local->no_pri = 1;
  #ifdef PRISM2_DOWNLOAD_SUPPORT
  			if (local->sram_type == -1)
  				local->sram_type = prism2_get_ram_size(local);
  #endif /* PRISM2_DOWNLOAD_SUPPORT */
  		return 1;
  	}
  	local->no_pri = 0;
  	printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
  	       (jiffies - start) * 1000 / HZ);
  	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
  	return 0;
  }
  
  
  static int prism2_hw_init2(struct net_device *dev, int initial)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int i;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  #ifdef PRISM2_DOWNLOAD_SUPPORT
  	kfree(local->pda);
  	if (local->no_pri)
  		local->pda = NULL;
  	else
  		local->pda = prism2_read_pda(dev);
  #endif /* PRISM2_DOWNLOAD_SUPPORT */
  
  	hfa384x_disable_interrupts(dev);
  
  #ifndef final_version
  	HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
  	if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
  		printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
  		       HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
  		goto failed;
  	}
  #endif
  
  	if (initial || local->pri_only) {
  		hfa384x_events_only_cmd(dev);
  		/* get card version information */
  		if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
  		    prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
  			hfa384x_disable_interrupts(dev);
  			goto failed;
  		}
  
  		if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
  			printk(KERN_DEBUG "%s: Failed to read STA f/w version "
  			       "- only Primary f/w present\n", dev->name);
  			local->pri_only = 1;
  			return 0;
  		}
  		local->pri_only = 0;
  		hfa384x_disable_interrupts(dev);
  	}
  
  	/* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
  	 * enable interrupts before this. This would also require some sort of
  	 * sleeping AllocEv waiting */
  
  	/* allocate TX FIDs */
  	local->txfid_len = PRISM2_TXFID_LEN;
  	for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
  		local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
  		if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
  			local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
  			if (local->txfid[i] != 0xffff) {
  				printk(KERN_DEBUG "%s: Using shorter TX FID "
  				       "(1600 bytes)\n", dev->name);
  				local->txfid_len = 1600;
  			}
  		}
  		if (local->txfid[i] == 0xffff)
  			goto failed;
  		local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
  	}
  
  	hfa384x_events_only_cmd(dev);
  
  	if (initial) {
  		u8 addr[ETH_ALEN] = {};
  		struct list_head *ptr;
  
  		prism2_check_sta_fw_version(local);
  
  		if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
  				    addr, ETH_ALEN, 1) < 0) {
  			printk("%s: could not get own MAC address\n",
  			       dev->name);
  		}
  		eth_hw_addr_set(dev, addr);
  		list_for_each(ptr, &local->hostap_interfaces) {
  			iface = list_entry(ptr, struct hostap_interface, list);
  			eth_hw_addr_inherit(iface->dev, dev);
  		}
  	} else if (local->fw_ap)
  		prism2_check_sta_fw_version(local);
  
  	prism2_setup_rids(dev);
  
  	/* MAC is now configured, but port 0 is not yet enabled */
  	return 0;
  
   failed:
  	if (!local->no_pri)
  		printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
  	return 1;
  }
  
  
  static int prism2_hw_enable(struct net_device *dev, int initial)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int was_resetting;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  	was_resetting = local->hw_resetting;
  
  	if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
  		printk("%s: MAC port 0 enabling failed\n", dev->name);
  		return 1;
  	}
  
  	local->hw_ready = 1;
  	local->hw_reset_tries = 0;
  	local->hw_resetting = 0;
  	hfa384x_enable_interrupts(dev);
  
  	/* at least D-Link DWL-650 seems to require additional port reset
  	 * before it starts acting as an AP, so reset port automatically
  	 * here just in case */
  	if (initial && prism2_reset_port(dev)) {
  		printk("%s: MAC port 0 resetting failed\n", dev->name);
  		return 1;
  	}
  
  	if (was_resetting && netif_queue_stopped(dev)) {
  		/* If hw_reset() was called during pending transmit, netif
  		 * queue was stopped. Wake it up now since the wlan card has
  		 * been resetted. */
  		netif_wake_queue(dev);
  	}
  
  	return 0;
  }
  
  
  static int prism2_hw_config(struct net_device *dev, int initial)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->hw_downloading)
  		return 1;
  
  	if (prism2_hw_init(dev, initial)) {
  		return local->no_pri ? 0 : 1;
  	}
  
  	if (prism2_hw_init2(dev, initial))
  		return 1;
  
  	/* Enable firmware if secondary image is loaded and at least one of the
  	 * netdevices is up. */
  	if (!local->pri_only &&
  	    (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
  		if (!local->dev_enabled)
  			prism2_callback(local, PRISM2_CALLBACK_ENABLE);
  		local->dev_enabled = 1;
  		return prism2_hw_enable(dev, initial);
  	}
  
  	return 0;
  }
  
  
  static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	/* Allow only command completion events during disable */
  	hfa384x_events_only_cmd(dev);
  
  	local->hw_ready = 0;
  	if (local->dev_enabled)
  		prism2_callback(local, PRISM2_CALLBACK_DISABLE);
  	local->dev_enabled = 0;
  
  	if (local->func->card_present && !local->func->card_present(local)) {
  		printk(KERN_DEBUG "%s: card already removed or not configured "
  		       "during shutdown\n", dev->name);
  		return;
  	}
  
  	if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
  	    hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
  		printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
  
  	hfa384x_disable_interrupts(dev);
  
  	if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
  		hfa384x_events_only_cmd(dev);
  	else
  		prism2_clear_cmd_queue(local);
  }
  
  
  static void prism2_hw_reset(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  
  #if 0
  	static long last_reset = 0;
  
  	/* do not reset card more than once per second to avoid ending up in a
  	 * busy loop resetting the card */
  	if (time_before_eq(jiffies, last_reset + HZ))
  		return;
  	last_reset = jiffies;
  #endif
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (local->hw_downloading)
  		return;
  
  	if (local->hw_resetting) {
  		printk(KERN_WARNING "%s: %s: already resetting card - "
  		       "ignoring reset request\n", dev_info, dev->name);
  		return;
  	}
  
  	local->hw_reset_tries++;
  	if (local->hw_reset_tries > 10) {
  		printk(KERN_WARNING "%s: too many reset tries, skipping\n",
  		       dev->name);
  		return;
  	}
  
  	printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
  	hfa384x_disable_interrupts(dev);
  	local->hw_resetting = 1;
  	if (local->func->cor_sreset) {
  		/* Host system seems to hang in some cases with high traffic
  		 * load or shared interrupts during COR sreset. Disable shared
  		 * interrupts during reset to avoid these crashes. COS sreset
  		 * takes quite a long time, so it is unfortunate that this
  		 * seems to be needed. Anyway, I do not know of any better way
  		 * of avoiding the crash. */
  		disable_irq(dev->irq);
  		local->func->cor_sreset(local);
  		enable_irq(dev->irq);
  	}
  	prism2_hw_shutdown(dev, 1);
  	prism2_hw_config(dev, 0);
  	local->hw_resetting = 0;
  
  #ifdef PRISM2_DOWNLOAD_SUPPORT
  	if (local->dl_pri) {
  		printk(KERN_DEBUG "%s: persistent download of primary "
  		       "firmware\n", dev->name);
  		if (prism2_download_genesis(local, local->dl_pri) < 0)
  			printk(KERN_WARNING "%s: download (PRI) failed\n",
  			       dev->name);
  	}
  
  	if (local->dl_sec) {
  		printk(KERN_DEBUG "%s: persistent download of secondary "
  		       "firmware\n", dev->name);
  		if (prism2_download_volatile(local, local->dl_sec) < 0)
  			printk(KERN_WARNING "%s: download (SEC) failed\n",
  			       dev->name);
  	}
  #endif /* PRISM2_DOWNLOAD_SUPPORT */
  
  	/* TODO: restore beacon TIM bits for STAs that have buffered frames */
  }
  
  
  static void prism2_schedule_reset(local_info_t *local)
  {
  	schedule_work(&local->reset_queue);
  }
  
  
  /* Called only as scheduled task after noticing card timeout in interrupt
   * context */
  static void handle_reset_queue(struct work_struct *work)
  {
  	local_info_t *local = container_of(work, local_info_t, reset_queue);
  
  	printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
  	prism2_hw_reset(local->dev);
  
  	if (netif_queue_stopped(local->dev)) {
  		int i;
  
  		for (i = 0; i < PRISM2_TXFID_COUNT; i++)
  			if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
  				PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
  				       "wake up queue\n");
  				netif_wake_queue(local->dev);
  				break;
  			}
  	}
  }
  
  
  static int prism2_get_txfid_idx(local_info_t *local)
  {
  	int idx, end;
  	unsigned long flags;
  
  	spin_lock_irqsave(&local->txfidlock, flags);
  	end = idx = local->next_txfid;
  	do {
  		if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
  			local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
  			spin_unlock_irqrestore(&local->txfidlock, flags);
  			return idx;
  		}
  		idx++;
  		if (idx >= PRISM2_TXFID_COUNT)
  			idx = 0;
  	} while (idx != end);
  	spin_unlock_irqrestore(&local->txfidlock, flags);
  
  	PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
  	       "packet dropped\n");
  	local->dev->stats.tx_dropped++;
  
  	return -1;
  }
  
  
  /* Called only from hardware IRQ */
  static void prism2_transmit_cb(struct net_device *dev, long context,
  			       u16 resp0, u16 res)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int idx = (int) context;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (res) {
  		printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
  		       dev->name, res);
  		return;
  	}
  
  	if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
  		printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
  		       "idx=%d\n", dev->name, idx);
  		return;
  	}
  
  	if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
  		printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
  		       "with no pending transmit\n", dev->name);
  	}
  
  	if (netif_queue_stopped(dev)) {
  		/* ready for next TX, so wake up queue that was stopped in
  		 * prism2_transmit() */
  		netif_wake_queue(dev);
  	}
  
  	spin_lock(&local->txfidlock);
  
  	/* With reclaim, Resp0 contains new txfid for transmit; the old txfid
  	 * will be automatically allocated for the next TX frame */
  	local->intransmitfid[idx] = resp0;
  
  	PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
  	       "resp0=0x%04x, transmit_txfid=0x%04x\n",
  	       dev->name, idx, local->txfid[idx],
  	       resp0, local->intransmitfid[local->next_txfid]);
  
  	idx++;
  	if (idx >= PRISM2_TXFID_COUNT)
  		idx = 0;
  	local->next_txfid = idx;
  
  	/* check if all TX buffers are occupied */
  	do {
  		if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
  			spin_unlock(&local->txfidlock);
  			return;
  		}
  		idx++;
  		if (idx >= PRISM2_TXFID_COUNT)
  			idx = 0;
  	} while (idx != local->next_txfid);
  	spin_unlock(&local->txfidlock);
  
  	/* no empty TX buffers, stop queue */
  	netif_stop_queue(dev);
  }
  
  
  /* Called only from software IRQ if PCI bus master is not used (with bus master
   * this can be called both from software and hardware IRQ) */
  static int prism2_transmit(struct net_device *dev, int idx)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int res;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	/* The driver tries to stop netif queue so that there would not be
  	 * more than one attempt to transmit frames going on; check that this
  	 * is really the case */
  
  	if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
  		printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
  		       "when previous TX was pending\n", dev->name);
  		return -1;
  	}
  
  	/* stop the queue for the time that transmit is pending */
  	netif_stop_queue(dev);
  
  	/* transmit packet */
  	res = hfa384x_cmd_callback(
  		dev,
  		HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
  		local->txfid[idx],
  		prism2_transmit_cb, (long) idx);
  
  	if (res) {
  		printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
  		       "failed (res=%d)\n", dev->name, res);
  		dev->stats.tx_dropped++;
  		netif_wake_queue(dev);
  		return -1;
  	}
  	netif_trans_update(dev);
  
  	/* Since we did not wait for command completion, the card continues
  	 * to process on the background and we will finish handling when
  	 * command completion event is handled (prism2_cmd_ev() function) */
  
  	return 0;
  }
  
  
  /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
   * send the payload with this descriptor) */
  /* Called only from software IRQ */
  static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	struct hfa384x_tx_frame txdesc;
  	struct hostap_skb_tx_data *meta;
  	int hdr_len, data_len, idx, res, ret = -1;
  	u16 tx_control;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	meta = (struct hostap_skb_tx_data *) skb->cb;
  
  	prism2_callback(local, PRISM2_CALLBACK_TX_START);
  
  	if ((local->func->card_present && !local->func->card_present(local)) ||
  	    !local->hw_ready || local->hw_downloading || local->pri_only) {
  		if (net_ratelimit()) {
  			printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
  			       " skipping\n", dev->name);
  		}
  		goto fail;
  	}
  
  	memset(&txdesc, 0, sizeof(txdesc));
  
  	/* skb->data starts with txdesc->frame_control */
  	hdr_len = sizeof(txdesc.header);
  	BUILD_BUG_ON(hdr_len != 24);
  	skb_copy_from_linear_data(skb, &txdesc.header, hdr_len);
  	if (ieee80211_is_data(txdesc.frame_control) &&
  	    ieee80211_has_a4(txdesc.frame_control) &&
  	    skb->len >= 30) {
  		/* Addr4 */
  		skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4,
  						 ETH_ALEN);
  		hdr_len += ETH_ALEN;
  	}
  
  	tx_control = local->tx_control;
  	if (meta->tx_cb_idx) {
  		tx_control |= HFA384X_TX_CTRL_TX_OK;
  		txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx);
  	}
  	txdesc.tx_control = cpu_to_le16(tx_control);
  	txdesc.tx_rate = meta->rate;
  
  	data_len = skb->len - hdr_len;
  	txdesc.data_len = cpu_to_le16(data_len);
  	txdesc.len = cpu_to_be16(data_len);
  
  	idx = prism2_get_txfid_idx(local);
  	if (idx < 0)
  		goto fail;
  
  	if (local->frame_dump & PRISM2_DUMP_TX_HDR)
  		hostap_dump_tx_header(dev->name, &txdesc);
  
  	spin_lock(&local->baplock);
  	res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
  
  	if (!res)
  		res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
  	if (!res)
  		res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
  				     skb->len - hdr_len);
  	spin_unlock(&local->baplock);
  
  	if (!res)
  		res = prism2_transmit(dev, idx);
  	if (res) {
  		printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
  		       dev->name);
  		local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
  		schedule_work(&local->reset_queue);
  		goto fail;
  	}
  
  	ret = 0;
  
  fail:
  	prism2_callback(local, PRISM2_CALLBACK_TX_END);
  	return ret;
  }
  
  
  /* Some SMP systems have reported number of odd errors with hostap_pci. fid
   * register has changed values between consecutive reads for an unknown reason.
   * This should really not happen, so more debugging is needed. This test
   * version is a bit slower, but it will detect most of such register changes
   * and will try to get the correct fid eventually. */
  #define EXTRA_FID_READ_TESTS
  
  static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
  {
  #ifdef EXTRA_FID_READ_TESTS
  	u16 val, val2, val3;
  	int i;
  
  	for (i = 0; i < 10; i++) {
  		val = HFA384X_INW(reg);
  		val2 = HFA384X_INW(reg);
  		val3 = HFA384X_INW(reg);
  
  		if (val == val2 && val == val3)
  			return val;
  
  		printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
  		       " %04x %04x %04x\n",
  		       dev->name, i, reg, val, val2, val3);
  		if ((val == val2 || val == val3) && val != 0)
  			return val;
  		if (val2 == val3 && val2 != 0)
  			return val2;
  	}
  	printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
  	       "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
  	return val;
  #else /* EXTRA_FID_READ_TESTS */
  	return HFA384X_INW(reg);
  #endif /* EXTRA_FID_READ_TESTS */
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void prism2_rx(local_info_t *local)
  {
  	struct net_device *dev = local->dev;
  	int res, rx_pending = 0;
  	u16 len, hdr_len, rxfid, status, macport;
  	struct hfa384x_rx_frame rxdesc;
  	struct sk_buff *skb = NULL;
  
  	prism2_callback(local, PRISM2_CALLBACK_RX_START);
  
  	rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
  #ifndef final_version
  	if (rxfid == 0) {
  		rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
  		printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
  		       rxfid);
  		if (rxfid == 0) {
  			schedule_work(&local->reset_queue);
  			goto rx_dropped;
  		}
  		/* try to continue with the new rxfid value */
  	}
  #endif
  
  	spin_lock(&local->baplock);
  	res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
  	if (!res)
  		res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
  
  	if (res) {
  		spin_unlock(&local->baplock);
  		printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
  		       res);
  		if (res == -ETIMEDOUT) {
  			schedule_work(&local->reset_queue);
  		}
  		goto rx_dropped;
  	}
  
  	len = le16_to_cpu(rxdesc.data_len);
  	hdr_len = sizeof(rxdesc);
  	status = le16_to_cpu(rxdesc.status);
  	macport = (status >> 8) & 0x07;
  
  	/* Drop frames with too large reported payload length. Monitor mode
  	 * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
  	 * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
  	 * macport 7 */
  	if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
  		if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
  			if (len >= (u16) -14) {
  				hdr_len -= 65535 - len;
  				hdr_len--;
  			}
  			len = 0;
  		} else {
  			spin_unlock(&local->baplock);
  			printk(KERN_DEBUG "%s: Received frame with invalid "
  			       "length 0x%04x\n", dev->name, len);
  			hostap_dump_rx_header(dev->name, &rxdesc);
  			goto rx_dropped;
  		}
  	}
  
  	skb = dev_alloc_skb(len + hdr_len);
  	if (!skb) {
  		spin_unlock(&local->baplock);
  		printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
  		       dev->name);
  		goto rx_dropped;
  	}
  	skb->dev = dev;
  	skb_put_data(skb, &rxdesc, hdr_len);
  
  	if (len > 0)
  		res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len);
  	spin_unlock(&local->baplock);
  	if (res) {
  		printk(KERN_DEBUG "%s: RX failed to read "
  		       "frame data\n", dev->name);
  		goto rx_dropped;
  	}
  
  	skb_queue_tail(&local->rx_list, skb);
  	tasklet_schedule(&local->rx_tasklet);
  
   rx_exit:
  	prism2_callback(local, PRISM2_CALLBACK_RX_END);
  	if (!rx_pending) {
  		HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
  	}
  
  	return;
  
   rx_dropped:
  	dev->stats.rx_dropped++;
  	if (skb)
  		dev_kfree_skb(skb);
  	goto rx_exit;
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
  {
  	struct hfa384x_rx_frame *rxdesc;
  	struct net_device *dev = skb->dev;
  	struct hostap_80211_rx_status stats;
  	int hdrlen, rx_hdrlen;
  
  	rx_hdrlen = sizeof(*rxdesc);
  	if (skb->len < sizeof(*rxdesc)) {
  		/* Allow monitor mode to receive shorter frames */
  		if (local->iw_mode == IW_MODE_MONITOR &&
  		    skb->len >= sizeof(*rxdesc) - 30) {
  			rx_hdrlen = skb->len;
  		} else {
  			dev_kfree_skb(skb);
  			return;
  		}
  	}
  
  	rxdesc = (struct hfa384x_rx_frame *) skb->data;
  
  	if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
  	    skb->len >= sizeof(*rxdesc))
  		hostap_dump_rx_header(dev->name, rxdesc);
  
  	if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
  	    (!local->monitor_allow_fcserr ||
  	     local->iw_mode != IW_MODE_MONITOR))
  		goto drop;
  
  	if (skb->len > PRISM2_DATA_MAXLEN) {
  		printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
  		       dev->name, skb->len, PRISM2_DATA_MAXLEN);
  		goto drop;
  	}
  
  	stats.mac_time = le32_to_cpu(rxdesc->time);
  	stats.signal = rxdesc->signal - local->rssi_to_dBm;
  	stats.noise = rxdesc->silence - local->rssi_to_dBm;
  	stats.rate = rxdesc->rate;
  
  	/* Convert Prism2 RX structure into IEEE 802.11 header */
  	hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control);
  	if (hdrlen > rx_hdrlen)
  		hdrlen = rx_hdrlen;
  
  	memmove(skb_pull(skb, rx_hdrlen - hdrlen),
  		&rxdesc->frame_control, hdrlen);
  
  	hostap_80211_rx(dev, skb, &stats);
  	return;
  
   drop:
  	dev_kfree_skb(skb);
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void hostap_rx_tasklet(struct tasklet_struct *t)
  {
  	local_info_t *local = from_tasklet(local, t, rx_tasklet);
  	struct sk_buff *skb;
  
  	while ((skb = skb_dequeue(&local->rx_list)) != NULL)
  		hostap_rx_skb(local, skb);
  }
  
  
  /* Called only from hardware IRQ */
  static void prism2_alloc_ev(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int idx;
  	u16 fid;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
  
  	PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
  
  	spin_lock(&local->txfidlock);
  	idx = local->next_alloc;
  
  	do {
  		if (local->txfid[idx] == fid) {
  			PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
  			       idx);
  
  #ifndef final_version
  			if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
  				printk("Already released txfid found at idx "
  				       "%d\n", idx);
  			if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
  				printk("Already reserved txfid found at idx "
  				       "%d\n", idx);
  #endif
  			local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
  			idx++;
  			local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
  				idx;
  
  			if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
  			    netif_queue_stopped(dev))
  				netif_wake_queue(dev);
  
  			spin_unlock(&local->txfidlock);
  			return;
  		}
  
  		idx++;
  		if (idx >= PRISM2_TXFID_COUNT)
  			idx = 0;
  	} while (idx != local->next_alloc);
  
  	printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
  	       "read 0x%04x) for alloc event\n", dev->name, fid,
  	       HFA384X_INW(HFA384X_ALLOCFID_OFF));
  	printk(KERN_DEBUG "TXFIDs:");
  	for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
  		printk(" %04x[%04x]", local->txfid[idx],
  		       local->intransmitfid[idx]);
  	printk("\n");
  	spin_unlock(&local->txfidlock);
  
  	/* FIX: should probably schedule reset; reference to one txfid was lost
  	 * completely.. Bad things will happen if we run out of txfids
  	 * Actually, this will cause netdev watchdog to notice TX timeout and
  	 * then card reset after all txfids have been leaked. */
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void hostap_tx_callback(local_info_t *local,
  			       struct hfa384x_tx_frame *txdesc, int ok,
  			       char *payload)
  {
  	u16 sw_support, hdrlen, len;
  	struct sk_buff *skb;
  	struct hostap_tx_callback_info *cb;
  
  	/* Make sure that frame was from us. */
  	if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
  		printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
  		       local->dev->name);
  		return;
  	}
  
  	sw_support = le32_to_cpu(txdesc->sw_support);
  
  	spin_lock(&local->lock);
  	cb = local->tx_callback;
  	while (cb != NULL && cb->idx != sw_support)
  		cb = cb->next;
  	spin_unlock(&local->lock);
  
  	if (cb == NULL) {
  		printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
  		       local->dev->name, sw_support);
  		return;
  	}
  
  	hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
  	len = le16_to_cpu(txdesc->data_len);
  	skb = dev_alloc_skb(hdrlen + len);
  	if (skb == NULL) {
  		printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
  		       "skb\n", local->dev->name);
  		return;
  	}
  
  	skb_put_data(skb, (void *)&txdesc->frame_control, hdrlen);
  	if (payload)
  		skb_put_data(skb, payload, len);
  
  	skb->dev = local->dev;
  	skb_reset_mac_header(skb);
  
  	cb->func(skb, ok, cb->data);
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static int hostap_tx_compl_read(local_info_t *local, int error,
  				struct hfa384x_tx_frame *txdesc,
  				char **payload)
  {
  	u16 fid, len;
  	int res, ret = 0;
  	struct net_device *dev = local->dev;
  
  	fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
  
  	PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
  
  	spin_lock(&local->baplock);
  	res = hfa384x_setup_bap(dev, BAP0, fid, 0);
  	if (!res)
  		res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
  	if (res) {
  		PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
  		       "read txdesc\n", dev->name, error, fid);
  		if (res == -ETIMEDOUT) {
  			schedule_work(&local->reset_queue);
  		}
  		ret = -1;
  		goto fail;
  	}
  	if (txdesc->sw_support) {
  		len = le16_to_cpu(txdesc->data_len);
  		if (len < PRISM2_DATA_MAXLEN) {
  			*payload = kmalloc(len, GFP_ATOMIC);
  			if (*payload == NULL ||
  			    hfa384x_from_bap(dev, BAP0, *payload, len)) {
  				PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
  				       "frame payload\n", dev->name);
  				kfree(*payload);
  				*payload = NULL;
  				ret = -1;
  				goto fail;
  			}
  		}
  	}
  
   fail:
  	spin_unlock(&local->baplock);
  
  	return ret;
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void prism2_tx_ev(local_info_t *local)
  {
  	struct net_device *dev = local->dev;
  	char *payload = NULL;
  	struct hfa384x_tx_frame txdesc;
  
  	if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
  		goto fail;
  
  	if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
  		PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
  		       "retry_count=%d tx_rate=%d seq_ctrl=%d "
  		       "duration_id=%d\n",
  		       dev->name, le16_to_cpu(txdesc.status),
  		       txdesc.retry_count, txdesc.tx_rate,
  		       le16_to_cpu(txdesc.seq_ctrl),
  		       le16_to_cpu(txdesc.duration_id));
  	}
  
  	if (txdesc.sw_support)
  		hostap_tx_callback(local, &txdesc, 1, payload);
  	kfree(payload);
  
   fail:
  	HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void hostap_sta_tx_exc_tasklet(struct tasklet_struct *t)
  {
  	local_info_t *local = from_tasklet(local, t, sta_tx_exc_tasklet);
  	struct sk_buff *skb;
  
  	while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
  		struct hfa384x_tx_frame *txdesc =
  			(struct hfa384x_tx_frame *) skb->data;
  
  		if (skb->len >= sizeof(*txdesc)) {
  			/* Convert Prism2 RX structure into IEEE 802.11 header
  			 */
  			int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control);
  			memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
  				&txdesc->frame_control, hdrlen);
  
  			hostap_handle_sta_tx_exc(local, skb);
  		}
  		dev_kfree_skb(skb);
  	}
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void prism2_txexc(local_info_t *local)
  {
  	struct net_device *dev = local->dev;
  	u16 status, fc;
  	int show_dump, res;
  	char *payload = NULL;
  	struct hfa384x_tx_frame txdesc;
  
  	show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
  	dev->stats.tx_errors++;
  
  	res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
  	HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
  	if (res)
  		return;
  
  	status = le16_to_cpu(txdesc.status);
  
  	/* We produce a TXDROP event only for retry or lifetime
  	 * exceeded, because that's the only status that really mean
  	 * that this particular node went away.
  	 * Other errors means that *we* screwed up. - Jean II */
  	if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
  	{
  		union iwreq_data wrqu;
  
  		/* Copy 802.11 dest address. */
  		memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
  		wrqu.addr.sa_family = ARPHRD_ETHER;
  		wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
  	} else
  		show_dump = 1;
  
  	if (local->iw_mode == IW_MODE_MASTER ||
  	    local->iw_mode == IW_MODE_REPEAT ||
  	    local->wds_type & HOSTAP_WDS_AP_CLIENT) {
  		struct sk_buff *skb;
  		skb = dev_alloc_skb(sizeof(txdesc));
  		if (skb) {
  			skb_put_data(skb, &txdesc, sizeof(txdesc));
  			skb_queue_tail(&local->sta_tx_exc_list, skb);
  			tasklet_schedule(&local->sta_tx_exc_tasklet);
  		}
  	}
  
  	if (txdesc.sw_support)
  		hostap_tx_callback(local, &txdesc, 0, payload);
  	kfree(payload);
  
  	if (!show_dump)
  		return;
  
  	PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
  	       " tx_control=%04x\n",
  	       dev->name, status,
  	       status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
  	       status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
  	       status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
  	       status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
  	       le16_to_cpu(txdesc.tx_control));
  
  	fc = le16_to_cpu(txdesc.frame_control);
  	PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
  	       "(%s%s%s::%d%s%s)\n",
  	       txdesc.retry_count, txdesc.tx_rate, fc,
  	       ieee80211_is_mgmt(txdesc.frame_control) ? "Mgmt" : "",
  	       ieee80211_is_ctl(txdesc.frame_control) ? "Ctrl" : "",
  	       ieee80211_is_data(txdesc.frame_control) ? "Data" : "",
  	       (fc & IEEE80211_FCTL_STYPE) >> 4,
  	       ieee80211_has_tods(txdesc.frame_control) ? " ToDS" : "",
  	       ieee80211_has_fromds(txdesc.frame_control) ? " FromDS" : "");
  	PDEBUG(DEBUG_EXTRA, "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
  	       txdesc.addr1, txdesc.addr2,
  	       txdesc.addr3, txdesc.addr4);
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void hostap_info_tasklet(struct tasklet_struct *t)
  {
  	local_info_t *local = from_tasklet(local, t, info_tasklet);
  	struct sk_buff *skb;
  
  	while ((skb = skb_dequeue(&local->info_list)) != NULL) {
  		hostap_info_process(local, skb);
  		dev_kfree_skb(skb);
  	}
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void prism2_info(local_info_t *local)
  {
  	struct net_device *dev = local->dev;
  	u16 fid;
  	int res, left;
  	struct hfa384x_info_frame info;
  	struct sk_buff *skb;
  
  	fid = HFA384X_INW(HFA384X_INFOFID_OFF);
  
  	spin_lock(&local->baplock);
  	res = hfa384x_setup_bap(dev, BAP0, fid, 0);
  	if (!res)
  		res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
  	if (res) {
  		spin_unlock(&local->baplock);
  		printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
  		       fid);
  		if (res == -ETIMEDOUT) {
  			schedule_work(&local->reset_queue);
  		}
  		goto out;
  	}
  
  	left = (le16_to_cpu(info.len) - 1) * 2;
  
  	if (info.len & cpu_to_le16(0x8000) || info.len == 0 || left > 2060) {
  		/* data register seems to give 0x8000 in some error cases even
  		 * though busy bit is not set in offset register;
  		 * in addition, length must be at least 1 due to type field */
  		spin_unlock(&local->baplock);
  		printk(KERN_DEBUG "%s: Received info frame with invalid "
  		       "length 0x%04x (type 0x%04x)\n", dev->name,
  		       le16_to_cpu(info.len), le16_to_cpu(info.type));
  		goto out;
  	}
  
  	skb = dev_alloc_skb(sizeof(info) + left);
  	if (skb == NULL) {
  		spin_unlock(&local->baplock);
  		printk(KERN_DEBUG "%s: Could not allocate skb for info "
  		       "frame\n", dev->name);
  		goto out;
  	}
  
  	skb_put_data(skb, &info, sizeof(info));
  	if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
  	{
  		spin_unlock(&local->baplock);
  		printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
  		       "len=0x%04x, type=0x%04x\n", dev->name, fid,
  		       le16_to_cpu(info.len), le16_to_cpu(info.type));
  		dev_kfree_skb(skb);
  		goto out;
  	}
  	spin_unlock(&local->baplock);
  
  	skb_queue_tail(&local->info_list, skb);
  	tasklet_schedule(&local->info_tasklet);
  
   out:
  	HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
  }
  
  
  /* Called only as a tasklet (software IRQ) */
  static void hostap_bap_tasklet(struct tasklet_struct *t)
  {
  	local_info_t *local = from_tasklet(local, t, bap_tasklet);
  	struct net_device *dev = local->dev;
  	u16 ev;
  	int frames = 30;
  
  	if (local->func->card_present && !local->func->card_present(local))
  		return;
  
  	set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
  
  	/* Process all pending BAP events without generating new interrupts
  	 * for them */
  	while (frames-- > 0) {
  		ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
  		if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
  			break;
  		if (ev & HFA384X_EV_RX)
  			prism2_rx(local);
  		if (ev & HFA384X_EV_INFO)
  			prism2_info(local);
  		if (ev & HFA384X_EV_TX)
  			prism2_tx_ev(local);
  		if (ev & HFA384X_EV_TXEXC)
  			prism2_txexc(local);
  	}
  
  	set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
  	clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
  
  	/* Enable interrupts for new BAP events */
  	hfa384x_events_all(dev);
  	clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
  }
  
  
  /* Called only from hardware IRQ */
  static void prism2_infdrop(struct net_device *dev)
  {
  	static unsigned long last_inquire = 0;
  
  	PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
  
  	/* some firmware versions seem to get stuck with
  	 * full CommTallies in high traffic load cases; every
  	 * packet will then cause INFDROP event and CommTallies
  	 * info frame will not be sent automatically. Try to
  	 * get out of this state by inquiring CommTallies. */
  	if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
  		hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
  				     HFA384X_INFO_COMMTALLIES, NULL, 0);
  		last_inquire = jiffies;
  	}
  }
  
  
  /* Called only from hardware IRQ */
  static void prism2_ev_tick(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	local_info_t *local;
  	u16 evstat, inten;
  	static int prev_stuck = 0;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
  	    local->last_tick_timer) {
  		evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
  		inten = HFA384X_INW(HFA384X_INTEN_OFF);
  		if (!prev_stuck) {
  			printk(KERN_INFO "%s: SW TICK stuck? "
  			       "bits=0x%lx EvStat=%04x IntEn=%04x\n",
  			       dev->name, local->bits, evstat, inten);
  		}
  		local->sw_tick_stuck++;
  		if ((evstat & HFA384X_BAP0_EVENTS) &&
  		    (inten & HFA384X_BAP0_EVENTS)) {
  			printk(KERN_INFO "%s: trying to recover from IRQ "
  			       "hang\n", dev->name);
  			hfa384x_events_no_bap0(dev);
  		}
  		prev_stuck = 1;
  	} else
  		prev_stuck = 0;
  }
  
  
  /* Called only from hardware IRQ */
  static void prism2_check_magic(local_info_t *local)
  {
  	/* at least PCI Prism2.5 with bus mastering seems to sometimes
  	 * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
  	 * register once or twice seems to get the correct value.. PCI cards
  	 * cannot anyway be removed during normal operation, so there is not
  	 * really any need for this verification with them. */
  
  #ifndef PRISM2_PCI
  #ifndef final_version
  	static unsigned long last_magic_err = 0;
  	struct net_device *dev = local->dev;
  
  	if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
  		if (!local->hw_ready)
  			return;
  		HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
  		if (time_after(jiffies, last_magic_err + 10 * HZ)) {
  			printk("%s: Interrupt, but SWSUPPORT0 does not match: "
  			       "%04X != %04X - card removed?\n", dev->name,
  			       HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
  			       HFA384X_MAGIC);
  			last_magic_err = jiffies;
  		} else if (net_ratelimit()) {
  			printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
  			       "MAGIC=%04x\n", dev->name,
  			       HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
  			       HFA384X_MAGIC);
  		}
  		if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
  			schedule_work(&local->reset_queue);
  		return;
  	}
  #endif /* final_version */
  #endif /* !PRISM2_PCI */
  }
  
  
  /* Called only from hardware IRQ */
  static irqreturn_t prism2_interrupt(int irq, void *dev_id)
  {
  	struct net_device *dev = dev_id;
  	struct hostap_interface *iface;
  	local_info_t *local;
  	int events = 0;
  	u16 ev;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	/* Detect early interrupt before driver is fully configured */
  	spin_lock(&local->irq_init_lock);
  	if (!dev->base_addr) {
  		if (net_ratelimit()) {
  			printk(KERN_DEBUG "%s: Interrupt, but dev not configured\n",
  			       dev->name);
  		}
  		spin_unlock(&local->irq_init_lock);
  		return IRQ_HANDLED;
  	}
  	spin_unlock(&local->irq_init_lock);
  
  	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
  
  	if (local->func->card_present && !local->func->card_present(local)) {
  		if (net_ratelimit()) {
  			printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
  			       dev->name);
  		}
  		return IRQ_HANDLED;
  	}
  
  	prism2_check_magic(local);
  
  	for (;;) {
  		ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
  		if (ev == 0xffff) {
  			if (local->shutdown)
  				return IRQ_HANDLED;
  			HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
  			printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
  			       dev->name);
  			return IRQ_HANDLED;
  		}
  
  		ev &= HFA384X_INW(HFA384X_INTEN_OFF);
  		if (ev == 0)
  			break;
  
  		if (ev & HFA384X_EV_CMD) {
  			prism2_cmd_ev(dev);
  		}
  
  		/* Above events are needed even before hw is ready, but other
  		 * events should be skipped during initialization. This may
  		 * change for AllocEv if allocate_fid is implemented without
  		 * busy waiting. */
  		if (!local->hw_ready || local->hw_resetting ||
  		    !local->dev_enabled) {
  			ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
  			if (ev & HFA384X_EV_CMD)
  				goto next_event;
  			if ((ev & HFA384X_EVENT_MASK) == 0)
  				return IRQ_HANDLED;
  			if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
  			    net_ratelimit()) {
  				printk(KERN_DEBUG "%s: prism2_interrupt: hw "
  				       "not ready; skipping events 0x%04x "
  				       "(IntEn=0x%04x)%s%s%s\n",
  				       dev->name, ev,
  				       HFA384X_INW(HFA384X_INTEN_OFF),
  				       !local->hw_ready ? " (!hw_ready)" : "",
  				       local->hw_resetting ?
  				       " (hw_resetting)" : "",
  				       !local->dev_enabled ?
  				       " (!dev_enabled)" : "");
  			}
  			HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
  			return IRQ_HANDLED;
  		}
  
  		if (ev & HFA384X_EV_TICK) {
  			prism2_ev_tick(dev);
  			HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
  		}
  
  		if (ev & HFA384X_EV_ALLOC) {
  			prism2_alloc_ev(dev);
  			HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
  		}
  
  		/* Reading data from the card is quite time consuming, so do it
  		 * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
  		 * and unmasked after needed data has been read completely. */
  		if (ev & HFA384X_BAP0_EVENTS) {
  			hfa384x_events_no_bap0(dev);
  			tasklet_schedule(&local->bap_tasklet);
  		}
  
  #ifndef final_version
  		if (ev & HFA384X_EV_WTERR) {
  			PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
  			HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
  		}
  #endif /* final_version */
  
  		if (ev & HFA384X_EV_INFDROP) {
  			prism2_infdrop(dev);
  			HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
  		}
  
  	next_event:
  		events++;
  		if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
  			PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
  			       "(EvStat=0x%04x)\n",
  			       PRISM2_MAX_INTERRUPT_EVENTS,
  			       HFA384X_INW(HFA384X_EVSTAT_OFF));
  			break;
  		}
  	}
  	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
  	return IRQ_RETVAL(events);
  }
  
  
  static void prism2_check_sta_fw_version(local_info_t *local)
  {
  	struct hfa384x_comp_ident comp;
  	int id, variant, major, minor;
  
  	if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
  			    &comp, sizeof(comp), 1) < 0)
  		return;
  
  	local->fw_ap = 0;
  	id = le16_to_cpu(comp.id);
  	if (id != HFA384X_COMP_ID_STA) {
  		if (id == HFA384X_COMP_ID_FW_AP)
  			local->fw_ap = 1;
  		return;
  	}
  
  	major = __le16_to_cpu(comp.major);
  	minor = __le16_to_cpu(comp.minor);
  	variant = __le16_to_cpu(comp.variant);
  	local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
  
  	/* Station firmware versions before 1.4.x seem to have a bug in
  	 * firmware-based WEP encryption when using Host AP mode, so use
  	 * host_encrypt as a default for them. Firmware version 1.4.9 is the
  	 * first one that has been seen to produce correct encryption, but the
  	 * bug might be fixed before that (although, at least 1.4.2 is broken).
  	 */
  	local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
  
  	if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
  	    !local->fw_encrypt_ok) {
  		printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
  		       "a workaround for firmware bug in Host AP mode WEP\n",
  		       local->dev->name);
  		local->host_encrypt = 1;
  	}
  
  	/* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
  	 * in station firmware versions before 1.5.x. With these versions, the
  	 * driver uses a workaround with bogus frame format (4th address after
  	 * the payload). This is not compatible with other AP devices. Since
  	 * the firmware bug is fixed in the latest station firmware versions,
  	 * automatically enable standard compliant mode for cards using station
  	 * firmware version 1.5.0 or newer. */
  	if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
  		local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
  	else {
  		printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
  		       "workaround for firmware bug in Host AP mode WDS\n",
  		       local->dev->name);
  	}
  
  	hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
  }
  
  
  static void hostap_passive_scan(struct timer_list *t)
  {
  	local_info_t *local = from_timer(local, t, passive_scan_timer);
  	struct net_device *dev = local->dev;
  	u16 chan;
  
  	if (local->passive_scan_interval <= 0)
  		return;
  
  	if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
  		int max_tries = 16;
  
  		/* Even though host system does not really know when the WLAN
  		 * MAC is sending frames, try to avoid changing channels for
  		 * passive scanning when a host-generated frame is being
  		 * transmitted */
  		if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
  			printk(KERN_DEBUG "%s: passive scan detected pending "
  			       "TX - delaying\n", dev->name);
  			local->passive_scan_timer.expires = jiffies + HZ / 10;
  			add_timer(&local->passive_scan_timer);
  			return;
  		}
  
  		do {
  			local->passive_scan_channel++;
  			if (local->passive_scan_channel > 14)
  				local->passive_scan_channel = 1;
  			max_tries--;
  		} while (!(local->channel_mask &
  			   (1 << (local->passive_scan_channel - 1))) &&
  			 max_tries > 0);
  
  		if (max_tries == 0) {
  			printk(KERN_INFO "%s: no allowed passive scan channels"
  			       " found\n", dev->name);
  			return;
  		}
  
  		printk(KERN_DEBUG "%s: passive scan channel %d\n",
  		       dev->name, local->passive_scan_channel);
  		chan = local->passive_scan_channel;
  		local->passive_scan_state = PASSIVE_SCAN_WAIT;
  		local->passive_scan_timer.expires = jiffies + HZ / 10;
  	} else {
  		chan = local->channel;
  		local->passive_scan_state = PASSIVE_SCAN_LISTEN;
  		local->passive_scan_timer.expires = jiffies +
  			local->passive_scan_interval * HZ;
  	}
  
  	if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
  				 (HFA384X_TEST_CHANGE_CHANNEL << 8),
  				 chan, NULL, 0))
  		printk(KERN_ERR "%s: passive scan channel set %d "
  		       "failed\n", dev->name, chan);
  
  	add_timer(&local->passive_scan_timer);
  }
  
  
  /* Called only as a scheduled task when communications quality values should
   * be updated. */
  static void handle_comms_qual_update(struct work_struct *work)
  {
  	local_info_t *local =
  		container_of(work, local_info_t, comms_qual_update);
  	prism2_update_comms_qual(local->dev);
  }
  
  
  /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
   * used to monitor that local->last_tick_timer is being updated. If not,
   * interrupt busy-loop is assumed and driver tries to recover by masking out
   * some events. */
  static void hostap_tick_timer(struct timer_list *t)
  {
  	static unsigned long last_inquire = 0;
  	local_info_t *local = from_timer(local, t, tick_timer);
  	local->last_tick_timer = jiffies;
  
  	/* Inquire CommTallies every 10 seconds to keep the statistics updated
  	 * more often during low load and when using 32-bit tallies. */
  	if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
  	    !local->hw_downloading && local->hw_ready &&
  	    !local->hw_resetting && local->dev_enabled) {
  		hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
  				     HFA384X_INFO_COMMTALLIES, NULL, 0);
  		last_inquire = jiffies;
  	}
  
  	if ((local->last_comms_qual_update == 0 ||
  	     time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
  	    (local->iw_mode == IW_MODE_INFRA ||
  	     local->iw_mode == IW_MODE_ADHOC)) {
  		schedule_work(&local->comms_qual_update);
  	}
  
  	local->tick_timer.expires = jiffies + 2 * HZ;
  	add_timer(&local->tick_timer);
  }
  
  
  #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
  static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
  {
  	return HFA384X_INW(reg);
  }
  
  static int prism2_registers_proc_show(struct seq_file *m, void *v)
  {
  	local_info_t *local = m->private;
  
  #define SHOW_REG(n) \
    seq_printf(m, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
  
  	SHOW_REG(CMD);
  	SHOW_REG(PARAM0);
  	SHOW_REG(PARAM1);
  	SHOW_REG(PARAM2);
  	SHOW_REG(STATUS);
  	SHOW_REG(RESP0);
  	SHOW_REG(RESP1);
  	SHOW_REG(RESP2);
  	SHOW_REG(INFOFID);
  	SHOW_REG(CONTROL);
  	SHOW_REG(SELECT0);
  	SHOW_REG(SELECT1);
  	SHOW_REG(OFFSET0);
  	SHOW_REG(OFFSET1);
  	SHOW_REG(RXFID);
  	SHOW_REG(ALLOCFID);
  	SHOW_REG(TXCOMPLFID);
  	SHOW_REG(SWSUPPORT0);
  	SHOW_REG(SWSUPPORT1);
  	SHOW_REG(SWSUPPORT2);
  	SHOW_REG(EVSTAT);
  	SHOW_REG(INTEN);
  	SHOW_REG(EVACK);
  	/* Do not read data registers, because they change the state of the
  	 * MAC (offset += 2) */
  	/* SHOW_REG(DATA0); */
  	/* SHOW_REG(DATA1); */
  	SHOW_REG(AUXPAGE);
  	SHOW_REG(AUXOFFSET);
  	/* SHOW_REG(AUXDATA); */
  #ifdef PRISM2_PCI
  	SHOW_REG(PCICOR);
  	SHOW_REG(PCIHCR);
  	SHOW_REG(PCI_M0_ADDRH);
  	SHOW_REG(PCI_M0_ADDRL);
  	SHOW_REG(PCI_M0_LEN);
  	SHOW_REG(PCI_M0_CTL);
  	SHOW_REG(PCI_STATUS);
  	SHOW_REG(PCI_M1_ADDRH);
  	SHOW_REG(PCI_M1_ADDRL);
  	SHOW_REG(PCI_M1_LEN);
  	SHOW_REG(PCI_M1_CTL);
  #endif /* PRISM2_PCI */
  
  	return 0;
  }
  #endif
  
  struct set_tim_data {
  	struct list_head list;
  	int aid;
  	int set;
  };
  
  static int prism2_set_tim(struct net_device *dev, int aid, int set)
  {
  	struct list_head *ptr;
  	struct set_tim_data *new_entry;
  	struct hostap_interface *iface;
  	local_info_t *local;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
  	if (new_entry == NULL)
  		return -ENOMEM;
  
  	new_entry->aid = aid;
  	new_entry->set = set;
  
  	spin_lock_bh(&local->set_tim_lock);
  	list_for_each(ptr, &local->set_tim_list) {
  		struct set_tim_data *entry =
  			list_entry(ptr, struct set_tim_data, list);
  		if (entry->aid == aid) {
  			PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
  			       "set=%d ==> %d\n",
  			       local->dev->name, aid, entry->set, set);
  			entry->set = set;
  			kfree(new_entry);
  			new_entry = NULL;
  			break;
  		}
  	}
  	if (new_entry)
  		list_add_tail(&new_entry->list, &local->set_tim_list);
  	spin_unlock_bh(&local->set_tim_lock);
  
  	schedule_work(&local->set_tim_queue);
  
  	return 0;
  }
  
  
  static void handle_set_tim_queue(struct work_struct *work)
  {
  	local_info_t *local = container_of(work, local_info_t, set_tim_queue);
  	struct set_tim_data *entry;
  	u16 val;
  
  	for (;;) {
  		entry = NULL;
  		spin_lock_bh(&local->set_tim_lock);
  		if (!list_empty(&local->set_tim_list)) {
  			entry = list_entry(local->set_tim_list.next,
  					   struct set_tim_data, list);
  			list_del(&entry->list);
  		}
  		spin_unlock_bh(&local->set_tim_lock);
  		if (!entry)
  			break;
  
  		PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
  		       local->dev->name, entry->aid, entry->set);
  
  		val = entry->aid;
  		if (entry->set)
  			val |= 0x8000;
  		if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
  			printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
  			       "set=%d)\n",
  			       local->dev->name, entry->aid, entry->set);
  		}
  
  		kfree(entry);
  	}
  }
  
  
  static void prism2_clear_set_tim_queue(local_info_t *local)
  {
  	struct list_head *ptr, *n;
  
  	list_for_each_safe(ptr, n, &local->set_tim_list) {
  		struct set_tim_data *entry;
  		entry = list_entry(ptr, struct set_tim_data, list);
  		list_del(&entry->list);
  		kfree(entry);
  	}
  }
  
  
  /*
   * HostAP uses two layers of net devices, where the inner
   * layer gets called all the time from the outer layer.
   * This is a natural nesting, which needs a split lock type.
   */
  static struct lock_class_key hostap_netdev_xmit_lock_key;
  static struct lock_class_key hostap_netdev_addr_lock_key;
  
  static void prism2_set_lockdep_class_one(struct net_device *dev,
  					 struct netdev_queue *txq,
  					 void *_unused)
  {
  	lockdep_set_class(&txq->_xmit_lock,
  			  &hostap_netdev_xmit_lock_key);
  }
  
  static void prism2_set_lockdep_class(struct net_device *dev)
  {
  	lockdep_set_class(&dev->addr_list_lock,
  			  &hostap_netdev_addr_lock_key);
  	netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
  }
  
  static struct net_device *
  prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
  		       struct device *sdev)
  {
  	struct net_device *dev;
  	struct hostap_interface *iface;
  	struct local_info *local;
  	int len, i, ret;
  
  	if (funcs == NULL)
  		return NULL;
  
  	len = strlen(dev_template);
  	if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
  		printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
  		       dev_template);
  		return NULL;
  	}
  
  	len = sizeof(struct hostap_interface) +
  		3 + sizeof(struct local_info) +
  		3 + sizeof(struct ap_data);
  
  	dev = alloc_etherdev(len);
  	if (dev == NULL)
  		return NULL;
  
  	iface = netdev_priv(dev);
  	local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
  	local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
  	local->dev = iface->dev = dev;
  	iface->local = local;
  	iface->type = HOSTAP_INTERFACE_MASTER;
  	INIT_LIST_HEAD(&local->hostap_interfaces);
  
  	local->hw_module = THIS_MODULE;
  
  #ifdef PRISM2_IO_DEBUG
  	local->io_debug_enabled = 1;
  #endif /* PRISM2_IO_DEBUG */
  
  	local->func = funcs;
  	local->func->cmd = hfa384x_cmd;
  	local->func->read_regs = hfa384x_read_regs;
  	local->func->get_rid = hfa384x_get_rid;
  	local->func->set_rid = hfa384x_set_rid;
  	local->func->hw_enable = prism2_hw_enable;
  	local->func->hw_config = prism2_hw_config;
  	local->func->hw_reset = prism2_hw_reset;
  	local->func->hw_shutdown = prism2_hw_shutdown;
  	local->func->reset_port = prism2_reset_port;
  	local->func->schedule_reset = prism2_schedule_reset;
  #ifdef PRISM2_DOWNLOAD_SUPPORT
  	local->func->read_aux_proc_ops = &prism2_download_aux_dump_proc_ops;
  	local->func->download = prism2_download;
  #endif /* PRISM2_DOWNLOAD_SUPPORT */
  	local->func->tx = prism2_tx_80211;
  	local->func->set_tim = prism2_set_tim;
  	local->func->need_tx_headroom = 0; /* no need to add txdesc in
  					    * skb->data (FIX: maybe for DMA bus
  					    * mastering? */
  
  	local->mtu = mtu;
  
  	rwlock_init(&local->iface_lock);
  	spin_lock_init(&local->txfidlock);
  	spin_lock_init(&local->cmdlock);
  	spin_lock_init(&local->baplock);
  	spin_lock_init(&local->lock);
  	spin_lock_init(&local->irq_init_lock);
  	mutex_init(&local->rid_bap_mtx);
  
  	if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
  		card_idx = 0;
  	local->card_idx = card_idx;
  
  	len = strlen(essid);
  	memcpy(local->essid, essid,
  	       len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
  	local->essid[MAX_SSID_LEN] = '\0';
  	i = GET_INT_PARM(iw_mode, card_idx);
  	if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
  	    i == IW_MODE_MONITOR) {
  		local->iw_mode = i;
  	} else {
  		printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
  		       "IW_MODE_MASTER\n", i);
  		local->iw_mode = IW_MODE_MASTER;
  	}
  	local->channel = GET_INT_PARM(channel, card_idx);
  	local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
  	local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
  	local->wds_max_connections = 16;
  	local->tx_control = HFA384X_TX_CTRL_FLAGS;
  	local->manual_retry_count = -1;
  	local->rts_threshold = 2347;
  	local->fragm_threshold = 2346;
  	local->rssi_to_dBm = 100; /* default; to be overriden by
  				   * cnfDbmAdjust, if available */
  	local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
  	local->sram_type = -1;
  	local->scan_channel_mask = 0xffff;
  	local->monitor_type = PRISM2_MONITOR_RADIOTAP;
  
  	/* Initialize task queue structures */
  	INIT_WORK(&local->reset_queue, handle_reset_queue);
  	INIT_WORK(&local->set_multicast_list_queue,
  		  hostap_set_multicast_list_queue);
  
  	INIT_WORK(&local->set_tim_queue, handle_set_tim_queue);
  	INIT_LIST_HEAD(&local->set_tim_list);
  	spin_lock_init(&local->set_tim_lock);
  
  	INIT_WORK(&local->comms_qual_update, handle_comms_qual_update);
  
  	/* Initialize tasklets for handling hardware IRQ related operations
  	 * outside hw IRQ handler */
  	tasklet_setup(&local->bap_tasklet, hostap_bap_tasklet);
  	tasklet_setup(&local->info_tasklet, hostap_info_tasklet);
  	hostap_info_init(local);
  
  	tasklet_setup(&local->rx_tasklet, hostap_rx_tasklet);
  	skb_queue_head_init(&local->rx_list);
  
  	tasklet_setup(&local->sta_tx_exc_tasklet,
  			    hostap_sta_tx_exc_tasklet);
  	skb_queue_head_init(&local->sta_tx_exc_list);
  
  	INIT_LIST_HEAD(&local->cmd_queue);
  	init_waitqueue_head(&local->hostscan_wq);
  
  	lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
  
  	timer_setup(&local->passive_scan_timer, hostap_passive_scan, 0);
  	timer_setup(&local->tick_timer, hostap_tick_timer, 0);
  	local->tick_timer.expires = jiffies + 2 * HZ;
  	add_timer(&local->tick_timer);
  
  	INIT_LIST_HEAD(&local->bss_list);
  
  	hostap_setup_dev(dev, local, HOSTAP_INTERFACE_MASTER);
  
  	dev->type = ARPHRD_IEEE80211;
  	dev->header_ops = &hostap_80211_ops;
  
  	rtnl_lock();
  	ret = dev_alloc_name(dev, "wifi%d");
  	SET_NETDEV_DEV(dev, sdev);
  	if (ret >= 0)
  		ret = register_netdevice(dev);
  
  	prism2_set_lockdep_class(dev);
  	rtnl_unlock();
  	if (ret < 0) {
  		printk(KERN_WARNING "%s: register netdevice failed!\n",
  		       dev_info);
  		goto fail;
  	}
  	printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
  
  	hostap_init_data(local);
  	return dev;
  
   fail:
  	free_netdev(dev);
  	return NULL;
  }
  
  
  static int hostap_hw_ready(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	struct local_info *local;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  	local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
  					   "", dev_template);
  
  	if (local->ddev) {
  		if (local->iw_mode == IW_MODE_INFRA ||
  		    local->iw_mode == IW_MODE_ADHOC) {
  			netif_carrier_off(local->dev);
  			netif_carrier_off(local->ddev);
  		}
  		hostap_init_proc(local);
  #ifndef PRISM2_NO_PROCFS_DEBUG
  		proc_create_single_data("registers", 0, local->proc,
  				 prism2_registers_proc_show, local);
  #endif /* PRISM2_NO_PROCFS_DEBUG */
  		hostap_init_ap_proc(local);
  		return 0;
  	}
  
  	return -1;
  }
  
  
  static void prism2_free_local_data(struct net_device *dev)
  {
  	struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
  	int i;
  	struct hostap_interface *iface;
  	struct local_info *local;
  	struct list_head *ptr, *n;
  
  	if (dev == NULL)
  		return;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	/* Unregister all netdevs before freeing local data. */
  	list_for_each_safe(ptr, n, &local->hostap_interfaces) {
  		iface = list_entry(ptr, struct hostap_interface, list);
  		if (iface->type == HOSTAP_INTERFACE_MASTER) {
  			/* special handling for this interface below */
  			continue;
  		}
  		hostap_remove_interface(iface->dev, 0, 1);
  	}
  
  	unregister_netdev(local->dev);
  
  	flush_work(&local->reset_queue);
  	flush_work(&local->set_multicast_list_queue);
  	flush_work(&local->set_tim_queue);
  #ifndef PRISM2_NO_STATION_MODES
  	flush_work(&local->info_queue);
  #endif
  	flush_work(&local->comms_qual_update);
  
  	lib80211_crypt_info_free(&local->crypt_info);
  
  	if (timer_pending(&local->passive_scan_timer))
  		del_timer(&local->passive_scan_timer);
  
  	if (timer_pending(&local->tick_timer))
  		del_timer(&local->tick_timer);
  
  	prism2_clear_cmd_queue(local);
  
  	skb_queue_purge(&local->info_list);
  	skb_queue_purge(&local->rx_list);
  	skb_queue_purge(&local->sta_tx_exc_list);
  
  	if (local->dev_enabled)
  		prism2_callback(local, PRISM2_CALLBACK_DISABLE);
  
  	if (local->ap != NULL)
  		hostap_free_data(local->ap);
  
  #ifndef PRISM2_NO_PROCFS_DEBUG
  	if (local->proc != NULL)
  		remove_proc_entry("registers", local->proc);
  #endif /* PRISM2_NO_PROCFS_DEBUG */
  	hostap_remove_proc(local);
  
  	tx_cb = local->tx_callback;
  	while (tx_cb != NULL) {
  		tx_cb_prev = tx_cb;
  		tx_cb = tx_cb->next;
  		kfree(tx_cb_prev);
  	}
  
  	hostap_set_hostapd(local, 0, 0);
  	hostap_set_hostapd_sta(local, 0, 0);
  
  	for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
  		if (local->frag_cache[i].skb != NULL)
  			dev_kfree_skb(local->frag_cache[i].skb);
  	}
  
  #ifdef PRISM2_DOWNLOAD_SUPPORT
  	prism2_download_free_data(local->dl_pri);
  	prism2_download_free_data(local->dl_sec);
  #endif /* PRISM2_DOWNLOAD_SUPPORT */
  
  	prism2_clear_set_tim_queue(local);
  
  	list_for_each_safe(ptr, n, &local->bss_list) {
  		struct hostap_bss_info *bss =
  			list_entry(ptr, struct hostap_bss_info, list);
  		kfree(bss);
  	}
  
  	kfree(local->pda);
  	kfree(local->last_scan_results);
  	kfree(local->generic_elem);
  
  	free_netdev(local->dev);
  }
  
  
  #if defined(PRISM2_PCI) || defined(PRISM2_PCCARD)
  static void __maybe_unused prism2_suspend(struct net_device *dev)
  {
  	struct hostap_interface *iface;
  	struct local_info *local;
  	union iwreq_data wrqu;
  
  	iface = netdev_priv(dev);
  	local = iface->local;
  
  	/* Send disconnect event, e.g., to trigger reassociation after resume
  	 * if wpa_supplicant is used. */
  	memset(&wrqu, 0, sizeof(wrqu));
  	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
  	wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
  
  	/* Disable hardware and firmware */
  	prism2_hw_shutdown(dev, 0);
  }
  #endif /* PRISM2_PCI || PRISM2_PCCARD */
  
  
  /* These might at some point be compiled separately and used as separate
   * kernel modules or linked into one */
  #ifdef PRISM2_DOWNLOAD_SUPPORT
  #include "hostap_download.c"
  #endif /* PRISM2_DOWNLOAD_SUPPORT */
  
  #ifdef PRISM2_CALLBACK
  /* External hostap_callback.c file can be used to, e.g., blink activity led.
   * This can use platform specific code and must define prism2_callback()
   * function (if PRISM2_CALLBACK is not defined, these function calls are not
   * used. */
  #include "hostap_callback.c"
  #endif /* PRISM2_CALLBACK */
  