OSCL-LXR linux-6.0.1/​drivers/​net/​wireless/​intersil/​hostap/​hostap_hw.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // 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 */