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p54common.c

/*
 * Common code for mac80211 Prism54 drivers
 *
 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
 * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
 *
 * Based on:
 * - the islsm (softmac prism54) driver, which is:
 *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
 * - stlc45xx driver
 *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>

#include <net/mac80211.h>
#ifdef CONFIG_P54_LEDS
#include <linux/leds.h>
#endif /* CONFIG_P54_LEDS */

#include "p54.h"
#include "p54common.h"

static int modparam_nohwcrypt;
module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_DESCRIPTION("Softmac Prism54 common code");
MODULE_LICENSE("GPL");
MODULE_ALIAS("prism54common");

static struct ieee80211_rate p54_bgrates[] = {
      { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
      { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
      { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
      { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
      { .bitrate = 60, .hw_value = 4, },
      { .bitrate = 90, .hw_value = 5, },
      { .bitrate = 120, .hw_value = 6, },
      { .bitrate = 180, .hw_value = 7, },
      { .bitrate = 240, .hw_value = 8, },
      { .bitrate = 360, .hw_value = 9, },
      { .bitrate = 480, .hw_value = 10, },
      { .bitrate = 540, .hw_value = 11, },
};

static struct ieee80211_channel p54_bgchannels[] = {
      { .center_freq = 2412, .hw_value = 1, },
      { .center_freq = 2417, .hw_value = 2, },
      { .center_freq = 2422, .hw_value = 3, },
      { .center_freq = 2427, .hw_value = 4, },
      { .center_freq = 2432, .hw_value = 5, },
      { .center_freq = 2437, .hw_value = 6, },
      { .center_freq = 2442, .hw_value = 7, },
      { .center_freq = 2447, .hw_value = 8, },
      { .center_freq = 2452, .hw_value = 9, },
      { .center_freq = 2457, .hw_value = 10, },
      { .center_freq = 2462, .hw_value = 11, },
      { .center_freq = 2467, .hw_value = 12, },
      { .center_freq = 2472, .hw_value = 13, },
      { .center_freq = 2484, .hw_value = 14, },
};

static struct ieee80211_supported_band band_2GHz = {
      .channels = p54_bgchannels,
      .n_channels = ARRAY_SIZE(p54_bgchannels),
      .bitrates = p54_bgrates,
      .n_bitrates = ARRAY_SIZE(p54_bgrates),
};

static struct ieee80211_rate p54_arates[] = {
      { .bitrate = 60, .hw_value = 4, },
      { .bitrate = 90, .hw_value = 5, },
      { .bitrate = 120, .hw_value = 6, },
      { .bitrate = 180, .hw_value = 7, },
      { .bitrate = 240, .hw_value = 8, },
      { .bitrate = 360, .hw_value = 9, },
      { .bitrate = 480, .hw_value = 10, },
      { .bitrate = 540, .hw_value = 11, },
};

static struct ieee80211_channel p54_achannels[] = {
      { .center_freq = 4920 },
      { .center_freq = 4940 },
      { .center_freq = 4960 },
      { .center_freq = 4980 },
      { .center_freq = 5040 },
      { .center_freq = 5060 },
      { .center_freq = 5080 },
      { .center_freq = 5170 },
      { .center_freq = 5180 },
      { .center_freq = 5190 },
      { .center_freq = 5200 },
      { .center_freq = 5210 },
      { .center_freq = 5220 },
      { .center_freq = 5230 },
      { .center_freq = 5240 },
      { .center_freq = 5260 },
      { .center_freq = 5280 },
      { .center_freq = 5300 },
      { .center_freq = 5320 },
      { .center_freq = 5500 },
      { .center_freq = 5520 },
      { .center_freq = 5540 },
      { .center_freq = 5560 },
      { .center_freq = 5580 },
      { .center_freq = 5600 },
      { .center_freq = 5620 },
      { .center_freq = 5640 },
      { .center_freq = 5660 },
      { .center_freq = 5680 },
      { .center_freq = 5700 },
      { .center_freq = 5745 },
      { .center_freq = 5765 },
      { .center_freq = 5785 },
      { .center_freq = 5805 },
      { .center_freq = 5825 },
};

static struct ieee80211_supported_band band_5GHz = {
      .channels = p54_achannels,
      .n_channels = ARRAY_SIZE(p54_achannels),
      .bitrates = p54_arates,
      .n_bitrates = ARRAY_SIZE(p54_arates),
};

int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
{
      struct p54_common *priv = dev->priv;
      struct bootrec_exp_if *exp_if;
      struct bootrec *bootrec;
      u32 *data = (u32 *)fw->data;
      u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
      u8 *fw_version = NULL;
      size_t len;
      int i;
      int maxlen;

      if (priv->rx_start)
            return 0;

      while (data < end_data && *data)
            data++;

      while (data < end_data && !*data)
            data++;

      bootrec = (struct bootrec *) data;

      while (bootrec->data <= end_data &&
             (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
            u32 code = le32_to_cpu(bootrec->code);
            switch (code) {
            case BR_CODE_COMPONENT_ID:
                  priv->fw_interface = be32_to_cpup((__be32 *)
                                   bootrec->data);
                  switch (priv->fw_interface) {
                  case FW_LM86:
                  case FW_LM20:
                  case FW_LM87: {
                        char *iftype = (char *)bootrec->data;
                        printk(KERN_INFO "%s: p54 detected a LM%c%c "
                                     "firmware\n",
                              wiphy_name(dev->wiphy),
                              iftype[2], iftype[3]);
                        break;
                        }
                  case FW_FMAC:
                  default:
                        printk(KERN_ERR "%s: unsupported firmware\n",
                              wiphy_name(dev->wiphy));
                        return -ENODEV;
                  }
                  break;
            case BR_CODE_COMPONENT_VERSION:
                  /* 24 bytes should be enough for all firmwares */
                  if (strnlen((unsigned char*)bootrec->data, 24) < 24)
                        fw_version = (unsigned char*)bootrec->data;
                  break;
            case BR_CODE_DESCR: {
                  struct bootrec_desc *desc =
                        (struct bootrec_desc *)bootrec->data;
                  priv->rx_start = le32_to_cpu(desc->rx_start);
                  /* FIXME add sanity checking */
                  priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
                  priv->headroom = desc->headroom;
                  priv->tailroom = desc->tailroom;
                  priv->privacy_caps = desc->privacy_caps;
                  priv->rx_keycache_size = desc->rx_keycache_size;
                  if (le32_to_cpu(bootrec->len) == 11)
                        priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
                  else
                        priv->rx_mtu = (size_t)
                              0x620 - priv->tx_hdr_len;
                  maxlen = priv->tx_hdr_len + /* USB devices */
                         sizeof(struct p54_rx_data) +
                         4 + /* rx alignment */
                         IEEE80211_MAX_FRAG_THRESHOLD;
                  if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) {
                        printk(KERN_INFO "p54: rx_mtu reduced from %d "
                                       "to %d\n", priv->rx_mtu,
                                     maxlen);
                        priv->rx_mtu = maxlen;
                  }
                  break;
                  }
            case BR_CODE_EXPOSED_IF:
                  exp_if = (struct bootrec_exp_if *) bootrec->data;
                  for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
                        if (exp_if[i].if_id == cpu_to_le16(0x1a))
                              priv->fw_var = le16_to_cpu(exp_if[i].variant);
                  break;
            case BR_CODE_DEPENDENT_IF:
                  break;
            case BR_CODE_END_OF_BRA:
            case LEGACY_BR_CODE_END_OF_BRA:
                  end_data = NULL;
                  break;
            default:
                  break;
            }
            bootrec = (struct bootrec *)&bootrec->data[len];
      }

      if (fw_version)
            printk(KERN_INFO "%s: FW rev %s - Softmac protocol %x.%x\n",
                  wiphy_name(dev->wiphy), fw_version,
                  priv->fw_var >> 8, priv->fw_var & 0xff);

      if (priv->fw_var < 0x500)
            printk(KERN_INFO "%s: you are using an obsolete firmware. "
                   "visit http://wireless.kernel.org/en/users/Drivers/p54 "
                   "and grab one for \"kernel >= 2.6.28\"!\n",
                  wiphy_name(dev->wiphy));

      if (priv->fw_var >= 0x300) {
            /* Firmware supports QoS, use it! */
            priv->tx_stats[P54_QUEUE_AC_VO].limit = 3;
            priv->tx_stats[P54_QUEUE_AC_VI].limit = 4;
            priv->tx_stats[P54_QUEUE_AC_BE].limit = 3;
            priv->tx_stats[P54_QUEUE_AC_BK].limit = 2;
            dev->queues = P54_QUEUE_AC_NUM;
      }

      if (!modparam_nohwcrypt) {
            printk(KERN_INFO "%s: cryptographic accelerator "
                         "WEP:%s, TKIP:%s, CCMP:%s\n",
                  wiphy_name(dev->wiphy),
                  (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" :
                  "no", (priv->privacy_caps & (BR_DESC_PRIV_CAP_TKIP |
                   BR_DESC_PRIV_CAP_MICHAEL)) ? "YES" : "no",
                  (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP) ?
                  "YES" : "no");

            if (priv->rx_keycache_size) {
                  /*
                   * NOTE:
                   *
                   * The firmware provides at most 255 (0 - 254) slots
                   * for keys which are then used to offload decryption.
                   * As a result the 255 entry (aka 0xff) can be used
                   * safely by the driver to mark keys that didn't fit
                   * into the full cache. This trick saves us from
                   * keeping a extra list for uploaded keys.
                   */

                  priv->used_rxkeys = kzalloc(BITS_TO_LONGS(
                        priv->rx_keycache_size), GFP_KERNEL);

                  if (!priv->used_rxkeys)
                        return -ENOMEM;
            }
      }

      return 0;
}
EXPORT_SYMBOL_GPL(p54_parse_firmware);

static int p54_convert_rev0(struct ieee80211_hw *dev,
                      struct pda_pa_curve_data *curve_data)
{
      struct p54_common *priv = dev->priv;
      struct p54_pa_curve_data_sample *dst;
      struct pda_pa_curve_data_sample_rev0 *src;
      size_t cd_len = sizeof(*curve_data) +
            (curve_data->points_per_channel*sizeof(*dst) + 2) *
             curve_data->channels;
      unsigned int i, j;
      void *source, *target;

      priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
                           GFP_KERNEL);
      if (!priv->curve_data)
            return -ENOMEM;

      priv->curve_data->entries = curve_data->channels;
      priv->curve_data->entry_size = sizeof(__le16) +
            sizeof(*dst) * curve_data->points_per_channel;
      priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
      priv->curve_data->len = cd_len;
      memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
      source = curve_data->data;
      target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
      for (i = 0; i < curve_data->channels; i++) {
            __le16 *freq = source;
            source += sizeof(__le16);
            *((__le16 *)target) = *freq;
            target += sizeof(__le16);
            for (j = 0; j < curve_data->points_per_channel; j++) {
                  dst = target;
                  src = source;

                  dst->rf_power = src->rf_power;
                  dst->pa_detector = src->pa_detector;
                  dst->data_64qam = src->pcv;
                  /* "invent" the points for the other modulations */
#define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
                  dst->data_16qam = SUB(src->pcv, 12);
                  dst->data_qpsk = SUB(dst->data_16qam, 12);
                  dst->data_bpsk = SUB(dst->data_qpsk, 12);
                  dst->data_barker = SUB(dst->data_bpsk, 14);
#undef SUB
                  target += sizeof(*dst);
                  source += sizeof(*src);
            }
      }

      return 0;
}

static int p54_convert_rev1(struct ieee80211_hw *dev,
                      struct pda_pa_curve_data *curve_data)
{
      struct p54_common *priv = dev->priv;
      struct p54_pa_curve_data_sample *dst;
      struct pda_pa_curve_data_sample_rev1 *src;
      size_t cd_len = sizeof(*curve_data) +
            (curve_data->points_per_channel*sizeof(*dst) + 2) *
             curve_data->channels;
      unsigned int i, j;
      void *source, *target;

      priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
                           GFP_KERNEL);
      if (!priv->curve_data)
            return -ENOMEM;

      priv->curve_data->entries = curve_data->channels;
      priv->curve_data->entry_size = sizeof(__le16) +
            sizeof(*dst) * curve_data->points_per_channel;
      priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
      priv->curve_data->len = cd_len;
      memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
      source = curve_data->data;
      target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
      for (i = 0; i < curve_data->channels; i++) {
            __le16 *freq = source;
            source += sizeof(__le16);
            *((__le16 *)target) = *freq;
            target += sizeof(__le16);
            for (j = 0; j < curve_data->points_per_channel; j++) {
                  memcpy(target, source, sizeof(*src));

                  target += sizeof(*dst);
                  source += sizeof(*src);
            }
            source++;
      }

      return 0;
}

static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
                              "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
static int p54_init_xbow_synth(struct ieee80211_hw *dev);

static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
                       u16 type)
{
      struct p54_common *priv = dev->priv;
      int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
      int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
      int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
      int i;

      if (len != (entry_size * num_entries)) {
            printk(KERN_ERR "%s: unknown rssi calibration data packing "
                         " type:(%x) len:%d.\n",
                   wiphy_name(dev->wiphy), type, len);

            print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
                             data, len);

            printk(KERN_ERR "%s: please report this issue.\n",
                  wiphy_name(dev->wiphy));
            return;
      }

      for (i = 0; i < num_entries; i++) {
            struct pda_rssi_cal_entry *cal = data +
                                     (offset + i * entry_size);
            priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
            priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
      }
}

static void p54_parse_default_country(struct ieee80211_hw *dev,
                              void *data, int len)
{
      struct pda_country *country;

      if (len != sizeof(*country)) {
            printk(KERN_ERR "%s: found possible invalid default country "
                        "eeprom entry. (entry size: %d)\n",
                   wiphy_name(dev->wiphy), len);

            print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
                             data, len);

            printk(KERN_ERR "%s: please report this issue.\n",
                  wiphy_name(dev->wiphy));
            return;
      }

      country = (struct pda_country *) data;
      if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
            regulatory_hint(dev->wiphy, country->alpha2);
      else {
            /* TODO:
             * write a shared/common function that converts
             * "Regulatory domain codes" (802.11-2007 14.8.2.2)
             * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
             */
      }
}

static int p54_convert_output_limits(struct ieee80211_hw *dev,
                             u8 *data, size_t len)
{
      struct p54_common *priv = dev->priv;

      if (len < 2)
            return -EINVAL;

      if (data[0] != 0) {
            printk(KERN_ERR "%s: unknown output power db revision:%x\n",
                   wiphy_name(dev->wiphy), data[0]);
            return -EINVAL;
      }

      if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
            return -EINVAL;

      priv->output_limit = kmalloc(data[1] *
            sizeof(struct pda_channel_output_limit) +
            sizeof(*priv->output_limit), GFP_KERNEL);

      if (!priv->output_limit)
            return -ENOMEM;

      priv->output_limit->offset = 0;
      priv->output_limit->entries = data[1];
      priv->output_limit->entry_size =
            sizeof(struct pda_channel_output_limit);
      priv->output_limit->len = priv->output_limit->entry_size *
                          priv->output_limit->entries +
                          priv->output_limit->offset;

      memcpy(priv->output_limit->data, &data[2],
             data[1] * sizeof(struct pda_channel_output_limit));

      return 0;
}

static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
                                     size_t total_len)
{
      struct p54_cal_database *dst;
      size_t payload_len, entries, entry_size, offset;

      payload_len = le16_to_cpu(src->len);
      entries = le16_to_cpu(src->entries);
      entry_size = le16_to_cpu(src->entry_size);
      offset = le16_to_cpu(src->offset);
      if (((entries * entry_size + offset) != payload_len) ||
           (payload_len + sizeof(*src) != total_len))
            return NULL;

      dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
      if (!dst)
            return NULL;

      dst->entries = entries;
      dst->entry_size = entry_size;
      dst->offset = offset;
      dst->len = payload_len;

      memcpy(dst->data, src->data, payload_len);
      return dst;
}

int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
{
      struct p54_common *priv = dev->priv;
      struct eeprom_pda_wrap *wrap = NULL;
      struct pda_entry *entry;
      unsigned int data_len, entry_len;
      void *tmp;
      int err;
      u8 *end = (u8 *)eeprom + len;
      u16 synth = 0;

      wrap = (struct eeprom_pda_wrap *) eeprom;
      entry = (void *)wrap->data + le16_to_cpu(wrap->len);

      /* verify that at least the entry length/code fits */
      while ((u8 *)entry <= end - sizeof(*entry)) {
            entry_len = le16_to_cpu(entry->len);
            data_len = ((entry_len - 1) << 1);

            /* abort if entry exceeds whole structure */
            if ((u8 *)entry + sizeof(*entry) + data_len > end)
                  break;

            switch (le16_to_cpu(entry->code)) {
            case PDR_MAC_ADDRESS:
                  if (data_len != ETH_ALEN)
                        break;
                  SET_IEEE80211_PERM_ADDR(dev, entry->data);
                  break;
            case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
                  if (priv->output_limit)
                        break;
                  err = p54_convert_output_limits(dev, entry->data,
                                          data_len);
                  if (err)
                        goto err;
                  break;
            case PDR_PRISM_PA_CAL_CURVE_DATA: {
                  struct pda_pa_curve_data *curve_data =
                        (struct pda_pa_curve_data *)entry->data;
                  if (data_len < sizeof(*curve_data)) {
                        err = -EINVAL;
                        goto err;
                  }

                  switch (curve_data->cal_method_rev) {
                  case 0:
                        err = p54_convert_rev0(dev, curve_data);
                        break;
                  case 1:
                        err = p54_convert_rev1(dev, curve_data);
                        break;
                  default:
                        printk(KERN_ERR "%s: unknown curve data "
                                    "revision %d\n",
                                    wiphy_name(dev->wiphy),
                                    curve_data->cal_method_rev);
                        err = -ENODEV;
                        break;
                  }
                  if (err)
                        goto err;
                  }
                  break;
            case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
                  priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
                  if (!priv->iq_autocal) {
                        err = -ENOMEM;
                        goto err;
                  }

                  memcpy(priv->iq_autocal, entry->data, data_len);
                  priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
                  break;
            case PDR_DEFAULT_COUNTRY:
                  p54_parse_default_country(dev, entry->data, data_len);
                  break;
            case PDR_INTERFACE_LIST:
                  tmp = entry->data;
                  while ((u8 *)tmp < entry->data + data_len) {
                        struct bootrec_exp_if *exp_if = tmp;
                        if (le16_to_cpu(exp_if->if_id) == 0xf)
                              synth = le16_to_cpu(exp_if->variant);
                        tmp += sizeof(struct bootrec_exp_if);
                  }
                  break;
            case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
                  if (data_len < 2)
                        break;
                  priv->version = *(u8 *)(entry->data + 1);
                  break;
            case PDR_RSSI_LINEAR_APPROXIMATION:
            case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
            case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
                  p54_parse_rssical(dev, entry->data, data_len,
                                le16_to_cpu(entry->code));
                  break;
            case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOM: {
                  __le16 *src = (void *) entry->data;
                  s16 *dst = (void *) &priv->rssical_db;
                  int i;

                  if (data_len != sizeof(priv->rssical_db)) {
                        err = -EINVAL;
                        goto err;
                  }
                  for (i = 0; i < sizeof(priv->rssical_db) /
                              sizeof(*src); i++)
                        *(dst++) = (s16) le16_to_cpu(*(src++));
                  }
                  break;
            case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
                  struct pda_custom_wrapper *pda = (void *) entry->data;
                  if (priv->output_limit || data_len < sizeof(*pda))
                        break;
                  priv->output_limit = p54_convert_db(pda, data_len);
                  }
                  break;
            case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
                  struct pda_custom_wrapper *pda = (void *) entry->data;
                  if (priv->curve_data || data_len < sizeof(*pda))
                        break;
                  priv->curve_data = p54_convert_db(pda, data_len);
                  }
                  break;
            case PDR_END:
                  /* make it overrun */
                  entry_len = len;
                  break;
            case PDR_MANUFACTURING_PART_NUMBER:
            case PDR_PDA_VERSION:
            case PDR_NIC_SERIAL_NUMBER:
            case PDR_REGULATORY_DOMAIN_LIST:
            case PDR_TEMPERATURE_TYPE:
            case PDR_PRISM_PCI_IDENTIFIER:
            case PDR_COUNTRY_INFORMATION:
            case PDR_OEM_NAME:
            case PDR_PRODUCT_NAME:
            case PDR_UTF8_OEM_NAME:
            case PDR_UTF8_PRODUCT_NAME:
            case PDR_COUNTRY_LIST:
            case PDR_ANTENNA_GAIN:
            case PDR_PRISM_INDIGO_PA_CALIBRATION_DATA:
            case PDR_REGULATORY_POWER_LIMITS:
            case PDR_RADIATED_TRANSMISSION_CORRECTION:
            case PDR_PRISM_TX_IQ_CALIBRATION:
            case PDR_BASEBAND_REGISTERS:
            case PDR_PER_CHANNEL_BASEBAND_REGISTERS:
                  break;
            default:
                  printk(KERN_INFO "%s: unknown eeprom code : 0x%x\n",
                        wiphy_name(dev->wiphy),
                        le16_to_cpu(entry->code));
                  break;
            }

            entry = (void *)entry + (entry_len + 1)*2;
      }

      if (!synth || !priv->iq_autocal || !priv->output_limit ||
          !priv->curve_data) {
            printk(KERN_ERR "%s: not all required entries found in eeprom!\n",
                  wiphy_name(dev->wiphy));
            err = -EINVAL;
            goto err;
      }

      priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
      if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
            p54_init_xbow_synth(dev);
      if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
            dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
      if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
            dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
      if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
            priv->rx_diversity_mask = 3;
      if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
            priv->tx_diversity_mask = 3;

      if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
            u8 perm_addr[ETH_ALEN];

            printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
                  wiphy_name(dev->wiphy));
            random_ether_addr(perm_addr);
            SET_IEEE80211_PERM_ADDR(dev, perm_addr);
      }

      printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
            wiphy_name(dev->wiphy),
            dev->wiphy->perm_addr,
            priv->version, p54_rf_chips[priv->rxhw]);

      return 0;

  err:
      if (priv->iq_autocal) {
            kfree(priv->iq_autocal);
            priv->iq_autocal = NULL;
      }

      if (priv->output_limit) {
            kfree(priv->output_limit);
            priv->output_limit = NULL;
      }

      if (priv->curve_data) {
            kfree(priv->curve_data);
            priv->curve_data = NULL;
      }

      printk(KERN_ERR "%s: eeprom parse failed!\n",
            wiphy_name(dev->wiphy));
      return err;
}
EXPORT_SYMBOL_GPL(p54_parse_eeprom);

static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
{
      struct p54_common *priv = dev->priv;
      int band = dev->conf.channel->band;

      if (priv->rxhw != PDR_SYNTH_FRONTEND_LONGBOW)
            return ((rssi * priv->rssical_db[band].mul) / 64 +
                   priv->rssical_db[band].add) / 4;
      else
            /*
             * TODO: find the correct formula
             */
            return ((rssi * priv->rssical_db[band].mul) / 64 +
                   priv->rssical_db[band].add) / 4;
}

static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      struct p54_common *priv = dev->priv;
      struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
      struct ieee80211_rx_status rx_status = {0};
      u16 freq = le16_to_cpu(hdr->freq);
      size_t header_len = sizeof(*hdr);
      u32 tsf32;
      u8 rate = hdr->rate & 0xf;

      /*
       * If the device is in a unspecified state we have to
       * ignore all data frames. Else we could end up with a
       * nasty crash.
       */
      if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
            return 0;

      if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
            return 0;
      }

      if (hdr->decrypt_status == P54_DECRYPT_OK)
            rx_status.flag |= RX_FLAG_DECRYPTED;
      if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
          (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
            rx_status.flag |= RX_FLAG_MMIC_ERROR;

      rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
      rx_status.noise = priv->noise;
      if (hdr->rate & 0x10)
            rx_status.flag |= RX_FLAG_SHORTPRE;
      if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
            rx_status.rate_idx = (rate < 4) ? 0 : rate - 4;
      else
            rx_status.rate_idx = rate;

      rx_status.freq = freq;
      rx_status.band =  dev->conf.channel->band;
      rx_status.antenna = hdr->antenna;

      tsf32 = le32_to_cpu(hdr->tsf32);
      if (tsf32 < priv->tsf_low32)
            priv->tsf_high32++;
      rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
      priv->tsf_low32 = tsf32;

      rx_status.flag |= RX_FLAG_TSFT;

      if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
            header_len += hdr->align[0];

      skb_pull(skb, header_len);
      skb_trim(skb, le16_to_cpu(hdr->len));

      ieee80211_rx_irqsafe(dev, skb, &rx_status);

      queue_delayed_work(dev->workqueue, &priv->work,
                     msecs_to_jiffies(P54_STATISTICS_UPDATE));

      return -1;
}

static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      int i;

      if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
            return ;

      for (i = 0; i < dev->queues; i++)
            if (priv->tx_stats[i + P54_QUEUE_DATA].len <
                priv->tx_stats[i + P54_QUEUE_DATA].limit)
                  ieee80211_wake_queue(dev, i);
}

void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      struct p54_common *priv = dev->priv;
      struct ieee80211_tx_info *info;
      struct p54_tx_info *range;
      unsigned long flags;

      if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue)))
            return;

      /*
       * don't try to free an already unlinked skb
       */
      if (unlikely((!skb->next) || (!skb->prev)))
            return;

      spin_lock_irqsave(&priv->tx_queue.lock, flags);
      info = IEEE80211_SKB_CB(skb);
      range = (void *)info->rate_driver_data;
      if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
            struct ieee80211_tx_info *ni;
            struct p54_tx_info *mr;

            ni = IEEE80211_SKB_CB(skb->prev);
            mr = (struct p54_tx_info *)ni->rate_driver_data;
      }
      if (skb->next != (struct sk_buff *)&priv->tx_queue) {
            struct ieee80211_tx_info *ni;
            struct p54_tx_info *mr;

            ni = IEEE80211_SKB_CB(skb->next);
            mr = (struct p54_tx_info *)ni->rate_driver_data;
      }
      __skb_unlink(skb, &priv->tx_queue);
      spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
      dev_kfree_skb_any(skb);
      p54_wake_free_queues(dev);
}
EXPORT_SYMBOL_GPL(p54_free_skb);

static struct sk_buff *p54_find_tx_entry(struct ieee80211_hw *dev,
                                 __le32 req_id)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *entry;
      unsigned long flags;

      spin_lock_irqsave(&priv->tx_queue.lock, flags);
      entry = priv->tx_queue.next;
      while (entry != (struct sk_buff *)&priv->tx_queue) {
            struct p54_hdr *hdr = (struct p54_hdr *) entry->data;

            if (hdr->req_id == req_id) {
                  spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
                  return entry;
            }
            entry = entry->next;
      }
      spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
      return NULL;
}

static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      struct p54_common *priv = dev->priv;
      struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
      struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
      struct sk_buff *entry;
      u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
      struct p54_tx_info *range = NULL;
      unsigned long flags;
      int count, idx;

      spin_lock_irqsave(&priv->tx_queue.lock, flags);
      entry = (struct sk_buff *) priv->tx_queue.next;
      while (entry != (struct sk_buff *)&priv->tx_queue) {
            struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
            struct p54_hdr *entry_hdr;
            struct p54_tx_data *entry_data;
            unsigned int pad = 0, frame_len;

            range = (void *)info->rate_driver_data;
            if (range->start_addr != addr) {
                  entry = entry->next;
                  continue;
            }

            if (entry->next != (struct sk_buff *)&priv->tx_queue) {
                  struct ieee80211_tx_info *ni;
                  struct p54_tx_info *mr;

                  ni = IEEE80211_SKB_CB(entry->next);
                  mr = (struct p54_tx_info *)ni->rate_driver_data;
            }

            __skb_unlink(entry, &priv->tx_queue);

            frame_len = entry->len;
            entry_hdr = (struct p54_hdr *) entry->data;
            entry_data = (struct p54_tx_data *) entry_hdr->data;
            if (priv->tx_stats[entry_data->hw_queue].len)
                  priv->tx_stats[entry_data->hw_queue].len--;
            priv->stats.dot11ACKFailureCount += payload->tries - 1;
            spin_unlock_irqrestore(&priv->tx_queue.lock, flags);

            /*
             * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are
             * generated by the driver. Therefore tx_status is bogus
             * and we don't want to confuse the mac80211 stack.
             */
            if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) {
                  if (entry_data->hw_queue == P54_QUEUE_BEACON)
                        priv->cached_beacon = NULL;

                  kfree_skb(entry);
                  goto out;
            }

            /*
             * Clear manually, ieee80211_tx_info_clear_status would
             * clear the counts too and we need them.
             */
            memset(&info->status.ampdu_ack_len, 0,
                   sizeof(struct ieee80211_tx_info) -
                   offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
            BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
                              status.ampdu_ack_len) != 23);

            if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
                  pad = entry_data->align[0];

            /* walk through the rates array and adjust the counts */
            count = payload->tries;
            for (idx = 0; idx < 4; idx++) {
                  if (count >= info->status.rates[idx].count) {
                        count -= info->status.rates[idx].count;
                  } else if (count > 0) {
                        info->status.rates[idx].count = count;
                        count = 0;
                  } else {
                        info->status.rates[idx].idx = -1;
                        info->status.rates[idx].count = 0;
                  }
            }

            if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
                 (!payload->status))
                  info->flags |= IEEE80211_TX_STAT_ACK;
            if (payload->status & P54_TX_PSM_CANCELLED)
                  info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
            info->status.ack_signal = p54_rssi_to_dbm(dev,
                        (int)payload->ack_rssi);

            /* Undo all changes to the frame. */
            switch (entry_data->key_type) {
            case P54_CRYPTO_TKIPMICHAEL: {
                  u8 *iv = (u8 *)(entry_data->align + pad +
                              entry_data->crypt_offset);

                  /* Restore the original TKIP IV. */
                  iv[2] = iv[0];
                  iv[0] = iv[1];
                  iv[1] = (iv[0] | 0x20) & 0x7f;      /* WEPSeed - 8.3.2.2 */

                  frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
                  break;
                  }
            case P54_CRYPTO_AESCCMP:
                  frame_len -= 8; /* remove CCMP_MIC */
                  break;
            case P54_CRYPTO_WEP:
                  frame_len -= 4; /* remove WEP_ICV */
                  break;
            }
            skb_trim(entry, frame_len);
            skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
            ieee80211_tx_status_irqsafe(dev, entry);
            goto out;
      }
      spin_unlock_irqrestore(&priv->tx_queue.lock, flags);

out:
      p54_wake_free_queues(dev);
}

static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
                           struct sk_buff *skb)
{
      struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
      struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
      struct p54_common *priv = dev->priv;

      if (!priv->eeprom)
            return ;

      if (priv->fw_var >= 0x509) {
            memcpy(priv->eeprom, eeprom->v2.data,
                   le16_to_cpu(eeprom->v2.len));
      } else {
            memcpy(priv->eeprom, eeprom->v1.data,
                   le16_to_cpu(eeprom->v1.len));
      }

      complete(&priv->eeprom_comp);
}

static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      struct p54_common *priv = dev->priv;
      struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
      struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
      u32 tsf32;

      if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
            return ;

      tsf32 = le32_to_cpu(stats->tsf32);
      if (tsf32 < priv->tsf_low32)
            priv->tsf_high32++;
      priv->tsf_low32 = tsf32;

      priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
      priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
      priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);

      priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));

      p54_free_skb(dev, p54_find_tx_entry(dev, hdr->req_id));
}

static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      struct p54_common *priv = dev->priv;
      struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
      struct p54_trap *trap = (struct p54_trap *) hdr->data;
      u16 event = le16_to_cpu(trap->event);
      u16 freq = le16_to_cpu(trap->frequency);

      switch (event) {
      case P54_TRAP_BEACON_TX:
            break;
      case P54_TRAP_RADAR:
            printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
                  wiphy_name(dev->wiphy), freq);
            break;
      case P54_TRAP_NO_BEACON:
            if (priv->vif)
                  ieee80211_beacon_loss(priv->vif);
            break;
      case P54_TRAP_SCAN:
            break;
      case P54_TRAP_TBTT:
            break;
      case P54_TRAP_TIMER:
            break;
      default:
            printk(KERN_INFO "%s: received event:%x freq:%d\n",
                   wiphy_name(dev->wiphy), event, freq);
            break;
      }
}

static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      struct p54_hdr *hdr = (struct p54_hdr *) skb->data;

      switch (le16_to_cpu(hdr->type)) {
      case P54_CONTROL_TYPE_TXDONE:
            p54_rx_frame_sent(dev, skb);
            break;
      case P54_CONTROL_TYPE_TRAP:
            p54_rx_trap(dev, skb);
            break;
      case P54_CONTROL_TYPE_BBP:
            break;
      case P54_CONTROL_TYPE_STAT_READBACK:
            p54_rx_stats(dev, skb);
            break;
      case P54_CONTROL_TYPE_EEPROM_READBACK:
            p54_rx_eeprom_readback(dev, skb);
            break;
      default:
            printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
                   wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
            break;
      }

      return 0;
}

/* returns zero if skb can be reused */
int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      u16 type = le16_to_cpu(*((__le16 *)skb->data));

      if (type & P54_HDR_FLAG_CONTROL)
            return p54_rx_control(dev, skb);
      else
            return p54_rx_data(dev, skb);
}
EXPORT_SYMBOL_GPL(p54_rx);

/*
 * So, the firmware is somewhat stupid and doesn't know what places in its
 * memory incoming data should go to. By poking around in the firmware, we
 * can find some unused memory to upload our packets to. However, data that we
 * want the card to TX needs to stay intact until the card has told us that
 * it is done with it. This function finds empty places we can upload to and
 * marks allocated areas as reserved if necessary. p54_rx_frame_sent or
 * p54_free_skb frees allocated areas.
 */
static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
                         struct p54_hdr *data, u32 len)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *entry;
      struct sk_buff *target_skb = NULL;
      struct ieee80211_tx_info *info;
      struct p54_tx_info *range;
      u32 last_addr = priv->rx_start;
      u32 largest_hole = 0;
      u32 target_addr = priv->rx_start;
      unsigned long flags;
      unsigned int left;
      len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;

      if (!skb)
            return -EINVAL;

      spin_lock_irqsave(&priv->tx_queue.lock, flags);

      left = skb_queue_len(&priv->tx_queue);
      if (unlikely(left >= 28)) {
            /*
             * The tx_queue is nearly full!
             * We have throttle normal data traffic, because we must
             * have a few spare slots for control frames left.
             */
            ieee80211_stop_queues(dev);
            queue_delayed_work(dev->workqueue, &priv->work,
                           msecs_to_jiffies(P54_TX_TIMEOUT));

            if (unlikely(left == 32)) {
                  /*
                   * The tx_queue is now really full.
                   *
                   * TODO: check if the device has crashed and reset it.
                   */
                  spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
                  return -ENOSPC;
            }
      }

      entry = priv->tx_queue.next;
      while (left--) {
            u32 hole_size;
            info = IEEE80211_SKB_CB(entry);
            range = (void *)info->rate_driver_data;
            hole_size = range->start_addr - last_addr;
            if (!target_skb && hole_size >= len) {
                  target_skb = entry->prev;
                  hole_size -= len;
                  target_addr = last_addr;
            }
            largest_hole = max(largest_hole, hole_size);
            last_addr = range->end_addr;
            entry = entry->next;
      }
      if (!target_skb && priv->rx_end - last_addr >= len) {
            target_skb = priv->tx_queue.prev;
            largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
            if (!skb_queue_empty(&priv->tx_queue)) {
                  info = IEEE80211_SKB_CB(target_skb);
                  range = (void *)info->rate_driver_data;
                  target_addr = range->end_addr;
            }
      } else
            largest_hole = max(largest_hole, priv->rx_end - last_addr);

      if (!target_skb) {
            spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
            ieee80211_stop_queues(dev);
            return -ENOSPC;
      }

      info = IEEE80211_SKB_CB(skb);
      range = (void *)info->rate_driver_data;
      range->start_addr = target_addr;
      range->end_addr = target_addr + len;
      __skb_queue_after(&priv->tx_queue, target_skb, skb);
      spin_unlock_irqrestore(&priv->tx_queue.lock, flags);

      if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
                     48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
            ieee80211_stop_queues(dev);

      data->req_id = cpu_to_le32(target_addr + priv->headroom);
      return 0;
}

static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev, u16 hdr_flags,
                             u16 payload_len, u16 type, gfp_t memflags)
{
      struct p54_common *priv = dev->priv;
      struct p54_hdr *hdr;
      struct sk_buff *skb;
      size_t frame_len = sizeof(*hdr) + payload_len;

      if (frame_len > P54_MAX_CTRL_FRAME_LEN)
            return NULL;

      skb = __dev_alloc_skb(priv->tx_hdr_len + frame_len, memflags);
      if (!skb)
            return NULL;
      skb_reserve(skb, priv->tx_hdr_len);

      hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
      hdr->flags = cpu_to_le16(hdr_flags);
      hdr->len = cpu_to_le16(payload_len);
      hdr->type = cpu_to_le16(type);
      hdr->tries = hdr->rts_tries = 0;

      if (p54_assign_address(dev, skb, hdr, frame_len)) {
            kfree_skb(skb);
            return NULL;
      }
      return skb;
}

int p54_read_eeprom(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      struct p54_eeprom_lm86 *eeprom_hdr;
      struct sk_buff *skb;
      size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
      int ret = -ENOMEM;
      void *eeprom = NULL;

      maxblocksize = EEPROM_READBACK_LEN;
      if (priv->fw_var >= 0x509)
            maxblocksize -= 0xc;
      else
            maxblocksize -= 0x4;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(*eeprom_hdr) +
                      maxblocksize, P54_CONTROL_TYPE_EEPROM_READBACK,
                      GFP_KERNEL);
      if (!skb)
            goto free;
      priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
      if (!priv->eeprom)
            goto free;
      eeprom = kzalloc(eeprom_size, GFP_KERNEL);
      if (!eeprom)
            goto free;

      eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
                 sizeof(*eeprom_hdr) + maxblocksize);

      while (eeprom_size) {
            blocksize = min(eeprom_size, maxblocksize);
            if (priv->fw_var < 0x509) {
                  eeprom_hdr->v1.offset = cpu_to_le16(offset);
                  eeprom_hdr->v1.len = cpu_to_le16(blocksize);
            } else {
                  eeprom_hdr->v2.offset = cpu_to_le32(offset);
                  eeprom_hdr->v2.len = cpu_to_le16(blocksize);
                  eeprom_hdr->v2.magic2 = 0xf;
                  memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4);
            }
            priv->tx(dev, skb);

            if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
                  printk(KERN_ERR "%s: device does not respond!\n",
                        wiphy_name(dev->wiphy));
                  ret = -EBUSY;
                  goto free;
              }

            memcpy(eeprom + offset, priv->eeprom, blocksize);
            offset += blocksize;
            eeprom_size -= blocksize;
      }

      ret = p54_parse_eeprom(dev, eeprom, offset);
free:
      kfree(priv->eeprom);
      priv->eeprom = NULL;
      p54_free_skb(dev, skb);
      kfree(eeprom);

      return ret;
}
EXPORT_SYMBOL_GPL(p54_read_eeprom);

static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
            bool set)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_tim *tim;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*tim),
                      P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
      tim->count = 1;
      tim->entry[0] = cpu_to_le16(set ? (sta->aid | 0x8000) : sta->aid);
      priv->tx(dev, skb);
      return 0;
}

static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_sta_unlock *sta;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*sta),
                      P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
      memcpy(sta->addr, addr, ETH_ALEN);
      priv->tx(dev, skb);
      return 0;
}

static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
                        enum sta_notify_cmd notify_cmd,
                        struct ieee80211_sta *sta)
{
      switch (notify_cmd) {
      case STA_NOTIFY_ADD:
      case STA_NOTIFY_REMOVE:
            /*
             * Notify the firmware that we don't want or we don't
             * need to buffer frames for this station anymore.
             */

            p54_sta_unlock(dev, sta->addr);
            break;
      case STA_NOTIFY_AWAKE:
            /* update the firmware's filter table */
            p54_sta_unlock(dev, sta->addr);
            break;
      default:
            break;
      }
}

static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_hdr *hdr;
      struct p54_txcancel *cancel;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*cancel),
                      P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      hdr = (void *)entry->data;
      cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
      cancel->req_id = hdr->req_id;
      priv->tx(dev, skb);
      return 0;
}

static int p54_tx_fill(struct ieee80211_hw *dev, struct sk_buff *skb,
            struct ieee80211_tx_info *info, u8 *queue, size_t *extra_len,
            u16 *flags, u16 *aid)
{
      struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
      struct p54_common *priv = dev->priv;
      int ret = 1;

      switch (priv->mode) {
      case NL80211_IFTYPE_MONITOR:
            /*
             * We have to set P54_HDR_FLAG_DATA_OUT_PROMISC for
             * every frame in promiscuous/monitor mode.
             * see STSW45x0C LMAC API - page 12.
             */
            *aid = 0;
            *flags = P54_HDR_FLAG_DATA_OUT_PROMISC;
            *queue += P54_QUEUE_DATA;
            break;
      case NL80211_IFTYPE_STATION:
            *aid = 1;
            if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
                  *queue = P54_QUEUE_MGMT;
                  ret = 0;
            } else
                  *queue += P54_QUEUE_DATA;
            break;
      case NL80211_IFTYPE_AP:
      case NL80211_IFTYPE_ADHOC:
      case NL80211_IFTYPE_MESH_POINT:
            if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
                  *aid = 0;
                  *queue = P54_QUEUE_CAB;
                  return 0;
            }

            if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
                  if (ieee80211_is_probe_resp(hdr->frame_control)) {
                        *aid = 0;
                        *queue = P54_QUEUE_MGMT;
                        *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
                               P54_HDR_FLAG_DATA_OUT_NOCANCEL;
                        return 0;
                  } else if (ieee80211_is_beacon(hdr->frame_control)) {
                        *aid = 0;

                        if (info->flags & IEEE80211_TX_CTL_INJECTED) {
                              /*
                               * Injecting beacons on top of a AP is
                               * not a good idea... nevertheless,
                               * it should be doable.
                               */

                              *queue += P54_QUEUE_DATA;
                              return 1;
                        }

                        *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
                        *queue = P54_QUEUE_BEACON;
                        *extra_len = IEEE80211_MAX_TIM_LEN;
                        return 0;
                  } else {
                        *queue = P54_QUEUE_MGMT;
                        ret = 0;
                  }
            } else
                  *queue += P54_QUEUE_DATA;

            if (info->control.sta)
                  *aid = info->control.sta->aid;

            if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
                  *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
            break;
      }
      return ret;
}

static u8 p54_convert_algo(enum ieee80211_key_alg alg)
{
      switch (alg) {
      case ALG_WEP:
            return P54_CRYPTO_WEP;
      case ALG_TKIP:
            return P54_CRYPTO_TKIPMICHAEL;
      case ALG_CCMP:
            return P54_CRYPTO_AESCCMP;
      default:
            return 0;
      }
}

static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
      struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
      struct ieee80211_tx_queue_stats *current_queue;
      struct p54_common *priv = dev->priv;
      struct p54_hdr *hdr;
      struct p54_tx_data *txhdr;
      size_t padding, len, tim_len = 0;
      int i, j, ridx, ret;
      u16 hdr_flags = 0, aid = 0;
      u8 rate, queue, crypt_offset = 0;
      u8 cts_rate = 0x20;
      u8 rc_flags;
      u8 calculated_tries[4];
      u8 nrates = 0, nremaining = 8;

      queue = skb_get_queue_mapping(skb);

      ret = p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid);
      current_queue = &priv->tx_stats[queue];
      if (unlikely((current_queue->len > current_queue->limit) && ret))
            return NETDEV_TX_BUSY;
      current_queue->len++;
      current_queue->count++;
      if ((current_queue->len == current_queue->limit) && ret)
            ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));

      padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
      len = skb->len;

      if (info->control.hw_key) {
            crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
            if (info->control.hw_key->alg == ALG_TKIP) {
                  u8 *iv = (u8 *)(skb->data + crypt_offset);
                  /*
                   * The firmware excepts that the IV has to have
                   * this special format
                   */
                  iv[1] = iv[0];
                  iv[0] = iv[2];
                  iv[2] = 0;
            }
      }

      txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
      hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));

      if (padding)
            hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
      hdr->type = cpu_to_le16(aid);
      hdr->rts_tries = info->control.rates[0].count;

      /*
       * we register the rates in perfect order, and
       * RTS/CTS won't happen on 5 GHz
       */
      cts_rate = info->control.rts_cts_rate_idx;

      memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));

      /* see how many rates got used */
      for (i = 0; i < 4; i++) {
            if (info->control.rates[i].idx < 0)
                  break;
            nrates++;
      }

      /* limit tries to 8/nrates per rate */
      for (i = 0; i < nrates; i++) {
            /*
             * The magic expression here is equivalent to 8/nrates for
             * all values that matter, but avoids division and jumps.
             * Note that nrates can only take the values 1 through 4.
             */
            calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
                                     info->control.rates[i].count);
            nremaining -= calculated_tries[i];
      }

      /* if there are tries left, distribute from back to front */
      for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
            int tmp = info->control.rates[i].count - calculated_tries[i];

            if (tmp <= 0)
                  continue;
            /* RC requested more tries at this rate */

            tmp = min_t(int, tmp, nremaining);
            calculated_tries[i] += tmp;
            nremaining -= tmp;
      }

      ridx = 0;
      for (i = 0; i < nrates && ridx < 8; i++) {
            /* we register the rates in perfect order */
            rate = info->control.rates[i].idx;
            if (info->band == IEEE80211_BAND_5GHZ)
                  rate += 4;

            /* store the count we actually calculated for TX status */
            info->control.rates[i].count = calculated_tries[i];

            rc_flags = info->control.rates[i].flags;
            if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
                  rate |= 0x10;
                  cts_rate |= 0x10;
            }
            if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
                  rate |= 0x40;
            else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
                  rate |= 0x20;
            for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
                  txhdr->rateset[ridx] = rate;
                  ridx++;
            }
      }

      if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
            hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;

      /* TODO: enable bursting */
      hdr->flags = cpu_to_le16(hdr_flags);
      hdr->tries = ridx;
      txhdr->rts_rate_idx = 0;
      if (info->control.hw_key) {
            txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
            txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
            memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
            if (info->control.hw_key->alg == ALG_TKIP) {
                  if (unlikely(skb_tailroom(skb) < 12))
                        goto err;
                  /* reserve space for the MIC key */
                  len += 8;
                  memcpy(skb_put(skb, 8), &(info->control.hw_key->key
                        [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
            }
            /* reserve some space for ICV */
            len += info->control.hw_key->icv_len;
            memset(skb_put(skb, info->control.hw_key->icv_len), 0,
                   info->control.hw_key->icv_len);
      } else {
            txhdr->key_type = 0;
            txhdr->key_len = 0;
      }
      txhdr->crypt_offset = crypt_offset;
      txhdr->hw_queue = queue;
      txhdr->backlog = current_queue->len;
      memset(txhdr->durations, 0, sizeof(txhdr->durations));
      txhdr->tx_antenna = ((info->antenna_sel_tx == 0) ?
            2 : info->antenna_sel_tx - 1) & priv->tx_diversity_mask;
      if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
            txhdr->longbow.cts_rate = cts_rate;
            txhdr->longbow.output_power = cpu_to_le16(priv->output_power);
      } else {
            txhdr->normal.output_power = priv->output_power;
            txhdr->normal.cts_rate = cts_rate;
      }
      if (padding)
            txhdr->align[0] = padding;

      hdr->len = cpu_to_le16(len);
      /* modifies skb->cb and with it info, so must be last! */
      if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len)))
            goto err;
      priv->tx(dev, skb);

      queue_delayed_work(dev->workqueue, &priv->work,
                     msecs_to_jiffies(P54_TX_FRAME_LIFETIME));

      return NETDEV_TX_OK;

 err:
      skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
      current_queue->len--;
      current_queue->count--;
      return NETDEV_TX_BUSY;
}

static int p54_setup_mac(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_setup_mac *setup;
      u16 mode;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup),
                      P54_CONTROL_TYPE_SETUP, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
      if (dev->conf.radio_enabled) {
            switch (priv->mode) {
            case NL80211_IFTYPE_STATION:
                  mode = P54_FILTER_TYPE_STATION;
                  break;
            case NL80211_IFTYPE_AP:
                  mode = P54_FILTER_TYPE_AP;
                  break;
            case NL80211_IFTYPE_ADHOC:
            case NL80211_IFTYPE_MESH_POINT:
                  mode = P54_FILTER_TYPE_IBSS;
                  break;
            case NL80211_IFTYPE_MONITOR:
                  mode = P54_FILTER_TYPE_PROMISCUOUS;
                  break;
            default:
                  mode = P54_FILTER_TYPE_HIBERNATE;
                  break;
            }

            /*
             * "TRANSPARENT and PROMISCUOUS are mutually exclusive"
             * STSW45X0C LMAC API - page 12
             */
            if (((priv->filter_flags & FIF_PROMISC_IN_BSS) ||
                 (priv->filter_flags & FIF_OTHER_BSS)) &&
                (mode != P54_FILTER_TYPE_PROMISCUOUS))
                  mode |= P54_FILTER_TYPE_TRANSPARENT;
      } else
            mode = P54_FILTER_TYPE_HIBERNATE;

      setup->mac_mode = cpu_to_le16(mode);
      memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
      memcpy(setup->bssid, priv->bssid, ETH_ALEN);
      setup->rx_antenna = 2 & priv->rx_diversity_mask; /* automatic */
      setup->rx_align = 0;
      if (priv->fw_var < 0x500) {
            setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
            memset(setup->v1.rts_rates, 0, 8);
            setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
            setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
            setup->v1.rxhw = cpu_to_le16(priv->rxhw);
            setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
            setup->v1.unalloc0 = cpu_to_le16(0);
      } else {
            setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
            setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
            setup->v2.rxhw = cpu_to_le16(priv->rxhw);
            setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
            setup->v2.truncate = cpu_to_le16(48896);
            setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
            setup->v2.sbss_offset = 0;
            setup->v2.mcast_window = 0;
            setup->v2.rx_rssi_threshold = 0;
            setup->v2.rx_ed_threshold = 0;
            setup->v2.ref_clock = cpu_to_le32(644245094);
            setup->v2.lpf_bandwidth = cpu_to_le16(65535);
            setup->v2.osc_start_delay = cpu_to_le16(65535);
      }
      priv->tx(dev, skb);
      return 0;
}

static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_hdr *hdr;
      struct p54_scan_head *head;
      struct p54_iq_autocal_entry *iq_autocal;
      union p54_scan_body_union *body;
      struct p54_scan_tail_rate *rate;
      struct pda_rssi_cal_entry *rssi;
      unsigned int i;
      void *entry;
      int band = dev->conf.channel->band;
      __le16 freq = cpu_to_le16(dev->conf.channel->center_freq);

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*head) +
                      2 + sizeof(*iq_autocal) + sizeof(*body) +
                      sizeof(*rate) + 2 * sizeof(*rssi),
                      P54_CONTROL_TYPE_SCAN, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      head = (struct p54_scan_head *) skb_put(skb, sizeof(*head));
      memset(head->scan_params, 0, sizeof(head->scan_params));
      head->mode = cpu_to_le16(mode);
      head->dwell = cpu_to_le16(dwell);
      head->freq = freq;

      if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
            __le16 *pa_power_points = (__le16 *) skb_put(skb, 2);
            *pa_power_points = cpu_to_le16(0x0c);
      }

      iq_autocal = (void *) skb_put(skb, sizeof(*iq_autocal));
      for (i = 0; i < priv->iq_autocal_len; i++) {
            if (priv->iq_autocal[i].freq != freq)
                  continue;

            memcpy(iq_autocal, &priv->iq_autocal[i].params,
                   sizeof(struct p54_iq_autocal_entry));
            break;
      }
      if (i == priv->iq_autocal_len)
            goto err;

      if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW)
            body = (void *) skb_put(skb, sizeof(body->longbow));
      else
            body = (void *) skb_put(skb, sizeof(body->normal));

      for (i = 0; i < priv->output_limit->entries; i++) {
            __le16 *entry_freq = (void *) (priv->output_limit->data +
                             priv->output_limit->entry_size * i);

            if (*entry_freq != freq)
                  continue;

            if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
                  memcpy(&body->longbow.power_limits,
                         (void *) entry_freq + sizeof(__le16),
                         priv->output_limit->entry_size);
            } else {
                  struct pda_channel_output_limit *limits =
                         (void *) entry_freq;

                  body->normal.val_barker = 0x38;
                  body->normal.val_bpsk = body->normal.dup_bpsk =
                        limits->val_bpsk;
                  body->normal.val_qpsk = body->normal.dup_qpsk =
                        limits->val_qpsk;
                  body->normal.val_16qam = body->normal.dup_16qam =
                        limits->val_16qam;
                  body->normal.val_64qam = body->normal.dup_64qam =
                        limits->val_64qam;
            }
            break;
      }
      if (i == priv->output_limit->entries)
            goto err;

      entry = (void *)(priv->curve_data->data + priv->curve_data->offset);
      for (i = 0; i < priv->curve_data->entries; i++) {
            if (*((__le16 *)entry) != freq) {
                  entry += priv->curve_data->entry_size;
                  continue;
            }

            if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
                  memcpy(&body->longbow.curve_data,
                        (void *) entry + sizeof(__le16),
                        priv->curve_data->entry_size);
            } else {
                  struct p54_scan_body *chan = &body->normal;
                  struct pda_pa_curve_data *curve_data =
                        (void *) priv->curve_data->data;

                  entry += sizeof(__le16);
                  chan->pa_points_per_curve = 8;
                  memset(chan->curve_data, 0, sizeof(*chan->curve_data));
                  memcpy(chan->curve_data, entry,
                         sizeof(struct p54_pa_curve_data_sample) *
                         min((u8)8, curve_data->points_per_channel));
            }
            break;
      }
      if (i == priv->curve_data->entries)
            goto err;

      if ((priv->fw_var >= 0x500) && (priv->fw_var < 0x509)) {
            rate = (void *) skb_put(skb, sizeof(*rate));
            rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
            for (i = 0; i < sizeof(rate->rts_rates); i++)
                  rate->rts_rates[i] = i;
      }

      rssi = (struct pda_rssi_cal_entry *) skb_put(skb, sizeof(*rssi));
      rssi->mul = cpu_to_le16(priv->rssical_db[band].mul);
      rssi->add = cpu_to_le16(priv->rssical_db[band].add);
      if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
            /* Longbow frontend needs ever more */
            rssi = (void *) skb_put(skb, sizeof(*rssi));
            rssi->mul = cpu_to_le16(priv->rssical_db[band].longbow_unkn);
            rssi->add = cpu_to_le16(priv->rssical_db[band].longbow_unk2);
      }

      if (priv->fw_var >= 0x509) {
            rate = (void *) skb_put(skb, sizeof(*rate));
            rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
            for (i = 0; i < sizeof(rate->rts_rates); i++)
                  rate->rts_rates[i] = i;
      }

      hdr = (struct p54_hdr *) skb->data;
      hdr->len = cpu_to_le16(skb->len - sizeof(*hdr));

      priv->tx(dev, skb);
      return 0;

 err:
      printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
      p54_free_skb(dev, skb);
      return -EINVAL;
}

static int p54_set_leds(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_led *led;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led),
                      P54_CONTROL_TYPE_LED, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      led = (struct p54_led *) skb_put(skb, sizeof(*led));
      led->flags = cpu_to_le16(0x0003);
      led->mask[0] = led->mask[1] = cpu_to_le16(priv->softled_state);
      led->delay[0] = cpu_to_le16(1);
      led->delay[1] = cpu_to_le16(0);
      priv->tx(dev, skb);
      return 0;
}

#define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)  \
do {                                            \
      queue.aifs = cpu_to_le16(ai_fs);                \
      queue.cwmin = cpu_to_le16(cw_min);              \
      queue.cwmax = cpu_to_le16(cw_max);              \
      queue.txop = cpu_to_le16(_txop);                \
} while(0)

static int p54_set_edcf(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_edcf *edcf;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf),
                      P54_CONTROL_TYPE_DCFINIT, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
      if (priv->use_short_slot) {
            edcf->slottime = 9;
            edcf->sifs = 0x10;
            edcf->eofpad = 0x00;
      } else {
            edcf->slottime = 20;
            edcf->sifs = 0x0a;
            edcf->eofpad = 0x06;
      }
      /* (see prism54/isl_oid.h for further details) */
      edcf->frameburst = cpu_to_le16(0);
      edcf->round_trip_delay = cpu_to_le16(0);
      edcf->flags = 0;
      memset(edcf->mapping, 0, sizeof(edcf->mapping));
      memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
      priv->tx(dev, skb);
      return 0;
}

static int p54_set_ps(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_psm *psm;
      u16 mode;
      int i;

      if (dev->conf.flags & IEEE80211_CONF_PS)
            mode = P54_PSM | P54_PSM_BEACON_TIMEOUT | P54_PSM_DTIM |
                   P54_PSM_CHECKSUM | P54_PSM_MCBC;
      else
            mode = P54_PSM_CAM;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*psm),
                      P54_CONTROL_TYPE_PSM, GFP_ATOMIC);
      if (!skb)
            return -ENOMEM;

      psm = (struct p54_psm *)skb_put(skb, sizeof(*psm));
      psm->mode = cpu_to_le16(mode);
      psm->aid = cpu_to_le16(priv->aid);
      for (i = 0; i < ARRAY_SIZE(psm->intervals); i++) {
            psm->intervals[i].interval =
                  cpu_to_le16(dev->conf.listen_interval);
            psm->intervals[i].periods = cpu_to_le16(1);
      }

      psm->beacon_rssi_skip_max = 200;
      psm->rssi_delta_threshold = 0;
      psm->nr = 10;
      psm->exclude[0] = 0;

      priv->tx(dev, skb);

      return 0;
}

static int p54_beacon_tim(struct sk_buff *skb)
{
      /*
       * the good excuse for this mess is ... the firmware.
       * The dummy TIM MUST be at the end of the beacon frame,
       * because it'll be overwritten!
       */

      struct ieee80211_mgmt *mgmt = (void *)skb->data;
      u8 *pos, *end;

      if (skb->len <= sizeof(mgmt))
            return -EINVAL;

      pos = (u8 *)mgmt->u.beacon.variable;
      end = skb->data + skb->len;
      while (pos < end) {
            if (pos + 2 + pos[1] > end)
                  return -EINVAL;

            if (pos[0] == WLAN_EID_TIM) {
                  u8 dtim_len = pos[1];
                  u8 dtim_period = pos[3];
                  u8 *next = pos + 2 + dtim_len;

                  if (dtim_len < 3)
                        return -EINVAL;

                  memmove(pos, next, end - next);

                  if (dtim_len > 3)
                        skb_trim(skb, skb->len - (dtim_len - 3));

                  pos = end - (dtim_len + 2);

                  /* add the dummy at the end */
                  pos[0] = WLAN_EID_TIM;
                  pos[1] = 3;
                  pos[2] = 0;
                  pos[3] = dtim_period;
                  pos[4] = 0;
                  return 0;
            }
            pos += 2 + pos[1];
      }
      return 0;
}

static int p54_beacon_update(struct ieee80211_hw *dev,
                  struct ieee80211_vif *vif)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *beacon;
      int ret;

      if (priv->cached_beacon) {
            p54_tx_cancel(dev, priv->cached_beacon);
            /* wait for the last beacon the be freed */
            msleep(10);
      }

      beacon = ieee80211_beacon_get(dev, vif);
      if (!beacon)
            return -ENOMEM;
      ret = p54_beacon_tim(beacon);
      if (ret)
            return ret;
      ret = p54_tx(dev, beacon);
      if (ret)
            return ret;
      priv->cached_beacon = beacon;
      priv->tsf_high32 = 0;
      priv->tsf_low32 = 0;

      return 0;
}

static int p54_start(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      int err;

      mutex_lock(&priv->conf_mutex);
      err = priv->open(dev);
      if (err)
            goto out;
      P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
      P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
      P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
      P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
      err = p54_set_edcf(dev);
      if (err)
            goto out;

      memset(priv->bssid, ~0, ETH_ALEN);
      priv->mode = NL80211_IFTYPE_MONITOR;
      err = p54_setup_mac(dev);
      if (err) {
            priv->mode = NL80211_IFTYPE_UNSPECIFIED;
            goto out;
      }

      queue_delayed_work(dev->workqueue, &priv->work, 0);

      priv->softled_state = 0;
      err = p54_set_leds(dev);

out:
      mutex_unlock(&priv->conf_mutex);
      return err;
}

static void p54_stop(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;

      mutex_lock(&priv->conf_mutex);
      priv->mode = NL80211_IFTYPE_UNSPECIFIED;
      priv->softled_state = 0;
      p54_set_leds(dev);

#ifdef CONFIG_P54_LEDS
      cancel_delayed_work_sync(&priv->led_work);
#endif /* CONFIG_P54_LEDS */
      cancel_delayed_work_sync(&priv->work);
      if (priv->cached_beacon)
            p54_tx_cancel(dev, priv->cached_beacon);

      priv->stop(dev);
      while ((skb = skb_dequeue(&priv->tx_queue)))
            kfree_skb(skb);
      priv->cached_beacon = NULL;
      priv->tsf_high32 = priv->tsf_low32 = 0;
      mutex_unlock(&priv->conf_mutex);
}

static int p54_add_interface(struct ieee80211_hw *dev,
                       struct ieee80211_if_init_conf *conf)
{
      struct p54_common *priv = dev->priv;

      mutex_lock(&priv->conf_mutex);
      if (priv->mode != NL80211_IFTYPE_MONITOR) {
            mutex_unlock(&priv->conf_mutex);
            return -EOPNOTSUPP;
      }

      priv->vif = conf->vif;

      switch (conf->type) {
      case NL80211_IFTYPE_STATION:
      case NL80211_IFTYPE_ADHOC:
      case NL80211_IFTYPE_AP:
      case NL80211_IFTYPE_MESH_POINT:
            priv->mode = conf->type;
            break;
      default:
            mutex_unlock(&priv->conf_mutex);
            return -EOPNOTSUPP;
      }

      memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
      p54_setup_mac(dev);
      mutex_unlock(&priv->conf_mutex);
      return 0;
}

static void p54_remove_interface(struct ieee80211_hw *dev,
                         struct ieee80211_if_init_conf *conf)
{
      struct p54_common *priv = dev->priv;

      mutex_lock(&priv->conf_mutex);
      priv->vif = NULL;
      if (priv->cached_beacon)
            p54_tx_cancel(dev, priv->cached_beacon);
      priv->mode = NL80211_IFTYPE_MONITOR;
      memset(priv->mac_addr, 0, ETH_ALEN);
      memset(priv->bssid, 0, ETH_ALEN);
      p54_setup_mac(dev);
      mutex_unlock(&priv->conf_mutex);
}

static int p54_config(struct ieee80211_hw *dev, u32 changed)
{
      int ret = 0;
      struct p54_common *priv = dev->priv;
      struct ieee80211_conf *conf = &dev->conf;

      mutex_lock(&priv->conf_mutex);
      if (changed & IEEE80211_CONF_CHANGE_POWER)
            priv->output_power = conf->power_level << 2;
      if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
            ret = p54_setup_mac(dev);
            if (ret)
                  goto out;
      }
      if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
            ret = p54_scan(dev, P54_SCAN_EXIT, 0);
            if (ret)
                  goto out;
      }
      if (changed & IEEE80211_CONF_CHANGE_PS) {
            ret = p54_set_ps(dev);
            if (ret)
                  goto out;
      }

out:
      mutex_unlock(&priv->conf_mutex);
      return ret;
}

static void p54_configure_filter(struct ieee80211_hw *dev,
                         unsigned int changed_flags,
                         unsigned int *total_flags,
                         int mc_count, struct dev_mc_list *mclist)
{
      struct p54_common *priv = dev->priv;

      *total_flags &= FIF_PROMISC_IN_BSS |
                  FIF_OTHER_BSS;

      priv->filter_flags = *total_flags;

      if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
            p54_setup_mac(dev);
}

static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
                   const struct ieee80211_tx_queue_params *params)
{
      struct p54_common *priv = dev->priv;
      int ret;

      mutex_lock(&priv->conf_mutex);
      if ((params) && !(queue > 4)) {
            P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
                  params->cw_min, params->cw_max, params->txop);
            ret = p54_set_edcf(dev);
      } else
            ret = -EINVAL;
      mutex_unlock(&priv->conf_mutex);
      return ret;
}

static int p54_init_xbow_synth(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_xbow_synth *xbow;

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow),
                      P54_CONTROL_TYPE_XBOW_SYNTH_CFG, GFP_KERNEL);
      if (!skb)
            return -ENOMEM;

      xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
      xbow->magic1 = cpu_to_le16(0x1);
      xbow->magic2 = cpu_to_le16(0x2);
      xbow->freq = cpu_to_le16(5390);
      memset(xbow->padding, 0, sizeof(xbow->padding));
      priv->tx(dev, skb);
      return 0;
}

static void p54_work(struct work_struct *work)
{
      struct p54_common *priv = container_of(work, struct p54_common,
                                     work.work);
      struct ieee80211_hw *dev = priv->hw;
      struct sk_buff *skb;

      if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
            return ;

      /*
       * TODO: walk through tx_queue and do the following tasks
       *    1. initiate bursts.
       *      2. cancel stuck frames / reset the device if necessary.
       */

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL,
                      sizeof(struct p54_statistics),
                      P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
      if (!skb)
            return ;

      priv->tx(dev, skb);
}

static int p54_get_stats(struct ieee80211_hw *dev,
                   struct ieee80211_low_level_stats *stats)
{
      struct p54_common *priv = dev->priv;

      memcpy(stats, &priv->stats, sizeof(*stats));
      return 0;
}

static int p54_get_tx_stats(struct ieee80211_hw *dev,
                      struct ieee80211_tx_queue_stats *stats)
{
      struct p54_common *priv = dev->priv;

      memcpy(stats, &priv->tx_stats[P54_QUEUE_DATA],
             sizeof(stats[0]) * dev->queues);
      return 0;
}

static void p54_bss_info_changed(struct ieee80211_hw *dev,
                         struct ieee80211_vif *vif,
                         struct ieee80211_bss_conf *info,
                         u32 changed)
{
      struct p54_common *priv = dev->priv;
      int ret;

      mutex_lock(&priv->conf_mutex);
      if (changed & BSS_CHANGED_BSSID) {
            memcpy(priv->bssid, info->bssid, ETH_ALEN);
            ret = p54_setup_mac(dev);
            if (ret)
                  goto out;
      }

      if (changed & BSS_CHANGED_BEACON) {
            ret = p54_scan(dev, P54_SCAN_EXIT, 0);
            if (ret)
                  goto out;
            ret = p54_setup_mac(dev);
            if (ret)
                  goto out;
            ret = p54_beacon_update(dev, vif);
            if (ret)
                  goto out;
      }
      /* XXX: this mimics having two callbacks... clean up */
 out:
      mutex_unlock(&priv->conf_mutex);

      if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
            priv->use_short_slot = info->use_short_slot;
            p54_set_edcf(dev);
      }
      if (changed & BSS_CHANGED_BASIC_RATES) {
            if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
                  priv->basic_rate_mask = (info->basic_rates << 4);
            else
                  priv->basic_rate_mask = info->basic_rates;
            p54_setup_mac(dev);
            if (priv->fw_var >= 0x500)
                  p54_scan(dev, P54_SCAN_EXIT, 0);
      }
      if (changed & BSS_CHANGED_ASSOC) {
            if (info->assoc) {
                  priv->aid = info->aid;
                  priv->wakeup_timer = info->beacon_int *
                                   info->dtim_period * 5;
                  p54_setup_mac(dev);
            }
      }
}

static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
                   struct ieee80211_vif *vif, struct ieee80211_sta *sta,
                   struct ieee80211_key_conf *key)
{
      struct p54_common *priv = dev->priv;
      struct sk_buff *skb;
      struct p54_keycache *rxkey;
      int slot, ret = 0;
      u8 algo = 0;

      if (modparam_nohwcrypt)
            return -EOPNOTSUPP;

      mutex_lock(&priv->conf_mutex);
      if (cmd == SET_KEY) {
            switch (key->alg) {
            case ALG_TKIP:
                  if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
                        BR_DESC_PRIV_CAP_TKIP))) {
                        ret = -EOPNOTSUPP;
                        goto out_unlock;
                  }
                  key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
                  algo = P54_CRYPTO_TKIPMICHAEL;
                  break;
            case ALG_WEP:
                  if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
                        ret = -EOPNOTSUPP;
                        goto out_unlock;
                  }
                  key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
                  algo = P54_CRYPTO_WEP;
                  break;
            case ALG_CCMP:
                  if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
                        ret = -EOPNOTSUPP;
                        goto out_unlock;
                  }
                  key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
                  algo = P54_CRYPTO_AESCCMP;
                  break;
            default:
                  ret = -EOPNOTSUPP;
                  goto out_unlock;
            }
            slot = bitmap_find_free_region(priv->used_rxkeys,
                                     priv->rx_keycache_size, 0);

            if (slot < 0) {
                  /*
                   * The device supports the choosen algorithm, but the
                   * firmware does not provide enough key slots to store
                   * all of them.
                   * But encryption offload for outgoing frames is always
                   * possible, so we just pretend that the upload was
                   * successful and do the decryption in software.
                   */

                  /* mark the key as invalid. */
                  key->hw_key_idx = 0xff;
                  goto out_unlock;
            }
      } else {
            slot = key->hw_key_idx;

            if (slot == 0xff) {
                  /* This key was not uploaded into the rx key cache. */

                  goto out_unlock;
            }

            bitmap_release_region(priv->used_rxkeys, slot, 0);
            algo = 0;
      }

      skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey),
                      P54_CONTROL_TYPE_RX_KEYCACHE, GFP_KERNEL);
      if (!skb) {
            bitmap_release_region(priv->used_rxkeys, slot, 0);
            ret = -ENOSPC;
            goto out_unlock;
      }

      rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey));
      rxkey->entry = slot;
      rxkey->key_id = key->keyidx;
      rxkey->key_type = algo;
      if (sta)
            memcpy(rxkey->mac, sta->addr, ETH_ALEN);
      else
            memset(rxkey->mac, ~0, ETH_ALEN);
      if (key->alg != ALG_TKIP) {
            rxkey->key_len = min((u8)16, key->keylen);
            memcpy(rxkey->key, key->key, rxkey->key_len);
      } else {
            rxkey->key_len = 24;
            memcpy(rxkey->key, key->key, 16);
            memcpy(&(rxkey->key[16]), &(key->key
                  [NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8);
      }

      priv->tx(dev, skb);
      key->hw_key_idx = slot;

out_unlock:
      mutex_unlock(&priv->conf_mutex);
      return ret;
}

#ifdef CONFIG_P54_LEDS
static void p54_update_leds(struct work_struct *work)
{
      struct p54_common *priv = container_of(work, struct p54_common,
                                     led_work.work);
      int err, i, tmp, blink_delay = 400;
      bool rerun = false;

      /* Don't toggle the LED, when the device is down. */
      if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
            return ;

      for (i = 0; i < ARRAY_SIZE(priv->leds); i++)
            if (priv->leds[i].toggled) {
                  priv->softled_state |= BIT(i);

                  tmp = 70 + 200 / (priv->leds[i].toggled);
                  if (tmp < blink_delay)
                        blink_delay = tmp;

                  if (priv->leds[i].led_dev.brightness == LED_OFF)
                        rerun = true;

                  priv->leds[i].toggled =
                        !!priv->leds[i].led_dev.brightness;
            } else
                  priv->softled_state &= ~BIT(i);

      err = p54_set_leds(priv->hw);
      if (err && net_ratelimit())
            printk(KERN_ERR "%s: failed to update LEDs.\n",
                  wiphy_name(priv->hw->wiphy));

      if (rerun)
            queue_delayed_work(priv->hw->workqueue, &priv->led_work,
                  msecs_to_jiffies(blink_delay));
}

static void p54_led_brightness_set(struct led_classdev *led_dev,
                           enum led_brightness brightness)
{
      struct p54_led_dev *led = container_of(led_dev, struct p54_led_dev,
                                     led_dev);
      struct ieee80211_hw *dev = led->hw_dev;
      struct p54_common *priv = dev->priv;

      if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
            return ;

      if (brightness) {
            led->toggled++;
            queue_delayed_work(priv->hw->workqueue, &priv->led_work,
                           HZ/10);
      }
}

static int p54_register_led(struct ieee80211_hw *dev,
                      unsigned int led_index,
                      char *name, char *trigger)
{
      struct p54_common *priv = dev->priv;
      struct p54_led_dev *led = &priv->leds[led_index];
      int err;

      if (led->registered)
            return -EEXIST;

      snprintf(led->name, sizeof(led->name), "p54-%s::%s",
             wiphy_name(dev->wiphy), name);
      led->hw_dev = dev;
      led->index = led_index;
      led->led_dev.name = led->name;
      led->led_dev.default_trigger = trigger;
      led->led_dev.brightness_set = p54_led_brightness_set;

      err = led_classdev_register(wiphy_dev(dev->wiphy), &led->led_dev);
      if (err)
            printk(KERN_ERR "%s: Failed to register %s LED.\n",
                  wiphy_name(dev->wiphy), name);
      else
            led->registered = 1;

      return err;
}

static int p54_init_leds(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      int err;

      /*
       * TODO:
       * Figure out if the EEPROM contains some hints about the number
       * of available/programmable LEDs of the device.
       */

      INIT_DELAYED_WORK(&priv->led_work, p54_update_leds);

      err = p54_register_led(dev, 0, "assoc",
                         ieee80211_get_assoc_led_name(dev));
      if (err)
            return err;

      err = p54_register_led(dev, 1, "tx",
                         ieee80211_get_tx_led_name(dev));
      if (err)
            return err;

      err = p54_register_led(dev, 2, "rx",
                         ieee80211_get_rx_led_name(dev));
      if (err)
            return err;

      err = p54_register_led(dev, 3, "radio",
                         ieee80211_get_radio_led_name(dev));
      if (err)
            return err;

      err = p54_set_leds(dev);
      return err;
}

static void p54_unregister_leds(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      int i;

      for (i = 0; i < ARRAY_SIZE(priv->leds); i++)
            if (priv->leds[i].registered)
                  led_classdev_unregister(&priv->leds[i].led_dev);
}
#endif /* CONFIG_P54_LEDS */

static const struct ieee80211_ops p54_ops = {
      .tx               = p54_tx,
      .start                  = p54_start,
      .stop             = p54_stop,
      .add_interface          = p54_add_interface,
      .remove_interface = p54_remove_interface,
      .set_tim          = p54_set_tim,
      .sta_notify       = p54_sta_notify,
      .set_key          = p54_set_key,
      .config                 = p54_config,
      .bss_info_changed = p54_bss_info_changed,
      .configure_filter = p54_configure_filter,
      .conf_tx          = p54_conf_tx,
      .get_stats        = p54_get_stats,
      .get_tx_stats           = p54_get_tx_stats
};

struct ieee80211_hw *p54_init_common(size_t priv_data_len)
{
      struct ieee80211_hw *dev;
      struct p54_common *priv;

      dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
      if (!dev)
            return NULL;

      priv = dev->priv;
      priv->hw = dev;
      priv->mode = NL80211_IFTYPE_UNSPECIFIED;
      priv->basic_rate_mask = 0x15f;
      skb_queue_head_init(&priv->tx_queue);
      dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
                 IEEE80211_HW_SIGNAL_DBM |
                 IEEE80211_HW_NOISE_DBM;

      dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
                              BIT(NL80211_IFTYPE_ADHOC) |
                              BIT(NL80211_IFTYPE_AP) |
                              BIT(NL80211_IFTYPE_MESH_POINT);

      dev->channel_change_time = 1000;    /* TODO: find actual value */
      priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
      priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
      priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
      priv->tx_stats[P54_QUEUE_CAB].limit = 3;
      priv->tx_stats[P54_QUEUE_DATA].limit = 5;
      dev->queues = 1;
      priv->noise = -94;
      /*
       * We support at most 8 tries no matter which rate they're at,
       * we cannot support max_rates * max_rate_tries as we set it
       * here, but setting it correctly to 4/2 or so would limit us
       * artificially if the RC algorithm wants just two rates, so
       * let's say 4/7, we'll redistribute it at TX time, see the
       * comments there.
       */
      dev->max_rates = 4;
      dev->max_rate_tries = 7;
      dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
                         sizeof(struct p54_tx_data);

      mutex_init(&priv->conf_mutex);
      init_completion(&priv->eeprom_comp);
      INIT_DELAYED_WORK(&priv->work, p54_work);

      return dev;
}
EXPORT_SYMBOL_GPL(p54_init_common);

int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
{
      int err;

      err = ieee80211_register_hw(dev);
      if (err) {
            dev_err(pdev, "Cannot register device (%d).\n", err);
            return err;
      }

#ifdef CONFIG_P54_LEDS
      err = p54_init_leds(dev);
      if (err)
            return err;
#endif /* CONFIG_P54_LEDS */

      dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
      return 0;
}
EXPORT_SYMBOL_GPL(p54_register_common);

void p54_free_common(struct ieee80211_hw *dev)
{
      struct p54_common *priv = dev->priv;
      kfree(priv->iq_autocal);
      kfree(priv->output_limit);
      kfree(priv->curve_data);
      kfree(priv->used_rxkeys);

#ifdef CONFIG_P54_LEDS
      p54_unregister_leds(dev);
#endif /* CONFIG_P54_LEDS */
}
EXPORT_SYMBOL_GPL(p54_free_common);

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