Initial import

1 files changed, 869 insertions, 0 deletions

diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c
new file mode 100644
index 000000000..e79674f73
--- /dev/null
+++ b/drivers/net/wireless/p54/main.c
@@ -0,0 +1,869 @@
+/*
+ * mac80211 glue code for mac80211 Prism54 drivers
+ *
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2007-2009, 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/slab.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+
+#include <net/mac80211.h>
+
+#include "p54.h"
+#include "lmac.h"
+
+static bool 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 int p54_sta_add_remove(struct ieee80211_hw *hw,
+			      struct ieee80211_vif *vif,
+			      struct ieee80211_sta *sta)
+{
+	struct p54_common *priv = hw->priv;
+
+	/*
+	 * Notify the firmware that we don't want or we don't
+	 * need to buffer frames for this station anymore.
+	 */
+
+	p54_sta_unlock(priv, sta->addr);
+
+	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)
+{
+	struct p54_common *priv = dev->priv;
+
+	switch (notify_cmd) {
+	case STA_NOTIFY_AWAKE:
+		/* update the firmware's filter table */
+		p54_sta_unlock(priv, sta->addr);
+		break;
+	default:
+		break;
+	}
+}
+
+static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
+			bool set)
+{
+	struct p54_common *priv = dev->priv;
+
+	return p54_update_beacon_tim(priv, sta->aid, set);
+}
+
+u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
+{
+	struct ieee80211_mgmt *mgmt = (void *)skb->data;
+	u8 *pos, *end;
+
+	if (skb->len <= sizeof(mgmt))
+		return NULL;
+
+	pos = (u8 *)mgmt->u.beacon.variable;
+	end = skb->data + skb->len;
+	while (pos < end) {
+		if (pos + 2 + pos[1] > end)
+			return NULL;
+
+		if (pos[0] == ie)
+			return pos;
+
+		pos += 2 + pos[1];
+	}
+	return NULL;
+}
+
+static int p54_beacon_format_ie_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!
+	 */
+	u8 *tim;
+	u8 dtim_len;
+	u8 dtim_period;
+	u8 *next;
+
+	tim = p54_find_ie(skb, WLAN_EID_TIM);
+	if (!tim)
+		return 0;
+
+	dtim_len = tim[1];
+	dtim_period = tim[3];
+	next = tim + 2 + dtim_len;
+
+	if (dtim_len < 3)
+		return -EINVAL;
+
+	memmove(tim, next, skb_tail_pointer(skb) - next);
+	tim = skb_tail_pointer(skb) - (dtim_len + 2);
+
+	/* add the dummy at the end */
+	tim[0] = WLAN_EID_TIM;
+	tim[1] = 3;
+	tim[2] = 0;
+	tim[3] = dtim_period;
+	tim[4] = 0;
+
+	if (dtim_len > 3)
+		skb_trim(skb, skb->len - (dtim_len - 3));
+
+	return 0;
+}
+
+static int p54_beacon_update(struct p54_common *priv,
+			struct ieee80211_vif *vif)
+{
+	struct ieee80211_tx_control control = { };
+	struct sk_buff *beacon;
+	int ret;
+
+	beacon = ieee80211_beacon_get(priv->hw, vif);
+	if (!beacon)
+		return -ENOMEM;
+	ret = p54_beacon_format_ie_tim(beacon);
+	if (ret)
+		return ret;
+
+	/*
+	 * During operation, the firmware takes care of beaconing.
+	 * The driver only needs to upload a new beacon template, once
+	 * the template was changed by the stack or userspace.
+	 *
+	 * LMAC API 3.2.2 also specifies that the driver does not need
+	 * to cancel the old beacon template by hand, instead the firmware
+	 * will release the previous one through the feedback mechanism.
+	 */
+	p54_tx_80211(priv->hw, &control, 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(priv);
+	if (err)
+		goto out;
+
+	eth_broadcast_addr(priv->bssid);
+	priv->mode = NL80211_IFTYPE_MONITOR;
+	err = p54_setup_mac(priv);
+	if (err) {
+		priv->mode = NL80211_IFTYPE_UNSPECIFIED;
+		goto out;
+	}
+
+	ieee80211_queue_delayed_work(dev, &priv->work, 0);
+
+	priv->softled_state = 0;
+	err = p54_set_leds(priv);
+
+out:
+	mutex_unlock(&priv->conf_mutex);
+	return err;
+}
+
+static void p54_stop(struct ieee80211_hw *dev)
+{
+	struct p54_common *priv = dev->priv;
+	int i;
+
+	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
+	priv->softled_state = 0;
+	cancel_delayed_work_sync(&priv->work);
+	mutex_lock(&priv->conf_mutex);
+	p54_set_leds(priv);
+	priv->stop(dev);
+	skb_queue_purge(&priv->tx_pending);
+	skb_queue_purge(&priv->tx_queue);
+	for (i = 0; i < P54_QUEUE_NUM; i++) {
+		priv->tx_stats[i].count = 0;
+		priv->tx_stats[i].len = 0;
+	}
+
+	priv->beacon_req_id = cpu_to_le32(0);
+	priv->tsf_high32 = priv->tsf_low32 = 0;
+	mutex_unlock(&priv->conf_mutex);
+}
+
+static int p54_add_interface(struct ieee80211_hw *dev,
+			     struct ieee80211_vif *vif)
+{
+	struct p54_common *priv = dev->priv;
+	int err;
+
+	vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
+
+	mutex_lock(&priv->conf_mutex);
+	if (priv->mode != NL80211_IFTYPE_MONITOR) {
+		mutex_unlock(&priv->conf_mutex);
+		return -EOPNOTSUPP;
+	}
+
+	priv->vif = vif;
+
+	switch (vif->type) {
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_ADHOC:
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_MESH_POINT:
+		priv->mode = vif->type;
+		break;
+	default:
+		mutex_unlock(&priv->conf_mutex);
+		return -EOPNOTSUPP;
+	}
+
+	memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
+	err = p54_setup_mac(priv);
+	mutex_unlock(&priv->conf_mutex);
+	return err;
+}
+
+static void p54_remove_interface(struct ieee80211_hw *dev,
+				 struct ieee80211_vif *vif)
+{
+	struct p54_common *priv = dev->priv;
+
+	mutex_lock(&priv->conf_mutex);
+	priv->vif = NULL;
+
+	/*
+	 * LMAC API 3.2.2 states that any active beacon template must be
+	 * canceled by the driver before attempting a mode transition.
+	 */
+	if (le32_to_cpu(priv->beacon_req_id) != 0) {
+		p54_tx_cancel(priv, priv->beacon_req_id);
+		wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
+	}
+	priv->mode = NL80211_IFTYPE_MONITOR;
+	eth_zero_addr(priv->mac_addr);
+	eth_zero_addr(priv->bssid);
+	p54_setup_mac(priv);
+	mutex_unlock(&priv->conf_mutex);
+}
+
+static int p54_wait_for_stats(struct ieee80211_hw *dev)
+{
+	struct p54_common *priv = dev->priv;
+	int ret;
+
+	priv->update_stats = true;
+	ret = p54_fetch_statistics(priv);
+	if (ret)
+		return ret;
+
+	ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ);
+	if (ret == 0)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static void p54_reset_stats(struct p54_common *priv)
+{
+	struct ieee80211_channel *chan = priv->curchan;
+
+	if (chan) {
+		struct survey_info *info = &priv->survey[chan->hw_value];
+
+		/* only reset channel statistics, don't touch .filled, etc. */
+		info->time = 0;
+		info->time_busy = 0;
+		info->time_tx = 0;
+	}
+
+	priv->update_stats = true;
+	priv->survey_raw.active = 0;
+	priv->survey_raw.cca = 0;
+	priv->survey_raw.tx = 0;
+}
+
+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_CHANNEL) {
+		struct ieee80211_channel *oldchan;
+		WARN_ON(p54_wait_for_stats(dev));
+		oldchan = priv->curchan;
+		priv->curchan = NULL;
+		ret = p54_scan(priv, P54_SCAN_EXIT, 0);
+		if (ret) {
+			priv->curchan = oldchan;
+			goto out;
+		}
+		/*
+		 * TODO: Use the LM_SCAN_TRAP to determine the current
+		 * operating channel.
+		 */
+		priv->curchan = priv->hw->conf.chandef.chan;
+		p54_reset_stats(priv);
+		WARN_ON(p54_fetch_statistics(priv));
+	}
+	if (changed & IEEE80211_CONF_CHANGE_PS) {
+		WARN_ON(p54_wait_for_stats(dev));
+		ret = p54_set_ps(priv);
+		if (ret)
+			goto out;
+		WARN_ON(p54_wait_for_stats(dev));
+	}
+	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
+		WARN_ON(p54_wait_for_stats(dev));
+		ret = p54_setup_mac(priv);
+		if (ret)
+			goto out;
+		WARN_ON(p54_wait_for_stats(dev));
+	}
+
+out:
+	mutex_unlock(&priv->conf_mutex);
+	return ret;
+}
+
+static u64 p54_prepare_multicast(struct ieee80211_hw *dev,
+				 struct netdev_hw_addr_list *mc_list)
+{
+	struct p54_common *priv = dev->priv;
+	struct netdev_hw_addr *ha;
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) !=
+		ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list));
+	/*
+	 * The first entry is reserved for the global broadcast MAC.
+	 * Otherwise the firmware will drop it and ARP will no longer work.
+	 */
+	i = 1;
+	priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i;
+	netdev_hw_addr_list_for_each(ha, mc_list) {
+		memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN);
+		i++;
+		if (i >= ARRAY_SIZE(priv->mc_maclist))
+			break;
+	}
+
+	return 1; /* update */
+}
+
+static void p54_configure_filter(struct ieee80211_hw *dev,
+				 unsigned int changed_flags,
+				 unsigned int *total_flags,
+				 u64 multicast)
+{
+	struct p54_common *priv = dev->priv;
+
+	*total_flags &= FIF_PROMISC_IN_BSS |
+			FIF_ALLMULTI |
+			FIF_OTHER_BSS;
+
+	priv->filter_flags = *total_flags;
+
+	if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
+		p54_setup_mac(priv);
+
+	if (changed_flags & FIF_ALLMULTI || multicast)
+		p54_set_groupfilter(priv);
+}
+
+static int p54_conf_tx(struct ieee80211_hw *dev,
+		       struct ieee80211_vif *vif, u16 queue,
+		       const struct ieee80211_tx_queue_params *params)
+{
+	struct p54_common *priv = dev->priv;
+	int ret;
+
+	mutex_lock(&priv->conf_mutex);
+	if (queue < dev->queues) {
+		P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
+			params->cw_min, params->cw_max, params->txop);
+		ret = p54_set_edcf(priv);
+	} else
+		ret = -EINVAL;
+	mutex_unlock(&priv->conf_mutex);
+	return ret;
+}
+
+static void p54_work(struct work_struct *work)
+{
+	struct p54_common *priv = container_of(work, struct p54_common,
+					       work.work);
+
+	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.
+	 */
+
+	mutex_lock(&priv->conf_mutex);
+	WARN_ON_ONCE(p54_fetch_statistics(priv));
+	mutex_unlock(&priv->conf_mutex);
+}
+
+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 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;
+
+	mutex_lock(&priv->conf_mutex);
+	if (changed & BSS_CHANGED_BSSID) {
+		memcpy(priv->bssid, info->bssid, ETH_ALEN);
+		p54_setup_mac(priv);
+	}
+
+	if (changed & BSS_CHANGED_BEACON) {
+		p54_scan(priv, P54_SCAN_EXIT, 0);
+		p54_setup_mac(priv);
+		p54_beacon_update(priv, vif);
+		p54_set_edcf(priv);
+	}
+
+	if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
+		priv->use_short_slot = info->use_short_slot;
+		p54_set_edcf(priv);
+	}
+	if (changed & BSS_CHANGED_BASIC_RATES) {
+		if (dev->conf.chandef.chan->band == IEEE80211_BAND_5GHZ)
+			priv->basic_rate_mask = (info->basic_rates << 4);
+		else
+			priv->basic_rate_mask = info->basic_rates;
+		p54_setup_mac(priv);
+		if (priv->fw_var >= 0x500)
+			p54_scan(priv, 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(priv);
+		} else {
+			priv->wakeup_timer = 500;
+			priv->aid = 0;
+		}
+	}
+
+	mutex_unlock(&priv->conf_mutex);
+}
+
+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;
+	int slot, ret = 0;
+	u8 algo = 0;
+	u8 *addr = NULL;
+
+	if (modparam_nohwcrypt)
+		return -EOPNOTSUPP;
+
+	if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
+		/*
+		 * Unfortunately most/all firmwares are trying to decrypt
+		 * incoming management frames if a suitable key can be found.
+		 * However, in doing so the data in these frames gets
+		 * corrupted. So, we can't have firmware supported crypto
+		 * offload in this case.
+		 */
+		return -EOPNOTSUPP;
+	}
+
+	mutex_lock(&priv->conf_mutex);
+	if (cmd == SET_KEY) {
+		switch (key->cipher) {
+		case WLAN_CIPHER_SUITE_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 WLAN_CIPHER_SUITE_WEP40:
+		case WLAN_CIPHER_SUITE_WEP104:
+			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 WLAN_CIPHER_SUITE_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 chosen 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;
+		}
+
+		key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
+	} 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;
+	}
+
+	if (sta)
+		addr = sta->addr;
+
+	ret = p54_upload_key(priv, algo, slot, key->keyidx,
+			     key->keylen, addr, key->key);
+	if (ret) {
+		bitmap_release_region(priv->used_rxkeys, slot, 0);
+		ret = -EOPNOTSUPP;
+		goto out_unlock;
+	}
+
+	key->hw_key_idx = slot;
+
+out_unlock:
+	mutex_unlock(&priv->conf_mutex);
+	return ret;
+}
+
+static int p54_get_survey(struct ieee80211_hw *dev, int idx,
+				struct survey_info *survey)
+{
+	struct p54_common *priv = dev->priv;
+	struct ieee80211_channel *chan;
+	int err, tries;
+	bool in_use = false;
+
+	if (idx >= priv->chan_num)
+		return -ENOENT;
+
+#define MAX_TRIES 1
+	for (tries = 0; tries < MAX_TRIES; tries++) {
+		chan = priv->curchan;
+		if (chan && chan->hw_value == idx) {
+			mutex_lock(&priv->conf_mutex);
+			err = p54_wait_for_stats(dev);
+			mutex_unlock(&priv->conf_mutex);
+			if (err)
+				return err;
+
+			in_use = true;
+		}
+
+		memcpy(survey, &priv->survey[idx], sizeof(*survey));
+
+		if (in_use) {
+			/* test if the reported statistics are valid. */
+			if  (survey->time != 0) {
+				survey->filled |= SURVEY_INFO_IN_USE;
+			} else {
+				/*
+				 * hw/fw has not accumulated enough sample sets.
+				 * Wait for 100ms, this ought to be enough to
+				 * to get at least one non-null set of channel
+				 * usage statistics.
+				 */
+				msleep(100);
+				continue;
+			}
+		}
+		return 0;
+	}
+	return -ETIMEDOUT;
+#undef MAX_TRIES
+}
+
+static unsigned int p54_flush_count(struct p54_common *priv)
+{
+	unsigned int total = 0, i;
+
+	BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));
+
+	/*
+	 * Because the firmware has the sole control over any frames
+	 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they
+	 * don't really count as pending or active.
+	 */
+	for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)
+		total += priv->tx_stats[i].len;
+	return total;
+}
+
+static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
+		      u32 queues, bool drop)
+{
+	struct p54_common *priv = dev->priv;
+	unsigned int total, i;
+
+	/*
+	 * Currently, it wouldn't really matter if we wait for one second
+	 * or 15 minutes. But once someone gets around and completes the
+	 * TODOs [ancel stuck frames / reset device] in p54_work, it will
+	 * suddenly make sense to wait that long.
+	 */
+	i = P54_STATISTICS_UPDATE * 2 / 20;
+
+	/*
+	 * In this case no locking is required because as we speak the
+	 * queues have already been stopped and no new frames can sneak
+	 * up from behind.
+	 */
+	while ((total = p54_flush_count(priv) && i--)) {
+		/* waste time */
+		msleep(20);
+	}
+
+	WARN(total, "tx flush timeout, unresponsive firmware");
+}
+
+static void p54_set_coverage_class(struct ieee80211_hw *dev,
+				   s16 coverage_class)
+{
+	struct p54_common *priv = dev->priv;
+
+	mutex_lock(&priv->conf_mutex);
+	/* support all coverage class values as in 802.11-2007 Table 7-27 */
+	priv->coverage_class = clamp_t(u8, coverage_class, 0, 31);
+	p54_set_edcf(priv);
+	mutex_unlock(&priv->conf_mutex);
+}
+
+static const struct ieee80211_ops p54_ops = {
+	.tx			= p54_tx_80211,
+	.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,
+	.sta_add		= p54_sta_add_remove,
+	.sta_remove		= p54_sta_add_remove,
+	.set_key		= p54_set_key,
+	.config			= p54_config,
+	.flush			= p54_flush,
+	.bss_info_changed	= p54_bss_info_changed,
+	.prepare_multicast	= p54_prepare_multicast,
+	.configure_filter	= p54_configure_filter,
+	.conf_tx		= p54_conf_tx,
+	.get_stats		= p54_get_stats,
+	.get_survey		= p54_get_survey,
+	.set_coverage_class	= p54_set_coverage_class,
+};
+
+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;
+	spin_lock_init(&priv->tx_stats_lock);
+	skb_queue_head_init(&priv->tx_queue);
+	skb_queue_head_init(&priv->tx_pending);
+	dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
+		     IEEE80211_HW_SIGNAL_DBM |
+		     IEEE80211_HW_SUPPORTS_PS |
+		     IEEE80211_HW_PS_NULLFUNC_STACK |
+		     IEEE80211_HW_MFP_CAPABLE |
+		     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
+
+	dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+				      BIT(NL80211_IFTYPE_ADHOC) |
+				      BIT(NL80211_IFTYPE_AP) |
+				      BIT(NL80211_IFTYPE_MESH_POINT);
+
+	priv->beacon_req_id = cpu_to_le32(0);
+	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);
+
+	/*
+	 * For now, disable PS by default because it affects
+	 * link stability significantly.
+	 */
+	dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
+
+	mutex_init(&priv->conf_mutex);
+	mutex_init(&priv->eeprom_mutex);
+	init_completion(&priv->stat_comp);
+	init_completion(&priv->eeprom_comp);
+	init_completion(&priv->beacon_comp);
+	INIT_DELAYED_WORK(&priv->work, p54_work);
+
+	eth_broadcast_addr(priv->mc_maclist[0]);
+	priv->curchan = NULL;
+	p54_reset_stats(priv);
+	return dev;
+}
+EXPORT_SYMBOL_GPL(p54_init_common);
+
+int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
+{
+	struct p54_common __maybe_unused *priv = dev->priv;
+	int err;
+
+	err = ieee80211_register_hw(dev);
+	if (err) {
+		dev_err(pdev, "Cannot register device (%d).\n", err);
+		return err;
+	}
+	priv->registered = true;
+
+#ifdef CONFIG_P54_LEDS
+	err = p54_init_leds(priv);
+	if (err) {
+		p54_unregister_common(dev);
+		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;
+	unsigned int i;
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++)
+		kfree(priv->band_table[i]);
+
+	kfree(priv->iq_autocal);
+	kfree(priv->output_limit);
+	kfree(priv->curve_data);
+	kfree(priv->rssi_db);
+	kfree(priv->used_rxkeys);
+	kfree(priv->survey);
+	priv->iq_autocal = NULL;
+	priv->output_limit = NULL;
+	priv->curve_data = NULL;
+	priv->rssi_db = NULL;
+	priv->used_rxkeys = NULL;
+	priv->survey = NULL;
+	ieee80211_free_hw(dev);
+}
+EXPORT_SYMBOL_GPL(p54_free_common);
+
+void p54_unregister_common(struct ieee80211_hw *dev)
+{
+	struct p54_common *priv = dev->priv;
+
+#ifdef CONFIG_P54_LEDS
+	p54_unregister_leds(priv);
+#endif /* CONFIG_P54_LEDS */
+
+	if (priv->registered) {
+		priv->registered = false;
+		ieee80211_unregister_hw(dev);
+	}
+
+	mutex_destroy(&priv->conf_mutex);
+	mutex_destroy(&priv->eeprom_mutex);
+}
+EXPORT_SYMBOL_GPL(p54_unregister_common);