[net-next-2.6.git] / drivers / net / wireless / p54 / main.c

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

#include <net/mac80211.h>

#include "p54.h"
#include "lmac.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 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_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(priv, sta->addr);
		break;
	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 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.
	 */
	WARN_ON(p54_tx_80211(priv->hw, 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;

	memset(priv->bssid, ~0, ETH_ALEN);
	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;

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

	cancel_delayed_work_sync(&priv->work);

	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_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(priv);
	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;

	/*
	 * 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;
	memset(priv->mac_addr, 0, ETH_ALEN);
	memset(priv->bssid, 0, ETH_ALEN);
	p54_setup_mac(priv);
	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_CHANNEL) {
		ret = p54_scan(priv, P54_SCAN_EXIT, 0);
		if (ret)
			goto out;
	}
	if (changed & IEEE80211_CONF_CHANGE_PS) {
		ret = p54_set_ps(priv);
		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(priv);
}

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 (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.
	 */

	p54_fetch_statistics(priv);
}

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;

	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.channel->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;

	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;
	}

	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 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,
	.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;
	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_BEACON_FILTER |
		     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->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);

	mutex_init(&priv->conf_mutex);
	mutex_init(&priv->eeprom_mutex);
	init_completion(&priv->eeprom_comp);
	init_completion(&priv->beacon_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)
{
	struct p54_common *priv = dev->priv;
	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(priv);
	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;
	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->used_rxkeys);
	priv->iq_autocal = NULL;
	priv->output_limit = NULL;
	priv->curve_data = NULL;
	priv->used_rxkeys = 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 */

	ieee80211_unregister_hw(dev);
	mutex_destroy(&priv->conf_mutex);
	mutex_destroy(&priv->eeprom_mutex);
}
EXPORT_SYMBOL_GPL(p54_unregister_common);
Commit	Line	Data
0ac0d6ce CL	1	/*
	2	* mac80211 glue code for mac80211 Prism54 drivers
	3	*
	4	* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
	5	* Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
	6	* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
	7	*
	8	* Based on:
	9	* - the islsm (softmac prism54) driver, which is:
	10	* Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
	11	* - stlc45xx driver
	12	* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
	13	*
	14	* This program is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License version 2 as
	16	* published by the Free Software Foundation.
	17	*/
	18
	19	#include <linux/init.h>
	20	#include <linux/firmware.h>
	21	#include <linux/etherdevice.h>
	22
	23	#include <net/mac80211.h>
	24
	25	#include "p54.h"
	26	#include "lmac.h"
	27
	28	static int modparam_nohwcrypt;
	29	module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
	30	MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
	31	MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
	32	MODULE_DESCRIPTION("Softmac Prism54 common code");
	33	MODULE_LICENSE("GPL");
	34	MODULE_ALIAS("prism54common");
	35
	36	static void p54_sta_notify(struct ieee80211_hw dev, struct ieee80211_vif vif,
	37	enum sta_notify_cmd notify_cmd,
	38	struct ieee80211_sta *sta)
	39	{
	40	struct p54_common *priv = dev->priv;
	41	switch (notify_cmd) {
	42	case STA_NOTIFY_ADD:
	43	case STA_NOTIFY_REMOVE:
	44	/*
	45	* Notify the firmware that we don't want or we don't
	46	* need to buffer frames for this station anymore.
	47	*/
	48
	49	p54_sta_unlock(priv, sta->addr);
	50	break;
	51	case STA_NOTIFY_AWAKE:
	52	/* update the firmware's filter table */
	53	p54_sta_unlock(priv, sta->addr);
	54	break;
	55	default:
	56	break;
	57	}
	58	}
	59
	60	static int p54_set_tim(struct ieee80211_hw dev, struct ieee80211_sta sta,
	61	bool set)
	62	{
	63	struct p54_common *priv = dev->priv;
	64
65	return p54_update_beacon_tim(priv, sta->aid, set);
66	}
67
e0f114e8	68	u8 p54_find_ie(struct sk_buff skb, u8 ie)
0ac0d6ce	69	{
0ac0d6ce CL	70	struct ieee80211_mgmt mgmt = (void )skb->data;
	71	u8 pos, end;
	72
	73	if (skb->len <= sizeof(mgmt))
e0f114e8	74	return NULL;
0ac0d6ce CL	75
	76	pos = (u8 *)mgmt->u.beacon.variable;
	77	end = skb->data + skb->len;
	78	while (pos < end) {
	79	if (pos + 2 + pos[1] > end)
e0f114e8	80	return NULL;
0ac0d6ce	81
e0f114e8 CL	82	if (pos[0] == ie)
e0f114e8 CL	83	return pos;
0ac0d6ce	84
e0f114e8 CL	85	pos += 2 + pos[1];
	86	}
	87	return NULL;
	88	}
0ac0d6ce	89
e0f114e8 CL	90	static int p54_beacon_format_ie_tim(struct sk_buff *skb)
	91	{
	92	/*
	93	* the good excuse for this mess is ... the firmware.
	94	* The dummy TIM MUST be at the end of the beacon frame,
	95	* because it'll be overwritten!
	96	*/
	97	u8 *tim;
	98	u8 dtim_len;
	99	u8 dtim_period;
	100	u8 *next;
0ac0d6ce	101
e0f114e8 CL	102	tim = p54_find_ie(skb, WLAN_EID_TIM);
	103	if (!tim)
	104	return 0;
0ac0d6ce	105
e0f114e8 CL	106	dtim_len = tim[1];
	107	dtim_period = tim[3];
	108	next = tim + 2 + dtim_len;
	109
	110	if (dtim_len < 3)
	111	return -EINVAL;
	112
	113	memmove(tim, next, skb_tail_pointer(skb) - next);
	114	tim = skb_tail_pointer(skb) - (dtim_len + 2);
	115
	116	/* add the dummy at the end */
	117	tim[0] = WLAN_EID_TIM;
	118	tim[1] = 3;
	119	tim[2] = 0;
	120	tim[3] = dtim_period;
	121	tim[4] = 0;
	122
	123	if (dtim_len > 3)
	124	skb_trim(skb, skb->len - (dtim_len - 3));
0ac0d6ce	125
0ac0d6ce CL	126	return 0;
	127	}
	128
	129	static int p54_beacon_update(struct p54_common *priv,
	130	struct ieee80211_vif *vif)
	131	{
	132	struct sk_buff *beacon;
0ac0d6ce CL	133	int ret;
	134
	135	beacon = ieee80211_beacon_get(priv->hw, vif);
	136	if (!beacon)
	137	return -ENOMEM;
	138	ret = p54_beacon_format_ie_tim(beacon);
	139	if (ret)
	140	return ret;
	141
46df10ae CL	142	/*
	143	* During operation, the firmware takes care of beaconing.
	144	* The driver only needs to upload a new beacon template, once
	145	* the template was changed by the stack or userspace.
	146	*
	147	* LMAC API 3.2.2 also specifies that the driver does not need
	148	* to cancel the old beacon template by hand, instead the firmware
	149	* will release the previous one through the feedback mechanism.
	150	*/
	151	WARN_ON(p54_tx_80211(priv->hw, beacon));
0ac0d6ce CL	152	priv->tsf_high32 = 0;
	153	priv->tsf_low32 = 0;
	154
	155	return 0;
	156	}
	157
	158	static int p54_start(struct ieee80211_hw *dev)
	159	{
	160	struct p54_common *priv = dev->priv;
	161	int err;
	162
	163	mutex_lock(&priv->conf_mutex);
	164	err = priv->open(dev);
	165	if (err)
	166	goto out;
	167	P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
	168	P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
	169	P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
	170	P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
	171	err = p54_set_edcf(priv);
	172	if (err)
	173	goto out;
	174
	175	memset(priv->bssid, ~0, ETH_ALEN);
	176	priv->mode = NL80211_IFTYPE_MONITOR;
	177	err = p54_setup_mac(priv);
	178	if (err) {
	179	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
	180	goto out;
	181	}
	182
42935eca	183	ieee80211_queue_delayed_work(dev, &priv->work, 0);
0ac0d6ce CL	184
	185	priv->softled_state = 0;
	186	err = p54_set_leds(priv);
	187
	188	out:
	189	mutex_unlock(&priv->conf_mutex);
	190	return err;
	191	}
	192
	193	static void p54_stop(struct ieee80211_hw *dev)
	194	{
	195	struct p54_common *priv = dev->priv;
	196	int i;
	197
	198	mutex_lock(&priv->conf_mutex);
	199	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
	200	priv->softled_state = 0;
	201	p54_set_leds(priv);
	202
	203	cancel_delayed_work_sync(&priv->work);
	204
	205	priv->stop(dev);
	206	skb_queue_purge(&priv->tx_pending);
	207	skb_queue_purge(&priv->tx_queue);
	208	for (i = 0; i < P54_QUEUE_NUM; i++) {
	209	priv->tx_stats[i].count = 0;
	210	priv->tx_stats[i].len = 0;
	211	}
	212
	213	priv->beacon_req_id = cpu_to_le32(0);
	214	priv->tsf_high32 = priv->tsf_low32 = 0;
	215	mutex_unlock(&priv->conf_mutex);
	216	}
	217
	218	static int p54_add_interface(struct ieee80211_hw *dev,
	219	struct ieee80211_if_init_conf *conf)
	220	{
	221	struct p54_common *priv = dev->priv;
	222
	223	mutex_lock(&priv->conf_mutex);
	224	if (priv->mode != NL80211_IFTYPE_MONITOR) {
	225	mutex_unlock(&priv->conf_mutex);
	226	return -EOPNOTSUPP;
	227	}
	228
	229	priv->vif = conf->vif;
	230
	231	switch (conf->type) {
	232	case NL80211_IFTYPE_STATION:
	233	case NL80211_IFTYPE_ADHOC:
	234	case NL80211_IFTYPE_AP:
	235	case NL80211_IFTYPE_MESH_POINT:
	236	priv->mode = conf->type;
	237	break;
	238	default:
	239	mutex_unlock(&priv->conf_mutex);
	240	return -EOPNOTSUPP;
	241	}
	242
	243	memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
	244	p54_setup_mac(priv);
	245	mutex_unlock(&priv->conf_mutex);
	246	return 0;
	247	}
248
249	static void p54_remove_interface(struct ieee80211_hw *dev,
250	struct ieee80211_if_init_conf *conf)
251	{
252	struct p54_common *priv = dev->priv;
253
254	mutex_lock(&priv->conf_mutex);
255	priv->vif = NULL;
46df10ae CL	256
	257	/*
	258	* LMAC API 3.2.2 states that any active beacon template must be
	259	* canceled by the driver before attempting a mode transition.
	260	*/
	261	if (le32_to_cpu(priv->beacon_req_id) != 0) {
0ac0d6ce	262	p54_tx_cancel(priv, priv->beacon_req_id);
46df10ae	263	wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
0ac0d6ce CL	264	}
	265	priv->mode = NL80211_IFTYPE_MONITOR;
	266	memset(priv->mac_addr, 0, ETH_ALEN);
	267	memset(priv->bssid, 0, ETH_ALEN);
	268	p54_setup_mac(priv);
	269	mutex_unlock(&priv->conf_mutex);
	270	}
	271
	272	static int p54_config(struct ieee80211_hw *dev, u32 changed)
	273	{
	274	int ret = 0;
	275	struct p54_common *priv = dev->priv;
	276	struct ieee80211_conf *conf = &dev->conf;
	277
	278	mutex_lock(&priv->conf_mutex);
	279	if (changed & IEEE80211_CONF_CHANGE_POWER)
	280	priv->output_power = conf->power_level << 2;
	281	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
	282	ret = p54_scan(priv, P54_SCAN_EXIT, 0);
	283	if (ret)
	284	goto out;
	285	}
	286	if (changed & IEEE80211_CONF_CHANGE_PS) {
	287	ret = p54_set_ps(priv);
	288	if (ret)
	289	goto out;
	290	}
	291
	292	out:
	293	mutex_unlock(&priv->conf_mutex);
	294	return ret;
	295	}
	296
	297	static void p54_configure_filter(struct ieee80211_hw *dev,
	298	unsigned int changed_flags,
	299	unsigned int *total_flags,
	300	int mc_count, struct dev_mc_list *mclist)
	301	{
	302	struct p54_common *priv = dev->priv;
	303
	304	*total_flags &= FIF_PROMISC_IN_BSS \|
	305	FIF_OTHER_BSS;
	306
	307	priv->filter_flags = *total_flags;
	308
	309	if (changed_flags & (FIF_PROMISC_IN_BSS \| FIF_OTHER_BSS))
	310	p54_setup_mac(priv);
	311	}
	312
	313	static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
	314	const struct ieee80211_tx_queue_params *params)
	315	{
	316	struct p54_common *priv = dev->priv;
	317	int ret;
	318
	319	mutex_lock(&priv->conf_mutex);
718126a7	320	if (queue < dev->queues) {
0ac0d6ce CL	321	P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
	322	params->cw_min, params->cw_max, params->txop);
	323	ret = p54_set_edcf(priv);
	324	} else
	325	ret = -EINVAL;
	326	mutex_unlock(&priv->conf_mutex);
	327	return ret;
	328	}
	329
	330	static void p54_work(struct work_struct *work)
	331	{
	332	struct p54_common *priv = container_of(work, struct p54_common,
	333	work.work);
	334
	335	if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
	336	return ;
	337
	338	/*
	339	* TODO: walk through tx_queue and do the following tasks
	340	* 1. initiate bursts.
	341	* 2. cancel stuck frames / reset the device if necessary.
	342	*/
	343
	344	p54_fetch_statistics(priv);
	345	}
	346
	347	static int p54_get_stats(struct ieee80211_hw *dev,
	348	struct ieee80211_low_level_stats *stats)
	349	{
	350	struct p54_common *priv = dev->priv;
	351
	352	memcpy(stats, &priv->stats, sizeof(*stats));
	353	return 0;
	354	}
	355
	356	static int p54_get_tx_stats(struct ieee80211_hw *dev,
	357	struct ieee80211_tx_queue_stats *stats)
	358	{
	359	struct p54_common *priv = dev->priv;
	360
	361	memcpy(stats, &priv->tx_stats[P54_QUEUE_DATA],
	362	sizeof(stats[0]) * dev->queues);
	363	return 0;
	364	}
	365
	366	static void p54_bss_info_changed(struct ieee80211_hw *dev,
	367	struct ieee80211_vif *vif,
	368	struct ieee80211_bss_conf *info,
	369	u32 changed)
	370	{
	371	struct p54_common *priv = dev->priv;
	372
	373	mutex_lock(&priv->conf_mutex);
	374	if (changed & BSS_CHANGED_BSSID) {
	375	memcpy(priv->bssid, info->bssid, ETH_ALEN);
	376	p54_setup_mac(priv);
	377	}
	378
	379	if (changed & BSS_CHANGED_BEACON) {
	380	p54_scan(priv, P54_SCAN_EXIT, 0);
	381	p54_setup_mac(priv);
	382	p54_beacon_update(priv, vif);
	383	p54_set_edcf(priv);
	384	}
385
386	if (changed & (BSS_CHANGED_ERP_SLOT \| BSS_CHANGED_BEACON)) {
387	priv->use_short_slot = info->use_short_slot;
388	p54_set_edcf(priv);
389	}
390	if (changed & BSS_CHANGED_BASIC_RATES) {
391	if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
392	priv->basic_rate_mask = (info->basic_rates << 4);
393	else
394	priv->basic_rate_mask = info->basic_rates;
395	p54_setup_mac(priv);
396	if (priv->fw_var >= 0x500)
397	p54_scan(priv, P54_SCAN_EXIT, 0);
398	}
399	if (changed & BSS_CHANGED_ASSOC) {
400	if (info->assoc) {
401	priv->aid = info->aid;
402	priv->wakeup_timer = info->beacon_int *
403	info->dtim_period * 5;
404	p54_setup_mac(priv);
e0f114e8 CL	405	} else {
	406	priv->wakeup_timer = 500;
	407	priv->aid = 0;
0ac0d6ce CL	408	}
	409	}
	410
	411	mutex_unlock(&priv->conf_mutex);
	412	}
	413
	414	static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
	415	struct ieee80211_vif vif, struct ieee80211_sta sta,
	416	struct ieee80211_key_conf *key)
	417	{
	418	struct p54_common *priv = dev->priv;
	419	int slot, ret = 0;
	420	u8 algo = 0;
	421	u8 *addr = NULL;
	422
	423	if (modparam_nohwcrypt)
	424	return -EOPNOTSUPP;
	425
	426	mutex_lock(&priv->conf_mutex);
	427	if (cmd == SET_KEY) {
	428	switch (key->alg) {
	429	case ALG_TKIP:
	430	if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL \|
	431	BR_DESC_PRIV_CAP_TKIP))) {
	432	ret = -EOPNOTSUPP;
	433	goto out_unlock;
	434	}
	435	key->flags \|= IEEE80211_KEY_FLAG_GENERATE_IV;
	436	algo = P54_CRYPTO_TKIPMICHAEL;
	437	break;
	438	case ALG_WEP:
	439	if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
	440	ret = -EOPNOTSUPP;
	441	goto out_unlock;
	442	}
	443	key->flags \|= IEEE80211_KEY_FLAG_GENERATE_IV;
	444	algo = P54_CRYPTO_WEP;
	445	break;
	446	case ALG_CCMP:
	447	if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
	448	ret = -EOPNOTSUPP;
	449	goto out_unlock;
	450	}
	451	key->flags \|= IEEE80211_KEY_FLAG_GENERATE_IV;
	452	algo = P54_CRYPTO_AESCCMP;
	453	break;
	454	default:
	455	ret = -EOPNOTSUPP;
	456	goto out_unlock;
	457	}
	458	slot = bitmap_find_free_region(priv->used_rxkeys,
	459	priv->rx_keycache_size, 0);
	460
	461	if (slot < 0) {
	462	/*
	463	* The device supports the choosen algorithm, but the
	464	* firmware does not provide enough key slots to store
	465	* all of them.
	466	* But encryption offload for outgoing frames is always
	467	* possible, so we just pretend that the upload was
	468	* successful and do the decryption in software.
	469	*/
	470
	471	/* mark the key as invalid. */
472	key->hw_key_idx = 0xff;
473	goto out_unlock;
474	}
475	} else {
476	slot = key->hw_key_idx;
477
478	if (slot == 0xff) {
479	/* This key was not uploaded into the rx key cache. */
480
481	goto out_unlock;
482	}
483
484	bitmap_release_region(priv->used_rxkeys, slot, 0);
485	algo = 0;
486	}
487
488	if (sta)
489	addr = sta->addr;
490
491	ret = p54_upload_key(priv, algo, slot, key->keyidx,
492	key->keylen, addr, key->key);
493	if (ret) {
494	bitmap_release_region(priv->used_rxkeys, slot, 0);
495	ret = -EOPNOTSUPP;
496	goto out_unlock;
497	}
498
499	key->hw_key_idx = slot;
500
501	out_unlock:
502	mutex_unlock(&priv->conf_mutex);
503	return ret;
504	}
505
506	static const struct ieee80211_ops p54_ops = {
507	.tx = p54_tx_80211,
508	.start = p54_start,
509	.stop = p54_stop,
510	.add_interface = p54_add_interface,
511	.remove_interface = p54_remove_interface,
512	.set_tim = p54_set_tim,
513	.sta_notify = p54_sta_notify,
514	.set_key = p54_set_key,
515	.config = p54_config,
516	.bss_info_changed = p54_bss_info_changed,
517	.configure_filter = p54_configure_filter,
518	.conf_tx = p54_conf_tx,
519	.get_stats = p54_get_stats,
520	.get_tx_stats = p54_get_tx_stats
521	};
522
523	struct ieee80211_hw *p54_init_common(size_t priv_data_len)
524	{
525	struct ieee80211_hw *dev;
526	struct p54_common *priv;
527
528	dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
529	if (!dev)
530	return NULL;
531
532	priv = dev->priv;
533	priv->hw = dev;
534	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
535	priv->basic_rate_mask = 0x15f;
536	spin_lock_init(&priv->tx_stats_lock);
537	skb_queue_head_init(&priv->tx_queue);
538	skb_queue_head_init(&priv->tx_pending);
539	dev->flags = IEEE80211_HW_RX_INCLUDES_FCS \|
540	IEEE80211_HW_SIGNAL_DBM \|
e0f114e8 CL	541	IEEE80211_HW_SUPPORTS_PS \|
	542	IEEE80211_HW_PS_NULLFUNC_STACK \|
	543	IEEE80211_HW_BEACON_FILTER \|
0ac0d6ce CL	544	IEEE80211_HW_NOISE_DBM;
	545
	546	dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) \|
	547	BIT(NL80211_IFTYPE_ADHOC) \|
	548	BIT(NL80211_IFTYPE_AP) \|
	549	BIT(NL80211_IFTYPE_MESH_POINT);
	550
	551	dev->channel_change_time = 1000; /* TODO: find actual value */
46df10ae	552	priv->beacon_req_id = cpu_to_le32(0);
0ac0d6ce CL	553	priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
	554	priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
	555	priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
	556	priv->tx_stats[P54_QUEUE_CAB].limit = 3;
	557	priv->tx_stats[P54_QUEUE_DATA].limit = 5;
	558	dev->queues = 1;
	559	priv->noise = -94;
	560	/*
	561	* We support at most 8 tries no matter which rate they're at,
	562	* we cannot support max_rates * max_rate_tries as we set it
	563	* here, but setting it correctly to 4/2 or so would limit us
	564	* artificially if the RC algorithm wants just two rates, so
	565	* let's say 4/7, we'll redistribute it at TX time, see the
	566	* comments there.
	567	*/
	568	dev->max_rates = 4;
	569	dev->max_rate_tries = 7;
	570	dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
	571	sizeof(struct p54_tx_data);
	572
	573	mutex_init(&priv->conf_mutex);
	574	mutex_init(&priv->eeprom_mutex);
	575	init_completion(&priv->eeprom_comp);
46df10ae	576	init_completion(&priv->beacon_comp);
0ac0d6ce CL	577	INIT_DELAYED_WORK(&priv->work, p54_work);
	578
	579	return dev;
	580	}
	581	EXPORT_SYMBOL_GPL(p54_init_common);
	582
	583	int p54_register_common(struct ieee80211_hw dev, struct device pdev)
	584	{
	585	struct p54_common *priv = dev->priv;
	586	int err;
	587
	588	err = ieee80211_register_hw(dev);
	589	if (err) {
	590	dev_err(pdev, "Cannot register device (%d).\n", err);
	591	return err;
	592	}
	593
	594	#ifdef CONFIG_P54_LEDS
	595	err = p54_init_leds(priv);
	596	if (err)
	597	return err;
	598	#endif /* CONFIG_P54_LEDS */
	599
	600	dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
	601	return 0;
	602	}
	603	EXPORT_SYMBOL_GPL(p54_register_common);
	604
	605	void p54_free_common(struct ieee80211_hw *dev)
	606	{
	607	struct p54_common *priv = dev->priv;
1a9b6679 CL	608	unsigned int i;
	609
	610	for (i = 0; i < IEEE80211_NUM_BANDS; i++)
	611	kfree(priv->band_table[i]);
0ac0d6ce CL	612
	613	kfree(priv->iq_autocal);
	614	kfree(priv->output_limit);
	615	kfree(priv->curve_data);
	616	kfree(priv->used_rxkeys);
	617	priv->iq_autocal = NULL;
	618	priv->output_limit = NULL;
	619	priv->curve_data = NULL;
	620	priv->used_rxkeys = NULL;
	621	ieee80211_free_hw(dev);
	622	}
	623	EXPORT_SYMBOL_GPL(p54_free_common);
	624
	625	void p54_unregister_common(struct ieee80211_hw *dev)
	626	{
	627	struct p54_common *priv = dev->priv;
	628
	629	#ifdef CONFIG_P54_LEDS
	630	p54_unregister_leds(priv);
	631	#endif /* CONFIG_P54_LEDS */
	632
	633	ieee80211_unregister_hw(dev);
	634	mutex_destroy(&priv->conf_mutex);
	635	mutex_destroy(&priv->eeprom_mutex);
	636	}
	637	EXPORT_SYMBOL_GPL(p54_unregister_common);