p54: Move mac80211 glue code

Copy the mac80211 glue code from p54common.c into a new file main.c

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 607 insertions, 0 deletions

diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c
new file mode 100644
index 0000000..f9b4f6a
--- /dev/null
+++ b/drivers/net/wireless/p54/main.c
@@ -0,0 +1,607 @@
+/*
+ * 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);
+}
+
+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!
+	 */
+
+	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 p54_common *priv,
+			struct ieee80211_vif *vif)
+{
+	struct sk_buff *beacon;
+	__le32 old_beacon_req_id;
+	int ret;
+
+	beacon = ieee80211_beacon_get(priv->hw, vif);
+	if (!beacon)
+		return -ENOMEM;
+	ret = p54_beacon_format_ie_tim(beacon);
+	if (ret)
+		return ret;
+
+	old_beacon_req_id = priv->beacon_req_id;
+	priv->beacon_req_id = GET_REQ_ID(beacon);
+
+	ret = p54_tx_80211(priv->hw, beacon);
+	if (ret) {
+		priv->beacon_req_id = old_beacon_req_id;
+		return -ENOSPC;
+	}
+
+	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;
+	}
+
+	queue_delayed_work(dev->workqueue, &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;
+	if (priv->beacon_req_id) {
+		p54_tx_cancel(priv, priv->beacon_req_id);
+		priv->beacon_req_id = cpu_to_le32(0);
+	}
+	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 ((params) && !(queue > 4)) {
+		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);
+		}
+	}
+
+	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_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);
+	mutex_init(&priv->eeprom_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)
+{
+	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;
+
+	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);