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|
/*
* 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_vif *vif)
{
struct p54_common *priv = dev
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