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authorJohn W. Linville <linville@tuxdriver.com>2010-05-06 22:49:40 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-05-07 20:57:09 +0200
commitc809e86c11a64488acc85ddf12ece3c9b879ccb6 (patch)
treeb687b263154bc6e0cf84cc35f81bb782c5677192 /drivers/net/wireless/rtl818x
parentrtl8180: assign sequence numbers in the driver (diff)
downloadlinux-c809e86c11a64488acc85ddf12ece3c9b879ccb6.tar.xz
linux-c809e86c11a64488acc85ddf12ece3c9b879ccb6.zip
rtl8180: add software-based support for IBSS mode
Device documentation suggests that hardware support for beaconing is available. But I implemented software-based beacon generation as an experiment and it seems better to have that working now rather than waiting for something better to materialize. Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rtl818x')
-rw-r--r--drivers/net/wireless/rtl818x/rtl8180.h8
-rw-r--r--drivers/net/wireless/rtl818x/rtl8180_dev.c82
2 files changed, 80 insertions, 10 deletions
diff --git a/drivers/net/wireless/rtl818x/rtl8180.h b/drivers/net/wireless/rtl818x/rtl8180.h
index b92d678abc0c..4baf0cf0826f 100644
--- a/drivers/net/wireless/rtl818x/rtl8180.h
+++ b/drivers/net/wireless/rtl818x/rtl8180.h
@@ -55,6 +55,14 @@ struct rtl8180_tx_ring {
struct sk_buff_head queue;
};
+struct rtl8180_vif {
+ struct ieee80211_hw *dev;
+
+ /* beaconing */
+ struct delayed_work beacon_work;
+ bool enable_beacon;
+};
+
struct rtl8180_priv {
/* common between rtl818x drivers */
struct rtl818x_csr __iomem *map;
diff --git a/drivers/net/wireless/rtl818x/rtl8180_dev.c b/drivers/net/wireless/rtl818x/rtl8180_dev.c
index 3a214d7507a5..cbdc5cfec90c 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_dev.c
@@ -662,10 +662,59 @@ static void rtl8180_stop(struct ieee80211_hw *dev)
rtl8180_free_tx_ring(dev, i);
}
+static u64 rtl8180_get_tsf(struct ieee80211_hw *dev)
+{
+ struct rtl8180_priv *priv = dev->priv;
+
+ return rtl818x_ioread32(priv, &priv->map->TSFT[0]) |
+ (u64)(rtl818x_ioread32(priv, &priv->map->TSFT[1])) << 32;
+}
+
+void rtl8180_beacon_work(struct work_struct *work)
+{
+ struct rtl8180_vif *vif_priv =
+ container_of(work, struct rtl8180_vif, beacon_work.work);
+ struct ieee80211_vif *vif =
+ container_of((void *)vif_priv, struct ieee80211_vif, drv_priv);
+ struct ieee80211_hw *dev = vif_priv->dev;
+ struct ieee80211_mgmt *mgmt;
+ struct sk_buff *skb;
+ int err = 0;
+
+ /* don't overflow the tx ring */
+ if (ieee80211_queue_stopped(dev, 0))
+ goto resched;
+
+ /* grab a fresh beacon */
+ skb = ieee80211_beacon_get(dev, vif);
+
+ /*
+ * update beacon timestamp w/ TSF value
+ * TODO: make hardware update beacon timestamp
+ */
+ mgmt = (struct ieee80211_mgmt *)skb->data;
+ mgmt->u.beacon.timestamp = cpu_to_le64(rtl8180_get_tsf(dev));
+
+ /* TODO: use actual beacon queue */
+ skb_set_queue_mapping(skb, 0);
+
+ err = rtl8180_tx(dev, skb);
+ WARN_ON(err);
+
+resched:
+ /*
+ * schedule next beacon
+ * TODO: use hardware support for beacon timing
+ */
+ schedule_delayed_work(&vif_priv->beacon_work,
+ usecs_to_jiffies(1024 * vif->bss_conf.beacon_int));
+}
+
static int rtl8180_add_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif)
{
struct rtl8180_priv *priv = dev->priv;
+ struct rtl8180_vif *vif_priv;
/*
* We only support one active interface at a time.
@@ -675,6 +724,7 @@ static int rtl8180_add_interface(struct ieee80211_hw *dev,
switch (vif->type) {
case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_ADHOC:
break;
default:
return -EOPNOTSUPP;
@@ -682,6 +732,12 @@ static int rtl8180_add_interface(struct ieee80211_hw *dev,
priv->vif = vif;
+ /* Initialize driver private area */
+ vif_priv = (struct rtl8180_vif *)&vif->drv_priv;
+ vif_priv->dev = dev;
+ INIT_DELAYED_WORK(&vif_priv->beacon_work, rtl8180_beacon_work);
+ vif_priv->enable_beacon = false;
+
rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->MAC[0],
le32_to_cpu(*(__le32 *)vif->addr));
@@ -715,8 +771,11 @@ static void rtl8180_bss_info_changed(struct ieee80211_hw *dev,
u32 changed)
{
struct rtl8180_priv *priv = dev->priv;
+ struct rtl8180_vif *vif_priv;
int i;
+ vif_priv = (struct rtl8180_vif *)&vif->drv_priv;
+
if (changed & BSS_CHANGED_BSSID) {
for (i = 0; i < ETH_ALEN; i++)
rtl818x_iowrite8(priv, &priv->map->BSSID[i],
@@ -731,7 +790,16 @@ static void rtl8180_bss_info_changed(struct ieee80211_hw *dev,
}
if (changed & BSS_CHANGED_ERP_SLOT && priv->rf->conf_erp)
- priv->rf->conf_erp(dev, info);
+ priv->rf->conf_erp(dev, info);
+
+ if (changed & BSS_CHANGED_BEACON_ENABLED)
+ vif_priv->enable_beacon = info->enable_beacon;
+
+ if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON)) {
+ cancel_delayed_work_sync(&vif_priv->beacon_work);
+ if (vif_priv->enable_beacon)
+ schedule_work(&vif_priv->beacon_work.work);
+ }
}
static u64 rtl8180_prepare_multicast(struct ieee80211_hw *dev, int mc_count,
@@ -772,14 +840,6 @@ static void rtl8180_configure_filter(struct ieee80211_hw *dev,
rtl818x_iowrite32(priv, &priv->map->RX_CONF, priv->rx_conf);
}
-static u64 rtl8180_get_tsf(struct ieee80211_hw *dev)
-{
- struct rtl8180_priv *priv = dev->priv;
-
- return rtl818x_ioread32(priv, &priv->map->TSFT[0]) |
- (u64)(rtl818x_ioread32(priv, &priv->map->TSFT[1])) << 32;
-}
-
static const struct ieee80211_ops rtl8180_ops = {
.tx = rtl8180_tx,
.start = rtl8180_start,
@@ -916,7 +976,9 @@ static int __devinit rtl8180_probe(struct pci_dev *pdev,
dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_SIGNAL_UNSPEC;
- dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
+ dev->vif_data_size = sizeof(struct rtl8180_vif);
+ dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+ BIT(NL80211_IFTYPE_ADHOC);
dev->queues = 1;
dev->max_signal = 65;