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>
diff --git a/drivers/net/wireless/rtl818x/rtl8180_dev.c b/drivers/net/wireless/rtl818x/rtl8180_dev.c
index 3a214d7..cbdc5cf 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_dev.c
@@ -662,10 +662,59 @@
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 @@
switch (vif->type) {
case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_ADHOC:
break;
default:
return -EOPNOTSUPP;
@@ -682,6 +732,12 @@
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 @@
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 @@
}
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 @@
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 @@
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;