Add rt2x00-mac80211 snapshot (#1916)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8184 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 441 insertions, 0 deletions

diff --git a/package/rt2x00/src/rt2x00mac.c b/package/rt2x00/src/rt2x00mac.c
new file mode 100644
index 0000000000..349353bee5
--- /dev/null
+++ b/package/rt2x00/src/rt2x00mac.c
@@ -0,0 +1,441 @@
+/*
+	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+	<http://rt2x00.serialmonkey.com>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the
+	Free Software Foundation, Inc.,
+	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+	Module: rt2x00lib
+	Abstract: rt2x00 generic mac80211 routines.
+	Supported chipsets: RT2460, RT2560, RT2570,
+	rt2561, rt2561s, rt2661, rt2571W & rt2671.
+ */
+
+/*
+ * Set enviroment defines for rt2x00.h
+ */
+#define DRV_NAME "rt2x00lib"
+
+#include <linux/netdevice.h>
+
+#include "rt2x00.h"
+#include "rt2x00dev.h"
+
+static int rt2x00_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
+	struct data_ring *ring, struct sk_buff *frag_skb,
+	struct ieee80211_tx_control *control)
+{
+	struct sk_buff *skb;
+	int size;
+
+	if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
+		size = sizeof(struct ieee80211_cts);
+	else
+		size = sizeof(struct ieee80211_rts);
+
+	skb = dev_alloc_skb(size + rt2x00dev->hw->extra_tx_headroom);
+	if (!skb) {
+		WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n");
+		return NETDEV_TX_BUSY;
+	}
+
+	skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
+	skb_put(skb, size);
+
+	if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
+		ieee80211_ctstoself_get(rt2x00dev->hw,
+			frag_skb->data, frag_skb->len, control,
+			(struct ieee80211_cts*)(skb->data));
+	else
+		ieee80211_rts_get(rt2x00dev->hw,
+			frag_skb->data, frag_skb->len, control,
+			(struct ieee80211_rts*)(skb->data));
+
+	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) {
+		WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n");
+		return NETDEV_TX_BUSY;
+	}
+
+	return NETDEV_TX_OK;
+}
+
+int rt2x00lib_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
+	struct ieee80211_tx_control *control)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr*)skb->data;
+	struct data_ring *ring;
+	u16 frame_control;
+
+	/*
+	 * Determine which ring to put packet on.
+	 */
+	ring = rt2x00_get_ring(rt2x00dev, control->queue);
+	if (unlikely(!ring)) {
+		ERROR(rt2x00dev,
+			"Attempt to send packet over invalid queue %d.\n"
+			"Please file bug report to %s.\n",
+			control->queue, DRV_PROJECT);
+		dev_kfree_skb_any(skb);
+		return NETDEV_TX_OK;
+	}
+
+	/*
+	 * If CTS/RTS is required. and this frame is not CTS or RTS,
+	 * create and queue that frame first. But make sure we have
+	 * at least enough entries available to send this CTS/RTS
+	 * frame as well as the data frame.
+	 */
+	frame_control = le16_to_cpu(ieee80211hdr->frame_control);
+	if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS &&
+	    !is_cts_frame(frame_control) && !is_rts_frame(frame_control)) {
+		if (rt2x00_ring_free(ring) <= 1)
+			return NETDEV_TX_BUSY;
+
+		if (rt2x00_tx_rts_cts(rt2x00dev, ring, skb, control))
+			return NETDEV_TX_BUSY;
+	}
+
+	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control))
+		return NETDEV_TX_BUSY;
+
+	if (rt2x00dev->ops->lib->kick_tx_queue)
+		rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
+
+	return NETDEV_TX_OK;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_tx);
+
+int rt2x00lib_reset(struct ieee80211_hw *hw)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+
+	rt2x00lib_disable_radio(rt2x00dev);
+	return rt2x00lib_enable_radio(rt2x00dev);
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_reset);
+
+int rt2x00lib_open(struct ieee80211_hw *hw)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	int status;
+
+	/*
+	 * We must wait on the firmware before
+	 * we can safely continue.
+	 */
+	status = rt2x00lib_load_firmware_wait(rt2x00dev);
+	if (status)
+		return status;
+
+	/*
+	 * Initialize the device.
+	 */
+	status = rt2x00lib_initialize(rt2x00dev);
+	if (status)
+		return status;
+
+	/*
+	 * Enable radio.
+	 */
+	status = rt2x00lib_enable_radio(rt2x00dev);
+	if (status) {
+		rt2x00lib_uninitialize(rt2x00dev);
+		return status;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_open);
+
+int rt2x00lib_stop(struct ieee80211_hw *hw)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+
+	rt2x00lib_disable_radio(rt2x00dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_stop);
+
+int rt2x00lib_add_interface(struct ieee80211_hw *hw,
+	struct ieee80211_if_init_conf *conf)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	struct interface *intf = &rt2x00dev->interface;
+
+	/*
+	 * We only support 1 non-monitor interface.
+	 */
+	if (conf->type != IEEE80211_IF_TYPE_MNTR &&
+	    is_interface_present(&rt2x00dev->interface))
+		return -ENOBUFS;
+
+	/*
+	 * We support muliple monitor mode interfaces.
+	 * All we need to do is increase the monitor_count.
+	 */
+	if (conf->type == IEEE80211_IF_TYPE_MNTR) {
+		intf->monitor_count++;
+	} else {
+		intf->id = conf->if_id;
+		intf->type = conf->type;
+		if (conf->type == IEEE80211_IF_TYPE_AP)
+			memcpy(&intf->bssid, conf->mac_addr, ETH_ALEN);
+		intf->promisc = 0;
+	}
+
+	/*
+	 * If this is the first interface which is being added,
+	 * we should write the MAC address to the device.
+	 */
+	if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
+		rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, conf->mac_addr);
+
+	/*
+	 * Enable periodic link tuning if this is a non-monitor interface.
+	 */
+	if (conf->type != IEEE80211_IF_TYPE_MNTR)
+		rt2x00_start_link_tune(rt2x00dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_add_interface);
+
+void rt2x00lib_remove_interface(struct ieee80211_hw *hw,
+	struct ieee80211_if_init_conf *conf)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	struct interface *intf = &rt2x00dev->interface;
+
+	/*
+	 * We only support 1 non-monitor interface.
+	 */
+	if (conf->type != IEEE80211_IF_TYPE_MNTR &&
+	    !is_interface_present(&rt2x00dev->interface))
+		return;
+
+	/*
+	 * We support muliple monitor mode interfaces.
+	 * All we need to do is decrease the monitor_count.
+	 */
+	if (conf->type == IEEE80211_IF_TYPE_MNTR) {
+		intf->monitor_count--;
+	} else if (intf->type == conf->type) {
+		intf->id = 0;
+		intf->type = -EINVAL;
+		memset(&intf->bssid, 0x00, ETH_ALEN);
+		intf->promisc = 0;
+	}
+
+	/*
+	 * When this is a non-monitor mode, stop the periodic link tuning.
+	 */
+	if (conf->type != IEEE80211_IF_TYPE_MNTR)
+		rt2x00_stop_link_tune(rt2x00dev);
+
+	/*
+	 * Check if we still have 1 non-monitor or a monitor
+	 * interface enabled. In that case we should update the
+	 * registers.
+	 */
+	if (is_monitor_present(&rt2x00dev->interface) ^
+	    is_interface_present(&rt2x00dev->interface)) {
+		if (is_interface_present(&rt2x00dev->interface))
+			rt2x00lib_config_type(rt2x00dev,
+				rt2x00dev->interface.type);
+		else
+			rt2x00lib_config_type(rt2x00dev,
+				IEEE80211_IF_TYPE_MNTR);
+	}
+
+	/*
+	 * Check which interfaces have been disabled.
+	 */
+	if (!is_interface_present(&rt2x00dev->interface))
+		__clear_bit(INTERFACE_ENABLED, &rt2x00dev->flags);
+	else if (!is_monitor_present(&rt2x00dev->interface))
+		__clear_bit(INTERFACE_ENABLED_MONITOR, &rt2x00dev->flags);
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_remove_interface);
+
+int rt2x00lib_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+
+	/*
+	 * Check if we need to disable the radio,
+	 * if this is not the case, at least the RX must be disabled.
+	 */
+	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) {
+		if (!conf->radio_enabled)
+			rt2x00lib_disable_radio(rt2x00dev);
+		else
+			rt2x00lib_toggle_rx(rt2x00dev, 0);
+	}
+
+	rt2x00lib_config_phymode(rt2x00dev, conf->phymode);
+	rt2x00lib_config_channel(rt2x00dev, conf->channel_val,
+		conf->channel, conf->freq, conf->power_level);
+	rt2x00lib_config_txpower(rt2x00dev, conf->power_level);
+	rt2x00lib_config_antenna(rt2x00dev,
+		conf->antenna_sel_tx, conf->antenna_sel_rx);
+	rt2x00dev->ops->lib->config_duration(rt2x00dev,
+		(conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME),
+		conf->beacon_int);
+
+	/*
+	 * Reenable RX only if the radio should be on.
+	 */
+	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
+		rt2x00lib_toggle_rx(rt2x00dev, 1);
+	else if (conf->radio_enabled)
+		return rt2x00lib_enable_radio(rt2x00dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_config);
+
+int rt2x00lib_config_interface(struct ieee80211_hw *hw, int if_id,
+	struct ieee80211_if_conf *conf)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	struct interface *intf = &rt2x00dev->interface;
+	int status;
+
+	/*
+	 * Monitor mode does not need configuring.
+	 * If the given type does not match the configured type,
+	 * there has been a problem.
+	 */
+	if (conf->type == IEEE80211_IF_TYPE_MNTR)
+		return 0;
+	else if (conf->type != intf->type)
+		return -EINVAL;
+
+	/*
+	 * If the interface does not work in master mode,
+	 * then the bssid value in the interface structure
+	 * should now be set.
+	 */
+	if (conf->type != IEEE80211_IF_TYPE_AP)
+		memcpy(&intf->bssid, conf->bssid, ETH_ALEN);
+
+	/*
+	 * Enable configuration.
+	 * For Monitor mode, promisc mode will be forced on.
+	 */
+	rt2x00lib_config_type(rt2x00dev, conf->type);
+	rt2x00lib_config_promisc(rt2x00dev, rt2x00dev->interface.promisc);
+	rt2x00dev->ops->lib->config_bssid(rt2x00dev, intf->bssid);
+
+	/*
+	 * We only need to initialize the beacon when master mode is enabled.
+	 */
+	if (conf->type != IEEE80211_IF_TYPE_AP || !conf->beacon)
+		return 0;
+
+	status = rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
+		conf->beacon, conf->beacon_control);
+	if (status)
+		dev_kfree_skb(conf->beacon);
+
+	return status;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_config_interface);
+
+void rt2x00lib_set_multicast_list(struct ieee80211_hw *hw,
+	unsigned short flags, int mc_count)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+
+	/*
+	 * Promisc mode is forced on for Monitor interfaces.
+	 */
+	if (is_monitor_present(&rt2x00dev->interface))
+		return;
+
+	/*
+	 * Check if the new state is different then the old state.
+	 */
+	if (test_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags) ==
+	    (flags & IFF_PROMISC))
+		return;
+
+	rt2x00dev->interface.promisc = (flags & IFF_PROMISC);
+
+	/*
+	 * Schedule the link tuner if this does not run
+	 * automatically. The link tuner will be automatically
+	 * switched off when it is not required.
+	 */
+	if (!work_pending(&rt2x00dev->link.work.work))
+		queue_work(rt2x00dev->workqueue, &rt2x00dev->link.work.work);
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_set_multicast_list);
+
+int rt2x00lib_get_tx_stats(struct ieee80211_hw *hw,
+	struct ieee80211_tx_queue_stats *stats)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	unsigned int i;
+
+	for (i = 0; i < hw->queues; i++)
+		memcpy(&stats->data[i], &rt2x00dev->tx[i].stats,
+			sizeof(rt2x00dev->tx[i].stats));
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_get_tx_stats);
+
+int rt2x00lib_conf_tx(struct ieee80211_hw *hw, int queue,
+	const struct ieee80211_tx_queue_params *params)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	struct data_ring *ring;
+
+	ring = rt2x00_get_ring(rt2x00dev, queue);
+	if (unlikely(!ring))
+		return -EINVAL;
+
+	/*
+	 * The passed variables are stored as real value ((2^n)-1).
+	 * Ralink registers require to know the bit number 'n'.
+	 */
+	if (params->cw_min)
+		ring->tx_params.cw_min = fls(params->cw_min);
+	else
+		ring->tx_params.cw_min = 5; /* cw_min: 2^5 = 32. */
+
+	if (params->cw_max)
+		ring->tx_params.cw_max = fls(params->cw_max);
+	else
+		ring->tx_params.cw_max = 10; /* cw_min: 2^10 = 1024. */
+
+	if (params->aifs)
+		ring->tx_params.aifs = params->aifs;
+	else
+		ring->tx_params.aifs = 2;
+
+	INFO(rt2x00dev,
+		"Configured TX ring %d - CWmin: %d, CWmax: %d, Aifs: %d.\n",
+		queue, ring->tx_params.cw_min, ring->tx_params.cw_max,
+		ring->tx_params.aifs);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_conf_tx);