[RT2x00]: add driver for Ralink wireless hardware
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
new file mode 100644
index 0000000..778ed41
--- /dev/null
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -0,0 +1,459 @@
+/*
+ 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: rt2x00mac
+ Abstract: rt2x00 generic mac80211 routines.
+ */
+
+/*
+ * Set enviroment defines for rt2x00.h
+ */
+#define DRV_NAME "rt2x00lib"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "rt2x00.h"
+#include "rt2x00lib.h"
+
+static int rt2x00mac_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, rt2x00dev->interface.id,
+ frag_skb->data, frag_skb->len, control,
+ (struct ieee80211_cts *)(skb->data));
+ else
+ ieee80211_rts_get(rt2x00dev->hw, rt2x00dev->interface.id,
+ 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 rt2x00mac_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 = rt2x00lib_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 (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) &&
+ (control->flags & (IEEE80211_TXCTL_USE_RTS_CTS |
+ IEEE80211_TXCTL_USE_CTS_PROTECT))) {
+ if (rt2x00_ring_free(ring) <= 1)
+ return NETDEV_TX_BUSY;
+
+ if (rt2x00mac_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(rt2x00mac_tx);
+
+int rt2x00mac_start(struct ieee80211_hw *hw)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+ int status;
+
+ if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+ return 0;
+
+ /*
+ * If this is the first interface which is added,
+ * we should load the firmware now.
+ */
+ if (test_bit(REQUIRE_FIRMWARE, &rt2x00dev->flags)) {
+ status = rt2x00lib_load_firmware(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(rt2x00mac_start);
+
+void rt2x00mac_stop(struct ieee80211_hw *hw)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+
+ /*
+ * Perhaps we can add something smarter here,
+ * but for now just disabling the radio should do.
+ */
+ rt2x00lib_disable_radio(rt2x00dev);
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_stop);
+
+int rt2x00mac_add_interface(struct ieee80211_hw *hw,
+ struct ieee80211_if_init_conf *conf)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+ struct interface *intf = &rt2x00dev->interface;
+ int retval;
+
+ /*
+ * We only support 1 non-monitor interface.
+ */
+ if (conf->type != IEEE80211_IF_TYPE_MNTR && is_interface_present(intf))
+ return -ENOBUFS;
+
+ /*
+ * HACK: Placeholder until start/stop handler has been
+ * added to the mac80211 callback functions structure.
+ */
+ retval = rt2x00mac_start(hw);
+ if (retval)
+ return retval;
+
+ /*
+ * 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);
+ memcpy(&intf->mac, conf->mac_addr, ETH_ALEN);
+ intf->filter = 0;
+ }
+
+ /*
+ * Configure interface.
+ * The MAC adddress must be configured after the device
+ * has been initialized. Else the device can reset the
+ * MAC registers.
+ */
+ rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
+ rt2x00lib_config_type(rt2x00dev, conf->type);
+ rt2x00lib_config_packet_filter(rt2x00dev, intf->filter);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
+
+void rt2x00mac_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(intf))
+ return;
+
+ /*
+ * When removing an monitor interface, decrease monitor_count.
+ * For non-monitor interfaces, all interface data needs to be reset.
+ */
+ if (conf->type == IEEE80211_IF_TYPE_MNTR) {
+ intf->monitor_count--;
+ } else if (intf->type == conf->type) {
+ intf->id = 0;
+ intf->type = INVALID_INTERFACE;
+ memset(&intf->bssid, 0x00, ETH_ALEN);
+ memset(&intf->mac, 0x00, ETH_ALEN);
+ intf->filter = 0;
+ }
+
+ /*
+ * Make sure the bssid and mac address registers
+ * are cleared to prevent false ACKing of frames.
+ */
+ rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
+ rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
+ rt2x00lib_config_type(rt2x00dev, intf->type);
+
+ /*
+ * HACK: Placeholder untill start/stop handler has been
+ * added to the mac80211 callback functions structure.
+ */
+ rt2x00mac_stop(hw);
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
+
+int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+
+ /*
+ * If the device is not initialized we shouldn't accept
+ * any configuration changes. Mac80211 might be calling
+ * this function while we are trying to remove the device
+ * or perhaps suspending it.
+ */
+ if (!test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+ return 0;
+
+ /*
+ * 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(rt2x00dev, conf);
+
+ /*
+ * If promisc mode cannot be configured in irq context,
+ * then it is now the time to configure it.
+ */
+ if (test_bit(PACKET_FILTER_SCHEDULED, &rt2x00dev->flags))
+ rt2x00lib_config_packet_filter(rt2x00dev,
+ rt2x00dev->interface.filter);
+
+ /*
+ * 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(rt2x00mac_config);
+
+int rt2x00mac_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;
+
+ /*
+ * If the device is not initialized we shouldn't accept
+ * any configuration changes. Mac80211 might be calling
+ * this function while we are trying to remove the device
+ * or perhaps suspending it.
+ */
+ if (!test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+ return 0;
+
+ /*
+ * 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);
+ rt2x00lib_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(rt2x00mac_config_interface);
+
+void rt2x00mac_set_multicast_list(struct ieee80211_hw *hw,
+ unsigned short flags, int mc_count)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+
+ /*
+ * Check if the new state is different then the old state.
+ */
+ if (rt2x00dev->interface.filter == flags)
+ return;
+
+ rt2x00dev->interface.filter = flags;
+
+ /*
+ * Raise the pending bit to indicate the
+ * packet filter should be updated.
+ */
+ __set_bit(PACKET_FILTER_PENDING, &rt2x00dev->flags);
+
+ /*
+ * Check if Packet filter actions are allowed in
+ * atomic context. If not, raise the pending flag and
+ * let it be.
+ */
+ if (!test_bit(PACKET_FILTER_SCHEDULED, &rt2x00dev->flags) ||
+ !in_atomic())
+ rt2x00lib_config_packet_filter(rt2x00dev, flags);
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_set_multicast_list);
+
+int rt2x00mac_get_stats(struct ieee80211_hw *hw,
+ struct ieee80211_low_level_stats *stats)
+{
+ struct rt2x00_dev *rt2x00dev = hw->priv;
+
+ /*
+ * The dot11ACKFailureCount, dot11RTSFailureCount and
+ * dot11RTSSuccessCount are updated in interrupt time.
+ * dot11FCSErrorCount is updated in the link tuner.
+ */
+ memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
+
+int rt2x00mac_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(rt2x00mac_get_tx_stats);
+
+int rt2x00mac_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 = rt2x00lib_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(rt2x00mac_conf_tx);