/*
* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
*
* 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
*
* 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.
*/
#include "mt7601u.h"
#include "mac.h"
#include <linux/etherdevice.h>
#include <linux/version.h>
static int mt7601u_start(struct ieee80211_hw *hw)
{
struct mt7601u_dev *dev = hw->priv;
int ret;
mutex_lock(&dev->mutex);
ret = mt7601u_mac_start(dev);
if (ret)
goto out;
ieee80211_queue_delayed_work(dev->hw, &dev->mac_work,
MT_CALIBRATE_INTERVAL);
ieee80211_queue_delayed_work(dev->hw, &dev->cal_work,
MT_CALIBRATE_INTERVAL);
out:
mutex_unlock(&dev->mutex);
return ret;
}
static void mt7601u_stop(struct ieee80211_hw *hw)
{
struct mt7601u_dev *dev = hw->priv;
mutex_lock(&dev->mutex);
cancel_delayed_work_sync(&dev->cal_work);
cancel_delayed_work_sync(&dev->mac_work);
mt7601u_mac_stop(dev);
mutex_unlock(&dev->mutex);
}
static int mt7601u_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct mt7601u_dev *dev = hw->priv;
struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
unsigned int idx = 0;
unsigned int wcid = GROUP_WCID(idx);
/* Note: for AP do the AP-STA things mt76 does:
* - beacon offsets
* - do mac address tricks
* - shift vif idx
*/
mvif->idx = idx;
if (dev->wcid_mask[wcid / BITS_PER_LONG] & BIT(wcid % BITS_PER_LONG))
return -ENOSPC;
dev->wcid_mask[wcid / BITS_PER_LONG] |= BIT(wcid % BITS_PER_LONG);
mvif->group_wcid.idx = wcid;
mvif->group_wcid.hw_key_idx = -1;
return 0;
}
static void mt7601u_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct mt7601u_dev *dev = hw->priv;
struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
unsigned int wcid = mvif->group_wcid.idx;
dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG);
}
static int mt7601u_config(struct ieee80211_hw *hw, u32 changed)
{
struct mt7601u_dev *dev = hw->priv;
int ret = 0;
mutex_lock(&dev->mutex);
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
ieee80211_stop_queues(hw);
ret = mt7601u_phy_set_channel(dev, &hw->conf.chandef);
ieee80211_wake_queues(hw);
}
mutex_unlock(&dev->mutex);
return ret;
}
static void
mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
unsigned int *total_flags, u64 multicast)
{
struct mt7601u_dev *dev = hw->priv;
u32 flags = 0;
#define MT76_FILTER(_flag, _hw) do { \
flags |= *total_flags & FIF_##_flag; \
dev->rxfilter &= ~(_hw); \
dev->rxfilter |= !(flags & FIF_##_flag) * (_hw); \
} while (0)
mutex_lock(&dev->mutex);
dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
MT76_FILTER(OTHER_BSS, MT_RX_FILTR_CFG_PROMISC);
MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
MT_RX_FILTR_CFG_CTS |
MT_RX_FILTR_CFG_CFEND |
MT_RX_FILTR_CFG_CFACK |
MT_RX_FILTR_CFG_BA |
MT_RX_FILTR_CFG_CTRL_RSV);
MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
*total_flags = flags;
mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
mutex_unlock(&dev->mutex);
}
static void
mt7601u_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *info, u32 changed)
{
struct mt7601u_dev *dev = hw->priv;
mutex_lock(&dev->mutex);
if (changed & BSS_CHANGED_ASSOC)
mt7601u_phy_con_cal_onoff(dev, info);
if (changed & BSS_CHANGED_BSSID) {
mt7601u_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid);
/* Note: this is a hack because beacon_int is not changed
* on leave nor is any more appropriate event generated.
* rt2x00 doesn't seem to be bothered though.
*/
if (is_zero_ether_addr(info->bssid))
mt7601u_mac_config_tsf(dev, false, 0);
}
if (changed & BSS_CHANGED_BASIC_RATES) {
mt7601u_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates);
mt7601u_wr(dev, MT_HT_FBK_CFG0, 0x65432100);
mt7601u_wr(dev, MT_HT_FBK_CFG1, 0xedcba980);
mt7601u_wr(dev, MT_LG_FBK_CFG0, 0xedcba988);
mt7601u_wr(dev, MT_LG_FBK_CFG1, 0x00002100);
}
if (changed & BSS_CHANGED_BEACON_INT)
mt7601u_mac_config_tsf(dev, true, info->beacon_int);
if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
mt7601u_mac_set_protection(dev, info->use_cts_prot,
info->ht_operation_mode);
if (changed & BSS_CHANGED_ERP_PREAMBLE)
mt7601u_mac_set_short_preamble(dev, info->use_short_preamble);
if (changed & BSS_CHANGED_ERP_SLOT) {
int slottime = info->use_short_slot ? 9 : 20;
mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
}
if (changed & BSS_CHANGED_ASSOC)
mt7601u_phy_recalibrate_after_assoc(dev);
mutex_unlock(&dev->mutex);
}
static int
mt76_wcid_alloc(struct mt7601u_dev *dev)
{
int i, idx = 0;
for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
idx = ffs(~dev->wcid_mask[i]);
if (!idx)
continue;
idx--;
dev->wcid_mask[i] |= BIT(idx);
break;
}
idx = i * BITS_PER_LONG + idx;
if (idx > 119)
return -1;
return idx;
}
static int
mt7601u_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct mt7601u_dev *dev = hw->priv;
struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
int ret = 0;
int idx = 0;
mutex_lock(&dev->mutex);
idx = mt76_wcid_alloc(dev);
if (idx < 0) {
ret = -ENOSPC;
goto out;
}
msta->wcid.idx = idx;
msta->wcid.hw_key_idx = -1;
mt7601u_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
mt7601u_mac_set_ampdu_factor(dev);
out:
mutex_unlock(&dev->mutex);
return ret;
}
static int
mt7601u_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct mt7601u_dev *dev = hw->priv;
struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
int idx = msta->wcid.idx;
mutex_lock(&dev->mutex);
rcu_assign_pointer(dev->wcid[idx], NULL);
mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG);
mt7601u_mac_wcid_setup(dev, idx, 0, NULL);
mt7601u_mac_set_ampdu_factor(dev);
mutex_unlock(&dev->mutex);
return 0;
}
static void
mt7601u_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
enum sta_notify_cmd cmd, struct ieee80211_sta *sta)
{
}
static void
mt7601u_sw_scan(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const u8 *mac_addr)
{
struct mt7601u_dev *dev = hw->priv;
mt7601u_agc_save(dev);
set_bit(MT7601U_STATE_SCANNING, &dev->state);
}
static void
mt7601u_sw_scan_complete(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct mt7601u_dev *dev = hw->priv;
mt7601u_agc_restore(dev);
clear_bit(MT7601U_STATE_SCANNING, &dev->state);
}
static int
mt7601u_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
struct ieee80211_vif *vif, struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct mt7601u_dev *dev = hw->priv;
struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL;
struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid;
int idx = key->keyidx;
int ret;
if (cmd == SET_KEY) {
key->hw_key_idx = wcid->idx;
wcid->hw_key_idx = idx;
} else {
if (idx == wcid->hw_key_idx)
wcid->hw_key_idx = -1;
key = NULL;
}
if (!msta) {
if (key || wcid->hw_key_idx == idx) {
ret = mt76_mac_wcid_set_key(dev, wcid->idx, key);
if (ret)
return ret;
}
return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key);
}
return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key);
}
static int mt7601u_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
struct mt7601u_dev *dev = hw->priv;
mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value);
return 0;
}
static int
mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_ampdu_params *params)
{
struct mt7601u_dev *dev = hw->priv;
struct ieee80211_sta *sta = params->sta;
enum ieee80211_ampdu_mlme_action action = params->action;
u16 tid = params->tid;
u16 *ssn = ¶ms->ssn;
struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
WARN_ON(msta->wcid.idx > GROUP_WCID(0));
switch (action) {
case IEEE80211_AMPDU_RX_START:
mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
break;
case IEEE80211_AMPDU_RX_STOP:
mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
BIT(16 + tid));
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]);
break;
case IEEE80211_AMPDU_TX_STOP_FLUSH:
case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
break;
case IEEE80211_AMPDU_TX_START:
msta->agg_ssn[tid] = *ssn << 4;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
case IEEE80211_AMPDU_TX_STOP_CONT:
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
}
return 0;
}
static void
mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct mt7601u_dev *dev = hw->priv;
struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
struct ieee80211_sta_rates *rates;
struct ieee80211_tx_rate rate = {};
rcu_read_lock();
rates = rcu_dereference(sta->rates);
if (!rates)
goto out;
rate.idx = rates->rate[0].idx;
rate.flags = rates->rate[0].flags;
mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate);
out:
rcu_read_unlock();
}
const struct ieee80211_ops mt7601u_ops = {
.tx = mt7601u_tx,
.start = mt7601u_start,
.stop = mt7601u_stop,
.add_interface = mt7601u_add_interface,
.remove_interface = mt7601u_remove_interface,
.config = mt7601u_config,
.configure_filter = mt76_configure_filter,
.bss_info_changed = mt7601u_bss_info_changed,
.sta_add = mt7601u_sta_add,
.sta_remove = mt7601u_sta_remove,
.sta_notify = mt7601u_sta_notify,
.set_key = mt7601u_set_key,
.conf_tx = mt7601u_conf_tx,
.sw_scan_start = mt7601u_sw_scan,
.sw_scan_complete = mt7601u_sw_scan_complete,
.ampdu_action = mt76_ampdu_action,
.sta_rate_tbl_update = mt76_sta_rate_tbl_update,
.set_rts_threshold = mt7601u_set_rts_threshold,
};