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/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
* Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "mt76x02.h"
const u16 mt76x02_beacon_offsets[16] = {
/* 1024 byte per beacon */
0xc000,
0xc400,
0xc800,
0xcc00,
0xd000,
0xd400,
0xd800,
0xdc00,
/* BSS idx 8-15 not used for beacons */
0xc000,
0xc000,
0xc000,
0xc000,
0xc000,
0xc000,
0xc000,
0xc000,
};
static void mt76x02_set_beacon_offsets(struct mt76x02_dev *dev)
{
u16 val, base = MT_BEACON_BASE;
u32 regs[4] = {};
int i;
for (i = 0; i < 16; i++) {
val = mt76x02_beacon_offsets[i] - base;
regs[i / 4] |= (val / 64) << (8 * (i % 4));
}
for (i = 0; i < 4; i++)
mt76_wr(dev, MT_BCN_OFFSET(i), regs[i]);
}
static int
mt76x02_write_beacon(struct mt76x02_dev *dev, int offset, struct sk_buff *skb)
{
int beacon_len = mt76x02_beacon_offsets[1] - mt76x02_beacon_offsets[0];
struct mt76x02_txwi txwi;
if (WARN_ON_ONCE(beacon_len < skb->len + sizeof(struct mt76x02_txwi)))
return -ENOSPC;
mt76x02_mac_write_txwi(dev, &txwi, skb, NULL, NULL, skb->len);
mt76_wr_copy(dev, offset, &txwi, sizeof(txwi));
offset += sizeof(txwi);
mt76_wr_copy(dev, offset, skb->data, skb->len);
return 0;
}
static int
__mt76x02_mac_set_beacon(struct mt76x02_dev *dev, u8 bcn_idx,
struct sk_buff *skb)
{
int beacon_len = mt76x02_beacon_offsets[1] - mt76x02_beacon_offsets[0];
int beacon_addr = mt76x02_beacon_offsets[bcn_idx];
int ret = 0;
int i;
/* Prevent corrupt transmissions during update */
mt76_set(dev, MT_BCN_BYPASS_MASK, BIT(bcn_idx));
if (skb) {
ret = mt76x02_write_beacon(dev, beacon_addr, skb);
if (!ret)
dev->beacon_data_mask |= BIT(bcn_idx);
} else {
dev->beacon_data_mask &= ~BIT(bcn_idx);
for (i = 0; i < beacon_len; i += 4)
mt76_wr(dev, beacon_addr + i, 0);
}
mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xff00 | ~dev->beacon_data_mask);
return ret;
}
int mt76x02_mac_set_beacon(struct mt76x02_dev *dev, u8 vif_idx,
struct sk_buff *skb)
{
bool force_update = false;
int bcn_idx = 0;
int i;
for (i = 0; i < ARRAY_SIZE(dev->beacons); i++) {
if (vif_idx == i) {
force_update = !!dev->beacons[i] ^ !!skb;
if (dev->beacons[i])
dev_kfree_skb(dev->beacons[i]);
dev->beacons[i] = skb;
__mt76x02_mac_set_beacon(dev, bcn_idx, skb);
} else if (force_update && dev->beacons[i]) {
__mt76x02_mac_set_beacon(dev, bcn_idx,
dev->beacons[i]);
}
bcn_idx += !!dev->beacons[i];
}
for (i = bcn_idx; i < ARRAY_SIZE(dev->beacons); i++) {
if (!(dev->beacon_data_mask & BIT(i)))
break;
__mt76x02_mac_set_beacon(dev, i, NULL);
}
mt76_rmw_field(dev, MT_MAC_BSSID_DW1, MT_MAC_BSSID_DW1_MBEACON_N,
bcn_idx - 1);
return 0;
}
static void
__mt76x02_mac_set_beacon_enable(struct mt76x02_dev *dev, u8 vif_idx,
bool val, struct sk_buff *skb)
{
u8 old_mask = dev->beacon_mask;
bool en;
u32 reg;
if (val) {
dev->beacon_mask |= BIT(vif_idx);
if (skb)
mt76x02_mac_set_beacon(dev, vif_idx, skb);
} else {
dev->beacon_mask &= ~BIT(vif_idx);
mt76x02_mac_set_beacon(dev, vif_idx, NULL);
}
if (!!old_mask == !!dev->beacon_mask)
return;
en = dev->beacon_mask;
reg = MT_BEACON_TIME_CFG_BEACON_TX |
MT_BEACON_TIME_CFG_TBTT_EN |
MT_BEACON_TIME_CFG_TIMER_EN;
mt76_rmw(dev, MT_BEACON_TIME_CFG, reg, reg * en);
dev->beacon_ops->beacon_enable(dev, en);
}
void mt76x02_mac_set_beacon_enable(struct mt76x02_dev *dev,
struct ieee80211_vif *vif, bool val)
{
u8 vif_idx = ((struct mt76x02_vif *)vif->drv_priv)->idx;
struct sk_buff *skb = NULL;
dev->beacon_ops->pre_tbtt_enable(dev, false);
if (mt76_is_usb(dev))
skb = ieee80211_beacon_get(mt76_hw(dev), vif);
if (!dev->beacon_mask)
dev->tbtt_count = 0;
__mt76x02_mac_set_beacon_enable(dev, vif_idx, val, skb);
dev->beacon_ops->pre_tbtt_enable(dev, true);
}
void mt76x02_init_beacon_config(struct mt76x02_dev *dev)
{
int i;
mt76_clear(dev, MT_BEACON_TIME_CFG, (MT_BEACON_TIME_CFG_TIMER_EN |
MT_BEACON_TIME_CFG_TBTT_EN |
MT_BEACON_TIME_CFG_BEACON_TX));
mt76_set(dev, MT_BEACON_TIME_CFG, MT_BEACON_TIME_CFG_SYNC_MODE);
mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xffff);
for (i = 0; i < 8; i++)
mt76x02_mac_set_beacon(dev, i, NULL);
mt76x02_set_beacon_offsets(dev);
}
EXPORT_SYMBOL_GPL(mt76x02_init_beacon_config);
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