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/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* 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 <linux/kernel.h>
#include "mt76x02.h"
#include "mt76x02_phy.h"
void mt76x02_phy_set_rxpath(struct mt76x02_dev *dev)
{
u32 val;
val = mt76_rr(dev, MT_BBP(AGC, 0));
val &= ~BIT(4);
switch (dev->mt76.chainmask & 0xf) {
case 2:
val |= BIT(3);
break;
default:
val &= ~BIT(3);
break;
}
mt76_wr(dev, MT_BBP(AGC, 0), val);
mb();
val = mt76_rr(dev, MT_BBP(AGC, 0));
}
EXPORT_SYMBOL_GPL(mt76x02_phy_set_rxpath);
void mt76x02_phy_set_txdac(struct mt76x02_dev *dev)
{
int txpath;
txpath = (dev->mt76.chainmask >> 8) & 0xf;
switch (txpath) {
case 2:
mt76_set(dev, MT_BBP(TXBE, 5), 0x3);
break;
default:
mt76_clear(dev, MT_BBP(TXBE, 5), 0x3);
break;
}
}
EXPORT_SYMBOL_GPL(mt76x02_phy_set_txdac);
static u32
mt76x02_tx_power_mask(u8 v1, u8 v2, u8 v3, u8 v4)
{
u32 val = 0;
val |= (v1 & (BIT(6) - 1)) << 0;
val |= (v2 & (BIT(6) - 1)) << 8;
val |= (v3 & (BIT(6) - 1)) << 16;
val |= (v4 & (BIT(6) - 1)) << 24;
return val;
}
int mt76x02_get_max_rate_power(struct mt76_rate_power *r)
{
s8 ret = 0;
int i;
for (i = 0; i < sizeof(r->all); i++)
ret = max(ret, r->all[i]);
return ret;
}
EXPORT_SYMBOL_GPL(mt76x02_get_max_rate_power);
void mt76x02_limit_rate_power(struct mt76_rate_power *r, int limit)
{
int i;
for (i = 0; i < sizeof(r->all); i++)
if (r->all[i] > limit)
r->all[i] = limit;
}
EXPORT_SYMBOL_GPL(mt76x02_limit_rate_power);
void mt76x02_add_rate_power_offset(struct mt76_rate_power *r, int offset)
{
int i;
for (i = 0; i < sizeof(r->all); i++)
r->all[i] += offset;
}
EXPORT_SYMBOL_GPL(mt76x02_add_rate_power_offset);
void mt76x02_phy_set_txpower(struct mt76x02_dev *dev, int txp_0, int txp_1)
{
struct mt76_rate_power *t = &dev->mt76.rate_power;
mt76_rmw_field(dev, MT_TX_ALC_CFG_0, MT_TX_ALC_CFG_0_CH_INIT_0, txp_0);
mt76_rmw_field(dev, MT_TX_ALC_CFG_0, MT_TX_ALC_CFG_0_CH_INIT_1, txp_1);
mt76_wr(dev, MT_TX_PWR_CFG_0,
mt76x02_tx_power_mask(t->cck[0], t->cck[2], t->ofdm[0],
t->ofdm[2]));
mt76_wr(dev, MT_TX_PWR_CFG_1,
mt76x02_tx_power_mask(t->ofdm[4], t->ofdm[6], t->ht[0],
t->ht[2]));
mt76_wr(dev, MT_TX_PWR_CFG_2,
mt76x02_tx_power_mask(t->ht[4], t->ht[6], t->ht[8],
t->ht[10]));
mt76_wr(dev, MT_TX_PWR_CFG_3,
mt76x02_tx_power_mask(t->ht[12], t->ht[14], t->stbc[0],
t->stbc[2]));
mt76_wr(dev, MT_TX_PWR_CFG_4,
mt76x02_tx_power_mask(t->stbc[4], t->stbc[6], 0, 0));
mt76_wr(dev, MT_TX_PWR_CFG_7,
mt76x02_tx_power_mask(t->ofdm[7], t->vht[8], t->ht[7],
t->vht[9]));
mt76_wr(dev, MT_TX_PWR_CFG_8,
mt76x02_tx_power_mask(t->ht[14], 0, t->vht[8], t->vht[9]));
mt76_wr(dev, MT_TX_PWR_CFG_9,
mt76x02_tx_power_mask(t->ht[7], 0, t->stbc[8], t->stbc[9]));
}
EXPORT_SYMBOL_GPL(mt76x02_phy_set_txpower);
int mt76x02_phy_get_min_avg_rssi(struct mt76x02_dev *dev)
{
struct mt76x02_sta *sta;
struct mt76_wcid *wcid;
int i, j, min_rssi = 0;
s8 cur_rssi;
local_bh_disable();
rcu_read_lock();
for (i = 0; i < ARRAY_SIZE(dev->mt76.wcid_mask); i++) {
unsigned long mask = dev->mt76.wcid_mask[i];
if (!mask)
continue;
for (j = i * BITS_PER_LONG; mask; j++, mask >>= 1) {
if (!(mask & 1))
continue;
wcid = rcu_dereference(dev->mt76.wcid[j]);
if (!wcid)
continue;
sta = container_of(wcid, struct mt76x02_sta, wcid);
spin_lock(&dev->mt76.rx_lock);
if (sta->inactive_count++ < 5)
cur_rssi = ewma_signal_read(&sta->rssi);
else
cur_rssi = 0;
spin_unlock(&dev->mt76.rx_lock);
if (cur_rssi < min_rssi)
min_rssi = cur_rssi;
}
}
rcu_read_unlock();
local_bh_enable();
if (!min_rssi)
return -75;
return min_rssi;
}
EXPORT_SYMBOL_GPL(mt76x02_phy_get_min_avg_rssi);
void mt76x02_phy_set_bw(struct mt76x02_dev *dev, int width, u8 ctrl)
{
int core_val, agc_val;
switch (width) {
case NL80211_CHAN_WIDTH_80:
core_val = 3;
agc_val = 7;
break;
case NL80211_CHAN_WIDTH_40:
core_val = 2;
agc_val = 3;
break;
default:
core_val = 0;
agc_val = 1;
break;
}
mt76_rmw_field(dev, MT_BBP(CORE, 1), MT_BBP_CORE_R1_BW, core_val);
mt76_rmw_field(dev, MT_BBP(AGC, 0), MT_BBP_AGC_R0_BW, agc_val);
mt76_rmw_field(dev, MT_BBP(AGC, 0), MT_BBP_AGC_R0_CTRL_CHAN, ctrl);
mt76_rmw_field(dev, MT_BBP(TXBE, 0), MT_BBP_TXBE_R0_CTRL_CHAN, ctrl);
}
EXPORT_SYMBOL_GPL(mt76x02_phy_set_bw);
void mt76x02_phy_set_band(struct mt76x02_dev *dev, int band,
bool primary_upper)
{
switch (band) {
case NL80211_BAND_2GHZ:
mt76_set(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_2G);
mt76_clear(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_5G);
break;
case NL80211_BAND_5GHZ:
mt76_clear(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_2G);
mt76_set(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_5G);
break;
}
mt76_rmw_field(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_UPPER_40M,
primary_upper);
}
EXPORT_SYMBOL_GPL(mt76x02_phy_set_band);
bool mt76x02_phy_adjust_vga_gain(struct mt76x02_dev *dev)
{
u8 limit = dev->cal.low_gain > 0 ? 16 : 4;
bool ret = false;
u32 false_cca;
false_cca = FIELD_GET(MT_RX_STAT_1_CCA_ERRORS, mt76_rr(dev, MT_RX_STAT_1));
dev->cal.false_cca = false_cca;
if (false_cca > 800 && dev->cal.agc_gain_adjust < limit) {
dev->cal.agc_gain_adjust += 2;
ret = true;
} else if ((false_cca < 10 && dev->cal.agc_gain_adjust > 0) ||
(dev->cal.agc_gain_adjust >= limit && false_cca < 500)) {
dev->cal.agc_gain_adjust -= 2;
ret = true;
}
return ret;
}
EXPORT_SYMBOL_GPL(mt76x02_phy_adjust_vga_gain);
void mt76x02_init_agc_gain(struct mt76x02_dev *dev)
{
dev->cal.agc_gain_init[0] = mt76_get_field(dev, MT_BBP(AGC, 8),
MT_BBP_AGC_GAIN);
dev->cal.agc_gain_init[1] = mt76_get_field(dev, MT_BBP(AGC, 9),
MT_BBP_AGC_GAIN);
memcpy(dev->cal.agc_gain_cur, dev->cal.agc_gain_init,
sizeof(dev->cal.agc_gain_cur));
dev->cal.low_gain = -1;
dev->cal.gain_init_done = true;
}
EXPORT_SYMBOL_GPL(mt76x02_init_agc_gain);
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