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linux/drivers/net/wireless/mediatek/mt76/mt76x2_phy_common.c
Lorenzo Bianconi 5f0d10ceee mt76: add mt76x2_phy_common to mt76x2-common module 
Move phy related code shared between mt76x2 and mt76x2u in
mt76x2-common module

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-08-02 21:48:14 +03:00

350 lines
9.0 KiB
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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 "mt76x2.h"
#include "mt76x2_eeprom.h"
static void
mt76x2_adjust_high_lna_gain(struct mt76x2_dev *dev, int reg, s8 offset)
{
s8 gain;
gain = FIELD_GET(MT_BBP_AGC_LNA_HIGH_GAIN, mt76_rr(dev, MT_BBP(AGC, reg)));
gain -= offset / 2;
mt76_rmw_field(dev, MT_BBP(AGC, reg), MT_BBP_AGC_LNA_HIGH_GAIN, gain);
}
static void
mt76x2_adjust_agc_gain(struct mt76x2_dev *dev, int reg, s8 offset)
{
s8 gain;
gain = FIELD_GET(MT_BBP_AGC_GAIN, mt76_rr(dev, MT_BBP(AGC, reg)));
gain += offset;
mt76_rmw_field(dev, MT_BBP(AGC, reg), MT_BBP_AGC_GAIN, gain);
}
void mt76x2_apply_gain_adj(struct mt76x2_dev *dev)
{
s8 *gain_adj = dev->cal.rx.high_gain;
mt76x2_adjust_high_lna_gain(dev, 4, gain_adj[0]);
mt76x2_adjust_high_lna_gain(dev, 5, gain_adj[1]);
mt76x2_adjust_agc_gain(dev, 8, gain_adj[0]);
mt76x2_adjust_agc_gain(dev, 9, gain_adj[1]);
}
EXPORT_SYMBOL_GPL(mt76x2_apply_gain_adj);
void mt76x2_phy_set_txpower_regs(struct mt76x2_dev *dev,
enum nl80211_band band)
{
u32 pa_mode[2];
u32 pa_mode_adj;
if (band == NL80211_BAND_2GHZ) {
pa_mode[0] = 0x010055ff;
pa_mode[1] = 0x00550055;
mt76_wr(dev, MT_TX_ALC_CFG_2, 0x35160a00);
mt76_wr(dev, MT_TX_ALC_CFG_3, 0x35160a06);
if (mt76x2_ext_pa_enabled(dev, band)) {
mt76_wr(dev, MT_RF_PA_MODE_ADJ0, 0x0000ec00);
mt76_wr(dev, MT_RF_PA_MODE_ADJ1, 0x0000ec00);
} else {
mt76_wr(dev, MT_RF_PA_MODE_ADJ0, 0xf4000200);
mt76_wr(dev, MT_RF_PA_MODE_ADJ1, 0xfa000200);
}
} else {
pa_mode[0] = 0x0000ffff;
pa_mode[1] = 0x00ff00ff;
if (mt76x2_ext_pa_enabled(dev, band)) {
mt76_wr(dev, MT_TX_ALC_CFG_2, 0x2f0f0400);
mt76_wr(dev, MT_TX_ALC_CFG_3, 0x2f0f0476);
} else {
mt76_wr(dev, MT_TX_ALC_CFG_2, 0x1b0f0400);
mt76_wr(dev, MT_TX_ALC_CFG_3, 0x1b0f0476);
}
if (mt76x2_ext_pa_enabled(dev, band))
pa_mode_adj = 0x04000000;
else
pa_mode_adj = 0;
mt76_wr(dev, MT_RF_PA_MODE_ADJ0, pa_mode_adj);
mt76_wr(dev, MT_RF_PA_MODE_ADJ1, pa_mode_adj);
}
mt76_wr(dev, MT_BB_PA_MODE_CFG0, pa_mode[0]);
mt76_wr(dev, MT_BB_PA_MODE_CFG1, pa_mode[1]);
mt76_wr(dev, MT_RF_PA_MODE_CFG0, pa_mode[0]);
mt76_wr(dev, MT_RF_PA_MODE_CFG1, pa_mode[1]);
if (mt76x2_ext_pa_enabled(dev, band)) {
u32 val;
if (band == NL80211_BAND_2GHZ)
val = 0x3c3c023c;
else
val = 0x363c023c;
mt76_wr(dev, MT_TX0_RF_GAIN_CORR, val);
mt76_wr(dev, MT_TX1_RF_GAIN_CORR, val);
mt76_wr(dev, MT_TX_ALC_CFG_4, 0x00001818);
} else {
if (band == NL80211_BAND_2GHZ) {
u32 val = 0x0f3c3c3c;
mt76_wr(dev, MT_TX0_RF_GAIN_CORR, val);
mt76_wr(dev, MT_TX1_RF_GAIN_CORR, val);
mt76_wr(dev, MT_TX_ALC_CFG_4, 0x00000606);
} else {
mt76_wr(dev, MT_TX0_RF_GAIN_CORR, 0x383c023c);
mt76_wr(dev, MT_TX1_RF_GAIN_CORR, 0x24282e28);
mt76_wr(dev, MT_TX_ALC_CFG_4, 0);
}
}
}
EXPORT_SYMBOL_GPL(mt76x2_phy_set_txpower_regs);
static void
mt76x2_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;
}
static u32
mt76x2_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;
}
static void
mt76x2_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;
}
static int
mt76x2_get_min_rate_power(struct mt76_rate_power *r)
{
int i;
s8 ret = 0;
for (i = 0; i < sizeof(r->all); i++) {
if (!r->all[i])
continue;
if (ret)
ret = min(ret, r->all[i]);
else
ret = r->all[i];
}
return ret;
}
void mt76x2_phy_set_txpower(struct mt76x2_dev *dev)
{
enum nl80211_chan_width width = dev->mt76.chandef.width;
struct ieee80211_channel *chan = dev->mt76.chandef.chan;
struct mt76x2_tx_power_info txp;
int txp_0, txp_1, delta = 0;
struct mt76_rate_power t = {};
int base_power, gain;
mt76x2_get_power_info(dev, &txp, chan);
if (width == NL80211_CHAN_WIDTH_40)
delta = txp.delta_bw40;
else if (width == NL80211_CHAN_WIDTH_80)
delta = txp.delta_bw80;
mt76x2_get_rate_power(dev, &t, chan);
mt76x2_add_rate_power_offset(&t, txp.chain[0].target_power);
mt76x2_limit_rate_power(&t, dev->txpower_conf);
dev->txpower_cur = mt76x2_get_max_rate_power(&t);
base_power = mt76x2_get_min_rate_power(&t);
delta += base_power - txp.chain[0].target_power;
txp_0 = txp.chain[0].target_power + txp.chain[0].delta + delta;
txp_1 = txp.chain[1].target_power + txp.chain[1].delta + delta;
gain = min(txp_0, txp_1);
if (gain < 0) {
base_power -= gain;
txp_0 -= gain;
txp_1 -= gain;
} else if (gain > 0x2f) {
base_power -= gain - 0x2f;
txp_0 = 0x2f;
txp_1 = 0x2f;
}
mt76x2_add_rate_power_offset(&t, -base_power);
dev->target_power = txp.chain[0].target_power;
dev->target_power_delta[0] = txp_0 - txp.chain[0].target_power;
dev->target_power_delta[1] = txp_1 - txp.chain[0].target_power;
dev->rate_power = t;
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,
mt76x2_tx_power_mask(t.cck[0], t.cck[2], t.ofdm[0], t.ofdm[2]));
mt76_wr(dev, MT_TX_PWR_CFG_1,
mt76x2_tx_power_mask(t.ofdm[4], t.ofdm[6], t.ht[0], t.ht[2]));
mt76_wr(dev, MT_TX_PWR_CFG_2,
mt76x2_tx_power_mask(t.ht[4], t.ht[6], t.ht[8], t.ht[10]));
mt76_wr(dev, MT_TX_PWR_CFG_3,
mt76x2_tx_power_mask(t.ht[12], t.ht[14], t.ht[0], t.ht[2]));
mt76_wr(dev, MT_TX_PWR_CFG_4,
mt76x2_tx_power_mask(t.ht[4], t.ht[6], 0, 0));
mt76_wr(dev, MT_TX_PWR_CFG_7,
mt76x2_tx_power_mask(t.ofdm[6], t.vht[8], t.ht[6], t.vht[8]));
mt76_wr(dev, MT_TX_PWR_CFG_8,
mt76x2_tx_power_mask(t.ht[14], t.vht[8], t.vht[8], 0));
mt76_wr(dev, MT_TX_PWR_CFG_9,
mt76x2_tx_power_mask(t.ht[6], t.vht[8], t.vht[8], 0));
}
EXPORT_SYMBOL_GPL(mt76x2_phy_set_txpower);
void mt76x2_configure_tx_delay(struct mt76x2_dev *dev,
enum nl80211_band band, u8 bw)
{
u32 cfg0, cfg1;
if (mt76x2_ext_pa_enabled(dev, band)) {
cfg0 = bw ? 0x000b0c01 : 0x00101101;
cfg1 = 0x00011414;
} else {
cfg0 = bw ? 0x000b0b01 : 0x00101001;
cfg1 = 0x00021414;
}
mt76_wr(dev, MT_TX_SW_CFG0, cfg0);
mt76_wr(dev, MT_TX_SW_CFG1, cfg1);
mt76_rmw_field(dev, MT_XIFS_TIME_CFG, MT_XIFS_TIME_CFG_OFDM_SIFS, 15);
}
EXPORT_SYMBOL_GPL(mt76x2_configure_tx_delay);
void mt76x2_phy_set_bw(struct mt76x2_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(mt76x2_phy_set_bw);
void mt76x2_phy_set_band(struct mt76x2_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(mt76x2_phy_set_band);
int mt76x2_phy_get_min_avg_rssi(struct mt76x2_dev *dev)
{
struct mt76x2_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->wcid_mask); i++) {
unsigned long mask = dev->wcid_mask[i];
if (!mask)
continue;
for (j = i * BITS_PER_LONG; mask; j++, mask >>= 1) {
if (!(mask & 1))
continue;
wcid = rcu_dereference(dev->wcid[j]);
if (!wcid)
continue;
sta = container_of(wcid, struct mt76x2_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(mt76x2_phy_get_min_avg_rssi);
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