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phy.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* (c) Copyright 2002-2010, Ralink Technology, Inc.
* Copyright (C) 2014 Felix Fietkau <[email protected]>
* Copyright (C) 2015 Jakub Kicinski <[email protected]>
*/
#include "mt7601u.h"
#include "mcu.h"
#include "eeprom.h"
#include "trace.h"
#include "initvals_phy.h"
#include <linux/etherdevice.h>
static void mt7601u_agc_reset(struct mt7601u_dev *dev);
static int
mt7601u_rf_wr(struct mt7601u_dev *dev, u8 bank, u8 offset, u8 value)
{
int ret = 0;
if (WARN_ON(!test_bit(MT7601U_STATE_WLAN_RUNNING, &dev->state)) ||
WARN_ON(offset > 63))
return -EINVAL;
if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
return 0;
mutex_lock(&dev->reg_atomic_mutex);
if (!mt76_poll(dev, MT_RF_CSR_CFG, MT_RF_CSR_CFG_KICK, 0, 100)) {
ret = -ETIMEDOUT;
goto out;
}
mt7601u_wr(dev, MT_RF_CSR_CFG,
FIELD_PREP(MT_RF_CSR_CFG_DATA, value) |
FIELD_PREP(MT_RF_CSR_CFG_REG_BANK, bank) |
FIELD_PREP(MT_RF_CSR_CFG_REG_ID, offset) |
MT_RF_CSR_CFG_WR |
MT_RF_CSR_CFG_KICK);
trace_rf_write(dev, bank, offset, value);
out:
mutex_unlock(&dev->reg_atomic_mutex);
if (ret < 0)
dev_err(dev->dev, "Error: RF write %02hhx:%02hhx failed:%d!!\n",
bank, offset, ret);
return ret;
}
static int
mt7601u_rf_rr(struct mt7601u_dev *dev, u8 bank, u8 offset)
{
int ret = -ETIMEDOUT;
u32 val;
if (WARN_ON(!test_bit(MT7601U_STATE_WLAN_RUNNING, &dev->state)) ||
WARN_ON(offset > 63))
return -EINVAL;
if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
return 0xff;
mutex_lock(&dev->reg_atomic_mutex);
if (!mt76_poll(dev, MT_RF_CSR_CFG, MT_RF_CSR_CFG_KICK, 0, 100))
goto out;
mt7601u_wr(dev, MT_RF_CSR_CFG,
FIELD_PREP(MT_RF_CSR_CFG_REG_BANK, bank) |
FIELD_PREP(MT_RF_CSR_CFG_REG_ID, offset) |
MT_RF_CSR_CFG_KICK);
if (!mt76_poll(dev, MT_RF_CSR_CFG, MT_RF_CSR_CFG_KICK, 0, 100))
goto out;
val = mt7601u_rr(dev, MT_RF_CSR_CFG);
if (FIELD_GET(MT_RF_CSR_CFG_REG_ID, val) == offset &&
FIELD_GET(MT_RF_CSR_CFG_REG_BANK, val) == bank) {
ret = FIELD_GET(MT_RF_CSR_CFG_DATA, val);
trace_rf_read(dev, bank, offset, ret);
}
out:
mutex_unlock(&dev->reg_atomic_mutex);
if (ret < 0)
dev_err(dev->dev, "Error: RF read %02hhx:%02hhx failed:%d!!\n",
bank, offset, ret);
return ret;
}
static int
mt7601u_rf_rmw(struct mt7601u_dev *dev, u8 bank, u8 offset, u8 mask, u8 val)
{
int ret;
ret = mt7601u_rf_rr(dev, bank, offset);
if (ret < 0)
return ret;
val |= ret & ~mask;
ret = mt7601u_rf_wr(dev, bank, offset, val);
if (ret)
return ret;
return val;
}
static int
mt7601u_rf_set(struct mt7601u_dev *dev, u8 bank, u8 offset, u8 val)
{
return mt7601u_rf_rmw(dev, bank, offset, 0, val);
}
static int
mt7601u_rf_clear(struct mt7601u_dev *dev, u8 bank, u8 offset, u8 mask)
{
return mt7601u_rf_rmw(dev, bank, offset, mask, 0);
}
static void mt7601u_bbp_wr(struct mt7601u_dev *dev, u8 offset, u8 val)
{
if (WARN_ON(!test_bit(MT7601U_STATE_WLAN_RUNNING, &dev->state)) ||
test_bit(MT7601U_STATE_REMOVED, &dev->state))
return;
mutex_lock(&dev->reg_atomic_mutex);
if (!mt76_poll(dev, MT_BBP_CSR_CFG, MT_BBP_CSR_CFG_BUSY, 0, 1000)) {
dev_err(dev->dev, "Error: BBP write %02hhx failed!!\n", offset);
goto out;
}
mt7601u_wr(dev, MT_BBP_CSR_CFG,
FIELD_PREP(MT_BBP_CSR_CFG_VAL, val) |
FIELD_PREP(MT_BBP_CSR_CFG_REG_NUM, offset) |
MT_BBP_CSR_CFG_RW_MODE | MT_BBP_CSR_CFG_BUSY);
trace_bbp_write(dev, offset, val);
out:
mutex_unlock(&dev->reg_atomic_mutex);
}
static int mt7601u_bbp_rr(struct mt7601u_dev *dev, u8 offset)
{
u32 val;
int ret = -ETIMEDOUT;
if (WARN_ON(!test_bit(MT7601U_STATE_WLAN_RUNNING, &dev->state)))
return -EINVAL;
if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
return 0xff;
mutex_lock(&dev->reg_atomic_mutex);
if (!mt76_poll(dev, MT_BBP_CSR_CFG, MT_BBP_CSR_CFG_BUSY, 0, 1000))
goto out;
mt7601u_wr(dev, MT_BBP_CSR_CFG,
FIELD_PREP(MT_BBP_CSR_CFG_REG_NUM, offset) |
MT_BBP_CSR_CFG_RW_MODE | MT_BBP_CSR_CFG_BUSY |
MT_BBP_CSR_CFG_READ);
if (!mt76_poll(dev, MT_BBP_CSR_CFG, MT_BBP_CSR_CFG_BUSY, 0, 1000))
goto out;
val = mt7601u_rr(dev, MT_BBP_CSR_CFG);
if (FIELD_GET(MT_BBP_CSR_CFG_REG_NUM, val) == offset) {
ret = FIELD_GET(MT_BBP_CSR_CFG_VAL, val);
trace_bbp_read(dev, offset, ret);
}
out:
mutex_unlock(&dev->reg_atomic_mutex);
if (ret < 0)
dev_err(dev->dev, "Error: BBP read %02hhx failed:%d!!\n",
offset, ret);
return ret;
}
static int mt7601u_bbp_rmw(struct mt7601u_dev *dev, u8 offset, u8 mask, u8 val)
{
int ret;
ret = mt7601u_bbp_rr(dev, offset);
if (ret < 0)
return ret;
val |= ret & ~mask;
mt7601u_bbp_wr(dev, offset, val);
return val;
}
static u8 mt7601u_bbp_rmc(struct mt7601u_dev *dev, u8 offset, u8 mask, u8 val)
{
int ret;
ret = mt7601u_bbp_rr(dev, offset);
if (ret < 0)
return ret;
val |= ret & ~mask;
if (ret != val)
mt7601u_bbp_wr(dev, offset, val);
return val;
}
int mt7601u_wait_bbp_ready(struct mt7601u_dev *dev)
{
int i = 20;
u8 val;
do {
val = mt7601u_bbp_rr(dev, MT_BBP_REG_VERSION);
if (val && val != 0xff)
break;
} while (--i);
if (!i) {
dev_err(dev->dev, "Error: BBP is not ready\n");
return -EIO;
}
return 0;
}
u32 mt7601u_bbp_set_ctrlch(struct mt7601u_dev *dev, bool below)
{
return mt7601u_bbp_rmc(dev, 3, 0x20, below ? 0x20 : 0);
}
int mt7601u_phy_get_rssi(struct mt7601u_dev *dev,
struct mt7601u_rxwi *rxwi, u16 rate)
{
static const s8 lna[2][2][3] = {
/* main LNA */ {
/* bw20 */ { -2, 15, 33 },
/* bw40 */ { 0, 16, 34 }
},
/* aux LNA */ {
/* bw20 */ { -2, 15, 33 },
/* bw40 */ { -2, 16, 34 }
}
};
int bw = FIELD_GET(MT_RXWI_RATE_BW, rate);
int aux_lna = FIELD_GET(MT_RXWI_ANT_AUX_LNA, rxwi->ant);
int lna_id = FIELD_GET(MT_RXWI_GAIN_RSSI_LNA_ID, rxwi->gain);
int val;
if (lna_id) /* LNA id can be 0, 2, 3. */
lna_id--;
val = 8;
val -= lna[aux_lna][bw][lna_id];
val -= FIELD_GET(MT_RXWI_GAIN_RSSI_VAL, rxwi->gain);
val -= dev->ee->lna_gain;
val -= dev->ee->rssi_offset[0];
return val;
}
static void mt7601u_vco_cal(struct mt7601u_dev *dev)
{
mt7601u_rf_wr(dev, 0, 4, 0x0a);
mt7601u_rf_wr(dev, 0, 5, 0x20);
mt7601u_rf_set(dev, 0, 4, BIT(7));
msleep(2);
}
static int mt7601u_set_bw_filter(struct mt7601u_dev *dev, bool cal)
{
u32 filter = 0;
int ret;
if (!cal)
filter |= 0x10000;
if (dev->bw != MT_BW_20)
filter |= 0x00100;
/* TX */
ret = mt7601u_mcu_calibrate(dev, MCU_CAL_BW, filter | 1);
if (ret)
return ret;
/* RX */
return mt7601u_mcu_calibrate(dev, MCU_CAL_BW, filter);
}
static int mt7601u_load_bbp_temp_table_bw(struct mt7601u_dev *dev)
{
const struct reg_table *t;
if (WARN_ON(dev->temp_mode > MT_TEMP_MODE_LOW))
return -EINVAL;
t = &bbp_mode_table[dev->temp_mode][dev->bw];
return mt7601u_write_reg_pairs(dev, MT_MCU_MEMMAP_BBP, t->regs, t->n);
}
static int mt7601u_bbp_temp(struct mt7601u_dev *dev, int mode, const char *name)
{
const struct reg_table *t;
int ret;
if (dev->temp_mode == mode)
return 0;
dev->temp_mode = mode;
trace_temp_mode(dev, mode);
t = bbp_mode_table[dev->temp_mode];
ret = mt7601u_write_reg_pairs(dev, MT_MCU_MEMMAP_BBP,
t[2].regs, t[2].n);
if (ret)
return ret;
return mt7601u_write_reg_pairs(dev, MT_MCU_MEMMAP_BBP,
t[dev->bw].regs, t[dev->bw].n);
}
static void mt7601u_apply_ch14_fixup(struct mt7601u_dev *dev, int hw_chan)
{
struct mt7601u_rate_power *t = &dev->ee->power_rate_table;
if (hw_chan != 14 || dev->bw != MT_BW_20) {
mt7601u_bbp_rmw(dev, 4, 0x20, 0);
mt7601u_bbp_wr(dev, 178, 0xff);
t->cck[0].bw20 = dev->ee->real_cck_bw20[0];
t->cck[1].bw20 = dev->ee->real_cck_bw20[1];
} else { /* Apply CH14 OBW fixup */
mt7601u_bbp_wr(dev, 4, 0x60);
mt7601u_bbp_wr(dev, 178, 0);
/* Note: vendor code is buggy here for negative values */
t->cck[0].bw20 = dev->ee->real_cck_bw20[0] - 2;
t->cck[1].bw20 = dev->ee->real_cck_bw20[1] - 2;
}
}
static int __mt7601u_phy_set_channel(struct mt7601u_dev *dev,
struct cfg80211_chan_def *chandef)
{
#define FREQ_PLAN_REGS 4
static const u8 freq_plan[14][FREQ_PLAN_REGS] = {
{ 0x99, 0x99, 0x09, 0x50 },
{ 0x46, 0x44, 0x0a, 0x50 },
{ 0xec, 0xee, 0x0a, 0x50 },
{ 0x99, 0x99, 0x0b, 0x50 },
{ 0x46, 0x44, 0x08, 0x51 },
{ 0xec, 0xee, 0x08, 0x51 },
{ 0x99, 0x99, 0x09, 0x51 },
{ 0x46, 0x44, 0x0a, 0x51 },
{ 0xec, 0xee, 0x0a, 0x51 },
{ 0x99, 0x99, 0x0b, 0x51 },
{ 0x46, 0x44, 0x08, 0x52 },
{ 0xec, 0xee, 0x08, 0x52 },
{ 0x99, 0x99, 0x09, 0x52 },
{ 0x33, 0x33, 0x0b, 0x52 },
};
struct mt76_reg_pair channel_freq_plan[FREQ_PLAN_REGS] = {
{ 17, 0 }, { 18, 0 }, { 19, 0 }, { 20, 0 },
};
struct mt76_reg_pair bbp_settings[3] = {
{ 62, 0x37 - dev->ee->lna_gain },
{ 63, 0x37 - dev->ee->lna_gain },
{ 64, 0x37 - dev->ee->lna_gain },
};
struct ieee80211_channel *chan = chandef->chan;
enum nl80211_channel_type chan_type =
cfg80211_get_chandef_type(chandef);
struct mt7601u_rate_power *t = &dev->ee->power_rate_table;
int chan_idx;
bool chan_ext_below;
u8 bw;
int i, ret;
bw = MT_BW_20;
chan_ext_below = (chan_type == NL80211_CHAN_HT40MINUS);
chan_idx = chan->hw_value - 1;
if (chandef->width == NL80211_CHAN_WIDTH_40) {
bw = MT_BW_40;
if (chan_idx > 1 && chan_type == NL80211_CHAN_HT40MINUS)
chan_idx -= 2;
else if (chan_idx < 12 && chan_type == NL80211_CHAN_HT40PLUS)
chan_idx += 2;
else
dev_err(dev->dev, "Error: invalid 40MHz channel!!\n");
}
if (bw != dev->bw || chan_ext_below != dev->chan_ext_below) {
dev_dbg(dev->dev, "Info: switching HT mode bw:%d below:%d\n",
bw, chan_ext_below);
mt7601u_bbp_set_bw(dev, bw);
mt7601u_bbp_set_ctrlch(dev, chan_ext_below);
mt7601u_mac_set_ctrlch(dev, chan_ext_below);
dev->chan_ext_below = chan_ext_below;
}
for (i = 0; i < FREQ_PLAN_REGS; i++)
channel_freq_plan[i].value = freq_plan[chan_idx][i];
ret = mt7601u_write_reg_pairs(dev, MT_MCU_MEMMAP_RF,
channel_freq_plan, FREQ_PLAN_REGS);
if (ret)
return ret;
mt7601u_rmw(dev, MT_TX_ALC_CFG_0, 0x3f3f,
dev->ee->chan_pwr[chan_idx] & 0x3f);
ret = mt7601u_write_reg_pairs(dev, MT_MCU_MEMMAP_BBP,
bbp_settings, ARRAY_SIZE(bbp_settings));
if (ret)
return ret;
mt7601u_vco_cal(dev);
mt7601u_bbp_set_bw(dev, bw);
ret = mt7601u_set_bw_filter(dev, false);
if (ret)
return ret;
mt7601u_apply_ch14_fixup(dev, chan->hw_value);
mt7601u_wr(dev, MT_TX_PWR_CFG_0, int_to_s6(t->ofdm[1].bw20) << 24 |
int_to_s6(t->ofdm[0].bw20) << 16 |
int_to_s6(t->cck[1].bw20) << 8 |
int_to_s6(t->cck[0].bw20));
if (test_bit(MT7601U_STATE_SCANNING, &dev->state))
mt7601u_agc_reset(dev);
dev->chandef = *chandef;
return 0;
}
int mt7601u_phy_set_channel(struct mt7601u_dev *dev,
struct cfg80211_chan_def *chandef)
{
int ret;
cancel_delayed_work_sync(&dev->cal_work);
cancel_delayed_work_sync(&dev->freq_cal.work);
mutex_lock(&dev->hw_atomic_mutex);
ret = __mt7601u_phy_set_channel(dev, chandef);
mutex_unlock(&dev->hw_atomic_mutex);
if (ret)
return ret;
if (test_bit(MT7601U_STATE_SCANNING, &dev->state))
return 0;
ieee80211_queue_delayed_work(dev->hw, &dev->cal_work,
MT_CALIBRATE_INTERVAL);
if (dev->freq_cal.enabled)
ieee80211_queue_delayed_work(dev->hw, &dev->freq_cal.work,
MT_FREQ_CAL_INIT_DELAY);
return 0;
}
#define BBP_R47_FLAG GENMASK(2, 0)
#define BBP_R47_F_TSSI 0
#define BBP_R47_F_PKT_T 1
#define BBP_R47_F_TX_RATE 2
#define BBP_R47_F_TEMP 4
/**
* mt7601u_bbp_r47_get - read value through BBP R47/R49 pair
* @dev: pointer to adapter structure
* @reg: value of BBP R47 before the operation
* @flag: one of the BBP_R47_F_* flags
*
* Convenience helper for reading values through BBP R47/R49 pair.
* Takes old value of BBP R47 as @reg, because callers usually have it
* cached already.
*
* Return: value of BBP R49.
*/
static u8 mt7601u_bbp_r47_get(struct mt7601u_dev *dev, u8 reg, u8 flag)
{
flag |= reg & ~BBP_R47_FLAG;
mt7601u_bbp_wr(dev, 47, flag);
usleep_range(500, 700);
return mt7601u_bbp_rr(dev, 49);
}
static s8 mt7601u_read_bootup_temp(struct mt7601u_dev *dev)
{
u8 bbp_val, temp;
u32 rf_bp, rf_set;
int i;
rf_set = mt7601u_rr(dev, MT_RF_SETTING_0);
rf_bp = mt7601u_rr(dev, MT_RF_BYPASS_0);
mt7601u_wr(dev, MT_RF_BYPASS_0, 0);
mt7601u_wr(dev, MT_RF_SETTING_0, 0x00000010);
mt7601u_wr(dev, MT_RF_BYPASS_0, 0x00000010);
bbp_val = mt7601u_bbp_rmw(dev, 47, 0, 0x10);
mt7601u_bbp_wr(dev, 22, 0x40);
for (i = 100; i && (bbp_val & 0x10); i--)
bbp_val = mt7601u_bbp_rr(dev, 47);
temp = mt7601u_bbp_r47_get(dev, bbp_val, BBP_R47_F_TEMP);
mt7601u_bbp_wr(dev, 22, 0);
bbp_val = mt7601u_bbp_rr(dev, 21);
bbp_val |= 0x02;
mt7601u_bbp_wr(dev, 21, bbp_val);
bbp_val &= ~0x02;
mt7601u_bbp_wr(dev, 21, bbp_val);
mt7601u_wr(dev, MT_RF_BYPASS_0, 0);
mt7601u_wr(dev, MT_RF_SETTING_0, rf_set);
mt7601u_wr(dev, MT_RF_BYPASS_0, rf_bp);
trace_read_temp(dev, temp);
return temp;
}
static s8 mt7601u_read_temp(struct mt7601u_dev *dev)
{
int i;
u8 val;
s8 temp;
val = mt7601u_bbp_rmw(dev, 47, 0x7f, 0x10);
/* Note: this rarely succeeds, temp can change even if it fails. */
for (i = 100; i && (val & 0x10); i--)
val = mt7601u_bbp_rr(dev, 47);
temp = mt7601u_bbp_r47_get(dev, val, BBP_R47_F_TEMP);
trace_read_temp(dev, temp);
return temp;
}
static void mt7601u_rxdc_cal(struct mt7601u_dev *dev)
{
static const struct mt76_reg_pair intro[] = {
{ 158, 0x8d }, { 159, 0xfc },
{ 158, 0x8c }, { 159, 0x4c },
}, outro[] = {
{ 158, 0x8d }, { 159, 0xe0 },
};
u32 mac_ctrl;
int i, ret;
mac_ctrl = mt7601u_rr(dev, MT_MAC_SYS_CTRL);
mt7601u_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_RX);
ret = mt7601u_write_reg_pairs(dev, MT_MCU_MEMMAP_BBP,
intro, ARRAY_SIZE(intro));
if (ret)
dev_err(dev->dev, "%s intro failed:%d\n", __func__, ret);
for (i = 20; i; i--) {
usleep_range(300, 500);
mt7601u_bbp_wr(dev, 158, 0x8c);
if (mt7601u_bbp_rr(dev, 159) == 0x0c)
break;
}
if (!i)
dev_err(dev->dev, "%s timed out\n", __func__);
mt7601u_wr(dev, MT_MAC_SYS_CTRL, 0);
ret = mt7601u_write_reg_pairs(dev, MT_MCU_MEMMAP_BBP,
outro, ARRAY_SIZE(outro));
if (ret)
dev_err(dev->dev, "%s outro failed:%d\n", __func__, ret);
mt7601u_wr(dev, MT_MAC_SYS_CTRL, mac_ctrl);
}
void mt7601u_phy_recalibrate_after_assoc(struct mt7601u_dev *dev)
{
if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
return;
mt7601u_mcu_calibrate(dev, MCU_CAL_DPD, dev->curr_temp);
mt7601u_rxdc_cal(dev);
}
/* Note: function copied from vendor driver */
static s16 lin2dBd(u16 linear)
{
short exp = 0;
unsigned int mantisa;
int app, dBd;
if (WARN_ON(!linear))
return -10000;
mantisa = linear;
exp = fls(mantisa) - 16;
if (exp > 0)
mantisa >>= exp;
else
mantisa <<= abs(exp);
if (mantisa <= 0xb800)
app = (mantisa + (mantisa >> 3) + (mantisa >> 4) - 0x9600);
else
app = (mantisa - (mantisa >> 3) - (mantisa >> 6) - 0x5a00);
if (app < 0)
app = 0;
dBd = ((15 + exp) << 15) + app;
dBd = (dBd << 2) + (dBd << 1) + (dBd >> 6) + (dBd >> 7);
dBd = (dBd >> 10);
return dBd;
}
static void
mt7601u_set_initial_tssi(struct mt7601u_dev *dev, s16 tssi_db, s16 tssi_hvga_db)
{
struct tssi_data *d = &dev->ee->tssi_data;
int init_offset;
init_offset = -((tssi_db * d->slope + d->offset[1]) / 4096) + 10;
mt76_rmw(dev, MT_TX_ALC_CFG_1, MT_TX_ALC_CFG_1_TEMP_COMP,
int_to_s6(init_offset) & MT_TX_ALC_CFG_1_TEMP_COMP);
}
static void mt7601u_tssi_dc_gain_cal(struct mt7601u_dev *dev)
{
u8 rf_vga, rf_mixer, bbp_r47;
int i, j;
s8 res[4];
s16 tssi_init_db, tssi_init_hvga_db;
mt7601u_wr(dev, MT_RF_SETTING_0, 0x00000030);
mt7601u_wr(dev, MT_RF_BYPASS_0, 0x000c0030);
mt7601u_wr(dev, MT_MAC_SYS_CTRL, 0);
mt7601u_bbp_wr(dev, 58, 0);
mt7601u_bbp_wr(dev, 241, 0x2);
mt7601u_bbp_wr(dev, 23, 0x8);
bbp_r47 = mt7601u_bbp_rr(dev, 47);
/* Set VGA gain */
rf_vga = mt7601u_rf_rr(dev, 5, 3);
mt7601u_rf_wr(dev, 5, 3, 8);
/* Mixer disable */
rf_mixer = mt7601u_rf_rr(dev, 4, 39);
mt7601u_rf_wr(dev, 4, 39, 0);
for (i = 0; i < 4; i++) {
mt7601u_rf_wr(dev, 4, 39, (i & 1) ? rf_mixer : 0);
mt7601u_bbp_wr(dev, 23, (i < 2) ? 0x08 : 0x02);
mt7601u_rf_wr(dev, 5, 3, (i < 2) ? 0x08 : 0x11);
/* BBP TSSI initial and soft reset */
mt7601u_bbp_wr(dev, 22, 0);
mt7601u_bbp_wr(dev, 244, 0);
mt7601u_bbp_wr(dev, 21, 1);
udelay(1);
mt7601u_bbp_wr(dev, 21, 0);
/* TSSI measurement */
mt7601u_bbp_wr(dev, 47, 0x50);
mt7601u_bbp_wr(dev, (i & 1) ? 244 : 22, (i & 1) ? 0x31 : 0x40);
for (j = 20; j; j--)
if (!(mt7601u_bbp_rr(dev, 47) & 0x10))
break;
if (!j)
dev_err(dev->dev, "%s timed out\n", __func__);
/* TSSI read */
mt7601u_bbp_wr(dev, 47, 0x40);
res[i] = mt7601u_bbp_rr(dev, 49);
}
tssi_init_db = lin2dBd((short)res[1] - res[0]);
tssi_init_hvga_db = lin2dBd(((short)res[3] - res[2]) * 4);
dev->tssi_init = res[0];
dev->tssi_init_hvga = res[2];
dev->tssi_init_hvga_offset_db = tssi_init_hvga_db - tssi_init_db;
dev_dbg(dev->dev,
"TSSI_init:%hhx db:%hx hvga:%hhx hvga_db:%hx off_db:%hx\n",
dev->tssi_init, tssi_init_db, dev->tssi_init_hvga,
tssi_init_hvga_db, dev->tssi_init_hvga_offset_db);
mt7601u_bbp_wr(dev, 22, 0);
mt7601u_bbp_wr(dev, 244, 0);
mt7601u_bbp_wr(dev, 21, 1);
udelay(1);
mt7601u_bbp_wr(dev, 21, 0);
mt7601u_wr(dev, MT_RF_BYPASS_0, 0);
mt7601u_wr(dev, MT_RF_SETTING_0, 0);
mt7601u_rf_wr(dev, 5, 3, rf_vga);
mt7601u_rf_wr(dev, 4, 39, rf_mixer);
mt7601u_bbp_wr(dev, 47, bbp_r47);
mt7601u_set_initial_tssi(dev, tssi_init_db, tssi_init_hvga_db);
}
static int mt7601u_temp_comp(struct mt7601u_dev *dev, bool on)
{
int ret, temp, hi_temp = 400, lo_temp = -200;
temp = (dev->raw_temp - dev->ee->ref_temp) * MT_EE_TEMPERATURE_SLOPE;
dev->curr_temp = temp;
/* DPD Calibration */
if (temp - dev->dpd_temp > 450 || temp - dev->dpd_temp < -450) {
dev->dpd_temp = temp;
ret = mt7601u_mcu_calibrate(dev, MCU_CAL_DPD, dev->dpd_temp);
if (ret)
return ret;
mt7601u_vco_cal(dev);
dev_dbg(dev->dev, "Recalibrate DPD\n");
}
/* PLL Lock Protect */
if (temp < -50 && !dev->pll_lock_protect) { /* < 20C */
dev->pll_lock_protect = true;
mt7601u_rf_wr(dev, 4, 4, 6);
mt7601u_rf_clear(dev, 4, 10, 0x30);
dev_dbg(dev->dev, "PLL lock protect on - too cold\n");
} else if (temp > 50 && dev->pll_lock_protect) { /* > 30C */
dev->pll_lock_protect = false;
mt7601u_rf_wr(dev, 4, 4, 0);
mt7601u_rf_rmw(dev, 4, 10, 0x30, 0x10);
dev_dbg(dev->dev, "PLL lock protect off\n");
}
if (on) {
hi_temp -= 50;
lo_temp -= 50;
}
/* BBP CR for H, L, N temperature */
if (temp > hi_temp)
return mt7601u_bbp_temp(dev, MT_TEMP_MODE_HIGH, "high");
else if (temp > lo_temp)
return mt7601u_bbp_temp(dev, MT_TEMP_MODE_NORMAL, "normal");
else
return mt7601u_bbp_temp(dev, MT_TEMP_MODE_LOW, "low");
}
/* Note: this is used only with TSSI, we can just use trgt_pwr from eeprom. */
static int mt7601u_current_tx_power(struct mt7601u_dev *dev)
{
return dev->ee->chan_pwr[dev->chandef.chan->hw_value - 1];
}
static bool mt7601u_use_hvga(struct mt7601u_dev *dev)
{
return !(mt7601u_current_tx_power(dev) > 20);
}
static s16
mt7601u_phy_rf_pa_mode_val(struct mt7601u_dev *dev, int phy_mode, int tx_rate)
{
static const s16 decode_tb[] = { 0, 8847, -5734, -5734 };
u32 reg;
switch (phy_mode) {
case MT_PHY_TYPE_OFDM:
tx_rate += 4;
fallthrough;
case MT_PHY_TYPE_CCK:
reg = dev->rf_pa_mode[0];
break;
default:
reg = dev->rf_pa_mode[1];
break;
}
return decode_tb[(reg >> (tx_rate * 2)) & 0x3];
}
static struct mt7601u_tssi_params
mt7601u_tssi_params_get(struct mt7601u_dev *dev)
{
static const u8 ofdm_pkt2rate[8] = { 6, 4, 2, 0, 7, 5, 3, 1 };
static const int static_power[4] = { 0, -49152, -98304, 49152 };
struct mt7601u_tssi_params p;
u8 bbp_r47, pkt_type, tx_rate;
struct power_per_rate *rate_table;
bbp_r47 = mt7601u_bbp_rr(dev, 47);
p.tssi0 = mt7601u_bbp_r47_get(dev, bbp_r47, BBP_R47_F_TSSI);
dev->raw_temp = mt7601u_bbp_r47_get(dev, bbp_r47, BBP_R47_F_TEMP);
pkt_type = mt7601u_bbp_r47_get(dev, bbp_r47, BBP_R47_F_PKT_T);
p.trgt_power = mt7601u_current_tx_power(dev);
switch (pkt_type & 0x03) {
case MT_PHY_TYPE_CCK:
tx_rate = (pkt_type >> 4) & 0x03;
rate_table = dev->ee->power_rate_table.cck;
break;
case MT_PHY_TYPE_OFDM:
tx_rate = ofdm_pkt2rate[(pkt_type >> 4) & 0x07];
rate_table = dev->ee->power_rate_table.ofdm;
break;
default:
tx_rate = mt7601u_bbp_r47_get(dev, bbp_r47, BBP_R47_F_TX_RATE);
tx_rate &= 0x7f;
rate_table = dev->ee->power_rate_table.ht;
break;
}
if (dev->bw == MT_BW_20)
p.trgt_power += rate_table[tx_rate / 2].bw20;
else
p.trgt_power += rate_table[tx_rate / 2].bw40;
p.trgt_power <<= 12;
dev_dbg(dev->dev, "tx_rate:%02hhx pwr:%08x\n", tx_rate, p.trgt_power);
p.trgt_power += mt7601u_phy_rf_pa_mode_val(dev, pkt_type & 0x03,
tx_rate);
/* Channel 14, cck, bw20 */
if ((pkt_type & 0x03) == MT_PHY_TYPE_CCK) {
if (mt7601u_bbp_rr(dev, 4) & 0x20)
p.trgt_power += mt7601u_bbp_rr(dev, 178) ? 18022 : 9830;
else
p.trgt_power += mt7601u_bbp_rr(dev, 178) ? 819 : 24576;
}
p.trgt_power += static_power[mt7601u_bbp_rr(dev, 1) & 0x03];
p.trgt_power += dev->ee->tssi_data.tx0_delta_offset;
dev_dbg(dev->dev,
"tssi:%02hhx t_power:%08x temp:%02hhx pkt_type:%02hhx\n",
p.tssi0, p.trgt_power, dev->raw_temp, pkt_type);
return p;
}
static bool mt7601u_tssi_read_ready(struct mt7601u_dev *dev)
{
return !(mt7601u_bbp_rr(dev, 47) & 0x10);
}
static int mt7601u_tssi_cal(struct mt7601u_dev *dev)
{
struct mt7601u_tssi_params params;
int curr_pwr, diff_pwr;
char tssi_offset;
s8 tssi_init;
s16 tssi_m_dc, tssi_db;
bool hvga;
u32 val;
if (!dev->ee->tssi_enabled)
return 0;
hvga = mt7601u_use_hvga(dev);
if (!dev->tssi_read_trig)
return mt7601u_mcu_tssi_read_kick(dev, hvga);
if (!mt7601u_tssi_read_ready(dev))
return 0;
params = mt7601u_tssi_params_get(dev);
tssi_init = (hvga ? dev->tssi_init_hvga : dev->tssi_init);
tssi_m_dc = params.tssi0 - tssi_init;
tssi_db = lin2dBd(tssi_m_dc);
dev_dbg(dev->dev, "tssi dc:%04hx db:%04hx hvga:%d\n",
tssi_m_dc, tssi_db, hvga);
if (dev->chandef.chan->hw_value < 5)
tssi_offset = dev->ee->tssi_data.offset[0];
else if (dev->chandef.chan->hw_value < 9)
tssi_offset = dev->ee->tssi_data.offset[1];
else
tssi_offset = dev->ee->tssi_data.offset[2];
if (hvga)
tssi_db -= dev->tssi_init_hvga_offset_db;
curr_pwr = tssi_db * dev->ee->tssi_data.slope + (tssi_offset << 9);
diff_pwr = params.trgt_power - curr_pwr;
dev_dbg(dev->dev, "Power curr:%08x diff:%08x\n", curr_pwr, diff_pwr);
if (params.tssi0 > 126 && diff_pwr > 0) {
dev_err(dev->dev, "Error: TSSI upper saturation\n");
diff_pwr = 0;
}
if (params.tssi0 - tssi_init < 1 && diff_pwr < 0) {
dev_err(dev->dev, "Error: TSSI lower saturation\n");
diff_pwr = 0;
}
if ((dev->prev_pwr_diff ^ diff_pwr) < 0 && abs(diff_pwr) < 4096 &&
(abs(diff_pwr) > abs(dev->prev_pwr_diff) ||
(diff_pwr > 0 && diff_pwr == -dev->prev_pwr_diff)))
diff_pwr = 0;
else
dev->prev_pwr_diff = diff_pwr;
diff_pwr += (diff_pwr > 0) ? 2048 : -2048;
diff_pwr /= 4096;
dev_dbg(dev->dev, "final diff: %08x\n", diff_pwr);
val = mt7601u_rr(dev, MT_TX_ALC_CFG_1);
curr_pwr = s6_to_int(FIELD_GET(MT_TX_ALC_CFG_1_TEMP_COMP, val));
diff_pwr += curr_pwr;
val = (val & ~MT_TX_ALC_CFG_1_TEMP_COMP) | int_to_s6(diff_pwr);
mt7601u_wr(dev, MT_TX_ALC_CFG_1, val);
return mt7601u_mcu_tssi_read_kick(dev, hvga);
}
static u8 mt7601u_agc_default(struct mt7601u_dev *dev)
{
return (dev->ee->lna_gain - 8) * 2 + 0x34;
}
static void mt7601u_agc_reset(struct mt7601u_dev *dev)
{
u8 agc = mt7601u_agc_default(dev);
mt7601u_bbp_wr(dev, 66, agc);
}
void mt7601u_agc_save(struct mt7601u_dev *dev)
{
dev->agc_save = mt7601u_bbp_rr(dev, 66);
}
void mt7601u_agc_restore(struct mt7601u_dev *dev)
{
mt7601u_bbp_wr(dev, 66, dev->agc_save);
}
static void mt7601u_agc_tune(struct mt7601u_dev *dev)
{
u8 val = mt7601u_agc_default(dev);
long avg_rssi;
if (test_bit(MT7601U_STATE_SCANNING, &dev->state))
return;
/* Note: only in STA mode and not dozing; perhaps do this only if
* there is enough rssi updates since last run?
* Rssi updates are only on beacons and U2M so should work...
*/
spin_lock_bh(&dev->con_mon_lock);
avg_rssi = ewma_rssi_read(&dev->avg_rssi);
spin_unlock_bh(&dev->con_mon_lock);
if (avg_rssi == 0)
return;
avg_rssi = -avg_rssi;
if (avg_rssi <= -70)
val -= 0x20;
else if (avg_rssi <= -60)
val -= 0x10;
if (val != mt7601u_bbp_rr(dev, 66))
mt7601u_bbp_wr(dev, 66, val);
/* TODO: also if lost a lot of beacons try resetting
* (see RTMPSetAGCInitValue() call in mlme.c).
*/
}