drivers/net/wireless/mediatek/mt76/mt76x02_phy.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   4  * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8
   9 #include "mt76x02.h"
  10 #include "mt76x02_phy.h"
  11
  12 void mt76x02_phy_set_rxpath(struct mt76x02_dev *dev)
  13 {
  14         u32 val;
  15
  16         val = mt76_rr(dev, MT_BBP(AGC, 0));
  17         val &= ~BIT(4);
  18
  19         switch (dev->mt76.chainmask & 0xf) {
  20         case 2:
  21                 val |= BIT(3);
  22                 break;
  23         default:
  24                 val &= ~BIT(3);
  25                 break;
  26         }
  27
  28         mt76_wr(dev, MT_BBP(AGC, 0), val);
  29         mb();
  30         val = mt76_rr(dev, MT_BBP(AGC, 0));
  31 }
  32 EXPORT_SYMBOL_GPL(mt76x02_phy_set_rxpath);
  33
  34 void mt76x02_phy_set_txdac(struct mt76x02_dev *dev)
  35 {
  36         int txpath;
  37
  38         txpath = (dev->mt76.chainmask >> 8) & 0xf;
  39         switch (txpath) {
  40         case 2:
  41                 mt76_set(dev, MT_BBP(TXBE, 5), 0x3);
  42                 break;
  43         default:
  44                 mt76_clear(dev, MT_BBP(TXBE, 5), 0x3);
  45                 break;
  46         }
  47 }
  48 EXPORT_SYMBOL_GPL(mt76x02_phy_set_txdac);
  49
  50 static u32
  51 mt76x02_tx_power_mask(u8 v1, u8 v2, u8 v3, u8 v4)
  52 {
  53         u32 val = 0;
  54
  55         val |= (v1 & (BIT(6) - 1)) << 0;
  56         val |= (v2 & (BIT(6) - 1)) << 8;
  57         val |= (v3 & (BIT(6) - 1)) << 16;
  58         val |= (v4 & (BIT(6) - 1)) << 24;
  59         return val;
  60 }
  61
  62 int mt76x02_get_max_rate_power(struct mt76_rate_power *r)
  63 {
  64         s8 ret = 0;
  65         int i;
  66
  67         for (i = 0; i < sizeof(r->all); i++)
  68                 ret = max(ret, r->all[i]);
  69
  70         return ret;
  71 }
  72 EXPORT_SYMBOL_GPL(mt76x02_get_max_rate_power);
  73
  74 void mt76x02_limit_rate_power(struct mt76_rate_power *r, int limit)
  75 {
  76         int i;
  77
  78         for (i = 0; i < sizeof(r->all); i++)
  79                 if (r->all[i] > limit)
  80                         r->all[i] = limit;
  81 }
  82 EXPORT_SYMBOL_GPL(mt76x02_limit_rate_power);
  83
  84 void mt76x02_add_rate_power_offset(struct mt76_rate_power *r, int offset)
  85 {
  86         int i;
  87
  88         for (i = 0; i < sizeof(r->all); i++)
  89                 r->all[i] += offset;
  90 }
  91 EXPORT_SYMBOL_GPL(mt76x02_add_rate_power_offset);
  92
  93 void mt76x02_phy_set_txpower(struct mt76x02_dev *dev, int txp_0, int txp_1)
  94 {
  95         struct mt76_rate_power *t = &dev->mt76.rate_power;
  96
  97         mt76_rmw_field(dev, MT_TX_ALC_CFG_0, MT_TX_ALC_CFG_0_CH_INIT_0, txp_0);
  98         mt76_rmw_field(dev, MT_TX_ALC_CFG_0, MT_TX_ALC_CFG_0_CH_INIT_1, txp_1);
  99
 100         mt76_wr(dev, MT_TX_PWR_CFG_0,
 101                 mt76x02_tx_power_mask(t->cck[0], t->cck[2], t->ofdm[0],
 102                                       t->ofdm[2]));
 103         mt76_wr(dev, MT_TX_PWR_CFG_1,
 104                 mt76x02_tx_power_mask(t->ofdm[4], t->ofdm[6], t->ht[0],
 105                                       t->ht[2]));
 106         mt76_wr(dev, MT_TX_PWR_CFG_2,
 107                 mt76x02_tx_power_mask(t->ht[4], t->ht[6], t->ht[8],
 108                                       t->ht[10]));
 109         mt76_wr(dev, MT_TX_PWR_CFG_3,
 110                 mt76x02_tx_power_mask(t->ht[12], t->ht[14], t->stbc[0],
 111                                       t->stbc[2]));
 112         mt76_wr(dev, MT_TX_PWR_CFG_4,
 113                 mt76x02_tx_power_mask(t->stbc[4], t->stbc[6], 0, 0));
 114         mt76_wr(dev, MT_TX_PWR_CFG_7,
 115                 mt76x02_tx_power_mask(t->ofdm[7], t->vht[8], t->ht[7],
 116                                       t->vht[9]));
 117         mt76_wr(dev, MT_TX_PWR_CFG_8,
 118                 mt76x02_tx_power_mask(t->ht[14], 0, t->vht[8], t->vht[9]));
 119         mt76_wr(dev, MT_TX_PWR_CFG_9,
 120                 mt76x02_tx_power_mask(t->ht[7], 0, t->stbc[8], t->stbc[9]));
 121 }
 122 EXPORT_SYMBOL_GPL(mt76x02_phy_set_txpower);
 123
 124 void mt76x02_phy_set_bw(struct mt76x02_dev *dev, int width, u8 ctrl)
 125 {
 126         int core_val, agc_val;
 127
 128         switch (width) {
 129         case NL80211_CHAN_WIDTH_80:
 130                 core_val = 3;
 131                 agc_val = 7;
 132                 break;
 133         case NL80211_CHAN_WIDTH_40:
 134                 core_val = 2;
 135                 agc_val = 3;
 136                 break;
 137         default:
 138                 core_val = 0;
 139                 agc_val = 1;
 140                 break;
 141         }
 142
 143         mt76_rmw_field(dev, MT_BBP(CORE, 1), MT_BBP_CORE_R1_BW, core_val);
 144         mt76_rmw_field(dev, MT_BBP(AGC, 0), MT_BBP_AGC_R0_BW, agc_val);
 145         mt76_rmw_field(dev, MT_BBP(AGC, 0), MT_BBP_AGC_R0_CTRL_CHAN, ctrl);
 146         mt76_rmw_field(dev, MT_BBP(TXBE, 0), MT_BBP_TXBE_R0_CTRL_CHAN, ctrl);
 147 }
 148 EXPORT_SYMBOL_GPL(mt76x02_phy_set_bw);
 149
 150 void mt76x02_phy_set_band(struct mt76x02_dev *dev, int band,
 151                           bool primary_upper)
 152 {
 153         switch (band) {
 154         case NL80211_BAND_2GHZ:
 155                 mt76_set(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_2G);
 156                 mt76_clear(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_5G);
 157                 break;
 158         case NL80211_BAND_5GHZ:
 159                 mt76_clear(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_2G);
 160                 mt76_set(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_5G);
 161                 break;
 162         }
 163
 164         mt76_rmw_field(dev, MT_TX_BAND_CFG, MT_TX_BAND_CFG_UPPER_40M,
 165                        primary_upper);
 166 }
 167 EXPORT_SYMBOL_GPL(mt76x02_phy_set_band);
 168
 169 bool mt76x02_phy_adjust_vga_gain(struct mt76x02_dev *dev)
 170 {
 171         u8 limit = dev->cal.low_gain > 0 ? 16 : 4;
 172         bool ret = false;
 173         u32 false_cca;
 174
 175         false_cca = FIELD_GET(MT_RX_STAT_1_CCA_ERRORS,
 176                               mt76_rr(dev, MT_RX_STAT_1));
 177         dev->cal.false_cca = false_cca;
 178         if (false_cca > 800 && dev->cal.agc_gain_adjust < limit) {
 179                 dev->cal.agc_gain_adjust += 2;
 180                 ret = true;
 181         } else if ((false_cca < 10 && dev->cal.agc_gain_adjust > 0) ||
 182                    (dev->cal.agc_gain_adjust >= limit && false_cca < 500)) {
 183                 dev->cal.agc_gain_adjust -= 2;
 184                 ret = true;
 185         }
 186
 187         dev->cal.agc_lowest_gain = dev->cal.agc_gain_adjust >= limit;
 188
 189         return ret;
 190 }
 191 EXPORT_SYMBOL_GPL(mt76x02_phy_adjust_vga_gain);
 192
 193 void mt76x02_init_agc_gain(struct mt76x02_dev *dev)
 194 {
 195         dev->cal.agc_gain_init[0] = mt76_get_field(dev, MT_BBP(AGC, 8),
 196                                                    MT_BBP_AGC_GAIN);
 197         dev->cal.agc_gain_init[1] = mt76_get_field(dev, MT_BBP(AGC, 9),
 198                                                    MT_BBP_AGC_GAIN);
 199         memcpy(dev->cal.agc_gain_cur, dev->cal.agc_gain_init,
 200                sizeof(dev->cal.agc_gain_cur));
 201         dev->cal.low_gain = -1;
 202         dev->cal.gain_init_done = true;
 203 }
 204 EXPORT_SYMBOL_GPL(mt76x02_init_agc_gain);