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 "mt76x2.h"
8 #include "eeprom.h"
9 #include "mcu.h"
10 #include "../mt76x02_phy.h"
11
12 static void
mt76x2_adjust_high_lna_gain(struct mt76x02_dev * dev,int reg,s8 offset)13 mt76x2_adjust_high_lna_gain(struct mt76x02_dev *dev, int reg, s8 offset)
14 {
15 s8 gain;
16
17 gain = FIELD_GET(MT_BBP_AGC_LNA_HIGH_GAIN,
18 mt76_rr(dev, MT_BBP(AGC, reg)));
19 gain -= offset / 2;
20 mt76_rmw_field(dev, MT_BBP(AGC, reg), MT_BBP_AGC_LNA_HIGH_GAIN, gain);
21 }
22
23 static void
mt76x2_adjust_agc_gain(struct mt76x02_dev * dev,int reg,s8 offset)24 mt76x2_adjust_agc_gain(struct mt76x02_dev *dev, int reg, s8 offset)
25 {
26 s8 gain;
27
28 gain = FIELD_GET(MT_BBP_AGC_GAIN, mt76_rr(dev, MT_BBP(AGC, reg)));
29 gain += offset;
30 mt76_rmw_field(dev, MT_BBP(AGC, reg), MT_BBP_AGC_GAIN, gain);
31 }
32
mt76x2_apply_gain_adj(struct mt76x02_dev * dev)33 void mt76x2_apply_gain_adj(struct mt76x02_dev *dev)
34 {
35 s8 *gain_adj = dev->cal.rx.high_gain;
36
37 mt76x2_adjust_high_lna_gain(dev, 4, gain_adj[0]);
38 mt76x2_adjust_high_lna_gain(dev, 5, gain_adj[1]);
39
40 mt76x2_adjust_agc_gain(dev, 8, gain_adj[0]);
41 mt76x2_adjust_agc_gain(dev, 9, gain_adj[1]);
42 }
43 EXPORT_SYMBOL_GPL(mt76x2_apply_gain_adj);
44
mt76x2_phy_set_txpower_regs(struct mt76x02_dev * dev,enum nl80211_band band)45 void mt76x2_phy_set_txpower_regs(struct mt76x02_dev *dev,
46 enum nl80211_band band)
47 {
48 u32 pa_mode[2];
49 u32 pa_mode_adj;
50
51 if (band == NL80211_BAND_2GHZ) {
52 pa_mode[0] = 0x010055ff;
53 pa_mode[1] = 0x00550055;
54
55 mt76_wr(dev, MT_TX_ALC_CFG_2, 0x35160a00);
56 mt76_wr(dev, MT_TX_ALC_CFG_3, 0x35160a06);
57
58 if (mt76x02_ext_pa_enabled(dev, band)) {
59 mt76_wr(dev, MT_RF_PA_MODE_ADJ0, 0x0000ec00);
60 mt76_wr(dev, MT_RF_PA_MODE_ADJ1, 0x0000ec00);
61 } else {
62 mt76_wr(dev, MT_RF_PA_MODE_ADJ0, 0xf4000200);
63 mt76_wr(dev, MT_RF_PA_MODE_ADJ1, 0xfa000200);
64 }
65 } else {
66 pa_mode[0] = 0x0000ffff;
67 pa_mode[1] = 0x00ff00ff;
68
69 if (mt76x02_ext_pa_enabled(dev, band)) {
70 mt76_wr(dev, MT_TX_ALC_CFG_2, 0x2f0f0400);
71 mt76_wr(dev, MT_TX_ALC_CFG_3, 0x2f0f0476);
72 } else {
73 mt76_wr(dev, MT_TX_ALC_CFG_2, 0x1b0f0400);
74 mt76_wr(dev, MT_TX_ALC_CFG_3, 0x1b0f0476);
75 }
76
77 if (mt76x02_ext_pa_enabled(dev, band))
78 pa_mode_adj = 0x04000000;
79 else
80 pa_mode_adj = 0;
81
82 mt76_wr(dev, MT_RF_PA_MODE_ADJ0, pa_mode_adj);
83 mt76_wr(dev, MT_RF_PA_MODE_ADJ1, pa_mode_adj);
84 }
85
86 mt76_wr(dev, MT_BB_PA_MODE_CFG0, pa_mode[0]);
87 mt76_wr(dev, MT_BB_PA_MODE_CFG1, pa_mode[1]);
88 mt76_wr(dev, MT_RF_PA_MODE_CFG0, pa_mode[0]);
89 mt76_wr(dev, MT_RF_PA_MODE_CFG1, pa_mode[1]);
90
91 if (mt76x02_ext_pa_enabled(dev, band)) {
92 u32 val;
93
94 if (band == NL80211_BAND_2GHZ)
95 val = 0x3c3c023c;
96 else
97 val = 0x363c023c;
98
99 mt76_wr(dev, MT_TX0_RF_GAIN_CORR, val);
100 mt76_wr(dev, MT_TX1_RF_GAIN_CORR, val);
101 mt76_wr(dev, MT_TX_ALC_CFG_4, 0x00001818);
102 } else {
103 if (band == NL80211_BAND_2GHZ) {
104 u32 val = 0x0f3c3c3c;
105
106 mt76_wr(dev, MT_TX0_RF_GAIN_CORR, val);
107 mt76_wr(dev, MT_TX1_RF_GAIN_CORR, val);
108 mt76_wr(dev, MT_TX_ALC_CFG_4, 0x00000606);
109 } else {
110 mt76_wr(dev, MT_TX0_RF_GAIN_CORR, 0x383c023c);
111 mt76_wr(dev, MT_TX1_RF_GAIN_CORR, 0x24282e28);
112 mt76_wr(dev, MT_TX_ALC_CFG_4, 0);
113 }
114 }
115 }
116 EXPORT_SYMBOL_GPL(mt76x2_phy_set_txpower_regs);
117
118 static int
mt76x2_get_min_rate_power(struct mt76x02_rate_power * r)119 mt76x2_get_min_rate_power(struct mt76x02_rate_power *r)
120 {
121 int i;
122 s8 ret = 0;
123
124 for (i = 0; i < sizeof(r->all); i++) {
125 if (!r->all[i])
126 continue;
127
128 if (ret)
129 ret = min(ret, r->all[i]);
130 else
131 ret = r->all[i];
132 }
133
134 return ret;
135 }
136
mt76x2_phy_set_txpower(struct mt76x02_dev * dev)137 void mt76x2_phy_set_txpower(struct mt76x02_dev *dev)
138 {
139 enum nl80211_chan_width width = dev->mphy.chandef.width;
140 struct ieee80211_channel *chan = dev->mphy.chandef.chan;
141 struct mt76x2_tx_power_info txp;
142 int txp_0, txp_1, delta = 0;
143 struct mt76x02_rate_power t = {};
144 int base_power, gain;
145
146 mt76x2_get_power_info(dev, &txp, chan);
147
148 if (width == NL80211_CHAN_WIDTH_40)
149 delta = txp.delta_bw40;
150 else if (width == NL80211_CHAN_WIDTH_80)
151 delta = txp.delta_bw80;
152
153 mt76x2_get_rate_power(dev, &t, chan);
154 mt76x02_add_rate_power_offset(&t, txp.target_power + delta);
155 mt76x02_limit_rate_power(&t, dev->txpower_conf);
156 dev->mphy.txpower_cur = mt76x02_get_max_rate_power(&t);
157
158 base_power = mt76x2_get_min_rate_power(&t);
159 delta = base_power - txp.target_power;
160 txp_0 = txp.chain[0].target_power + txp.chain[0].delta + delta;
161 txp_1 = txp.chain[1].target_power + txp.chain[1].delta + delta;
162
163 gain = min(txp_0, txp_1);
164 if (gain < 0) {
165 base_power -= gain;
166 txp_0 -= gain;
167 txp_1 -= gain;
168 } else if (gain > 0x2f) {
169 base_power -= gain - 0x2f;
170 txp_0 = 0x2f;
171 txp_1 = 0x2f;
172 }
173
174 mt76x02_add_rate_power_offset(&t, -base_power);
175 dev->target_power = txp.target_power;
176 dev->target_power_delta[0] = txp_0 - txp.chain[0].target_power;
177 dev->target_power_delta[1] = txp_1 - txp.chain[0].target_power;
178 dev->rate_power = t;
179
180 mt76x02_phy_set_txpower(dev, txp_0, txp_1);
181 }
182 EXPORT_SYMBOL_GPL(mt76x2_phy_set_txpower);
183
mt76x2_configure_tx_delay(struct mt76x02_dev * dev,enum nl80211_band band,u8 bw)184 void mt76x2_configure_tx_delay(struct mt76x02_dev *dev,
185 enum nl80211_band band, u8 bw)
186 {
187 u32 cfg0, cfg1;
188
189 if (mt76x02_ext_pa_enabled(dev, band)) {
190 cfg0 = bw ? 0x000b0c01 : 0x00101101;
191 cfg1 = 0x00011414;
192 } else {
193 cfg0 = bw ? 0x000b0b01 : 0x00101001;
194 cfg1 = 0x00021414;
195 }
196 mt76_wr(dev, MT_TX_SW_CFG0, cfg0);
197 mt76_wr(dev, MT_TX_SW_CFG1, cfg1);
198
199 mt76_rmw_field(dev, MT_XIFS_TIME_CFG, MT_XIFS_TIME_CFG_OFDM_SIFS, 15);
200 }
201 EXPORT_SYMBOL_GPL(mt76x2_configure_tx_delay);
202
mt76x2_phy_tssi_compensate(struct mt76x02_dev * dev)203 void mt76x2_phy_tssi_compensate(struct mt76x02_dev *dev)
204 {
205 struct ieee80211_channel *chan = dev->mphy.chandef.chan;
206 struct mt76x2_tx_power_info txp;
207 struct mt76x2_tssi_comp t = {};
208
209 if (!dev->cal.tssi_cal_done)
210 return;
211
212 if (!dev->cal.tssi_comp_pending) {
213 /* TSSI trigger */
214 t.cal_mode = BIT(0);
215 mt76x2_mcu_tssi_comp(dev, &t);
216 dev->cal.tssi_comp_pending = true;
217 } else {
218 if (mt76_rr(dev, MT_BBP(CORE, 34)) & BIT(4))
219 return;
220
221 dev->cal.tssi_comp_pending = false;
222 mt76x2_get_power_info(dev, &txp, chan);
223
224 if (mt76x02_ext_pa_enabled(dev, chan->band))
225 t.pa_mode = 1;
226
227 t.cal_mode = BIT(1);
228 t.slope0 = txp.chain[0].tssi_slope;
229 t.offset0 = txp.chain[0].tssi_offset;
230 t.slope1 = txp.chain[1].tssi_slope;
231 t.offset1 = txp.chain[1].tssi_offset;
232 mt76x2_mcu_tssi_comp(dev, &t);
233
234 if (t.pa_mode || dev->cal.dpd_cal_done || dev->ed_tx_blocked)
235 return;
236
237 usleep_range(10000, 20000);
238 mt76x02_mcu_calibrate(dev, MCU_CAL_DPD, chan->hw_value);
239 dev->cal.dpd_cal_done = true;
240 }
241 }
242 EXPORT_SYMBOL_GPL(mt76x2_phy_tssi_compensate);
243
244 static void
mt76x2_phy_set_gain_val(struct mt76x02_dev * dev)245 mt76x2_phy_set_gain_val(struct mt76x02_dev *dev)
246 {
247 u32 val;
248 u8 gain_val[2];
249
250 gain_val[0] = dev->cal.agc_gain_cur[0] - dev->cal.agc_gain_adjust;
251 gain_val[1] = dev->cal.agc_gain_cur[1] - dev->cal.agc_gain_adjust;
252
253 val = 0x1836 << 16;
254 if (!mt76x2_has_ext_lna(dev) &&
255 dev->mphy.chandef.width >= NL80211_CHAN_WIDTH_40)
256 val = 0x1e42 << 16;
257
258 if (mt76x2_has_ext_lna(dev) &&
259 dev->mphy.chandef.chan->band == NL80211_BAND_2GHZ &&
260 dev->mphy.chandef.width < NL80211_CHAN_WIDTH_40)
261 val = 0x0f36 << 16;
262
263 val |= 0xf8;
264
265 mt76_wr(dev, MT_BBP(AGC, 8),
266 val | FIELD_PREP(MT_BBP_AGC_GAIN, gain_val[0]));
267 mt76_wr(dev, MT_BBP(AGC, 9),
268 val | FIELD_PREP(MT_BBP_AGC_GAIN, gain_val[1]));
269
270 if (dev->mphy.chandef.chan->flags & IEEE80211_CHAN_RADAR)
271 mt76x02_phy_dfs_adjust_agc(dev);
272 }
273
mt76x2_phy_update_channel_gain(struct mt76x02_dev * dev)274 void mt76x2_phy_update_channel_gain(struct mt76x02_dev *dev)
275 {
276 u8 *gain = dev->cal.agc_gain_init;
277 u8 low_gain_delta, gain_delta;
278 u32 agc_35, agc_37;
279 bool gain_change;
280 int low_gain;
281 u32 val;
282
283 dev->cal.avg_rssi_all = mt76_get_min_avg_rssi(&dev->mt76, false);
284 if (!dev->cal.avg_rssi_all)
285 dev->cal.avg_rssi_all = -75;
286
287 low_gain = (dev->cal.avg_rssi_all > mt76x02_get_rssi_gain_thresh(dev)) +
288 (dev->cal.avg_rssi_all > mt76x02_get_low_rssi_gain_thresh(dev));
289
290 gain_change = dev->cal.low_gain < 0 ||
291 (dev->cal.low_gain & 2) ^ (low_gain & 2);
292 dev->cal.low_gain = low_gain;
293
294 if (!gain_change) {
295 if (mt76x02_phy_adjust_vga_gain(dev))
296 mt76x2_phy_set_gain_val(dev);
297 return;
298 }
299
300 if (dev->mphy.chandef.width == NL80211_CHAN_WIDTH_80) {
301 mt76_wr(dev, MT_BBP(RXO, 14), 0x00560211);
302 val = mt76_rr(dev, MT_BBP(AGC, 26)) & ~0xf;
303 if (low_gain == 2)
304 val |= 0x3;
305 else
306 val |= 0x5;
307 mt76_wr(dev, MT_BBP(AGC, 26), val);
308 } else {
309 mt76_wr(dev, MT_BBP(RXO, 14), 0x00560423);
310 }
311
312 if (mt76x2_has_ext_lna(dev))
313 low_gain_delta = 10;
314 else
315 low_gain_delta = 14;
316
317 agc_37 = 0x2121262c;
318 if (dev->mphy.chandef.chan->band == NL80211_BAND_2GHZ)
319 agc_35 = 0x11111516;
320 else if (low_gain == 2)
321 agc_35 = agc_37 = 0x08080808;
322 else if (dev->mphy.chandef.width == NL80211_CHAN_WIDTH_80)
323 agc_35 = 0x10101014;
324 else
325 agc_35 = 0x11111116;
326
327 if (low_gain == 2) {
328 mt76_wr(dev, MT_BBP(RXO, 18), 0xf000a990);
329 mt76_wr(dev, MT_BBP(AGC, 35), 0x08080808);
330 mt76_wr(dev, MT_BBP(AGC, 37), 0x08080808);
331 gain_delta = low_gain_delta;
332 dev->cal.agc_gain_adjust = 0;
333 } else {
334 mt76_wr(dev, MT_BBP(RXO, 18), 0xf000a991);
335 gain_delta = 0;
336 dev->cal.agc_gain_adjust = low_gain_delta;
337 }
338
339 mt76_wr(dev, MT_BBP(AGC, 35), agc_35);
340 mt76_wr(dev, MT_BBP(AGC, 37), agc_37);
341
342 dev->cal.agc_gain_cur[0] = gain[0] - gain_delta;
343 dev->cal.agc_gain_cur[1] = gain[1] - gain_delta;
344 mt76x2_phy_set_gain_val(dev);
345
346 /* clear false CCA counters */
347 mt76_rr(dev, MT_RX_STAT_1);
348 }
349 EXPORT_SYMBOL_GPL(mt76x2_phy_update_channel_gain);
350