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
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
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 
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 
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
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 
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 
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 
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
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 
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