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->mphy.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->mphy.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 mt76x02_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 mt76x02_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 mt76x02_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 mt76x02_rate_power *t = &dev->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->ht[0],
111 				      t->ht[2]));
112 	mt76_wr(dev, MT_TX_PWR_CFG_4,
113 		mt76x02_tx_power_mask(t->ht[4], t->ht[6], 0, 0));
114 	mt76_wr(dev, MT_TX_PWR_CFG_7,
115 		mt76x02_tx_power_mask(t->ofdm[7], t->vht[0], t->ht[7],
116 				      t->vht[1]));
117 	mt76_wr(dev, MT_TX_PWR_CFG_8,
118 		mt76x02_tx_power_mask(t->ht[14], 0, t->vht[0], t->vht[1]));
119 	mt76_wr(dev, MT_TX_PWR_CFG_9,
120 		mt76x02_tx_power_mask(t->ht[7], 0, t->vht[0], t->vht[1]));
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);
205