1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2020 MediaTek Inc. */
3 
4 #include <linux/firmware.h>
5 #include "mt7915.h"
6 #include "eeprom.h"
7 
8 static int mt7915_eeprom_load_precal(struct mt7915_dev *dev)
9 {
10 	struct mt76_dev *mdev = &dev->mt76;
11 	u8 *eeprom = mdev->eeprom.data;
12 	u32 val = eeprom[MT_EE_DO_PRE_CAL];
13 	u32 offs;
14 
15 	if (!dev->flash_mode)
16 		return 0;
17 
18 	if (val != (MT_EE_WIFI_CAL_DPD | MT_EE_WIFI_CAL_GROUP))
19 		return 0;
20 
21 	val = MT_EE_CAL_GROUP_SIZE + MT_EE_CAL_DPD_SIZE;
22 	dev->cal = devm_kzalloc(mdev->dev, val, GFP_KERNEL);
23 	if (!dev->cal)
24 		return -ENOMEM;
25 
26 	offs = is_mt7915(&dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
27 
28 	return mt76_get_of_eeprom(mdev, dev->cal, offs, val);
29 }
30 
31 static int mt7915_check_eeprom(struct mt7915_dev *dev)
32 {
33 	u8 *eeprom = dev->mt76.eeprom.data;
34 	u16 val = get_unaligned_le16(eeprom);
35 
36 #define CHECK_EEPROM_ERR(match)	(match ? 0 : -EINVAL)
37 	switch (val) {
38 	case 0x7915:
39 		return CHECK_EEPROM_ERR(is_mt7915(&dev->mt76));
40 	case 0x7916:
41 		return CHECK_EEPROM_ERR(is_mt7916(&dev->mt76));
42 	case 0x7981:
43 		return CHECK_EEPROM_ERR(is_mt7981(&dev->mt76));
44 	case 0x7986:
45 		return CHECK_EEPROM_ERR(is_mt7986(&dev->mt76));
46 	default:
47 		return -EINVAL;
48 	}
49 }
50 
51 static char *mt7915_eeprom_name(struct mt7915_dev *dev)
52 {
53 	switch (mt76_chip(&dev->mt76)) {
54 	case 0x7915:
55 		return dev->dbdc_support ?
56 		       MT7915_EEPROM_DEFAULT_DBDC : MT7915_EEPROM_DEFAULT;
57 	case 0x7981:
58 		/* mt7981 only supports mt7976 and only in DBDC mode */
59 		return MT7981_EEPROM_MT7976_DEFAULT_DBDC;
60 	case 0x7986:
61 		switch (mt7915_check_adie(dev, true)) {
62 		case MT7976_ONE_ADIE_DBDC:
63 			return MT7986_EEPROM_MT7976_DEFAULT_DBDC;
64 		case MT7975_ONE_ADIE:
65 			return MT7986_EEPROM_MT7975_DEFAULT;
66 		case MT7976_ONE_ADIE:
67 			return MT7986_EEPROM_MT7976_DEFAULT;
68 		case MT7975_DUAL_ADIE:
69 			return MT7986_EEPROM_MT7975_DUAL_DEFAULT;
70 		case MT7976_DUAL_ADIE:
71 			return MT7986_EEPROM_MT7976_DUAL_DEFAULT;
72 		default:
73 			break;
74 		}
75 		return NULL;
76 	default:
77 		return MT7916_EEPROM_DEFAULT;
78 	}
79 }
80 
81 static int
82 mt7915_eeprom_load_default(struct mt7915_dev *dev)
83 {
84 	u8 *eeprom = dev->mt76.eeprom.data;
85 	const struct firmware *fw = NULL;
86 	int ret;
87 
88 	ret = request_firmware(&fw, mt7915_eeprom_name(dev), dev->mt76.dev);
89 	if (ret)
90 		return ret;
91 
92 	if (!fw || !fw->data) {
93 		dev_err(dev->mt76.dev, "Invalid default bin\n");
94 		ret = -EINVAL;
95 		goto out;
96 	}
97 
98 	memcpy(eeprom, fw->data, mt7915_eeprom_size(dev));
99 	dev->flash_mode = true;
100 
101 out:
102 	release_firmware(fw);
103 
104 	return ret;
105 }
106 
107 static int mt7915_eeprom_load(struct mt7915_dev *dev)
108 {
109 	int ret;
110 	u16 eeprom_size = mt7915_eeprom_size(dev);
111 
112 	ret = mt76_eeprom_init(&dev->mt76, eeprom_size);
113 	if (ret < 0)
114 		return ret;
115 
116 	if (ret) {
117 		dev->flash_mode = true;
118 	} else {
119 		u8 free_block_num;
120 		u32 block_num, i;
121 		u32 eeprom_blk_size = MT7915_EEPROM_BLOCK_SIZE;
122 
123 		ret = mt7915_mcu_get_eeprom_free_block(dev, &free_block_num);
124 		if (ret < 0)
125 			return ret;
126 
127 		/* efuse info isn't enough */
128 		if (free_block_num >= 29)
129 			return -EINVAL;
130 
131 		/* read eeprom data from efuse */
132 		block_num = DIV_ROUND_UP(eeprom_size, eeprom_blk_size);
133 		for (i = 0; i < block_num; i++) {
134 			ret = mt7915_mcu_get_eeprom(dev, i * eeprom_blk_size);
135 			if (ret < 0)
136 				return ret;
137 		}
138 	}
139 
140 	return mt7915_check_eeprom(dev);
141 }
142 
143 static void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy)
144 {
145 	struct mt7915_dev *dev = phy->dev;
146 	u8 *eeprom = dev->mt76.eeprom.data;
147 	u8 band = phy->mt76->band_idx;
148 	u32 val;
149 
150 	val = eeprom[MT_EE_WIFI_CONF + band];
151 	val = FIELD_GET(MT_EE_WIFI_CONF0_BAND_SEL, val);
152 
153 	if (!is_mt7915(&dev->mt76)) {
154 		switch (val) {
155 		case MT_EE_V2_BAND_SEL_5GHZ:
156 			phy->mt76->cap.has_5ghz = true;
157 			return;
158 		case MT_EE_V2_BAND_SEL_6GHZ:
159 			phy->mt76->cap.has_6ghz = true;
160 			return;
161 		case MT_EE_V2_BAND_SEL_5GHZ_6GHZ:
162 			phy->mt76->cap.has_5ghz = true;
163 			phy->mt76->cap.has_6ghz = true;
164 			return;
165 		default:
166 			phy->mt76->cap.has_2ghz = true;
167 			return;
168 		}
169 	} else if (val == MT_EE_BAND_SEL_DEFAULT && dev->dbdc_support) {
170 		val = band ? MT_EE_BAND_SEL_5GHZ : MT_EE_BAND_SEL_2GHZ;
171 	}
172 
173 	switch (val) {
174 	case MT_EE_BAND_SEL_5GHZ:
175 		phy->mt76->cap.has_5ghz = true;
176 		break;
177 	case MT_EE_BAND_SEL_2GHZ:
178 		phy->mt76->cap.has_2ghz = true;
179 		break;
180 	default:
181 		phy->mt76->cap.has_2ghz = true;
182 		phy->mt76->cap.has_5ghz = true;
183 		break;
184 	}
185 }
186 
187 void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
188 				struct mt7915_phy *phy)
189 {
190 	u8 path, nss, nss_max = 4, *eeprom = dev->mt76.eeprom.data;
191 	struct mt76_phy *mphy = phy->mt76;
192 	u8 band = phy->mt76->band_idx;
193 
194 	mt7915_eeprom_parse_band_config(phy);
195 
196 	/* read tx/rx path from eeprom */
197 	if (is_mt7915(&dev->mt76)) {
198 		path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
199 				 eeprom[MT_EE_WIFI_CONF]);
200 	} else {
201 		path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
202 				 eeprom[MT_EE_WIFI_CONF + band]);
203 	}
204 
205 	if (!path || path > 4)
206 		path = 4;
207 
208 	/* read tx/rx stream */
209 	nss = path;
210 	if (dev->dbdc_support) {
211 		if (is_mt7915(&dev->mt76)) {
212 			path = min_t(u8, path, 2);
213 			nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B0,
214 					eeprom[MT_EE_WIFI_CONF + 3]);
215 			if (band)
216 				nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B1,
217 						eeprom[MT_EE_WIFI_CONF + 3]);
218 		} else {
219 			nss = FIELD_GET(MT_EE_WIFI_CONF_STREAM_NUM,
220 					eeprom[MT_EE_WIFI_CONF + 2 + band]);
221 		}
222 
223 		if (!is_mt798x(&dev->mt76))
224 			nss_max = 2;
225 	}
226 
227 	if (!nss)
228 		nss = nss_max;
229 	nss = min_t(u8, min_t(u8, nss_max, nss), path);
230 
231 	mphy->chainmask = BIT(path) - 1;
232 	if (band)
233 		mphy->chainmask <<= dev->chainshift;
234 	mphy->antenna_mask = BIT(nss) - 1;
235 	dev->chainmask |= mphy->chainmask;
236 	dev->chainshift = hweight8(dev->mphy.chainmask);
237 }
238 
239 int mt7915_eeprom_init(struct mt7915_dev *dev)
240 {
241 	int ret;
242 
243 	ret = mt7915_eeprom_load(dev);
244 	if (ret < 0) {
245 		if (ret != -EINVAL)
246 			return ret;
247 
248 		dev_warn(dev->mt76.dev, "eeprom load fail, use default bin\n");
249 		ret = mt7915_eeprom_load_default(dev);
250 		if (ret)
251 			return ret;
252 	}
253 
254 	ret = mt7915_eeprom_load_precal(dev);
255 	if (ret)
256 		return ret;
257 
258 	mt7915_eeprom_parse_hw_cap(dev, &dev->phy);
259 	memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
260 	       ETH_ALEN);
261 
262 	mt76_eeprom_override(&dev->mphy);
263 
264 	return 0;
265 }
266 
267 int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
268 				   struct ieee80211_channel *chan,
269 				   u8 chain_idx)
270 {
271 	u8 *eeprom = dev->mt76.eeprom.data;
272 	int index, target_power;
273 	bool tssi_on, is_7976;
274 
275 	if (chain_idx > 3)
276 		return -EINVAL;
277 
278 	tssi_on = mt7915_tssi_enabled(dev, chan->band);
279 	is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
280 
281 	if (chan->band == NL80211_BAND_2GHZ) {
282 		if (is_7976) {
283 			index = MT_EE_TX0_POWER_2G_V2 + chain_idx;
284 			target_power = eeprom[index];
285 		} else {
286 			index = MT_EE_TX0_POWER_2G + chain_idx * 3;
287 			target_power = eeprom[index];
288 
289 			if (!tssi_on)
290 				target_power += eeprom[index + 1];
291 		}
292 	} else if (chan->band == NL80211_BAND_5GHZ) {
293 		int group = mt7915_get_channel_group_5g(chan->hw_value, is_7976);
294 
295 		if (is_7976) {
296 			index = MT_EE_TX0_POWER_5G_V2 + chain_idx * 5;
297 			target_power = eeprom[index + group];
298 		} else {
299 			index = MT_EE_TX0_POWER_5G + chain_idx * 12;
300 			target_power = eeprom[index + group];
301 
302 			if (!tssi_on)
303 				target_power += eeprom[index + 8];
304 		}
305 	} else {
306 		int group = mt7915_get_channel_group_6g(chan->hw_value);
307 
308 		index = MT_EE_TX0_POWER_6G_V2 + chain_idx * 8;
309 		target_power = is_7976 ? eeprom[index + group] : 0;
310 	}
311 
312 	return target_power;
313 }
314 
315 s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
316 {
317 	u8 *eeprom = dev->mt76.eeprom.data;
318 	u32 val, offs;
319 	s8 delta;
320 	bool is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
321 
322 	if (band == NL80211_BAND_2GHZ)
323 		offs = is_7976 ? MT_EE_RATE_DELTA_2G_V2 : MT_EE_RATE_DELTA_2G;
324 	else if (band == NL80211_BAND_5GHZ)
325 		offs = is_7976 ? MT_EE_RATE_DELTA_5G_V2 : MT_EE_RATE_DELTA_5G;
326 	else
327 		offs = is_7976 ? MT_EE_RATE_DELTA_6G_V2 : 0;
328 
329 	val = eeprom[offs];
330 
331 	if (!offs || !(val & MT_EE_RATE_DELTA_EN))
332 		return 0;
333 
334 	delta = FIELD_GET(MT_EE_RATE_DELTA_MASK, val);
335 
336 	return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
337 }
338 
339 const u8 mt7915_sku_group_len[] = {
340 	[SKU_CCK] = 4,
341 	[SKU_OFDM] = 8,
342 	[SKU_HT_BW20] = 8,
343 	[SKU_HT_BW40] = 9,
344 	[SKU_VHT_BW20] = 12,
345 	[SKU_VHT_BW40] = 12,
346 	[SKU_VHT_BW80] = 12,
347 	[SKU_VHT_BW160] = 12,
348 	[SKU_HE_RU26] = 12,
349 	[SKU_HE_RU52] = 12,
350 	[SKU_HE_RU106] = 12,
351 	[SKU_HE_RU242] = 12,
352 	[SKU_HE_RU484] = 12,
353 	[SKU_HE_RU996] = 12,
354 	[SKU_HE_RU2x996] = 12
355 };
356