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