1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2020 MediaTek Inc. */
3
4 #include <linux/firmware.h>
5 #include <linux/moduleparam.h>
6 #include "mt7915.h"
7 #include "eeprom.h"
8
9 static bool enable_6ghz;
10 module_param(enable_6ghz, bool, 0644);
11 MODULE_PARM_DESC(enable_6ghz, "Enable 6 GHz instead of 5 GHz on hardware that supports both");
12
mt7915_eeprom_load_precal(struct mt7915_dev * dev)13 static int mt7915_eeprom_load_precal(struct mt7915_dev *dev)
14 {
15 struct mt76_dev *mdev = &dev->mt76;
16 u8 *eeprom = mdev->eeprom.data;
17 u32 val = eeprom[MT_EE_DO_PRE_CAL];
18 u32 offs;
19
20 if (!dev->flash_mode)
21 return 0;
22
23 if (val != (MT_EE_WIFI_CAL_DPD | MT_EE_WIFI_CAL_GROUP))
24 return 0;
25
26 val = MT_EE_CAL_GROUP_SIZE + MT_EE_CAL_DPD_SIZE;
27 dev->cal = devm_kzalloc(mdev->dev, val, GFP_KERNEL);
28 if (!dev->cal)
29 return -ENOMEM;
30
31 offs = is_mt7915(&dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
32
33 return mt76_get_of_eeprom(mdev, dev->cal, offs, val);
34 }
35
mt7915_check_eeprom(struct mt7915_dev * dev)36 static int mt7915_check_eeprom(struct mt7915_dev *dev)
37 {
38 u8 *eeprom = dev->mt76.eeprom.data;
39 u16 val = get_unaligned_le16(eeprom);
40
41 #define CHECK_EEPROM_ERR(match) (match ? 0 : -EINVAL)
42 switch (val) {
43 case 0x7915:
44 return CHECK_EEPROM_ERR(is_mt7915(&dev->mt76));
45 case 0x7916:
46 return CHECK_EEPROM_ERR(is_mt7916(&dev->mt76));
47 case 0x7981:
48 return CHECK_EEPROM_ERR(is_mt7981(&dev->mt76));
49 case 0x7986:
50 return CHECK_EEPROM_ERR(is_mt7986(&dev->mt76));
51 default:
52 return -EINVAL;
53 }
54 }
55
mt7915_eeprom_name(struct mt7915_dev * dev)56 static char *mt7915_eeprom_name(struct mt7915_dev *dev)
57 {
58 switch (mt76_chip(&dev->mt76)) {
59 case 0x7915:
60 return dev->dbdc_support ?
61 MT7915_EEPROM_DEFAULT_DBDC : MT7915_EEPROM_DEFAULT;
62 case 0x7981:
63 /* mt7981 only supports mt7976 and only in DBDC mode */
64 return MT7981_EEPROM_MT7976_DEFAULT_DBDC;
65 case 0x7986:
66 switch (mt7915_check_adie(dev, true)) {
67 case MT7976_ONE_ADIE_DBDC:
68 return MT7986_EEPROM_MT7976_DEFAULT_DBDC;
69 case MT7975_ONE_ADIE:
70 return MT7986_EEPROM_MT7975_DEFAULT;
71 case MT7976_ONE_ADIE:
72 return MT7986_EEPROM_MT7976_DEFAULT;
73 case MT7975_DUAL_ADIE:
74 return MT7986_EEPROM_MT7975_DUAL_DEFAULT;
75 case MT7976_DUAL_ADIE:
76 return MT7986_EEPROM_MT7976_DUAL_DEFAULT;
77 default:
78 break;
79 }
80 return NULL;
81 default:
82 return MT7916_EEPROM_DEFAULT;
83 }
84 }
85
86 static int
mt7915_eeprom_load_default(struct mt7915_dev * dev)87 mt7915_eeprom_load_default(struct mt7915_dev *dev)
88 {
89 u8 *eeprom = dev->mt76.eeprom.data;
90 const struct firmware *fw = NULL;
91 int ret;
92
93 ret = request_firmware(&fw, mt7915_eeprom_name(dev), dev->mt76.dev);
94 if (ret)
95 return ret;
96
97 if (!fw || !fw->data) {
98 dev_err(dev->mt76.dev, "Invalid default bin\n");
99 ret = -EINVAL;
100 goto out;
101 }
102
103 memcpy(eeprom, fw->data, mt7915_eeprom_size(dev));
104 dev->flash_mode = true;
105
106 out:
107 release_firmware(fw);
108
109 return ret;
110 }
111
mt7915_eeprom_load(struct mt7915_dev * dev)112 static int mt7915_eeprom_load(struct mt7915_dev *dev)
113 {
114 int ret;
115 u16 eeprom_size = mt7915_eeprom_size(dev);
116
117 ret = mt76_eeprom_init(&dev->mt76, eeprom_size);
118 if (ret < 0)
119 return ret;
120
121 if (ret) {
122 dev->flash_mode = true;
123 } else {
124 u8 free_block_num;
125 u32 block_num, i;
126 u32 eeprom_blk_size = MT7915_EEPROM_BLOCK_SIZE;
127
128 ret = mt7915_mcu_get_eeprom_free_block(dev, &free_block_num);
129 if (ret < 0)
130 return ret;
131
132 /* efuse info isn't enough */
133 if (free_block_num >= 29)
134 return -EINVAL;
135
136 /* read eeprom data from efuse */
137 block_num = DIV_ROUND_UP(eeprom_size, eeprom_blk_size);
138 for (i = 0; i < block_num; i++) {
139 ret = mt7915_mcu_get_eeprom(dev, i * eeprom_blk_size);
140 if (ret < 0)
141 return ret;
142 }
143 }
144
145 return mt7915_check_eeprom(dev);
146 }
147
mt7915_eeprom_parse_band_config(struct mt7915_phy * phy)148 static void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy)
149 {
150 struct mt7915_dev *dev = phy->dev;
151 u8 *eeprom = dev->mt76.eeprom.data;
152 u8 band = phy->mt76->band_idx;
153 u32 val;
154
155 val = eeprom[MT_EE_WIFI_CONF + band];
156 val = FIELD_GET(MT_EE_WIFI_CONF0_BAND_SEL, val);
157
158 if (!is_mt7915(&dev->mt76)) {
159 switch (val) {
160 case MT_EE_V2_BAND_SEL_5GHZ:
161 phy->mt76->cap.has_5ghz = true;
162 return;
163 case MT_EE_V2_BAND_SEL_6GHZ:
164 phy->mt76->cap.has_6ghz = true;
165 return;
166 case MT_EE_V2_BAND_SEL_5GHZ_6GHZ:
167 if (enable_6ghz) {
168 phy->mt76->cap.has_6ghz = true;
169 u8p_replace_bits(&eeprom[MT_EE_WIFI_CONF + band],
170 MT_EE_V2_BAND_SEL_6GHZ,
171 MT_EE_WIFI_CONF0_BAND_SEL);
172 } else {
173 phy->mt76->cap.has_5ghz = true;
174 u8p_replace_bits(&eeprom[MT_EE_WIFI_CONF + band],
175 MT_EE_V2_BAND_SEL_5GHZ,
176 MT_EE_WIFI_CONF0_BAND_SEL);
177 }
178 /* force to buffer mode */
179 dev->flash_mode = true;
180
181 return;
182 default:
183 phy->mt76->cap.has_2ghz = true;
184 return;
185 }
186 } else if (val == MT_EE_BAND_SEL_DEFAULT && dev->dbdc_support) {
187 val = band ? MT_EE_BAND_SEL_5GHZ : MT_EE_BAND_SEL_2GHZ;
188 }
189
190 switch (val) {
191 case MT_EE_BAND_SEL_5GHZ:
192 phy->mt76->cap.has_5ghz = true;
193 break;
194 case MT_EE_BAND_SEL_2GHZ:
195 phy->mt76->cap.has_2ghz = true;
196 break;
197 default:
198 phy->mt76->cap.has_2ghz = true;
199 phy->mt76->cap.has_5ghz = true;
200 break;
201 }
202 }
203
mt7915_eeprom_parse_hw_cap(struct mt7915_dev * dev,struct mt7915_phy * phy)204 void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
205 struct mt7915_phy *phy)
206 {
207 u8 path, nss, nss_max = 4, *eeprom = dev->mt76.eeprom.data;
208 struct mt76_phy *mphy = phy->mt76;
209 u8 band = phy->mt76->band_idx;
210
211 mt7915_eeprom_parse_band_config(phy);
212
213 /* read tx/rx path from eeprom */
214 if (is_mt7915(&dev->mt76)) {
215 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
216 eeprom[MT_EE_WIFI_CONF]);
217 } else {
218 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
219 eeprom[MT_EE_WIFI_CONF + band]);
220 }
221
222 if (!path || path > 4)
223 path = 4;
224
225 /* read tx/rx stream */
226 nss = path;
227 if (dev->dbdc_support) {
228 if (is_mt7915(&dev->mt76)) {
229 path = min_t(u8, path, 2);
230 nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B0,
231 eeprom[MT_EE_WIFI_CONF + 3]);
232 if (band)
233 nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B1,
234 eeprom[MT_EE_WIFI_CONF + 3]);
235 } else {
236 nss = FIELD_GET(MT_EE_WIFI_CONF_STREAM_NUM,
237 eeprom[MT_EE_WIFI_CONF + 2 + band]);
238 }
239
240 if (!is_mt798x(&dev->mt76))
241 nss_max = 2;
242 }
243
244 if (!nss)
245 nss = nss_max;
246 nss = min_t(u8, min_t(u8, nss_max, nss), path);
247
248 mphy->chainmask = BIT(path) - 1;
249 if (band)
250 mphy->chainmask <<= dev->chainshift;
251 mphy->antenna_mask = BIT(nss) - 1;
252 dev->chainmask |= mphy->chainmask;
253 dev->chainshift = hweight8(dev->mphy.chainmask);
254 }
255
mt7915_eeprom_init(struct mt7915_dev * dev)256 int mt7915_eeprom_init(struct mt7915_dev *dev)
257 {
258 int ret;
259
260 ret = mt7915_eeprom_load(dev);
261 if (ret < 0) {
262 if (ret != -EINVAL)
263 return ret;
264
265 dev_warn(dev->mt76.dev, "eeprom load fail, use default bin\n");
266 ret = mt7915_eeprom_load_default(dev);
267 if (ret)
268 return ret;
269 }
270
271 ret = mt7915_eeprom_load_precal(dev);
272 if (ret)
273 return ret;
274
275 mt7915_eeprom_parse_hw_cap(dev, &dev->phy);
276 memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
277 ETH_ALEN);
278
279 mt76_eeprom_override(&dev->mphy);
280
281 return 0;
282 }
283
mt7915_eeprom_get_target_power(struct mt7915_dev * dev,struct ieee80211_channel * chan,u8 chain_idx)284 int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
285 struct ieee80211_channel *chan,
286 u8 chain_idx)
287 {
288 u8 *eeprom = dev->mt76.eeprom.data;
289 int index, target_power;
290 bool tssi_on, is_7976;
291
292 if (chain_idx > 3)
293 return -EINVAL;
294
295 tssi_on = mt7915_tssi_enabled(dev, chan->band);
296 is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
297
298 if (chan->band == NL80211_BAND_2GHZ) {
299 if (is_7976) {
300 index = MT_EE_TX0_POWER_2G_V2 + chain_idx;
301 target_power = eeprom[index];
302 } else {
303 index = MT_EE_TX0_POWER_2G + chain_idx * 3;
304 target_power = eeprom[index];
305
306 if (!tssi_on)
307 target_power += eeprom[index + 1];
308 }
309 } else if (chan->band == NL80211_BAND_5GHZ) {
310 int group = mt7915_get_channel_group_5g(chan->hw_value, is_7976);
311
312 if (is_7976) {
313 index = MT_EE_TX0_POWER_5G_V2 + chain_idx * 5;
314 target_power = eeprom[index + group];
315 } else {
316 index = MT_EE_TX0_POWER_5G + chain_idx * 12;
317 target_power = eeprom[index + group];
318
319 if (!tssi_on)
320 target_power += eeprom[index + 8];
321 }
322 } else {
323 int group = mt7915_get_channel_group_6g(chan->hw_value);
324
325 index = MT_EE_TX0_POWER_6G_V2 + chain_idx * 8;
326 target_power = is_7976 ? eeprom[index + group] : 0;
327 }
328
329 return target_power;
330 }
331
mt7915_eeprom_get_power_delta(struct mt7915_dev * dev,int band)332 s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
333 {
334 u8 *eeprom = dev->mt76.eeprom.data;
335 u32 val, offs;
336 s8 delta;
337 bool is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
338
339 if (band == NL80211_BAND_2GHZ)
340 offs = is_7976 ? MT_EE_RATE_DELTA_2G_V2 : MT_EE_RATE_DELTA_2G;
341 else if (band == NL80211_BAND_5GHZ)
342 offs = is_7976 ? MT_EE_RATE_DELTA_5G_V2 : MT_EE_RATE_DELTA_5G;
343 else
344 offs = is_7976 ? MT_EE_RATE_DELTA_6G_V2 : 0;
345
346 val = eeprom[offs];
347
348 if (!offs || !(val & MT_EE_RATE_DELTA_EN))
349 return 0;
350
351 delta = FIELD_GET(MT_EE_RATE_DELTA_MASK, val);
352
353 return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
354 }
355
356 const u8 mt7915_sku_group_len[] = {
357 [SKU_CCK] = 4,
358 [SKU_OFDM] = 8,
359 [SKU_HT_BW20] = 8,
360 [SKU_HT_BW40] = 9,
361 [SKU_VHT_BW20] = 12,
362 [SKU_VHT_BW40] = 12,
363 [SKU_VHT_BW80] = 12,
364 [SKU_VHT_BW160] = 12,
365 [SKU_HE_RU26] = 12,
366 [SKU_HE_RU52] = 12,
367 [SKU_HE_RU106] = 12,
368 [SKU_HE_RU242] = 12,
369 [SKU_HE_RU484] = 12,
370 [SKU_HE_RU996] = 12,
371 [SKU_HE_RU2x996] = 12
372 };
373