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
8static 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 int ret;
15
16 if (!dev->flash_mode)
17 return 0;
18
19 if (val != (MT_EE_WIFI_CAL_DPD | MT_EE_WIFI_CAL_GROUP))
20 return 0;
21
22 val = MT_EE_CAL_GROUP_SIZE + MT_EE_CAL_DPD_SIZE;
23 dev->cal = devm_kzalloc(dev: mdev->dev, size: val, GFP_KERNEL);
24 if (!dev->cal)
25 return -ENOMEM;
26
27 offs = is_mt7915(dev: &dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
28
29 ret = mt76_get_of_data_from_mtd(dev: mdev, eep: dev->cal, offset: offs, len: val);
30 if (!ret)
31 return ret;
32
33 return mt76_get_of_data_from_nvmem(dev: mdev, eep: dev->cal, cell_name: "precal", len: val);
34}
35
36static int mt7915_check_eeprom(struct mt7915_dev *dev)
37{
38 u8 *eeprom = dev->mt76.eeprom.data;
39 u16 val = get_unaligned_le16(p: 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
56static char *mt7915_eeprom_name(struct mt7915_dev *dev)
57{
58 switch (mt76_chip(dev: &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, sku: 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
86static int
87mt7915_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: &fw, name: mt7915_eeprom_name(dev), device: 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
106out:
107 release_firmware(fw);
108
109 return ret;
110}
111
112static 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: &dev->mt76, len: 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, block_num: &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, offset: i * eeprom_blk_size);
140 if (ret < 0)
141 return ret;
142 }
143 }
144
145 return mt7915_check_eeprom(dev);
146}
147
148static 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: &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 phy->mt76->cap.has_5ghz = true;
168 phy->mt76->cap.has_6ghz = true;
169 return;
170 default:
171 phy->mt76->cap.has_2ghz = true;
172 return;
173 }
174 } else if (val == MT_EE_BAND_SEL_DEFAULT && dev->dbdc_support) {
175 val = band ? MT_EE_BAND_SEL_5GHZ : MT_EE_BAND_SEL_2GHZ;
176 }
177
178 switch (val) {
179 case MT_EE_BAND_SEL_5GHZ:
180 phy->mt76->cap.has_5ghz = true;
181 break;
182 case MT_EE_BAND_SEL_2GHZ:
183 phy->mt76->cap.has_2ghz = true;
184 break;
185 default:
186 phy->mt76->cap.has_2ghz = true;
187 phy->mt76->cap.has_5ghz = true;
188 break;
189 }
190}
191
192void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
193 struct mt7915_phy *phy)
194{
195 u8 path, nss, nss_max = 4, *eeprom = dev->mt76.eeprom.data;
196 struct mt76_phy *mphy = phy->mt76;
197 u8 band = phy->mt76->band_idx;
198
199 mt7915_eeprom_parse_band_config(phy);
200
201 /* read tx/rx path from eeprom */
202 if (is_mt7915(dev: &dev->mt76)) {
203 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
204 eeprom[MT_EE_WIFI_CONF]);
205 } else {
206 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
207 eeprom[MT_EE_WIFI_CONF + band]);
208 }
209
210 if (!path || path > 4)
211 path = 4;
212
213 /* read tx/rx stream */
214 nss = path;
215 if (dev->dbdc_support) {
216 if (is_mt7915(dev: &dev->mt76)) {
217 path = min_t(u8, path, 2);
218 nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B0,
219 eeprom[MT_EE_WIFI_CONF + 3]);
220 if (band)
221 nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B1,
222 eeprom[MT_EE_WIFI_CONF + 3]);
223 } else {
224 nss = FIELD_GET(MT_EE_WIFI_CONF_STREAM_NUM,
225 eeprom[MT_EE_WIFI_CONF + 2 + band]);
226 }
227
228 if (!is_mt798x(dev: &dev->mt76))
229 nss_max = 2;
230 }
231
232 if (!nss)
233 nss = nss_max;
234 nss = min_t(u8, min_t(u8, nss_max, nss), path);
235
236 mphy->chainmask = BIT(path) - 1;
237 if (band)
238 mphy->chainmask <<= dev->chainshift;
239 mphy->antenna_mask = BIT(nss) - 1;
240 dev->chainmask |= mphy->chainmask;
241 dev->chainshift = hweight8(dev->mphy.chainmask);
242}
243
244int mt7915_eeprom_init(struct mt7915_dev *dev)
245{
246 int ret;
247
248 ret = mt7915_eeprom_load(dev);
249 if (ret < 0) {
250 if (ret != -EINVAL)
251 return ret;
252
253 dev_warn(dev->mt76.dev, "eeprom load fail, use default bin\n");
254 ret = mt7915_eeprom_load_default(dev);
255 if (ret)
256 return ret;
257 }
258
259 ret = mt7915_eeprom_load_precal(dev);
260 if (ret)
261 return ret;
262
263 mt7915_eeprom_parse_hw_cap(dev, phy: &dev->phy);
264 memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
265 ETH_ALEN);
266
267 mt76_eeprom_override(phy: &dev->mphy);
268
269 return 0;
270}
271
272int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
273 struct ieee80211_channel *chan,
274 u8 chain_idx)
275{
276 u8 *eeprom = dev->mt76.eeprom.data;
277 int index, target_power;
278 bool tssi_on, is_7976;
279
280 if (chain_idx > 3)
281 return -EINVAL;
282
283 tssi_on = mt7915_tssi_enabled(dev, band: chan->band);
284 is_7976 = mt7915_check_adie(dev, sku: false) || is_mt7916(dev: &dev->mt76);
285
286 if (chan->band == NL80211_BAND_2GHZ) {
287 if (is_7976) {
288 index = MT_EE_TX0_POWER_2G_V2 + chain_idx;
289 target_power = eeprom[index];
290 } else {
291 index = MT_EE_TX0_POWER_2G + chain_idx * 3;
292 target_power = eeprom[index];
293
294 if (!tssi_on)
295 target_power += eeprom[index + 1];
296 }
297 } else if (chan->band == NL80211_BAND_5GHZ) {
298 int group = mt7915_get_channel_group_5g(channel: chan->hw_value, is_7976);
299
300 if (is_7976) {
301 index = MT_EE_TX0_POWER_5G_V2 + chain_idx * 5;
302 target_power = eeprom[index + group];
303 } else {
304 index = MT_EE_TX0_POWER_5G + chain_idx * 12;
305 target_power = eeprom[index + group];
306
307 if (!tssi_on)
308 target_power += eeprom[index + 8];
309 }
310 } else {
311 int group = mt7915_get_channel_group_6g(channel: chan->hw_value);
312
313 index = MT_EE_TX0_POWER_6G_V2 + chain_idx * 8;
314 target_power = is_7976 ? eeprom[index + group] : 0;
315 }
316
317 return target_power;
318}
319
320s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
321{
322 u8 *eeprom = dev->mt76.eeprom.data;
323 u32 val, offs;
324 s8 delta;
325 bool is_7976 = mt7915_check_adie(dev, sku: false) || is_mt7916(dev: &dev->mt76);
326
327 if (band == NL80211_BAND_2GHZ)
328 offs = is_7976 ? MT_EE_RATE_DELTA_2G_V2 : MT_EE_RATE_DELTA_2G;
329 else if (band == NL80211_BAND_5GHZ)
330 offs = is_7976 ? MT_EE_RATE_DELTA_5G_V2 : MT_EE_RATE_DELTA_5G;
331 else
332 offs = is_7976 ? MT_EE_RATE_DELTA_6G_V2 : 0;
333
334 val = eeprom[offs];
335
336 if (!offs || !(val & MT_EE_RATE_DELTA_EN))
337 return 0;
338
339 delta = FIELD_GET(MT_EE_RATE_DELTA_MASK, val);
340
341 return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
342}
343
344const u8 mt7915_sku_group_len[] = {
345 [SKU_CCK] = 4,
346 [SKU_OFDM] = 8,
347 [SKU_HT_BW20] = 8,
348 [SKU_HT_BW40] = 9,
349 [SKU_VHT_BW20] = 12,
350 [SKU_VHT_BW40] = 12,
351 [SKU_VHT_BW80] = 12,
352 [SKU_VHT_BW160] = 12,
353 [SKU_HE_RU26] = 12,
354 [SKU_HE_RU52] = 12,
355 [SKU_HE_RU106] = 12,
356 [SKU_HE_RU242] = 12,
357 [SKU_HE_RU484] = 12,
358 [SKU_HE_RU996] = 12,
359 [SKU_HE_RU2x996] = 12
360};
361

source code of linux/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c