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
9static bool enable_6ghz;
10module_param(enable_6ghz, bool, 0644);
11MODULE_PARM_DESC(enable_6ghz, "Enable 6 GHz instead of 5 GHz on hardware that supports both");
12
13static 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 offs = is_mt7915(dev: &dev->mt76) ? MT_EE_DO_PRE_CAL : MT_EE_DO_PRE_CAL_V2;
18 u32 size, val = eeprom[offs];
19 int ret;
20
21 if (!dev->flash_mode || !val)
22 return 0;
23
24 size = mt7915_get_cal_group_size(dev) + mt7915_get_cal_dpd_size(dev);
25
26 dev->cal = devm_kzalloc(dev: mdev->dev, size, GFP_KERNEL);
27 if (!dev->cal)
28 return -ENOMEM;
29
30 offs = is_mt7915(dev: &dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
31
32 ret = mt76_get_of_data_from_mtd(dev: mdev, eep: dev->cal, offset: offs, len: size);
33 if (!ret)
34 return ret;
35
36 ret = mt76_get_of_data_from_nvmem(dev: mdev, eep: dev->cal, cell_name: "precal", len: size);
37 if (!ret)
38 return ret;
39
40 dev_warn(mdev->dev, "missing precal data, size=%d\n", size);
41 devm_kfree(dev: mdev->dev, p: dev->cal);
42 dev->cal = NULL;
43
44 return ret;
45}
46
47static int mt7915_check_eeprom(struct mt7915_dev *dev)
48{
49 u8 *eeprom = dev->mt76.eeprom.data;
50 u16 val = get_unaligned_le16(p: eeprom);
51
52#define CHECK_EEPROM_ERR(match) (match ? 0 : -EINVAL)
53 switch (val) {
54 case 0x7915:
55 return CHECK_EEPROM_ERR(is_mt7915(&dev->mt76));
56 case 0x7916:
57 return CHECK_EEPROM_ERR(is_mt7916(&dev->mt76));
58 case 0x7981:
59 return CHECK_EEPROM_ERR(is_mt7981(&dev->mt76));
60 case 0x7986:
61 return CHECK_EEPROM_ERR(is_mt7986(&dev->mt76));
62 default:
63 return -EINVAL;
64 }
65}
66
67static char *mt7915_eeprom_name(struct mt7915_dev *dev)
68{
69 switch (mt76_chip(dev: &dev->mt76)) {
70 case 0x7915:
71 return dev->dbdc_support ?
72 MT7915_EEPROM_DEFAULT_DBDC : MT7915_EEPROM_DEFAULT;
73 case 0x7981:
74 /* mt7981 only supports mt7976 and only in DBDC mode */
75 return MT7981_EEPROM_MT7976_DEFAULT_DBDC;
76 case 0x7986:
77 switch (mt7915_check_adie(dev, sku: true)) {
78 case MT7976_ONE_ADIE_DBDC:
79 return MT7986_EEPROM_MT7976_DEFAULT_DBDC;
80 case MT7975_ONE_ADIE:
81 return MT7986_EEPROM_MT7975_DEFAULT;
82 case MT7976_ONE_ADIE:
83 return MT7986_EEPROM_MT7976_DEFAULT;
84 case MT7975_DUAL_ADIE:
85 return MT7986_EEPROM_MT7975_DUAL_DEFAULT;
86 case MT7976_DUAL_ADIE:
87 return MT7986_EEPROM_MT7976_DUAL_DEFAULT;
88 default:
89 break;
90 }
91 return NULL;
92 default:
93 return MT7916_EEPROM_DEFAULT;
94 }
95}
96
97static int
98mt7915_eeprom_load_default(struct mt7915_dev *dev)
99{
100 u8 *eeprom = dev->mt76.eeprom.data;
101 const struct firmware *fw = NULL;
102 int ret;
103
104 ret = request_firmware(fw: &fw, name: mt7915_eeprom_name(dev), device: dev->mt76.dev);
105 if (ret)
106 return ret;
107
108 if (!fw || !fw->data) {
109 dev_err(dev->mt76.dev, "Invalid default bin\n");
110 ret = -EINVAL;
111 goto out;
112 }
113
114 memcpy(eeprom, fw->data, mt7915_eeprom_size(dev));
115 dev->flash_mode = true;
116
117out:
118 release_firmware(fw);
119
120 return ret;
121}
122
123static int mt7915_eeprom_load(struct mt7915_dev *dev)
124{
125 int ret;
126 u16 eeprom_size = mt7915_eeprom_size(dev);
127
128 ret = mt76_eeprom_init(dev: &dev->mt76, len: eeprom_size);
129 if (ret < 0)
130 return ret;
131
132 if (ret) {
133 dev->flash_mode = true;
134 } else {
135 u8 free_block_num;
136 u32 block_num, i;
137 u32 eeprom_blk_size = MT7915_EEPROM_BLOCK_SIZE;
138
139 ret = mt7915_mcu_get_eeprom_free_block(dev, block_num: &free_block_num);
140 if (ret < 0)
141 return ret;
142
143 /* efuse info isn't enough */
144 if (free_block_num >= 29)
145 return -EINVAL;
146
147 /* read eeprom data from efuse */
148 block_num = DIV_ROUND_UP(eeprom_size, eeprom_blk_size);
149 for (i = 0; i < block_num; i++) {
150 ret = mt7915_mcu_get_eeprom(dev, offset: i * eeprom_blk_size, NULL);
151 if (ret < 0)
152 return ret;
153 }
154 }
155
156 return mt7915_check_eeprom(dev);
157}
158
159static void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy)
160{
161 struct mt7915_dev *dev = phy->dev;
162 u8 *eeprom = dev->mt76.eeprom.data;
163 u8 band = phy->mt76->band_idx;
164 u32 val;
165
166 val = eeprom[MT_EE_WIFI_CONF + band];
167 val = FIELD_GET(MT_EE_WIFI_CONF0_BAND_SEL, val);
168
169 if (!is_mt7915(dev: &dev->mt76)) {
170 switch (val) {
171 case MT_EE_V2_BAND_SEL_5GHZ:
172 phy->mt76->cap.has_5ghz = true;
173 return;
174 case MT_EE_V2_BAND_SEL_6GHZ:
175 phy->mt76->cap.has_6ghz = true;
176 return;
177 case MT_EE_V2_BAND_SEL_5GHZ_6GHZ:
178 if (enable_6ghz) {
179 phy->mt76->cap.has_6ghz = true;
180 u8p_replace_bits(p: &eeprom[MT_EE_WIFI_CONF + band],
181 val: MT_EE_V2_BAND_SEL_6GHZ,
182 MT_EE_WIFI_CONF0_BAND_SEL);
183 } else {
184 phy->mt76->cap.has_5ghz = true;
185 u8p_replace_bits(p: &eeprom[MT_EE_WIFI_CONF + band],
186 val: MT_EE_V2_BAND_SEL_5GHZ,
187 MT_EE_WIFI_CONF0_BAND_SEL);
188 }
189 /* force to buffer mode */
190 dev->flash_mode = true;
191
192 return;
193 default:
194 phy->mt76->cap.has_2ghz = true;
195 return;
196 }
197 } else if (val == MT_EE_BAND_SEL_DEFAULT && dev->dbdc_support) {
198 val = band ? MT_EE_BAND_SEL_5GHZ : MT_EE_BAND_SEL_2GHZ;
199 }
200
201 switch (val) {
202 case MT_EE_BAND_SEL_5GHZ:
203 phy->mt76->cap.has_5ghz = true;
204 break;
205 case MT_EE_BAND_SEL_2GHZ:
206 phy->mt76->cap.has_2ghz = true;
207 break;
208 default:
209 phy->mt76->cap.has_2ghz = true;
210 phy->mt76->cap.has_5ghz = true;
211 break;
212 }
213}
214
215void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
216 struct mt7915_phy *phy)
217{
218 u8 path, nss, nss_max = 4, *eeprom = dev->mt76.eeprom.data;
219 struct mt76_phy *mphy = phy->mt76;
220 u8 band = phy->mt76->band_idx;
221
222 mt7915_eeprom_parse_band_config(phy);
223
224 /* read tx/rx path from eeprom */
225 if (is_mt7915(dev: &dev->mt76)) {
226 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
227 eeprom[MT_EE_WIFI_CONF]);
228 } else {
229 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
230 eeprom[MT_EE_WIFI_CONF + band]);
231 }
232
233 if (!path || path > 4)
234 path = 4;
235
236 /* read tx/rx stream */
237 nss = path;
238 if (dev->dbdc_support) {
239 if (is_mt7915(dev: &dev->mt76)) {
240 path = min_t(u8, path, 2);
241 nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B0,
242 eeprom[MT_EE_WIFI_CONF + 3]);
243 if (band)
244 nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B1,
245 eeprom[MT_EE_WIFI_CONF + 3]);
246 } else {
247 nss = FIELD_GET(MT_EE_WIFI_CONF_STREAM_NUM,
248 eeprom[MT_EE_WIFI_CONF + 2 + band]);
249 }
250
251 if (!is_mt798x(dev: &dev->mt76))
252 nss_max = 2;
253 }
254
255 if (!nss)
256 nss = nss_max;
257 nss = min_t(u8, min_t(u8, nss_max, nss), path);
258
259 mphy->chainmask = BIT(path) - 1;
260 if (band)
261 mphy->chainmask <<= dev->chainshift;
262 mphy->antenna_mask = BIT(nss) - 1;
263 dev->chainmask |= mphy->chainmask;
264 dev->chainshift = hweight8(dev->mphy.chainmask);
265}
266
267int mt7915_eeprom_init(struct mt7915_dev *dev)
268{
269 int ret;
270
271 ret = mt7915_eeprom_load(dev);
272 if (ret < 0) {
273 if (ret != -EINVAL)
274 return ret;
275
276 dev_warn(dev->mt76.dev, "eeprom load fail, use default bin\n");
277 ret = mt7915_eeprom_load_default(dev);
278 if (ret)
279 return ret;
280 }
281
282 mt7915_eeprom_load_precal(dev);
283 mt7915_eeprom_parse_hw_cap(dev, phy: &dev->phy);
284 memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
285 ETH_ALEN);
286
287 mt76_eeprom_override(phy: &dev->mphy);
288
289 return 0;
290}
291
292int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
293 struct ieee80211_channel *chan,
294 u8 chain_idx)
295{
296 u8 *eeprom = dev->mt76.eeprom.data;
297 int index, target_power;
298 bool tssi_on, is_7976;
299
300 if (chain_idx > 3)
301 return -EINVAL;
302
303 tssi_on = mt7915_tssi_enabled(dev, band: chan->band);
304 is_7976 = mt7915_check_adie(dev, sku: false) || is_mt7916(dev: &dev->mt76);
305
306 if (chan->band == NL80211_BAND_2GHZ) {
307 if (is_7976) {
308 index = MT_EE_TX0_POWER_2G_V2 + chain_idx;
309 target_power = eeprom[index];
310 } else {
311 index = MT_EE_TX0_POWER_2G + chain_idx * 3;
312 target_power = eeprom[index];
313
314 if (!tssi_on)
315 target_power += eeprom[index + 1];
316 }
317 } else if (chan->band == NL80211_BAND_5GHZ) {
318 int group = mt7915_get_channel_group_5g(channel: chan->hw_value, is_7976);
319
320 if (is_7976) {
321 index = MT_EE_TX0_POWER_5G_V2 + chain_idx * 5;
322 target_power = eeprom[index + group];
323 } else {
324 index = MT_EE_TX0_POWER_5G + chain_idx * 12;
325 target_power = eeprom[index + group];
326
327 if (!tssi_on)
328 target_power += eeprom[index + 8];
329 }
330 } else {
331 int group = mt7915_get_channel_group_6g(channel: chan->hw_value);
332
333 index = MT_EE_TX0_POWER_6G_V2 + chain_idx * 8;
334 target_power = is_7976 ? eeprom[index + group] : 0;
335 }
336
337 return target_power;
338}
339
340s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
341{
342 u8 *eeprom = dev->mt76.eeprom.data;
343 u32 val, offs;
344 s8 delta;
345 bool is_7976 = mt7915_check_adie(dev, sku: false) || is_mt7916(dev: &dev->mt76);
346
347 if (band == NL80211_BAND_2GHZ)
348 offs = is_7976 ? MT_EE_RATE_DELTA_2G_V2 : MT_EE_RATE_DELTA_2G;
349 else if (band == NL80211_BAND_5GHZ)
350 offs = is_7976 ? MT_EE_RATE_DELTA_5G_V2 : MT_EE_RATE_DELTA_5G;
351 else
352 offs = is_7976 ? MT_EE_RATE_DELTA_6G_V2 : 0;
353
354 val = eeprom[offs];
355
356 if (!offs || !(val & MT_EE_RATE_DELTA_EN))
357 return 0;
358
359 delta = FIELD_GET(MT_EE_RATE_DELTA_MASK, val);
360
361 return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
362}
363
364bool
365mt7915_eeprom_has_background_radar(struct mt7915_dev *dev)
366{
367 u8 val, buf[MT7915_EEPROM_BLOCK_SIZE];
368 u8 band_sel, tx_path, rx_path;
369 int offs = MT_EE_WIFI_CONF + 1;
370
371 switch (mt76_chip(dev: &dev->mt76)) {
372 case 0x7915:
373 return true;
374 case 0x7906:
375 /* read efuse to check background radar capability */
376 if (mt7915_mcu_get_eeprom(dev, offset: offs, read_buf: buf))
377 break;
378
379 val = buf[offs % MT7915_EEPROM_BLOCK_SIZE];
380 band_sel = u8_get_bits(v: val, MT_EE_WIFI_CONF0_BAND_SEL);
381 tx_path = u8_get_bits(v: val, MT_EE_WIFI_CONF0_TX_PATH);
382 rx_path = u8_get_bits(v: val, MT_EE_WIFI_CONF0_RX_PATH);
383
384 return (band_sel == MT_EE_V2_BAND_SEL_5GHZ &&
385 tx_path == rx_path && rx_path == 2);
386 case 0x7981:
387 case 0x7986:
388 default:
389 break;
390 }
391
392 return false;
393}
394
395const u8 mt7915_sku_group_len[] = {
396 [SKU_CCK] = 4,
397 [SKU_OFDM] = 8,
398 [SKU_HT_BW20] = 8,
399 [SKU_HT_BW40] = 9,
400 [SKU_VHT_BW20] = 12,
401 [SKU_VHT_BW40] = 12,
402 [SKU_VHT_BW80] = 12,
403 [SKU_VHT_BW160] = 12,
404 [SKU_HE_RU26] = 12,
405 [SKU_HE_RU52] = 12,
406 [SKU_HE_RU106] = 12,
407 [SKU_HE_RU242] = 12,
408 [SKU_HE_RU484] = 12,
409 [SKU_HE_RU996] = 12,
410 [SKU_HE_RU2x996] = 12
411};
412

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