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(mdev->dev, val, GFP_KERNEL);
24	if (!dev->cal)
25		return -ENOMEM;
26
27	offs = is_mt7915(&dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
28
29	ret = mt76_get_of_data_from_mtd(mdev, dev->cal, offs, val);
30	if (!ret)
31		return ret;
32
33	return mt76_get_of_data_from_nvmem(mdev, dev->cal, "precal", 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(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->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
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, 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
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->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
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->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->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->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->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, &dev->phy);
264	memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
265	       ETH_ALEN);
266
267	mt76_eeprom_override(&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, chan->band);
284	is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&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(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(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, false) || is_mt7916(&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