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