eeprom.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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->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(mdev->dev, size, GFP_KERNEL);
 27	if (!dev->cal)
 28		return -ENOMEM;
 29
 30	offs = is_mt7915(&dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
 31
 32	ret = mt76_get_of_data_from_mtd(mdev, dev->cal, offs, size);
 33	if (!ret)
 34		return ret;
 35
 36	ret = mt76_get_of_data_from_nvmem(mdev, dev->cal, "precal", size);
 37	if (!ret)
 38		return ret;
 39
 40	dev_warn(mdev->dev, "missing precal data, size=%d\n", size);
 41	devm_kfree(mdev->dev, 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(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->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, 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, mt7915_eeprom_name(dev), 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->mt76, 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, &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, 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->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(&eeprom[MT_EE_WIFI_CONF + band],
181						 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(&eeprom[MT_EE_WIFI_CONF + band],
186						 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->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->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->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, &dev->phy);
284	memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
285	       ETH_ALEN);
286
287	return mt76_eeprom_override(&dev->mphy);
288}
289
290int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
291				   struct ieee80211_channel *chan,
292				   u8 chain_idx)
293{
294	u8 *eeprom = dev->mt76.eeprom.data;
295	int index, target_power;
296	bool tssi_on, is_7976;
297
298	if (chain_idx > 3)
299		return -EINVAL;
300
301	tssi_on = mt7915_tssi_enabled(dev, chan->band);
302	is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
303
304	if (chan->band == NL80211_BAND_2GHZ) {
305		if (is_7976) {
306			index = MT_EE_TX0_POWER_2G_V2 + chain_idx;
307			target_power = eeprom[index];
308		} else {
309			index = MT_EE_TX0_POWER_2G + chain_idx * 3;
310			target_power = eeprom[index];
311
312			if (!tssi_on)
313				target_power += eeprom[index + 1];
314		}
315	} else if (chan->band == NL80211_BAND_5GHZ) {
316		int group = mt7915_get_channel_group_5g(chan->hw_value, is_7976);
317
318		if (is_7976) {
319			index = MT_EE_TX0_POWER_5G_V2 + chain_idx * 5;
320			target_power = eeprom[index + group];
321		} else {
322			index = MT_EE_TX0_POWER_5G + chain_idx * 12;
323			target_power = eeprom[index + group];
324
325			if (!tssi_on)
326				target_power += eeprom[index + 8];
327		}
328	} else {
329		int group = mt7915_get_channel_group_6g(chan->hw_value);
330
331		index = MT_EE_TX0_POWER_6G_V2 + chain_idx * 8;
332		target_power = is_7976 ? eeprom[index + group] : 0;
333	}
334
335	return target_power;
336}
337
338s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
339{
340	u8 *eeprom = dev->mt76.eeprom.data;
341	u32 val, offs;
342	s8 delta;
343	bool is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
344
345	if (band == NL80211_BAND_2GHZ)
346		offs = is_7976 ? MT_EE_RATE_DELTA_2G_V2 : MT_EE_RATE_DELTA_2G;
347	else if (band == NL80211_BAND_5GHZ)
348		offs = is_7976 ? MT_EE_RATE_DELTA_5G_V2 : MT_EE_RATE_DELTA_5G;
349	else
350		offs = is_7976 ? MT_EE_RATE_DELTA_6G_V2 : 0;
351
352	val = eeprom[offs];
353
354	if (!offs || !(val & MT_EE_RATE_DELTA_EN))
355		return 0;
356
357	delta = FIELD_GET(MT_EE_RATE_DELTA_MASK, val);
358
359	return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
360}
361
362bool
363mt7915_eeprom_has_background_radar(struct mt7915_dev *dev)
364{
365	u8 val, buf[MT7915_EEPROM_BLOCK_SIZE];
366	u8 band_sel, tx_path, rx_path;
367	int offs = MT_EE_WIFI_CONF + 1;
368
369	switch (mt76_chip(&dev->mt76)) {
370	case 0x7915:
371		return true;
372	case 0x7906:
373		/* read efuse to check background radar capability */
374		if (mt7915_mcu_get_eeprom(dev, offs, buf))
375			break;
376
377		val = buf[offs % MT7915_EEPROM_BLOCK_SIZE];
378		band_sel = u8_get_bits(val, MT_EE_WIFI_CONF0_BAND_SEL);
379		tx_path = u8_get_bits(val, MT_EE_WIFI_CONF0_TX_PATH);
380		rx_path = u8_get_bits(val, MT_EE_WIFI_CONF0_RX_PATH);
381
382		return (band_sel == MT_EE_V2_BAND_SEL_5GHZ &&
383			tx_path == rx_path && rx_path == 2);
384	case 0x7981:
385	case 0x7986:
386	default:
387		break;
388	}
389
390	return false;
391}
392
393const u8 mt7915_sku_group_len[] = {
394	[SKU_CCK] = 4,
395	[SKU_OFDM] = 8,
396	[SKU_HT_BW20] = 8,
397	[SKU_HT_BW40] = 9,
398	[SKU_VHT_BW20] = 12,
399	[SKU_VHT_BW40] = 12,
400	[SKU_VHT_BW80] = 12,
401	[SKU_VHT_BW160] = 12,
402	[SKU_HE_RU26] = 12,
403	[SKU_HE_RU52] = 12,
404	[SKU_HE_RU106] = 12,
405	[SKU_HE_RU242] = 12,
406	[SKU_HE_RU484] = 12,
407	[SKU_HE_RU996] = 12,
408	[SKU_HE_RU2x996] = 12
409};