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Commit f9461a68 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Felix Fietkau
Browse files

mt76: mt7615: add support for mtd eeprom parsing 



Calibration data are often available on a specific mtd partition on
embedded devices. Take into account eeprom calibration data if
available.

Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent eadfd98f

drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c

+23 −6
Original line number Diff line number Diff line
@@ -42,13 +42,13 @@ static int mt7615_efuse_read(struct mt7615_dev *dev, u32 base, 


static int mt7615_efuse_init(struct mt7615_dev *dev)

{

	u32 base = mt7615_reg_map(dev, MT_EFUSE_BASE);

	int len = MT7615_EEPROM_SIZE;

	int ret, i;

	u32 val, base = mt7615_reg_map(dev, MT_EFUSE_BASE);

	int i, len = MT7615_EEPROM_SIZE;

	void *buf;



	if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY)

		return -EINVAL;

	val = mt76_rr(dev, base + MT_EFUSE_BASE_CTRL);

	if (val & MT_EFUSE_BASE_CTRL_EMPTY)

		return 0;



	dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL);

	dev->mt76.otp.size = len;
@@ -57,6 +57,8 @@ static int mt7615_efuse_init(struct mt7615_dev *dev) 


	buf = dev->mt76.otp.data;

	for (i = 0; i + 16 <= len; i += 16) {

		int ret;



		ret = mt7615_efuse_read(dev, base, i, buf + i);

		if (ret)

			return ret;
@@ -76,6 +78,18 @@ static int mt7615_eeprom_load(struct mt7615_dev *dev) 
	return mt7615_efuse_init(dev);

}



static int mt7615_check_eeprom(struct mt76_dev *dev)

{

	u16 val = get_unaligned_le16(dev->eeprom.data);



	switch (val) {

	case 0x7615:

		return 0;

	default:

		return -EINVAL;

	}

}



int mt7615_eeprom_init(struct mt7615_dev *dev)

{

	int ret;
@@ -84,7 +98,10 @@ int mt7615_eeprom_init(struct mt7615_dev *dev) 
	if (ret < 0)

		return ret;



	memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data, MT7615_EEPROM_SIZE);

	ret = mt7615_check_eeprom(&dev->mt76);

	if (ret && dev->mt76.otp.data)

		memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data,

		       MT7615_EEPROM_SIZE);



	dev->mt76.cap.has_2ghz = true;

	dev->mt76.cap.has_5ghz = true;