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

Source file repositories/reference/linux-study-clean/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
Extension
.c
Size
7831 bytes
Lines
357
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) {
		memset(data, 0x0, 16);
		return 0;
	}

	for (i = 0; i < 4; i++) {
		val = mt76_rr(dev, base + MT_EFUSE_RDATA(i));
		put_unaligned_le32(val, data + 4 * i);
	}

	return 0;
}

static int mt7615_efuse_init(struct mt7615_dev *dev, u32 base)
{
	int i, len = MT7615_EEPROM_SIZE;
	void *buf;
	u32 val;

	if (is_mt7663(&dev->mt76))
		len = MT7663_EEPROM_SIZE;

	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;
	if (!dev->mt76.otp.data)
		return -ENOMEM;

	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;
	}

	return 0;
}

static int mt7615_eeprom_load(struct mt7615_dev *dev, u32 addr)
{
	int ret;

	BUILD_BUG_ON(MT7615_EEPROM_FULL_SIZE < MT7663_EEPROM_SIZE);

	ret = mt76_eeprom_init(&dev->mt76, MT7615_EEPROM_FULL_SIZE);
	if (ret < 0)
		return ret;

	return mt7615_efuse_init(dev, addr);
}

static int mt7615_check_eeprom(struct mt76_dev *dev)
{
	u16 val = get_unaligned_le16(dev->eeprom.data);

	switch (val) {
	case 0x7615:
	case 0x7622:
	case 0x7663:
		return 0;
	default:
		return -EINVAL;
	}
}

static void
mt7615_eeprom_parse_hw_band_cap(struct mt7615_dev *dev)
{
	u8 val, *eeprom = dev->mt76.eeprom.data;

	if (is_mt7663(&dev->mt76)) {
		/* dual band */
		dev->mphy.cap.has_2ghz = true;
		dev->mphy.cap.has_5ghz = true;
		return;
	}

	if (is_mt7622(&dev->mt76)) {
		/* 2GHz only */
		dev->mphy.cap.has_2ghz = true;
		return;
	}

	if (is_mt7611(&dev->mt76)) {
		/* 5GHz only */

Annotation

Implementation Notes