drivers/net/wireless/realtek/rtw88/efuse.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/realtek/rtw88/efuse.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/realtek/rtw88/efuse.c
Extension
.c
Size
4614 bytes
Lines
188
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

if ((hdr1 & 0x1f) == 0xf) {
			/* 2-byte header format */
			blk_idx = get_efuse_blk_idx_2_byte(hdr1, hdr2);
			word_en = hdr2 & 0xf;
			phy_idx += 2;
		} else {
			/* 1-byte header format */
			blk_idx = get_efuse_blk_idx_1_byte(hdr1);
			word_en = hdr1 & 0xf;
			phy_idx += 1;
		}

		for (i = 0; i < 4; i++) {
			if (invalid_efuse_content(word_en, i))
				continue;

			log_idx = block_idx_to_logical_idx(blk_idx, i);
			if (phy_idx + 1 > physical_size - protect_size ||
			    log_idx + 1 > logical_size)
				return -EINVAL;

			log_map[log_idx] = phy_map[phy_idx];
			log_map[log_idx + 1] = phy_map[phy_idx + 1];
			phy_idx += 2;
		}
	}
	return 0;
}

static int rtw_dump_physical_efuse_map(struct rtw_dev *rtwdev, u8 *map)
{
	const struct rtw_chip_info *chip = rtwdev->chip;
	u32 size = rtwdev->efuse.physical_size;
	u32 efuse_ctl;
	u32 addr;
	u32 cnt;

	rtw_chip_efuse_grant_on(rtwdev);

	switch_efuse_bank(rtwdev);

	/* disable 2.5V LDO */
	chip->ops->cfg_ldo25(rtwdev, false);

	efuse_ctl = rtw_read32(rtwdev, REG_EFUSE_CTRL);

	for (addr = 0; addr < size; addr++) {
		efuse_ctl &= ~(BIT_MASK_EF_DATA | BITS_EF_ADDR);
		efuse_ctl |= (addr & BIT_MASK_EF_ADDR) << BIT_SHIFT_EF_ADDR;
		rtw_write32(rtwdev, REG_EFUSE_CTRL, efuse_ctl & (~BIT_EF_FLAG));

		cnt = 1000000;
		do {
			udelay(1);
			efuse_ctl = rtw_read32(rtwdev, REG_EFUSE_CTRL);
			if (--cnt == 0)
				return -EBUSY;
		} while (!(efuse_ctl & BIT_EF_FLAG));

		*(map + addr) = (u8)(efuse_ctl & BIT_MASK_EF_DATA);
	}

	rtw_chip_efuse_grant_off(rtwdev);

	return 0;
}

int rtw_read8_physical_efuse(struct rtw_dev *rtwdev, u16 addr, u8 *data)
{
	u32 efuse_ctl;
	int ret;

	rtw_write32_mask(rtwdev, REG_EFUSE_CTRL, 0x3ff00, addr);
	rtw_write32_clr(rtwdev, REG_EFUSE_CTRL, BIT_EF_FLAG);

	ret = read_poll_timeout(rtw_read32, efuse_ctl, efuse_ctl & BIT_EF_FLAG,
				1000, 100000, false, rtwdev, REG_EFUSE_CTRL);
	if (ret) {
		*data = EFUSE_READ_FAIL;
		return ret;
	}

	*data = rtw_read8(rtwdev, REG_EFUSE_CTRL);

	return 0;
}
EXPORT_SYMBOL(rtw_read8_physical_efuse);

int rtw_parse_efuse_map(struct rtw_dev *rtwdev)
{

Annotation

Implementation Notes