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187 lines
4.5 KiB
187 lines
4.5 KiB
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
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/* Copyright(c) 2018-2019 Realtek Corporation |
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*/ |
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#include <linux/iopoll.h> |
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#include "main.h" |
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#include "efuse.h" |
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#include "reg.h" |
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#include "debug.h" |
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#define RTW_EFUSE_BANK_WIFI 0x0 |
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static void switch_efuse_bank(struct rtw_dev *rtwdev) |
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{ |
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rtw_write32_mask(rtwdev, REG_LDO_EFUSE_CTRL, BIT_MASK_EFUSE_BANK_SEL, |
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RTW_EFUSE_BANK_WIFI); |
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} |
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#define invalid_efuse_header(hdr1, hdr2) \ |
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((hdr1) == 0xff || (((hdr1) & 0x1f) == 0xf && (hdr2) == 0xff)) |
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#define invalid_efuse_content(word_en, i) \ |
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(((word_en) & BIT(i)) != 0x0) |
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#define get_efuse_blk_idx_2_byte(hdr1, hdr2) \ |
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((((hdr2) & 0xf0) >> 1) | (((hdr1) >> 5) & 0x07)) |
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#define get_efuse_blk_idx_1_byte(hdr1) \ |
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(((hdr1) & 0xf0) >> 4) |
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#define block_idx_to_logical_idx(blk_idx, i) \ |
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(((blk_idx) << 3) + ((i) << 1)) |
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/* efuse header format |
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* |
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* | 7 5 4 0 | 7 4 3 0 | 15 8 7 0 | |
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* block[2:0] 0 1111 block[6:3] word_en[3:0] byte0 byte1 |
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* | header 1 (optional) | header 2 | word N | |
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* |
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* word_en: 4 bits each word. 0 -> write; 1 -> not write |
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* N: 1~4, depends on word_en |
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*/ |
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static int rtw_dump_logical_efuse_map(struct rtw_dev *rtwdev, u8 *phy_map, |
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u8 *log_map) |
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{ |
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u32 physical_size = rtwdev->efuse.physical_size; |
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u32 protect_size = rtwdev->efuse.protect_size; |
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u32 logical_size = rtwdev->efuse.logical_size; |
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u32 phy_idx, log_idx; |
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u8 hdr1, hdr2; |
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u8 blk_idx; |
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u8 word_en; |
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int i; |
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for (phy_idx = 0; phy_idx < physical_size - protect_size;) { |
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hdr1 = phy_map[phy_idx]; |
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hdr2 = phy_map[phy_idx + 1]; |
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if (invalid_efuse_header(hdr1, hdr2)) |
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break; |
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if ((hdr1 & 0x1f) == 0xf) { |
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/* 2-byte header format */ |
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blk_idx = get_efuse_blk_idx_2_byte(hdr1, hdr2); |
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word_en = hdr2 & 0xf; |
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phy_idx += 2; |
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} else { |
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/* 1-byte header format */ |
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blk_idx = get_efuse_blk_idx_1_byte(hdr1); |
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word_en = hdr1 & 0xf; |
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phy_idx += 1; |
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} |
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for (i = 0; i < 4; i++) { |
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if (invalid_efuse_content(word_en, i)) |
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continue; |
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log_idx = block_idx_to_logical_idx(blk_idx, i); |
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if (phy_idx + 1 > physical_size - protect_size || |
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log_idx + 1 > logical_size) |
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return -EINVAL; |
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log_map[log_idx] = phy_map[phy_idx]; |
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log_map[log_idx + 1] = phy_map[phy_idx + 1]; |
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phy_idx += 2; |
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} |
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} |
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return 0; |
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} |
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static int rtw_dump_physical_efuse_map(struct rtw_dev *rtwdev, u8 *map) |
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{ |
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struct rtw_chip_info *chip = rtwdev->chip; |
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u32 size = rtwdev->efuse.physical_size; |
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u32 efuse_ctl; |
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u32 addr; |
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u32 cnt; |
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rtw_chip_efuse_grant_on(rtwdev); |
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switch_efuse_bank(rtwdev); |
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/* disable 2.5V LDO */ |
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chip->ops->cfg_ldo25(rtwdev, false); |
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efuse_ctl = rtw_read32(rtwdev, REG_EFUSE_CTRL); |
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for (addr = 0; addr < size; addr++) { |
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efuse_ctl &= ~(BIT_MASK_EF_DATA | BITS_EF_ADDR); |
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efuse_ctl |= (addr & BIT_MASK_EF_ADDR) << BIT_SHIFT_EF_ADDR; |
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rtw_write32(rtwdev, REG_EFUSE_CTRL, efuse_ctl & (~BIT_EF_FLAG)); |
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cnt = 1000000; |
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do { |
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udelay(1); |
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efuse_ctl = rtw_read32(rtwdev, REG_EFUSE_CTRL); |
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if (--cnt == 0) |
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return -EBUSY; |
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} while (!(efuse_ctl & BIT_EF_FLAG)); |
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*(map + addr) = (u8)(efuse_ctl & BIT_MASK_EF_DATA); |
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} |
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rtw_chip_efuse_grant_off(rtwdev); |
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return 0; |
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} |
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int rtw_read8_physical_efuse(struct rtw_dev *rtwdev, u16 addr, u8 *data) |
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{ |
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u32 efuse_ctl; |
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int ret; |
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rtw_write32_mask(rtwdev, REG_EFUSE_CTRL, 0x3ff00, addr); |
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rtw_write32_clr(rtwdev, REG_EFUSE_CTRL, BIT_EF_FLAG); |
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ret = read_poll_timeout(rtw_read32, efuse_ctl, efuse_ctl & BIT_EF_FLAG, |
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1000, 100000, false, rtwdev, REG_EFUSE_CTRL); |
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if (ret) { |
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*data = EFUSE_READ_FAIL; |
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return ret; |
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} |
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*data = rtw_read8(rtwdev, REG_EFUSE_CTRL); |
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return 0; |
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} |
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EXPORT_SYMBOL(rtw_read8_physical_efuse); |
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int rtw_parse_efuse_map(struct rtw_dev *rtwdev) |
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{ |
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struct rtw_chip_info *chip = rtwdev->chip; |
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struct rtw_efuse *efuse = &rtwdev->efuse; |
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u32 phy_size = efuse->physical_size; |
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u32 log_size = efuse->logical_size; |
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u8 *phy_map = NULL; |
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u8 *log_map = NULL; |
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int ret = 0; |
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phy_map = kmalloc(phy_size, GFP_KERNEL); |
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log_map = kmalloc(log_size, GFP_KERNEL); |
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if (!phy_map || !log_map) { |
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ret = -ENOMEM; |
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goto out_free; |
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} |
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ret = rtw_dump_physical_efuse_map(rtwdev, phy_map); |
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if (ret) { |
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rtw_err(rtwdev, "failed to dump efuse physical map\n"); |
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goto out_free; |
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} |
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memset(log_map, 0xff, log_size); |
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ret = rtw_dump_logical_efuse_map(rtwdev, phy_map, log_map); |
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if (ret) { |
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rtw_err(rtwdev, "failed to dump efuse logical map\n"); |
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goto out_free; |
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} |
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ret = chip->ops->read_efuse(rtwdev, log_map); |
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if (ret) { |
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rtw_err(rtwdev, "failed to read efuse map\n"); |
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goto out_free; |
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} |
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out_free: |
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kfree(log_map); |
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kfree(phy_map); |
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return ret; |
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}
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