diff options
Diffstat (limited to 'drivers/net/wireless/realtek/rtw89/efuse.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw89/efuse.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw89/efuse.c b/drivers/net/wireless/realtek/rtw89/efuse.c index e1236079a84a..6c6c763510af 100644 --- a/drivers/net/wireless/realtek/rtw89/efuse.c +++ b/drivers/net/wireless/realtek/rtw89/efuse.c @@ -11,11 +11,38 @@ #define EF_CV_MASK GENMASK(7, 4) #define EF_CV_INV 15 +#define EFUSE_B1_MSSDEVTYPE_MASK GENMASK(3, 0) +#define EFUSE_B1_MSSCUSTIDX0_MASK GENMASK(7, 4) +#define EFUSE_B2_MSSKEYNUM_MASK GENMASK(3, 0) +#define EFUSE_B2_MSSCUSTIDX1_MASK BIT(6) + +#define EFUSE_EXTERNALPN_ADDR_AX 0x5EC +#define EFUSE_CUSTOMER_ADDR_AX 0x5ED +#define EFUSE_SERIALNUM_ADDR_AX 0x5ED + +#define EFUSE_B1_EXTERNALPN_MASK GENMASK(7, 0) +#define EFUSE_B2_CUSTOMER_MASK GENMASK(3, 0) +#define EFUSE_B2_SERIALNUM_MASK GENMASK(6, 4) + +#define OTP_KEY_INFO_NUM 2 + +static const u8 otp_key_info_externalPN[OTP_KEY_INFO_NUM] = {0x0, 0x0}; +static const u8 otp_key_info_customer[OTP_KEY_INFO_NUM] = {0x0, 0x1}; +static const u8 otp_key_info_serialNum[OTP_KEY_INFO_NUM] = {0x0, 0x1}; + enum rtw89_efuse_bank { RTW89_EFUSE_BANK_WIFI, RTW89_EFUSE_BANK_BT, }; +enum rtw89_efuse_mss_dev_type { + MSS_DEV_TYPE_FWSEC_DEF = 0xF, + MSS_DEV_TYPE_FWSEC_WINLIN_INBOX = 0xC, + MSS_DEV_TYPE_FWSEC_NONLIN_INBOX_NON_COB = 0xA, + MSS_DEV_TYPE_FWSEC_NONLIN_INBOX_COB = 0x9, + MSS_DEV_TYPE_FWSEC_NONWIN_INBOX = 0x6, +}; + static int rtw89_switch_efuse_bank(struct rtw89_dev *rtwdev, enum rtw89_efuse_bank bank) { @@ -354,3 +381,126 @@ int rtw89_read_efuse_ver(struct rtw89_dev *rtwdev, u8 *ecv) return 0; } EXPORT_SYMBOL(rtw89_read_efuse_ver); + +static u8 get_mss_dev_type_idx(struct rtw89_dev *rtwdev, u8 mss_dev_type) +{ + switch (mss_dev_type) { + case MSS_DEV_TYPE_FWSEC_WINLIN_INBOX: + mss_dev_type = 0x0; + break; + case MSS_DEV_TYPE_FWSEC_NONLIN_INBOX_NON_COB: + mss_dev_type = 0x1; + break; + case MSS_DEV_TYPE_FWSEC_NONLIN_INBOX_COB: + mss_dev_type = 0x2; + break; + case MSS_DEV_TYPE_FWSEC_NONWIN_INBOX: + mss_dev_type = 0x3; + break; + case MSS_DEV_TYPE_FWSEC_DEF: + mss_dev_type = RTW89_FW_MSS_DEV_TYPE_FWSEC_DEF; + break; + default: + rtw89_warn(rtwdev, "unknown mss_dev_type %d", mss_dev_type); + mss_dev_type = RTW89_FW_MSS_DEV_TYPE_FWSEC_INV; + break; + } + + return mss_dev_type; +} + +int rtw89_efuse_recognize_mss_info_v1(struct rtw89_dev *rtwdev, u8 b1, u8 b2) +{ + const struct rtw89_chip_info *chip = rtwdev->chip; + struct rtw89_fw_secure *sec = &rtwdev->fw.sec; + u8 mss_dev_type; + + if (chip->chip_id == RTL8852B && b1 == 0xFF && b2 == 0x6E) { + mss_dev_type = MSS_DEV_TYPE_FWSEC_NONLIN_INBOX_NON_COB; + sec->mss_cust_idx = 0; + sec->mss_key_num = 0; + + goto mss_dev_type; + } + + mss_dev_type = u8_get_bits(b1, EFUSE_B1_MSSDEVTYPE_MASK); + sec->mss_cust_idx = 0x1F - (u8_get_bits(b1, EFUSE_B1_MSSCUSTIDX0_MASK) | + u8_get_bits(b2, EFUSE_B2_MSSCUSTIDX1_MASK) << 4); + sec->mss_key_num = 0xF - u8_get_bits(b2, EFUSE_B2_MSSKEYNUM_MASK); + +mss_dev_type: + sec->mss_dev_type = get_mss_dev_type_idx(rtwdev, mss_dev_type); + if (sec->mss_dev_type == RTW89_FW_MSS_DEV_TYPE_FWSEC_INV) { + rtw89_warn(rtwdev, "invalid mss_dev_type %d\n", mss_dev_type); + return -ENOENT; + } + + sec->can_mss_v1 = true; + + return 0; +} + +static +int rtw89_efuse_recognize_mss_index_v0(struct rtw89_dev *rtwdev, u8 b1, u8 b2) +{ + struct rtw89_fw_secure *sec = &rtwdev->fw.sec; + u8 externalPN; + u8 serialNum; + u8 customer; + u8 i; + + externalPN = 0xFF - u8_get_bits(b1, EFUSE_B1_EXTERNALPN_MASK); + customer = 0xF - u8_get_bits(b2, EFUSE_B2_CUSTOMER_MASK); + serialNum = 0x7 - u8_get_bits(b2, EFUSE_B2_SERIALNUM_MASK); + + for (i = 0; i < OTP_KEY_INFO_NUM; i++) { + if (externalPN == otp_key_info_externalPN[i] && + customer == otp_key_info_customer[i] && + serialNum == otp_key_info_serialNum[i]) { + sec->mss_idx = i; + sec->can_mss_v0 = true; + return 0; + } + } + + return -ENOENT; +} + +int rtw89_efuse_read_fw_secure_ax(struct rtw89_dev *rtwdev) +{ + struct rtw89_fw_secure *sec = &rtwdev->fw.sec; + u32 sec_addr = EFUSE_EXTERNALPN_ADDR_AX; + u32 sec_size = 2; + u8 sec_map[2]; + u8 b1, b2; + int ret; + + ret = rtw89_dump_physical_efuse_map(rtwdev, sec_map, + sec_addr, sec_size, false); + if (ret) { + rtw89_warn(rtwdev, "failed to dump secsel map\n"); + return ret; + } + + b1 = sec_map[0]; + b2 = sec_map[1]; + + if (b1 == 0xFF && b2 == 0xFF) + return 0; + + rtw89_efuse_recognize_mss_index_v0(rtwdev, b1, b2); + rtw89_efuse_recognize_mss_info_v1(rtwdev, b1, b2); + if (!sec->can_mss_v1 && !sec->can_mss_v0) + goto out; + + sec->secure_boot = true; + +out: + rtw89_debug(rtwdev, RTW89_DBG_FW, + "MSS secure_boot=%d(%d/%d) dev_type=%d cust_idx=%d key_num=%d mss_index=%d\n", + sec->secure_boot, sec->can_mss_v0, sec->can_mss_v1, + sec->mss_dev_type, sec->mss_cust_idx, + sec->mss_key_num, sec->mss_idx); + + return 0; +} |