8851B hardware version A and B use different firmware, but register version
code of these two are the same, so add this helper to read efuse version to
determine which version is installed.
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw89/efuse.c | 21 +++++++++++++++++++++
drivers/net/wireless/realtek/rtw89/efuse.h | 1 +
2 files changed, 22 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw89/efuse.c b/drivers/net/wireless/realtek/rtw89/efuse.c
index 7bd4f8558e03b..2aaf4d013e464 100644
--- a/drivers/net/wireless/realtek/rtw89/efuse.c
+++ b/drivers/net/wireless/realtek/rtw89/efuse.c
@@ -7,6 +7,10 @@
#include "mac.h"
#include "reg.h"
+#define EF_FV_OFSET 0x5ea
+#define EF_CV_MASK GENMASK(7, 4)
+#define EF_CV_INV 15
+
enum rtw89_efuse_bank {
RTW89_EFUSE_BANK_WIFI,
RTW89_EFUSE_BANK_BT,
@@ -328,3 +332,20 @@ int rtw89_parse_phycap_map(struct rtw89_dev *rtwdev)
return ret;
}
+
+int rtw89_read_efuse_ver(struct rtw89_dev *rtwdev, u8 *ecv)
+{
+ int ret;
+ u8 val;
+
+ ret = rtw89_dump_physical_efuse_map(rtwdev, &val, EF_FV_OFSET, 1, false);
+ if (ret)
+ return ret;
+
+ *ecv = u8_get_bits(val, EF_CV_MASK);
+ if (*ecv == EF_CV_INV)
+ return -ENOENT;
+
+ return 0;
+}
+EXPORT_SYMBOL(rtw89_read_efuse_ver);
diff --git a/drivers/net/wireless/realtek/rtw89/efuse.h b/drivers/net/wireless/realtek/rtw89/efuse.h
index 622ff95e74763..79071aff28de3 100644
--- a/drivers/net/wireless/realtek/rtw89/efuse.h
+++ b/drivers/net/wireless/realtek/rtw89/efuse.h
@@ -9,5 +9,6 @@
int rtw89_parse_efuse_map(struct rtw89_dev *rtwdev);
int rtw89_parse_phycap_map(struct rtw89_dev *rtwdev);
+int rtw89_read_efuse_ver(struct rtw89_dev *rtwdev, u8 *efv);
#endif
--
2.25.1
