break;
        case BTC_RPT_TYPE_NULLSTA:
                pcinfo = &pfwinfo->rpt_fbtc_nullsta.cinfo;
-               if (chip->chip_id == RTL8852A) {
+               if (ver->fcxnullsta == 1) {
                        pfinfo = &pfwinfo->rpt_fbtc_nullsta.finfo;
-                       pcinfo->req_len = sizeof(pfwinfo->rpt_fbtc_nullsta.finfo);
+                       pcinfo->req_len = sizeof(pfwinfo->rpt_fbtc_nullsta.finfo.v1);
+               } else if (ver->fcxnullsta == 2) {
+                       pfinfo = &pfwinfo->rpt_fbtc_nullsta.finfo.v2;
+                       pcinfo->req_len = sizeof(pfwinfo->rpt_fbtc_nullsta.finfo.v2);
                } else {
-                       pfinfo = &pfwinfo->rpt_fbtc_nullsta.finfo_v1;
-                       pcinfo->req_len = sizeof(pfwinfo->rpt_fbtc_nullsta.finfo_v1);
+                       goto err;
                }
                pcinfo->req_fver = ver->fcxnullsta;
                break;
 
 static void _show_fbtc_nullsta(struct rtw89_dev *rtwdev, struct seq_file *m)
 {
-       const struct rtw89_chip_info *chip = rtwdev->chip;
        struct rtw89_btc *btc = &rtwdev->btc;
+       const struct rtw89_btc_ver *ver = btc->ver;
        struct rtw89_btc_btf_fwinfo *pfwinfo = &btc->fwinfo;
        struct rtw89_btc_rpt_cmn_info *pcinfo;
-       struct rtw89_btc_fbtc_cynullsta *ns;
-       struct rtw89_btc_fbtc_cynullsta_v1 *ns_v1;
+       union rtw89_btc_fbtc_cynullsta_info *ns;
        u8 i = 0;
 
        if (!btc->dm.tdma_now.rxflctrl)
        if (!pcinfo->valid)
                return;
 
-       if (chip->chip_id == RTL8852A) {
-               ns = &pfwinfo->rpt_fbtc_nullsta.finfo;
-
+       ns = &pfwinfo->rpt_fbtc_nullsta.finfo;
+       if (ver->fcxnullsta == 1) {
                seq_printf(m, " %-15s : ", "[null_sta]");
 
                for (i = 0; i < 2; i++) {
                        else
                                seq_printf(m, "null-%d", i);
                        seq_printf(m, "[ok:%d/",
-                                  le32_to_cpu(ns->result[i][1]));
+                                  le32_to_cpu(ns->v1.result[i][1]));
                        seq_printf(m, "fail:%d/",
-                                  le32_to_cpu(ns->result[i][0]));
+                                  le32_to_cpu(ns->v1.result[i][0]));
                        seq_printf(m, "on_time:%d/",
-                                  le32_to_cpu(ns->result[i][2]));
+                                  le32_to_cpu(ns->v1.result[i][2]));
                        seq_printf(m, "retry:%d/",
-                                  le32_to_cpu(ns->result[i][3]));
+                                  le32_to_cpu(ns->v1.result[i][3]));
                        seq_printf(m, "avg_t:%d.%03d/",
-                                  le32_to_cpu(ns->avg_t[i]) / 1000,
-                                  le32_to_cpu(ns->avg_t[i]) % 1000);
+                                  le32_to_cpu(ns->v1.avg_t[i]) / 1000,
+                                  le32_to_cpu(ns->v1.avg_t[i]) % 1000);
                        seq_printf(m, "max_t:%d.%03d]",
-                                  le32_to_cpu(ns->max_t[i]) / 1000,
-                                  le32_to_cpu(ns->max_t[i]) % 1000);
+                                  le32_to_cpu(ns->v1.max_t[i]) / 1000,
+                                  le32_to_cpu(ns->v1.max_t[i]) % 1000);
                }
        } else {
-               ns_v1 = &pfwinfo->rpt_fbtc_nullsta.finfo_v1;
-
                seq_printf(m, " %-15s : ", "[null_sta]");
-
                for (i = 0; i < 2; i++) {
                        if (i != 0)
                                seq_printf(m, ", null-%d", i);
                        else
                                seq_printf(m, "null-%d", i);
                        seq_printf(m, "[Tx:%d/",
-                                  le32_to_cpu(ns_v1->result[i][4]));
+                                  le32_to_cpu(ns->v2.result[i][4]));
                        seq_printf(m, "[ok:%d/",
-                                  le32_to_cpu(ns_v1->result[i][1]));
+                                  le32_to_cpu(ns->v2.result[i][1]));
                        seq_printf(m, "fail:%d/",
-                                  le32_to_cpu(ns_v1->result[i][0]));
+                                  le32_to_cpu(ns->v2.result[i][0]));
                        seq_printf(m, "on_time:%d/",
-                                  le32_to_cpu(ns_v1->result[i][2]));
+                                  le32_to_cpu(ns->v2.result[i][2]));
                        seq_printf(m, "retry:%d/",
-                                  le32_to_cpu(ns_v1->result[i][3]));
+                                  le32_to_cpu(ns->v2.result[i][3]));
                        seq_printf(m, "avg_t:%d.%03d/",
-                                  le32_to_cpu(ns_v1->avg_t[i]) / 1000,
-                                  le32_to_cpu(ns_v1->avg_t[i]) % 1000);
+                                  le32_to_cpu(ns->v2.avg_t[i]) / 1000,
+                                  le32_to_cpu(ns->v2.avg_t[i]) % 1000);
                        seq_printf(m, "max_t:%d.%03d]",
-                                  le32_to_cpu(ns_v1->max_t[i]) / 1000,
-                                  le32_to_cpu(ns_v1->max_t[i]) % 1000);
+                                  le32_to_cpu(ns->v2.max_t[i]) / 1000,
+                                  le32_to_cpu(ns->v2.max_t[i]) % 1000);
                }
        }
        seq_puts(m, "\n");
 
        struct rtw89_btc_fbtc_cysta_v4 v4;
 };
 
-struct rtw89_btc_fbtc_cynullsta { /* cycle null statistics */
+struct rtw89_btc_fbtc_cynullsta_v1 { /* cycle null statistics */
        u8 fver; /* btc_ver::fcxnullsta */
        u8 rsvd;
        __le16 rsvd2;
        __le32 result[2][4]; /* 0:fail, 1:ok, 2:on_time, 3:retry */
 } __packed;
 
-struct rtw89_btc_fbtc_cynullsta_v1 { /* cycle null statistics */
+struct rtw89_btc_fbtc_cynullsta_v2 { /* cycle null statistics */
        u8 fver; /* btc_ver::fcxnullsta */
        u8 rsvd;
        __le16 rsvd2;
        __le32 result[2][5]; /* 0:fail, 1:ok, 2:on_time, 3:retry, 4:tx */
 } __packed;
 
+union rtw89_btc_fbtc_cynullsta_info {
+       struct rtw89_btc_fbtc_cynullsta_v1 v1; /* info from fw */
+       struct rtw89_btc_fbtc_cynullsta_v2 v2;
+};
+
 struct rtw89_btc_fbtc_btver {
        u8 fver; /* btc_ver::fcxbtver */
        u8 rsvd;
 
 struct rtw89_btc_rpt_fbtc_nullsta {
        struct rtw89_btc_rpt_cmn_info cinfo; /* common info, by driver */
-       union {
-               struct rtw89_btc_fbtc_cynullsta finfo; /* info from fw */
-               struct rtw89_btc_fbtc_cynullsta_v1 finfo_v1; /* info from fw */
-       };
+       union rtw89_btc_fbtc_cynullsta_info finfo;
 };
 
 struct rtw89_btc_rpt_fbtc_mreg {