diff -drupN a/drivers/char/sunxi-scr/smartcard.c b/drivers/char/sunxi-scr/smartcard.c
--- a/drivers/char/sunxi-scr/smartcard.c	1970-01-01 03:00:00.000000000 +0300
+++ b/drivers/char/sunxi-scr/smartcard.c	2022-06-12 05:28:14.000000000 +0300
@@ -0,0 +1,325 @@
+/*
+ * drivers/char/sunxi-scr/smartcard.c
+ *
+ * Copyright (C) 2016 Allwinner.
+ * fuzhaoke <fuzhaoke@allwinnertech.com>
+ *
+ * Decode for ISO7816 smart card
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include "smartcard.h"
+
+void smartcard_ta1_decode(struct smc_atr_para *psmc_atr, uint8_t ta1)
+{
+	pr_debug("%s: enter!!\n", __func__);
+
+	switch ((ta1>>4)&0xf) {
+	case 0x0:
+		psmc_atr->FMAX = 4;
+		psmc_atr->F = 372;
+		break;
+	case 0x1:
+		psmc_atr->FMAX = 5;
+		psmc_atr->F = 372;
+		break;
+	case 0x2:
+		psmc_atr->FMAX = 6;
+		psmc_atr->F = 558;
+		break;
+	case 0x3:
+		psmc_atr->FMAX = 8;
+		psmc_atr->F = 744;
+		break;
+	case 0x4:
+		psmc_atr->FMAX = 12;
+		psmc_atr->F = 1116;
+		break;
+	case 0x5:
+		psmc_atr->FMAX = 16;
+		psmc_atr->F = 1488;
+		break;
+	case 0x6:
+		psmc_atr->FMAX = 20;
+		psmc_atr->F = 1860;
+		break;
+	case 0x9:
+		psmc_atr->FMAX = 5;
+		psmc_atr->F = 512;
+		break;
+	case 0xA:
+		psmc_atr->FMAX = 7;
+		psmc_atr->F = 768;
+		break;
+	case 0xB:
+		psmc_atr->FMAX = 10;
+		psmc_atr->F = 1024;
+		break;
+	case 0xC:
+		psmc_atr->FMAX = 15;
+		psmc_atr->F = 1536;
+		break;
+	case 0xD:
+		psmc_atr->FMAX = 20;
+		psmc_atr->F = 2048;
+		break;
+	default:  /* 0x7/0x8/0xE/0xF */
+		psmc_atr->FMAX = 4;
+		psmc_atr->F = 372;
+		pr_err("Unsupport ta1 = 0x%x\n", ta1);
+		break;
+	}
+
+	switch (ta1&0xf) {
+	case 0x1:
+		psmc_atr->D = 1;
+		break;
+	case 0x2:
+		psmc_atr->D = 2;
+		break;
+	case 0x3:
+		psmc_atr->D = 4;
+		break;
+	case 0x4:
+		psmc_atr->D = 8;
+		break;
+	case 0x5:
+		psmc_atr->D = 16;
+		break;
+	case 0x6:
+		psmc_atr->D = 32;
+		break;
+	case 0x8:
+		psmc_atr->D = 12;
+		break;
+	case 0x9:
+		psmc_atr->D = 20;
+		break;
+	default: /* 0x0/0x7/0xA/0xB/0xC/0xD/0xE/0xF */
+		psmc_atr->D = 1;
+		pr_err("Unsupport ta1 = 0x%x\n", ta1);
+		break;
+	}
+}
+
+void smartcard_tb1_decode(struct smc_atr_para *psmc_atr, uint8_t tb1)
+{
+	pr_debug("%s: enter!!\n", __func__);
+
+	switch ((tb1>>5)&0x3) {
+	case 0:
+		psmc_atr->I = 25;
+		break;
+	case 1:
+		psmc_atr->I = 50;
+		break;
+	case 2:
+		psmc_atr->I = 100;
+		break;
+	default:
+		psmc_atr->I = 50;
+	}
+
+	if (((tb1&0x1f) > 4) && ((tb1&0x1f) < 26))
+		psmc_atr->P = (tb1&0x1f); /* 5~25 in Volts */
+	else if (0 == (tb1&0x1f))
+		psmc_atr->P = 0;
+	else
+		psmc_atr->P = 5;
+}
+
+/* ATR data format: max 33 byte(include TS)
+ * [TS|T0|TA1|TB1|TC1|TD1|TA2|TB2|TC2|TD2|...|T1|T2|........|TK|TCK]
+ *       |-------- max 16 byte --------------|-- max 15 byte --|verify
+ * |--------------------- max 33 byte -------------------------|
+ * TS: Initial character
+ *	0x3b:direct convention, 0x3f:inverse convention
+ * T0: Format character
+ *	[bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0]
+ *	|------- Y1 --------|-------- K --------|
+ *	Y1: indicator for the presence of the interface character
+ *		TA1 is transmitted when bit[4] = 1
+ *		TB1 is transmitted when bit[5] = 1
+ *		TC1 is transmitted when bit[6] = 1
+ *		TD1 is transmitted when bit[7] = 1
+ *	K: history number
+ * TAi: Interface character
+ *	code FI,DI
+ * TBi: Interface character
+ *	code II,PI
+ * TCi: Interface character
+ *	code N
+ * TDi: Interface character
+ *	code Yi+1, T
+ *	[bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0]
+ *	|------ Yi + 1 -----|-------- T --------|
+ *	Yi + 1: indicator for the presence of the interface character
+ *		TAi+1 is transmitted when bit[4] = 1
+ *		TBi+1 is transmitted when bit[5] = 1
+ *		TCi+1 is transmitted when bit[6] = 1
+ *		TDi+1 is transmitted when bit[7] = 1
+ *	T: Protocol type for subsequent transmission
+ *		T=0: character transmit
+ *		T=1: block transmit
+ *		T=other: reserved
+ * T1~TK: history byte, information of the card like manufacture name
+ * TCK: verify character, make sure the data is correctly
+*/
+void smartcard_atr_decode(struct smc_atr_para *psmc_atr, struct smc_pps_para *psmc_pps,
+			  uint8_t *pdata, uint8_t with_ts)
+{
+	uint8_t index = 0;
+	uint8_t temp;
+	uint8_t i;
+
+	pr_debug("%s: Enter...\n", __func__);
+
+	psmc_pps->ppss = 0xff;
+	psmc_pps->pps0 = 0;
+
+	if (with_ts) {
+		psmc_atr->TS = pdata[0]; /* TS */
+		index++;
+	}
+	temp = pdata[index]; /* T0 */
+	index++;
+	psmc_atr->TK_NUM = temp & 0xf;
+
+	/* TA1 */
+	if (temp & 0x10) {
+		smartcard_ta1_decode(psmc_atr, pdata[index]);
+		psmc_pps->pps0 |= 0x1<<4;
+		psmc_pps->pps1 = pdata[index];
+		index++;
+	}
+
+	/* TB1 */
+	if (temp & 0x20) {
+		smartcard_tb1_decode(psmc_atr, pdata[index]);
+		index++;
+	}
+
+	/* TC1 */
+	if (temp & 0x40) {
+		psmc_atr->N = pdata[index] & 0xff;
+		index++;
+	}
+
+	/* TD1 */
+	if (temp & 0x80) {
+		pr_debug("%s: TD1 parse 0x%x !!\n", __func__, pdata[index]);
+		temp = pdata[index];
+		psmc_atr->T = temp & 0xf;
+		psmc_pps->pps0 |= temp & 0xf;
+
+		/* Adjust Guard Time */
+		if (psmc_atr->N == 0xff) {
+			if (psmc_atr->T == 1)
+				psmc_atr->N = 1;
+			else
+				psmc_atr->N = 2;
+		}
+		index++;
+	} else {
+		if (psmc_atr->N == 0xff)
+			psmc_atr->N = 2;
+		goto rx_tk;
+	}
+
+	/* TA2 */
+	if (temp & 0x10) {
+		pr_debug("TA2 Exist!!\n");
+		index++;
+	}
+
+	/* TB2 */
+	if (temp & 0x20) {
+		pr_debug("TB2 Exist!!\n");
+		index++;
+	}
+
+	/* TC2 */
+	if (temp & 0x40) {
+		pr_debug("TC2 Exist!!\n");
+		index++;
+	}
+
+	/* TD2 */
+	if (temp & 0x80) {
+		pr_debug("TD2 Exist!!\n");
+		temp = pdata[index];
+		index++;
+	} else {
+		goto rx_tk;
+	}
+
+	/* TA3 */
+	if (temp & 0x10) {
+		pr_debug("TA3 Exist!!\n");
+		index++;
+	}
+
+	/* TB3 */
+	if (temp & 0x20) {
+		pr_debug("TB3 Exist!!\n");
+		index++;
+	}
+
+	/* TC3 */
+	if (temp & 0x40) {
+		pr_debug("TC3 Exist!!\n");
+		index++;
+	}
+
+	/* TD3 */
+	if (temp & 0x80) {
+		pr_debug("TD3 Exist!!\n");
+		temp = pdata[index];
+		index++;
+	} else {
+		goto rx_tk;
+	}
+
+	/* TA4 */
+	if (temp & 0x10) {
+		pr_debug("TA4 Exist!!\n");
+		index++;
+	}
+
+	/* TB4 */
+	if (temp & 0x20) {
+		pr_debug("TB4 Exist!!\n");
+		index++;
+	}
+
+	/* TC4 */
+	if (temp & 0x40) {
+		pr_debug("TC4 Exist!!\n");
+		index++;
+	}
+
+	/* TD4 */
+	if (temp & 0x80) {
+		pr_debug("TD4 Exist!!\n");
+		temp = pdata[index];
+		index++;
+	}
+
+rx_tk:
+	for (i = 0; i < (psmc_atr->TK_NUM); i++)
+		psmc_atr->TK[i] = pdata[index++];
+
+	psmc_pps->pck = psmc_pps->ppss;
+	psmc_pps->pck ^= psmc_pps->pps0;
+	if (psmc_pps->pps0&(0x1<<4))
+		psmc_pps->pck ^= psmc_pps->pps1;
+	if (psmc_pps->pps0&(0x1<<5))
+		psmc_pps->pck ^= psmc_pps->pps2;
+	if (psmc_pps->pps0&(0x1<<6))
+		psmc_pps->pck ^= psmc_pps->pps3;
+}