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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2025 Texas Instruments Incorporated, <www.ti.com>
*/
#include <errno.h>
#include <stdio.h>
#include <fuse.h>
#include <linux/arm-smccc.h>
#include <string.h>
#define K3_SIP_OTP_WRITEBUFF 0xC2000000
#define K3_SIP_OTP_WRITE 0xC2000001
#define K3_SIP_OTP_READ 0xC2000002
int fuse_read(u32 bank, u32 word, u32 *val)
{
struct arm_smccc_res res;
if (bank != 0U) {
printf("Invalid bank argument, ONLY bank 0 is supported\n");
return -EINVAL;
}
/* Make SiP SMC call and send the word in the parameter register */
arm_smccc_smc(K3_SIP_OTP_READ, word,
0, 0, 0, 0, 0, 0, &res);
*val = res.a1;
if (res.a0 != 0)
printf("SMC call failed: Error code %lu\n", res.a0);
return res.a0;
}
int fuse_sense(u32 bank, u32 word, u32 *val)
{
return -EPERM;
}
int fuse_prog(u32 bank, u32 word, u32 val)
{
struct arm_smccc_res res;
u32 mask = val;
if (bank != 0U) {
printf("Invalid bank argument, ONLY bank 0 is supported\n");
return -EINVAL;
}
/* Make SiP SMC call and send the word, val and mask in the parameter register */
arm_smccc_smc(K3_SIP_OTP_WRITE, word,
val, mask, 0, 0, 0, 0, &res);
if (res.a0 != 0)
printf("SMC call failed: Error code %lu\n", res.a0);
return res.a0;
}
int fuse_override(u32 bank, u32 word, u32 val)
{
return -EPERM;
}
int fuse_writebuff(ulong addr)
{
struct arm_smccc_res res;
/* Make SiP SMC call and send the addr in the parameter register */
arm_smccc_smc(K3_SIP_OTP_WRITEBUFF, (unsigned long)addr,
0, 0, 0, 0, 0, 0, &res);
if (res.a0 != 0)
printf("SMC call failed: Error code %lu\n", res.a0);
return res.a0;
}
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