86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2025 Texas Instruments Incorporated, <www.ti.com>
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <fuse.h>
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#include <linux/arm-smccc.h>
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#include <linux/bitops.h>
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#include <string.h>
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#define K3_SIP_OTP_WRITEBUFF 0xC2000000
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#define K3_SIP_OTP_WRITE 0xC2000001
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#define K3_SIP_OTP_READ 0xC2000002
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int fuse_read(u32 bank, u32 word, u32 *val)
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{
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struct arm_smccc_res res;
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if (bank != 0U) {
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printf("Invalid bank argument, ONLY bank 0 is supported\n");
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return -EINVAL;
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}
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/* Make SiP SMC call and send the word in the parameter register */
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arm_smccc_smc(K3_SIP_OTP_READ, word,
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0, 0, 0, 0, 0, 0, &res);
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*val = res.a1;
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if (res.a0 != 0)
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printf("SMC call failed: Error code %ld\n", res.a0);
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return res.a0;
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}
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int fuse_sense(u32 bank, u32 word, u32 *val)
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{
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return fuse_read(bank, word, val);
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}
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int fuse_prog(u32 bank, u32 word, u32 val)
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{
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struct arm_smccc_res res;
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if (bank != 0U) {
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printf("Invalid bank argument, ONLY bank 0 is supported\n");
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return -EINVAL;
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}
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/* Make SiP SMC call and send the word, val and mask in the parameter register */
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arm_smccc_smc(K3_SIP_OTP_WRITE, bank, word,
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val, GENMASK(25, 0), 0, 0, 0, &res);
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if (res.a0 != 0) {
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printf("SMC call failed: Error code %ld\n", res.a0);
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return res.a0;
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}
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if (res.a1 != val) {
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printf("Readback failed, written 0x%x readback 0x%lx\n", val, res.a1);
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return -EINVAL;
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}
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return res.a0;
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}
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int fuse_override(u32 bank, u32 word, u32 val)
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{
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return -EPERM;
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}
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int fuse_writebuff(ulong addr)
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{
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struct arm_smccc_res res;
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/* Make SiP SMC call and send the addr in the parameter register */
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arm_smccc_smc(K3_SIP_OTP_WRITEBUFF, (unsigned long)addr,
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0, 0, 0, 0, 0, 0, &res);
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if (res.a0 != 0)
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printf("SMC call failed: Error code %ld\n", res.a0);
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return res.a0;
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}
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