96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2019 NXP
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*/
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#include <common.h>
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#include <console.h>
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#include <errno.h>
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#include <fuse.h>
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#include <asm/arch/sci/sci.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/global_data.h>
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#include <linux/arm-smccc.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define FSL_ECC_WORD_START_1 0x10
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#define FSL_ECC_WORD_END_1 0x10F
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#ifdef CONFIG_IMX8QM
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#define FSL_ECC_WORD_START_2 0x1A0
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#define FSL_ECC_WORD_END_2 0x1FF
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#elif defined(CONFIG_IMX8QXP)
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#define FSL_ECC_WORD_START_2 0x220
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#define FSL_ECC_WORD_END_2 0x31F
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#endif
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#define FSL_QXP_FUSE_GAP_START 0x110
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#define FSL_QXP_FUSE_GAP_END 0x21F
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#define FSL_SIP_OTP_READ 0xc200000A
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#define FSL_SIP_OTP_WRITE 0xc200000B
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int fuse_read(u32 bank, u32 word, u32 *val)
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{
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return fuse_sense(bank, word, val);
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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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struct arm_smccc_res res;
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if (bank != 0) {
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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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arm_smccc_smc(FSL_SIP_OTP_READ, (unsigned long)word, 0, 0,
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0, 0, 0, 0, &res);
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*val = (u32)res.a1;
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return res.a0;
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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 != 0) {
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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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if (IS_ENABLED(CONFIG_IMX8QXP)) {
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if (word >= FSL_QXP_FUSE_GAP_START &&
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word <= FSL_QXP_FUSE_GAP_END) {
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printf("Invalid word argument for this SoC\n");
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return -EINVAL;
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}
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}
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if ((word >= FSL_ECC_WORD_START_1 && word <= FSL_ECC_WORD_END_1) ||
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(word >= FSL_ECC_WORD_START_2 && word <= FSL_ECC_WORD_END_2)) {
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puts("Warning: Words in this index range have ECC protection\n"
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"and can only be programmed once per word. Individual bit\n"
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"operations will be rejected after the first one.\n"
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"\n\n Really program this word? <y/N>\n");
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if (!confirm_yesno()) {
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puts("Word programming aborted\n");
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return -EPERM;
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}
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}
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arm_smccc_smc(FSL_SIP_OTP_WRITE, (unsigned long)word,
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(unsigned long)val, 0, 0, 0, 0, 0, &res);
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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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printf("Override fuse to i.MX8 in u-boot is forbidden\n");
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return -EPERM;
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}
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