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/*
* Copyright 2017 NXP
*
* SPDX-License-Identifier: GPL-2.0+
*
*/
#include <common.h>
#include <errno.h>
#include <asm/io.h>
#include <console.h>
#include <fuse.h>
#include <asm/mach-imx/sci/sci.h>
#include <asm/arch/sys_proto.h>
DECLARE_GLOBAL_DATA_PTR;
#define FSL_ECC_WORD_START_1 0x10
#define FSL_ECC_WORD_END_1 0x10F
#ifdef CONFIG_IMX8QM
#define FSL_ECC_WORD_START_2 0x1A0
#define FSL_ECC_WORD_END_2 0x1FF
#endif
#ifdef CONFIG_IMX8QXP
#define FSL_ECC_WORD_START_2 0x220
#define FSL_ECC_WORD_END_2 0x31F
#define FSL_QXP_FUSE_GAP_START 0x110
#define FSL_QXP_FUSE_GAP_END 0x21F
#endif
#define FSL_SIP_OTP_READ 0xc200000A
#define FSL_SIP_OTP_WRITE 0xc200000B
int fuse_read(u32 bank, u32 word, u32 *val)
{
return fuse_sense(bank, word, val);
}
int fuse_sense(u32 bank, u32 word, u32 *val)
{
if (bank != 0) {
printf("Invalid bank argument, ONLY bank 0 is supported\n");
return -EINVAL;
}
#if defined(CONFIG_SMC_FUSE)
unsigned long ret = 0, value = 0;
ret = call_imx_sip_ret2(FSL_SIP_OTP_READ, (unsigned long)word,
&value, 0, 0);
*val = (u32)value;
return ret;
#else
sc_err_t err;
sc_ipc_t ipc;
ipc = gd->arch.ipc_channel_handle;
err = sc_misc_otp_fuse_read(ipc, word, val);
if (err != SC_ERR_NONE) {
printf("fuse read error: %d\n", err);
return -EIO;
}
return 0;
#endif
}
int fuse_prog(u32 bank, u32 word, u32 val)
{
if (bank != 0) {
printf("Invalid bank argument, ONLY bank 0 is supported\n");
return -EINVAL;
}
#ifdef CONFIG_IMX8QXP
if ((word >= FSL_QXP_FUSE_GAP_START) && (word <= FSL_QXP_FUSE_GAP_END)) {
printf("Invalid word argument for this SoC\n");
return -EINVAL;
}
#endif
if (((word >= FSL_ECC_WORD_START_1) && (word <= FSL_ECC_WORD_END_1)) ||
((word >= FSL_ECC_WORD_START_2) && (word <= FSL_ECC_WORD_END_2)))
puts("Warning: Words in this index range have ECC protection and\n"
"can only be programmed once per word. Individual bit operations will\n"
"be rejected after the first one. \n");
#if defined(CONFIG_SMC_FUSE)
return call_imx_sip(FSL_SIP_OTP_WRITE, (unsigned long)word,\
(unsigned long)val, 0, 0);
#else
printf("Program fuse to i.MX8 in u-boot is forbidden\n");
return -EPERM;
#endif
}
int fuse_override(u32 bank, u32 word, u32 val)
{
printf("Override fuse to i.MX8 in u-boot is forbidden\n");
return -EPERM;
}
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