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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"
"\n\n Really program this word? <y/N> \n");
if(!confirm_yesno()) {
puts("Word programming aborted\n");
return -EPERM;
}
}
#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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