mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 07:31:15 +00:00
c3600e1f92
Add support of fuse command (read/write/program/sense) on bank 0 to access to BSEC SAFMEM (4096 OTP bits). Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
116 lines
2.1 KiB
C
116 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <misc.h>
|
|
#include <errno.h>
|
|
#include <dm/device.h>
|
|
#include <dm/uclass.h>
|
|
|
|
#define STM32MP_OTP_BANK 0
|
|
|
|
/*
|
|
* The 'fuse' command API
|
|
*/
|
|
int fuse_read(u32 bank, u32 word, u32 *val)
|
|
{
|
|
int ret = 0;
|
|
struct udevice *dev;
|
|
|
|
switch (bank) {
|
|
case STM32MP_OTP_BANK:
|
|
ret = uclass_get_device_by_driver(UCLASS_MISC,
|
|
DM_GET_DRIVER(stm32mp_bsec),
|
|
&dev);
|
|
if (ret)
|
|
return ret;
|
|
ret = misc_read(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
|
|
val, 4);
|
|
break;
|
|
|
|
default:
|
|
printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int fuse_prog(u32 bank, u32 word, u32 val)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
switch (bank) {
|
|
case STM32MP_OTP_BANK:
|
|
ret = uclass_get_device_by_driver(UCLASS_MISC,
|
|
DM_GET_DRIVER(stm32mp_bsec),
|
|
&dev);
|
|
if (ret)
|
|
return ret;
|
|
ret = misc_write(dev, word * 4 + STM32_BSEC_OTP_OFFSET,
|
|
&val, 4);
|
|
break;
|
|
|
|
default:
|
|
printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int fuse_sense(u32 bank, u32 word, u32 *val)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
switch (bank) {
|
|
case STM32MP_OTP_BANK:
|
|
ret = uclass_get_device_by_driver(UCLASS_MISC,
|
|
DM_GET_DRIVER(stm32mp_bsec),
|
|
&dev);
|
|
if (ret)
|
|
return ret;
|
|
ret = misc_read(dev, word * 4 + STM32_BSEC_OTP_OFFSET, val, 4);
|
|
break;
|
|
|
|
default:
|
|
printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int fuse_override(u32 bank, u32 word, u32 val)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
switch (bank) {
|
|
case STM32MP_OTP_BANK:
|
|
ret = uclass_get_device_by_driver(UCLASS_MISC,
|
|
DM_GET_DRIVER(stm32mp_bsec),
|
|
&dev);
|
|
if (ret)
|
|
return ret;
|
|
ret = misc_write(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
|
|
&val, 4);
|
|
break;
|
|
|
|
default:
|
|
printf("stm32mp %s: wrong value for bank %i\n",
|
|
__func__, bank);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|