stm32mp_fuse.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*/
#include <common.h>
#include <command.h>
#include <fuse.h>
#include <misc.h>
#include <errno.h>
#include <dm/device.h>
#include <dm/uclass.h>
#include <power/stpmic1.h>
#define STM32MP_OTP_BANK 0
#define STM32MP_NVM_BANK 1
/*
* The 'fuse' command API
*/
int fuse_read(u32 bank, u32 word, u32 *val)
{
int ret;
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);
if (ret != 4)
ret = -EINVAL;
else
ret = 0;
break;
#ifdef CONFIG_PMIC_STPMIC1
case STM32MP_NVM_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stpmic1_nvm),
&dev);
if (ret)
return ret;
*val = 0;
ret = misc_read(dev, -word, val, 1);
if (ret != 1)
ret = -EINVAL;
else
ret = 0;
break;
#endif /* CONFIG_PMIC_STPMIC1 */
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);
if (ret != 4)
ret = -EINVAL;
else
ret = 0;
break;
#ifdef CONFIG_PMIC_STPMIC1
case STM32MP_NVM_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stpmic1_nvm),
&dev);
if (ret)
return ret;
ret = misc_write(dev, word, &val, 1);
if (ret != 1)
ret = -EINVAL;
else
ret = 0;
break;
#endif /* CONFIG_PMIC_STPMIC1 */
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);
if (ret != 4)
ret = -EINVAL;
else
ret = 0;
break;
#ifdef CONFIG_PMIC_STPMIC1
case STM32MP_NVM_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stpmic1_nvm),
&dev);
if (ret)
return ret;
*val = 0;
ret = misc_read(dev, word, val, 1);
if (ret != 1)
ret = -EINVAL;
else
ret = 0;
break;
#endif /* CONFIG_PMIC_STPMIC1 */
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);
if (ret != 4)
ret = -EINVAL;
else
ret = 0;
break;
#ifdef CONFIG_PMIC_STPMIC1
case STM32MP_NVM_BANK:
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stpmic1_nvm),
&dev);
if (ret)
return ret;
ret = misc_write(dev, -word, &val, 1);
if (ret != 1)
ret = -EINVAL;
else
ret = 0;
break;
#endif /* CONFIG_PMIC_STPMIC1 */
default:
printf("stm32mp %s: wrong value for bank %i\n",
__func__, bank);
ret = -EINVAL;
break;
}
return ret;
}