mirror of
https://github.com/brain-hackers/u-boot-brain
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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>
117 lines
2.1 KiB
C
117 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
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*/
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#include <common.h>
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#include <command.h>
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#include <misc.h>
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#include <errno.h>
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#include <dm/device.h>
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#include <dm/uclass.h>
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#define STM32MP_OTP_BANK 0
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/*
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* The 'fuse' command API
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*/
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int fuse_read(u32 bank, u32 word, u32 *val)
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{
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int ret = 0;
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struct udevice *dev;
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switch (bank) {
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case STM32MP_OTP_BANK:
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_GET_DRIVER(stm32mp_bsec),
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&dev);
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if (ret)
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return ret;
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ret = misc_read(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
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val, 4);
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break;
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default:
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printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
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ret = -EINVAL;
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break;
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}
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return ret;
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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 udevice *dev;
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int ret;
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switch (bank) {
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case STM32MP_OTP_BANK:
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_GET_DRIVER(stm32mp_bsec),
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&dev);
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if (ret)
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return ret;
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ret = misc_write(dev, word * 4 + STM32_BSEC_OTP_OFFSET,
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&val, 4);
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break;
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default:
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printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
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ret = -EINVAL;
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break;
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}
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return ret;
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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 udevice *dev;
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int ret;
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switch (bank) {
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case STM32MP_OTP_BANK:
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_GET_DRIVER(stm32mp_bsec),
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&dev);
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if (ret)
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return ret;
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ret = misc_read(dev, word * 4 + STM32_BSEC_OTP_OFFSET, val, 4);
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break;
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default:
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printf("stm32mp %s: wrong value for bank %i\n", __func__, bank);
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ret = -EINVAL;
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break;
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}
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return ret;
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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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struct udevice *dev;
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int ret;
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switch (bank) {
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case STM32MP_OTP_BANK:
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_GET_DRIVER(stm32mp_bsec),
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&dev);
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if (ret)
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return ret;
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ret = misc_write(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET,
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&val, 4);
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break;
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default:
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printf("stm32mp %s: wrong value for bank %i\n",
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__func__, bank);
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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