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>lime2-spi
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19f589923a
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c3600e1f92
@ -0,0 +1,116 @@ |
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// 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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