69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
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/*
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* BCM2835 One-Time Programmable (OTP) Memory
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*
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* Copyright (c) 2024 Rayhan Faizel <rayhan.faizel@gmail.com>
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*
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* SPDX-License-Identifier: MIT
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*/
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#ifndef BCM2835_OTP_H
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#define BCM2835_OTP_H
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#include "hw/sysbus.h"
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#include "qom/object.h"
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#define TYPE_BCM2835_OTP "bcm2835-otp"
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OBJECT_DECLARE_SIMPLE_TYPE(BCM2835OTPState, BCM2835_OTP)
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#define BCM2835_OTP_ROW_COUNT 66
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/* https://elinux.org/BCM2835_registers#OTP */
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#define BCM2835_OTP_BOOTMODE_REG 0x00
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#define BCM2835_OTP_CONFIG_REG 0x04
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#define BCM2835_OTP_CTRL_LO_REG 0x08
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#define BCM2835_OTP_CTRL_HI_REG 0x0c
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#define BCM2835_OTP_STATUS_REG 0x10
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#define BCM2835_OTP_BITSEL_REG 0x14
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#define BCM2835_OTP_DATA_REG 0x18
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#define BCM2835_OTP_ADDR_REG 0x1c
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#define BCM2835_OTP_WRITE_DATA_READ_REG 0x20
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#define BCM2835_OTP_INIT_STATUS_REG 0x24
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/* -- Row 32: Undocumented -- */
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#define BCM2835_OTP_ROW_32 32
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/* Lock OTP Programming (Customer OTP and private key) */
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#define BCM2835_OTP_ROW_32_LOCK BIT(6)
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/* -- Row 36-43: Customer OTP -- */
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#define BCM2835_OTP_CUSTOMER_OTP 36
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#define BCM2835_OTP_CUSTOMER_OTP_LEN 8
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/* Magic numbers to lock programming of customer OTP and private key */
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#define BCM2835_OTP_LOCK_NUM1 0xffffffff
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#define BCM2835_OTP_LOCK_NUM2 0xaffe0000
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/* -- Row 56-63: Device-specific private key -- */
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#define BCM2835_OTP_PRIVATE_KEY 56
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#define BCM2835_OTP_PRIVATE_KEY_LEN 8
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struct BCM2835OTPState {
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/* <private> */
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SysBusDevice parent_obj;
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/* <public> */
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MemoryRegion iomem;
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uint32_t otp_rows[BCM2835_OTP_ROW_COUNT];
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};
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uint32_t bcm2835_otp_get_row(BCM2835OTPState *s, unsigned int row);
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void bcm2835_otp_set_row(BCM2835OTPState *s, unsigned int row, uint32_t value);
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#endif
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