mirror of
https://github.com/AsahiLinux/u-boot
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72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Marvell International Ltd.
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*/
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#ifndef __CVMX_FUSE_H__
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#define __CVMX_FUSE_H__
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/**
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* Read a byte of fuse data
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* @param node node to read from
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* @param byte_addr address to read
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*
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* @return fuse value: 0 or 1
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*/
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static inline u8 cvmx_fuse_read_byte_node(u8 node, int byte_addr)
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{
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u64 val;
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val = FIELD_PREP(MIO_FUS_RCMD_ADDR, byte_addr) | MIO_FUS_RCMD_PEND;
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csr_wr_node(node, CVMX_MIO_FUS_RCMD, val);
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do {
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val = csr_rd_node(node, CVMX_MIO_FUS_RCMD);
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} while (val & MIO_FUS_RCMD_PEND);
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return FIELD_GET(MIO_FUS_RCMD_DAT, val);
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}
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/**
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* Read a byte of fuse data
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* @param byte_addr address to read
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*
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* @return fuse value: 0 or 1
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*/
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static inline u8 cvmx_fuse_read_byte(int byte_addr)
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{
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return cvmx_fuse_read_byte_node(0, byte_addr);
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}
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/**
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* Read a single fuse bit
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*
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* @param node Node number
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* @param fuse Fuse number (0-1024)
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*
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* @return fuse value: 0 or 1
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*/
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static inline int cvmx_fuse_read_node(u8 node, int fuse)
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{
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return (cvmx_fuse_read_byte_node(node, fuse >> 3) >> (fuse & 0x7)) & 1;
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}
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/**
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* Read a single fuse bit
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*
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* @param fuse Fuse number (0-1024)
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*
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* @return fuse value: 0 or 1
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*/
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static inline int cvmx_fuse_read(int fuse)
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{
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return cvmx_fuse_read_node(0, fuse);
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}
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static inline int cvmx_octeon_fuse_locked(void)
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{
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return cvmx_fuse_read(123);
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}
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#endif /* __CVMX_FUSE_H__ */
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