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