mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 10:43:06 +00:00
99b937e568
Add header to handle Octeon fuse access. Signed-off-by: Aaron Williams <awilliams@marvell.com> Signed-off-by: Stefan Roese <sr@denx.de>
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/* 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__ */
|