| /* 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__ */ |