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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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