From: Aaron Williams awilliams@marvell.com
Add header to handle Octeon fuse access.
Signed-off-by: Aaron Williams awilliams@marvell.com Signed-off-by: Stefan Roese sr@denx.de ---
.../mips/mach-octeon/include/mach/cvmx-fuse.h | 71 +++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 arch/mips/mach-octeon/include/mach/cvmx-fuse.h
diff --git a/arch/mips/mach-octeon/include/mach/cvmx-fuse.h b/arch/mips/mach-octeon/include/mach/cvmx-fuse.h new file mode 100644 index 0000000000..a06a1326cb --- /dev/null +++ b/arch/mips/mach-octeon/include/mach/cvmx-fuse.h @@ -0,0 +1,71 @@ +/* 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__ */