| 90a4bbef |
1 | /* |
| 2 | * Copyright (C) 2017 Hisilicon Limited, All Rights Reserved. |
| 3 | * Author: Zhichang Yuan <yuanzhichang@hisilicon.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #ifndef __LINUX_LIBIO_H |
| 19 | #define __LINUX_LIBIO_H |
| 20 | |
| 21 | #ifdef __KERNEL__ |
| 22 | |
| 23 | #include <linux/fwnode.h> |
| 24 | |
| 25 | /* This is compatible to PCI MMIO. */ |
| 26 | #define IO_CPU_MMIO 0x01 |
| 27 | /* All hosts where there are no CPU addr */ |
| 28 | #define IO_HOST_INDIRECT 0x02 |
| 29 | |
| 30 | struct libio_range { |
| 31 | struct list_head list; |
| 32 | struct fwnode_handle *node; |
| 33 | resource_size_t size; /* range size populated */ |
| 34 | resource_size_t io_start; /* logical pio start. inclusive */ |
| 35 | resource_size_t hw_start; |
| 36 | unsigned long flags; |
| 37 | void *devpara; /* private parameter of the host device */ |
| 38 | struct libio_ops *ops; /* ops operating on this node */ |
| 39 | }; |
| 40 | |
| 41 | struct libio_ops { |
| 42 | u32 (*pfin)(void *devobj, unsigned long ptaddr, size_t dlen); |
| 43 | void (*pfout)(void *devobj, unsigned long ptaddr, u32 outval, |
| 44 | size_t dlen); |
| 45 | u32 (*pfins)(void *devobj, unsigned long ptaddr, void *inbuf, |
| 46 | size_t dlen, unsigned int count); |
| 47 | void (*pfouts)(void *devobj, unsigned long ptaddr, |
| 48 | const void *outbuf, size_t dlen, unsigned int count); |
| 49 | }; |
| 50 | |
| 51 | extern u8 libio_inb(unsigned long addr); |
| 52 | extern void libio_outb(u8 value, unsigned long addr); |
| 53 | extern void libio_outw(u16 value, unsigned long addr); |
| 54 | extern void libio_outl(u32 value, unsigned long addr); |
| 55 | extern u16 libio_inw(unsigned long addr); |
| 56 | extern u32 libio_inl(unsigned long addr); |
| 57 | extern void libio_outb(u8 value, unsigned long addr); |
| 58 | extern void libio_outw(u16 value, unsigned long addr); |
| 59 | extern void libio_outl(u32 value, unsigned long addr); |
| 60 | extern void libio_insb(unsigned long addr, void *buffer, unsigned int count); |
| 61 | extern void libio_insl(unsigned long addr, void *buffer, unsigned int count); |
| 62 | extern void libio_insw(unsigned long addr, void *buffer, unsigned int count); |
| 63 | extern void libio_outsb(unsigned long addr, const void *buffer, |
| 64 | unsigned int count); |
| 65 | extern void libio_outsw(unsigned long addr, const void *buffer, |
| 66 | unsigned int count); |
| 67 | extern void libio_outsl(unsigned long addr, const void *buffer, |
| 68 | unsigned int count); |
| 69 | #ifdef CONFIG_LIBIO |
| 70 | extern struct libio_range |
| 71 | *find_io_range_from_fwnode(struct fwnode_handle *fwnode); |
| 72 | extern unsigned long libio_translate_hwaddr(struct fwnode_handle *fwnode, |
| 73 | resource_size_t hw_addr); |
| 74 | #else |
| 75 | static inline struct libio_range |
| 76 | *find_io_range_from_fwnode(struct fwnode_handle *fwnode) |
| 77 | { |
| 78 | return NULL; |
| 79 | } |
| 80 | |
| 81 | static inline unsigned long libio_translate_hwaddr(struct fwnode_handle *fwnode, |
| 82 | resource_size_t hw_addr) |
| 83 | { |
| 84 | return -1; |
| 85 | } |
| 86 | #endif |
| 87 | |
| 88 | extern struct libio_range *register_libio_range(struct libio_range *newrange); |
| 89 | extern resource_size_t libio_to_hwaddr(unsigned long pio); |
| 90 | |
| 91 | extern unsigned long libio_translate_cpuaddr(resource_size_t hw_addr); |
| 92 | |
| 93 | #endif /* __KERNEL__ */ |
| 94 | #endif /* __LINUX_LIBIO_H */ |
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