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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 | ||
c838920e | 23 | #include <linux/device.h> |
90a4bbef | 24 | #include <linux/fwnode.h> |
25 | ||
26 | /* This is compatible to PCI MMIO. */ | |
27 | #define IO_CPU_MMIO 0x01 | |
28 | /* All hosts where there are no CPU addr */ | |
29 | #define IO_HOST_INDIRECT 0x02 | |
30 | ||
31 | struct libio_range { | |
32 | struct list_head list; | |
33 | struct fwnode_handle *node; | |
34 | resource_size_t size; /* range size populated */ | |
35 | resource_size_t io_start; /* logical pio start. inclusive */ | |
36 | resource_size_t hw_start; | |
37 | unsigned long flags; | |
38 | void *devpara; /* private parameter of the host device */ | |
39 | struct libio_ops *ops; /* ops operating on this node */ | |
40 | }; | |
41 | ||
42 | struct libio_ops { | |
43 | u32 (*pfin)(void *devobj, unsigned long ptaddr, size_t dlen); | |
44 | void (*pfout)(void *devobj, unsigned long ptaddr, u32 outval, | |
45 | size_t dlen); | |
46 | u32 (*pfins)(void *devobj, unsigned long ptaddr, void *inbuf, | |
47 | size_t dlen, unsigned int count); | |
48 | void (*pfouts)(void *devobj, unsigned long ptaddr, | |
49 | const void *outbuf, size_t dlen, unsigned int count); | |
50 | }; | |
51 | ||
52 | extern u8 libio_inb(unsigned long addr); | |
53 | extern void libio_outb(u8 value, unsigned long addr); | |
54 | extern void libio_outw(u16 value, unsigned long addr); | |
55 | extern void libio_outl(u32 value, unsigned long addr); | |
56 | extern u16 libio_inw(unsigned long addr); | |
57 | extern u32 libio_inl(unsigned long addr); | |
58 | extern void libio_outb(u8 value, unsigned long addr); | |
59 | extern void libio_outw(u16 value, unsigned long addr); | |
60 | extern void libio_outl(u32 value, unsigned long addr); | |
61 | extern void libio_insb(unsigned long addr, void *buffer, unsigned int count); | |
62 | extern void libio_insl(unsigned long addr, void *buffer, unsigned int count); | |
63 | extern void libio_insw(unsigned long addr, void *buffer, unsigned int count); | |
64 | extern void libio_outsb(unsigned long addr, const void *buffer, | |
65 | unsigned int count); | |
66 | extern void libio_outsw(unsigned long addr, const void *buffer, | |
67 | unsigned int count); | |
68 | extern void libio_outsl(unsigned long addr, const void *buffer, | |
69 | unsigned int count); | |
70 | #ifdef CONFIG_LIBIO | |
71 | extern struct libio_range | |
72 | *find_io_range_from_fwnode(struct fwnode_handle *fwnode); | |
73 | extern unsigned long libio_translate_hwaddr(struct fwnode_handle *fwnode, | |
74 | resource_size_t hw_addr); | |
369b6172 | 75 | extern struct libio_range *register_libio_range(struct libio_range *newrange); |
76 | extern resource_size_t libio_to_hwaddr(unsigned long pio); | |
77 | ||
78 | extern unsigned long libio_translate_cpuaddr(resource_size_t hw_addr); | |
90a4bbef | 79 | #else |
80 | static inline struct libio_range | |
81 | *find_io_range_from_fwnode(struct fwnode_handle *fwnode) | |
82 | { | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | static inline unsigned long libio_translate_hwaddr(struct fwnode_handle *fwnode, | |
87 | resource_size_t hw_addr) | |
88 | { | |
89 | return -1; | |
90 | } | |
90a4bbef | 91 | |
369b6172 | 92 | static inline struct libio_range |
93 | *register_libio_range(struct libio_range *newrange) | |
94 | { | |
95 | return NULL; | |
96 | } | |
90a4bbef | 97 | |
369b6172 | 98 | static inline resource_size_t libio_to_hwaddr(unsigned long pio) |
99 | { | |
100 | return -1; | |
101 | } | |
102 | ||
103 | static inline unsigned long libio_translate_cpuaddr(resource_size_t hw_addr) | |
104 | { | |
105 | return -1; | |
106 | } | |
107 | #endif | |
90a4bbef | 108 | |
c838920e | 109 | #ifdef CONFIG_ACPI |
110 | extern int acpi_set_libio_resource(struct device *child, | |
111 | struct device *hostdev); | |
112 | #else | |
113 | static inline int acpi_set_libio_resource(struct device *child, | |
114 | struct device *hostdev) | |
115 | { | |
116 | return -EFAULT; | |
117 | } | |
118 | #endif /* CONFIG_ACPI */ | |
90a4bbef | 119 | #endif /* __KERNEL__ */ |
120 | #endif /* __LINUX_LIBIO_H */ |