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031e3601 ZY |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* | |
3 | * Copyright (C) 2017 HiSilicon Limited, All Rights Reserved. | |
4 | * Author: Gabriele Paoloni <gabriele.paoloni@huawei.com> | |
5 | * Author: Zhichang Yuan <yuanzhichang@hisilicon.com> | |
6 | */ | |
7 | ||
8 | #ifndef __LINUX_LOGIC_PIO_H | |
9 | #define __LINUX_LOGIC_PIO_H | |
10 | ||
11 | #include <linux/fwnode.h> | |
12 | ||
13 | enum { | |
14 | LOGIC_PIO_INDIRECT, /* Indirect IO flag */ | |
15 | LOGIC_PIO_CPU_MMIO, /* Memory-mapped IO flag */ | |
16 | }; | |
17 | ||
18 | struct logic_pio_hwaddr { | |
19 | struct list_head list; | |
20 | struct fwnode_handle *fwnode; | |
21 | resource_size_t hw_start; | |
22 | resource_size_t io_start; | |
23 | resource_size_t size; /* range size populated */ | |
24 | unsigned long flags; | |
25 | ||
26 | void *hostdata; | |
27 | const struct logic_pio_host_ops *ops; | |
28 | }; | |
29 | ||
30 | struct logic_pio_host_ops { | |
31 | u32 (*in)(void *hostdata, unsigned long addr, size_t dwidth); | |
32 | void (*out)(void *hostdata, unsigned long addr, u32 val, | |
33 | size_t dwidth); | |
34 | u32 (*ins)(void *hostdata, unsigned long addr, void *buffer, | |
35 | size_t dwidth, unsigned int count); | |
36 | void (*outs)(void *hostdata, unsigned long addr, const void *buffer, | |
37 | size_t dwidth, unsigned int count); | |
38 | }; | |
39 | ||
40 | #ifdef CONFIG_INDIRECT_PIO | |
41 | u8 logic_inb(unsigned long addr); | |
42 | void logic_outb(u8 value, unsigned long addr); | |
43 | void logic_outw(u16 value, unsigned long addr); | |
44 | void logic_outl(u32 value, unsigned long addr); | |
45 | u16 logic_inw(unsigned long addr); | |
46 | u32 logic_inl(unsigned long addr); | |
47 | void logic_outb(u8 value, unsigned long addr); | |
48 | void logic_outw(u16 value, unsigned long addr); | |
49 | void logic_outl(u32 value, unsigned long addr); | |
50 | void logic_insb(unsigned long addr, void *buffer, unsigned int count); | |
51 | void logic_insl(unsigned long addr, void *buffer, unsigned int count); | |
52 | void logic_insw(unsigned long addr, void *buffer, unsigned int count); | |
53 | void logic_outsb(unsigned long addr, const void *buffer, unsigned int count); | |
54 | void logic_outsw(unsigned long addr, const void *buffer, unsigned int count); | |
55 | void logic_outsl(unsigned long addr, const void *buffer, unsigned int count); | |
56 | ||
57 | #ifndef inb | |
58 | #define inb logic_inb | |
59 | #endif | |
60 | ||
61 | #ifndef inw | |
62 | #define inw logic_inw | |
63 | #endif | |
64 | ||
65 | #ifndef inl | |
66 | #define inl logic_inl | |
67 | #endif | |
68 | ||
69 | #ifndef outb | |
70 | #define outb logic_outb | |
71 | #endif | |
72 | ||
73 | #ifndef outw | |
74 | #define outw logic_outw | |
75 | #endif | |
76 | ||
77 | #ifndef outl | |
78 | #define outl logic_outl | |
79 | #endif | |
80 | ||
81 | #ifndef insb | |
82 | #define insb logic_insb | |
83 | #endif | |
84 | ||
85 | #ifndef insw | |
86 | #define insw logic_insw | |
87 | #endif | |
88 | ||
89 | #ifndef insl | |
90 | #define insl logic_insl | |
91 | #endif | |
92 | ||
93 | #ifndef outsb | |
94 | #define outsb logic_outsb | |
95 | #endif | |
96 | ||
97 | #ifndef outsw | |
98 | #define outsw logic_outsw | |
99 | #endif | |
100 | ||
101 | #ifndef outsl | |
102 | #define outsl logic_outsl | |
103 | #endif | |
104 | ||
105 | /* | |
106 | * We reserve 0x4000 bytes for Indirect IO as so far this library is only | |
107 | * used by the HiSilicon LPC Host. If needed, we can reserve a wider IO | |
108 | * area by redefining the macro below. | |
109 | */ | |
110 | #define PIO_INDIRECT_SIZE 0x4000 | |
031e3601 | 111 | #else |
b8104fda | 112 | #define PIO_INDIRECT_SIZE 0 |
031e3601 | 113 | #endif /* CONFIG_INDIRECT_PIO */ |
b8104fda | 114 | #define MMIO_UPPER_LIMIT (IO_SPACE_LIMIT - PIO_INDIRECT_SIZE) |
031e3601 ZY |
115 | |
116 | struct logic_pio_hwaddr *find_io_range_by_fwnode(struct fwnode_handle *fwnode); | |
117 | unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode, | |
118 | resource_size_t hw_addr, resource_size_t size); | |
119 | int logic_pio_register_range(struct logic_pio_hwaddr *newrange); | |
b884e2de | 120 | void logic_pio_unregister_range(struct logic_pio_hwaddr *range); |
031e3601 ZY |
121 | resource_size_t logic_pio_to_hwaddr(unsigned long pio); |
122 | unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr); | |
123 | ||
124 | #endif /* __LINUX_LOGIC_PIO_H */ |