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 | u16 logic_inw(unsigned long addr); |
43 | u32 logic_inl(unsigned long addr); |
44 | void logic_outb(u8 value, unsigned long addr); |
45 | void logic_outw(u16 value, unsigned long addr); |
46 | void logic_outl(u32 value, unsigned long addr); |
47 | void logic_insb(unsigned long addr, void *buffer, unsigned int count); |
48 | void logic_insl(unsigned long addr, void *buffer, unsigned int count); |
49 | void logic_insw(unsigned long addr, void *buffer, unsigned int count); |
50 | void logic_outsb(unsigned long addr, const void *buffer, unsigned int count); |
51 | void logic_outsw(unsigned long addr, const void *buffer, unsigned int count); |
52 | void logic_outsl(unsigned long addr, const void *buffer, unsigned int count); |
53 | |
54 | #ifndef inb |
55 | #define inb logic_inb |
56 | #endif |
57 | |
58 | #ifndef inw |
59 | #define inw logic_inw |
60 | #endif |
61 | |
62 | #ifndef inl |
63 | #define inl logic_inl |
64 | #endif |
65 | |
66 | #ifndef outb |
67 | #define outb logic_outb |
68 | #endif |
69 | |
70 | #ifndef outw |
71 | #define outw logic_outw |
72 | #endif |
73 | |
74 | #ifndef outl |
75 | #define outl logic_outl |
76 | #endif |
77 | |
78 | #ifndef insb |
79 | #define insb logic_insb |
80 | #endif |
81 | |
82 | #ifndef insw |
83 | #define insw logic_insw |
84 | #endif |
85 | |
86 | #ifndef insl |
87 | #define insl logic_insl |
88 | #endif |
89 | |
90 | #ifndef outsb |
91 | #define outsb logic_outsb |
92 | #endif |
93 | |
94 | #ifndef outsw |
95 | #define outsw logic_outsw |
96 | #endif |
97 | |
98 | #ifndef outsl |
99 | #define outsl logic_outsl |
100 | #endif |
101 | |
102 | /* |
103 | * We reserve 0x4000 bytes for Indirect IO as so far this library is only |
104 | * used by the HiSilicon LPC Host. If needed, we can reserve a wider IO |
105 | * area by redefining the macro below. |
106 | */ |
107 | #define PIO_INDIRECT_SIZE 0x4000 |
108 | #else |
109 | #define PIO_INDIRECT_SIZE 0 |
110 | #endif /* CONFIG_INDIRECT_PIO */ |
111 | #define MMIO_UPPER_LIMIT (IO_SPACE_LIMIT - PIO_INDIRECT_SIZE) |
112 | |
113 | struct logic_pio_hwaddr *find_io_range_by_fwnode(struct fwnode_handle *fwnode); |
114 | unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode, |
115 | resource_size_t hw_addr, resource_size_t size); |
116 | int logic_pio_register_range(struct logic_pio_hwaddr *newrange); |
117 | void logic_pio_unregister_range(struct logic_pio_hwaddr *range); |
118 | resource_size_t logic_pio_to_hwaddr(unsigned long pio); |
119 | unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr); |
120 | |
121 | #endif /* __LINUX_LOGIC_PIO_H */ |
122 | |