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1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017 HiSilicon Limited, All Rights Reserved.
4 * Author: Gabriele Paoloni <gabriele.paoloni@huawei.com>
5 * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
8 #ifndef __LINUX_LOGIC_PIO_H
9 #define __LINUX_LOGIC_PIO_H
11 #include <linux/fwnode.h>
14 LOGIC_PIO_INDIRECT
, /* Indirect IO flag */
15 LOGIC_PIO_CPU_MMIO
, /* Memory-mapped IO flag */
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 */
27 const struct logic_pio_host_ops
*ops
;
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
,
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
);
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
);
70 #define outb logic_outb
74 #define outw logic_outw
78 #define outl logic_outl
82 #define insb logic_insb
86 #define insw logic_insw
90 #define insl logic_insl
94 #define outsb logic_outsb
98 #define outsw logic_outsw
102 #define outsl logic_outsl
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.
110 #define PIO_INDIRECT_SIZE 0x4000
112 #define PIO_INDIRECT_SIZE 0
113 #endif /* CONFIG_INDIRECT_PIO */
114 #define MMIO_UPPER_LIMIT (IO_SPACE_LIMIT - PIO_INDIRECT_SIZE)
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
);
120 void logic_pio_unregister_range(struct logic_pio_hwaddr
*range
);
121 resource_size_t
logic_pio_to_hwaddr(unsigned long pio
);
122 unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr
);
124 #endif /* __LINUX_LOGIC_PIO_H */