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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 HiSilicon Limited, All Rights Reserved.
* Author: Gabriele Paoloni <gabriele.paoloni@huawei.com>
* Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
*/
#ifndef __LINUX_LOGIC_PIO_H
#define __LINUX_LOGIC_PIO_H
#include <linux/fwnode.h>
enum {
LOGIC_PIO_INDIRECT, /* Indirect IO flag */
LOGIC_PIO_CPU_MMIO, /* Memory-mapped IO flag */
};
struct logic_pio_hwaddr {
struct list_head list;
const struct fwnode_handle *fwnode;
resource_size_t hw_start;
resource_size_t io_start;
resource_size_t size; /* range size populated */
unsigned long flags;
void *hostdata;
const struct logic_pio_host_ops *ops;
};
struct logic_pio_host_ops {
u32 (*in)(void *hostdata, unsigned long addr, size_t dwidth);
void (*out)(void *hostdata, unsigned long addr, u32 val,
size_t dwidth);
u32 (*ins)(void *hostdata, unsigned long addr, void *buffer,
size_t dwidth, unsigned int count);
void (*outs)(void *hostdata, unsigned long addr, const void *buffer,
size_t dwidth, unsigned int count);
};
#ifdef CONFIG_INDIRECT_PIO
u8 logic_inb(unsigned long addr);
u16 logic_inw(unsigned long addr);
u32 logic_inl(unsigned long addr);
void logic_outb(u8 value, unsigned long addr);
void logic_outw(u16 value, unsigned long addr);
void logic_outl(u32 value, unsigned long addr);
void logic_insb(unsigned long addr, void *buffer, unsigned int count);
void logic_insl(unsigned long addr, void *buffer, unsigned int count);
void logic_insw(unsigned long addr, void *buffer, unsigned int count);
void logic_outsb(unsigned long addr, const void *buffer, unsigned int count);
void logic_outsw(unsigned long addr, const void *buffer, unsigned int count);
void logic_outsl(unsigned long addr, const void *buffer, unsigned int count);
#ifndef inb
#define inb logic_inb
#endif
#ifndef inw
#define inw logic_inw
#endif
#ifndef inl
#define inl logic_inl
#endif
#ifndef outb
#define outb logic_outb
#endif
#ifndef outw
#define outw logic_outw
#endif
#ifndef outl
#define outl logic_outl
#endif
#ifndef insb
#define insb logic_insb
#endif
#ifndef insw
#define insw logic_insw
#endif
#ifndef insl
#define insl logic_insl
#endif
#ifndef outsb
#define outsb logic_outsb
#endif
#ifndef outsw
#define outsw logic_outsw
#endif
#ifndef outsl
#define outsl logic_outsl
#endif
/*
* We reserve 0x4000 bytes for Indirect IO as so far this library is only
* used by the HiSilicon LPC Host. If needed, we can reserve a wider IO
* area by redefining the macro below.
*/
#define PIO_INDIRECT_SIZE 0x4000
#else
#define PIO_INDIRECT_SIZE 0
#endif /* CONFIG_INDIRECT_PIO */
#define MMIO_UPPER_LIMIT (IO_SPACE_LIMIT - PIO_INDIRECT_SIZE)
struct logic_pio_hwaddr *find_io_range_by_fwnode(const struct fwnode_handle *fwnode);
unsigned long logic_pio_trans_hwaddr(const struct fwnode_handle *fwnode,
resource_size_t hw_addr, resource_size_t size);
int logic_pio_register_range(struct logic_pio_hwaddr *newrange);
void logic_pio_unregister_range(struct logic_pio_hwaddr *range);
resource_size_t logic_pio_to_hwaddr(unsigned long pio);
unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr);
#endif /* __LINUX_LOGIC_PIO_H */
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