| // 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; |
| 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); |
| void logic_outb(u8 value, unsigned long addr); |
| void logic_outw(u16 value, unsigned long addr); |
| void logic_outl(u32 value, 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(struct fwnode_handle *fwnode); |
| unsigned long logic_pio_trans_hwaddr(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 */ |