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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#ifndef __AMDBLOCKS_ESPI_H__
#define __AMDBLOCKS_ESPI_H__
#include <stdint.h>
#include <stddef.h>
/* eSPI MMIO base lives at an offset of 0x10000 from the address in SPI BAR. */
#define ESPI_OFFSET_FROM_BAR 0x10000
#define ESPI_DECODE 0x40
#define ESPI_DECODE_MMIO_RANGE_EN(range) (1 << (((range) & 3) + 12))
#define ESPI_DECODE_IO_RANGE_EN(range) (1 << (((range) & 3) + 8))
#define ESPI_DECODE_IO_0x80_EN (1 << 2)
#define ESPI_DECODE_IO_0X60_0X64_EN (1 << 1)
#define ESPI_DECODE_IO_0X2E_0X2F_EN (1 << 0)
#define ESPI_IO_RANGE_BASE(range) (0x44 + ((range) & 3) * 2)
#define ESPI_IO_RANGE_SIZE(range) (0x4c + ((range) & 3))
#define ESPI_MMIO_RANGE_BASE(range) (0x50 + ((range) & 3) * 4)
#define ESPI_MMIO_RANGE_SIZE(range) (0x60 + ((range) & 3) * 2)
#define ESPI_GENERIC_IO_WIN_COUNT 4
#define ESPI_GENERIC_IO_MAX_WIN_SIZE 0x100
#define ESPI_GENERIC_MMIO_WIN_COUNT 4
#define ESPI_GENERIC_MMIO_MAX_WIN_SIZE 0x10000
struct espi_config {
/* Bitmap for standard IO decodes. Use ESPI_DECODE_IO_* above. */
uint32_t std_io_decode_bitmap;
struct {
uint16_t base;
size_t size;
} generic_io_range[ESPI_GENERIC_IO_WIN_COUNT];
};
/*
* Open I/O window using the provided base and size.
* Return value: 0 = success, -1 = error.
*/
int espi_open_io_window(uint16_t base, size_t size);
/*
* Open MMIO window using the provided base and size.
* Return value: 0 = success, -1 = error.
*/
int espi_open_mmio_window(uint32_t base, size_t size);
/*
* Configure generic and standard I/O decode windows using the espi_config structure settings
* provided by mainboard in device tree.
*/
void espi_configure_decodes(void);
/*
* In cases where eSPI BAR is statically provided by SoC, use that BAR instead of reading
* SPIBASE. This is required for cases where verstage runs on PSP.
*/
void espi_update_static_bar(uintptr_t bar);
#endif /* __AMDBLOCKS_ESPI_H__ */
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