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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2017 Intel Corporation.
*/
#ifndef ASM_FAST_SPI_H
#define ASM_FAST_SPI_H
#include <pci.h>
#include <linux/bitops.h>
/* Register offsets from the MMIO region base (PCI_BASE_ADDRESS_0) */
struct fast_spi_regs {
u32 bfp;
u32 hsfsts_ctl;
u32 faddr;
u32 dlock;
u32 fdata[0x10];
u32 fracc;
u32 freg[12];
u32 fpr[5];
u32 gpr0;
u32 spare2;
u32 sts_ctl;
u16 preop;
u16 optype;
u8 opmenu[8];
u32 spare3;
u32 fdoc;
u32 fdod;
u32 spare4;
u32 afc;
u32 vscc[2];
u32 ptinx;
u32 ptdata;
};
check_member(fast_spi_regs, ptdata, 0xd0);
/* Bit definitions for BFPREG (0x00) register */
#define SPIBAR_BFPREG_PRB_MASK 0x7fff
#define SPIBAR_BFPREG_PRL_SHIFT 16
#define SPIBAR_BFPREG_PRL_MASK (0x7fff << SPIBAR_BFPREG_PRL_SHIFT)
/* PCI configuration registers */
#define SPIBAR_BIOS_CONTROL 0xdc
#define SPIBAR_BIOS_CONTROL_WPD BIT(0)
#define SPIBAR_BIOS_CONTROL_LOCK_ENABLE BIT(1)
#define SPIBAR_BIOS_CONTROL_CACHE_DISABLE BIT(2)
#define SPIBAR_BIOS_CONTROL_PREFETCH_ENABLE BIT(3)
#define SPIBAR_BIOS_CONTROL_EISS BIT(5)
#define SPIBAR_BIOS_CONTROL_BILD BIT(7)
/**
* fast_spi_get_bios_mmap() - Get memory map for SPI flash
*
* @pdev: PCI device to use (this is the Fast SPI device)
* @map_basep: Returns base memory address for mapped SPI
* @map_sizep: Returns size of mapped SPI
* @offsetp: Returns start offset of SPI flash where the map works
* correctly (offsets before this are not visible)
* Return: 0 (always)
*/
int fast_spi_get_bios_mmap(pci_dev_t pdev, ulong *map_basep, uint *map_sizep,
uint *offsetp);
/**
* fast_spi_get_bios_mmap_regs() - Get memory map for SPI flash given regs
*
* @regs: SPI registers to use
* @map_basep: Returns base memory address for mapped SPI
* @map_sizep: Returns size of mapped SPI
* @offsetp: Returns start offset of SPI flash where the map works
* correctly (offsets before this are not visible)
* Return: 0 (always)
*/
int fast_spi_get_bios_mmap_regs(struct fast_spi_regs *regs, ulong *map_basep,
uint *map_sizep, uint *offsetp);
/**
* fast_spi_early_init() - Set up a BAR to use SPI early in U-Boot
*
* @pdev: PCI device to use (this is the Fast SPI device)
* @mmio_base: MMIO base to use to access registers
*/
int fast_spi_early_init(pci_dev_t pdev, ulong mmio_base);
#endif /* ASM_FAST_SPI_H */
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