spi.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-or-later */
 
/*
 * This file is created based on Intel Tiger Lake Processor PCH Datasheet
 * Document number: 575857
 * Chapter number: 7
 */
 
#include <intelblocks/spi.h>
#include <intelblocks/fast_spi.h>
#include <soc/pci_devs.h>
 
#define PSF_SPI_DESTINATION_ID_H        0x23b0
#define PSF_SPI_DESTINATION_ID          0x23a8
 
int spi_soc_devfn_to_bus(unsigned int devfn)
{
        switch (devfn) {
        case PCH_DEVFN_SPI:
                return 0;
        case PCH_DEVFN_GSPI0:
                return 1;
        case PCH_DEVFN_GSPI1:
                return 2;
        case PCH_DEVFN_GSPI2:
                return 3;
        }
        return -1;
}
 
uint32_t soc_get_spi_psf_destination_id(void)
{
        if (CONFIG(SOC_INTEL_TIGERLAKE_PCH_H))
                return PSF_SPI_DESTINATION_ID_H;
        return PSF_SPI_DESTINATION_ID;
}