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/*
* This file is part of the coreboot project.
*
* Copyright 2017 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <assert.h>
#include <device/device.h>
#include <intelblocks/gspi.h>
#include <intelblocks/spi.h>
#include <soc/iomap.h>
#include <soc/pci_devs.h>
#include "chip.h"
const struct gspi_cfg *gspi_get_soc_cfg(void)
{
DEVTREE_CONST struct soc_intel_cannonlake_config *config;
int devfn = SA_DEVFN_ROOT;
DEVTREE_CONST struct device *dev = dev_find_slot(0, devfn);
if (!dev || !dev->chip_info) {
printk(BIOS_ERR, "%s: Could not find SoC devicetree config!\n",
__func__);
return NULL;
}
config = dev->chip_info;
return &config->gspi[0];
}
uintptr_t gspi_get_soc_early_base(void)
{
return EARLY_GSPI_BASE_ADDRESS;
}
/*
* SPI Bus 0 is Fast SPI and GSPI starts from SPI bus # 1 onwards. Thus, adjust
* the bus # accordingly when referring to SPI / GSPI bus numbers.
*/
#define GSPI_TO_SPI_BUS(x) ((x) + 1)
#define SPI_TO_GSPI_BUS(x) ((x) - 1)
int gspi_soc_spi_to_gspi_bus(unsigned int spi_bus, unsigned int *gspi_bus)
{
if (spi_bus == 0)
return -1;
*gspi_bus = SPI_TO_GSPI_BUS(spi_bus);
if (*gspi_bus >= CONFIG_SOC_INTEL_COMMON_BLOCK_GSPI_MAX)
return -1;
return 0;
}
int gspi_soc_bus_to_devfn(unsigned int gspi_bus)
{
if (gspi_bus >= CONFIG_SOC_INTEL_COMMON_BLOCK_GSPI_MAX)
return -1;
return spi_soc_bus_to_devfn(GSPI_TO_SPI_BUS(gspi_bus));
}
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