dimmSpd.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/pci_def.h>
#include <device/device.h>
#include <OEM.h>
 
/* warning: Porting.h includes an open #pragma pack(1) */
#include <Porting.h>
#include <AGESA.h>
#include "chip.h"
 
#include <northbridge/amd/agesa/dimmSpd.h>
 
/**
 * Gets the SMBus address for an SPD from the array in devicetree.cb
 * then read the SPD into the supplied buffer.
 */
AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINTN unused2, AGESA_READ_SPD_PARAMS *info)
{
        UINT8 spdAddress;
 
        DEVTREE_CONST struct device *dev = pcidev_on_root(0x18, 2);
        if (dev == NULL)
                return AGESA_ERROR;
 
        DEVTREE_CONST struct northbridge_amd_agesa_family14_config *config = dev->chip_info;
        if (config == NULL)
                return AGESA_ERROR;
 
        if (info->SocketId >= ARRAY_SIZE(config->spdAddrLookup))
                return AGESA_ERROR;
        if (info->MemChannelId >= ARRAY_SIZE(config->spdAddrLookup[0]))
                return AGESA_ERROR;
        if (info->DimmId >= ARRAY_SIZE(config->spdAddrLookup[0][0]))
                return AGESA_ERROR;
 
        spdAddress = config->spdAddrLookup
                [info->SocketId][info->MemChannelId][info->DimmId];
 
        if (spdAddress == 0)
                return AGESA_ERROR;
 
        int err = smbus_readSpd(spdAddress, (void *) info->Buffer, DDR3_SPD_SIZE);
        if (err)
                return AGESA_ERROR;
        return AGESA_SUCCESS;
}