src/northbridge/amd/agesa/family15tn/dimmSpd.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2012 Advanced Micro Devices, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <device/pci_def.h>
  17 #include <device/device.h>
  18 #include <stdlib.h>
  19
  20 /* warning: Porting.h includes an open #pragma pack(1) */
  21 #include "Porting.h"
  22 #include "AGESA.h"
  23 #include "chip.h"
  24
  25 #include <northbridge/amd/agesa/dimmSpd.h>
  26
  27 /**
  28  * Gets the SMBus address for an SPD from the array in devicetree.cb
  29  * then read the SPD into the supplied buffer.
  30  */
  31 AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINTN unused2, AGESA_READ_SPD_PARAMS *info)
  32 {
  33         UINT8 spdAddress;
  34
  35         DEVTREE_CONST struct device *dev = dev_find_slot(0, PCI_DEVFN(0x18, 2));
  36         if (dev == NULL)
  37                 return AGESA_ERROR;
  38
  39         DEVTREE_CONST struct northbridge_amd_agesa_family15tn_config *config = dev->chip_info;
  40         if (config == NULL)
  41                 return AGESA_ERROR;
  42
  43         if (info->SocketId >= ARRAY_SIZE(config->spdAddrLookup))
  44                 return AGESA_ERROR;
  45         if (info->MemChannelId >= ARRAY_SIZE(config->spdAddrLookup[0]))
  46                 return AGESA_ERROR;
  47         if (info->DimmId >= ARRAY_SIZE(config->spdAddrLookup[0][0]))
  48                 return AGESA_ERROR;
  49
  50         spdAddress = config->spdAddrLookup
  51                 [info->SocketId][info->MemChannelId][info->DimmId];
  52
  53         if (spdAddress == 0)
  54                 return AGESA_ERROR;
  55
  56         int err = hudson_readSpd(spdAddress, (void *) info->Buffer, 128);
  57         if (err)
  58                 return AGESA_ERROR;
  59         return AGESA_SUCCESS;
  60 }