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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/pci_def.h>
   4 #include <device/device.h>
   5
   6 /* warning: Porting.h includes an open #pragma pack(1) */
   7 #include <Porting.h>
   8 #include <AGESA.h>
   9 #include "chip.h"
  10
  11 #include <northbridge/amd/agesa/dimmSpd.h>
  12
  13 /**
  14  * Gets the SMBus address for an SPD from the array in devicetree.cb
  15  * then read the SPD into the supplied buffer.
  16  */
  17 AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINTN unused2, AGESA_READ_SPD_PARAMS *info)
  18 {
  19         UINT8 spdAddress;
  20
  21         DEVTREE_CONST struct device *dev = pcidev_on_root(0x18, 2);
  22         if (dev == NULL)
  23                 return AGESA_ERROR;
  24
  25         DEVTREE_CONST struct northbridge_amd_agesa_family15tn_config *config = dev->chip_info;
  26         if (config == NULL)
  27                 return AGESA_ERROR;
  28
  29         if (info->SocketId >= ARRAY_SIZE(config->spdAddrLookup))
  30                 return AGESA_ERROR;
  31         if (info->MemChannelId >= ARRAY_SIZE(config->spdAddrLookup[0]))
  32                 return AGESA_ERROR;
  33         if (info->DimmId >= ARRAY_SIZE(config->spdAddrLookup[0][0]))
  34                 return AGESA_ERROR;
  35
  36         spdAddress = config->spdAddrLookup
  37                 [info->SocketId][info->MemChannelId][info->DimmId];
  38
  39         if (spdAddress == 0)
  40                 return AGESA_ERROR;
  41
  42         int err = hudson_readSpd(spdAddress, (void *) info->Buffer, 256);
  43         if (err)
  44                 return AGESA_ERROR;
  45         return AGESA_SUCCESS;
  46 }