BiosCallOuts.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <AGESA.h>
#include <console/console.h>
#include <northbridge/amd/agesa/BiosCallOuts.h>
#include <SB800.h>
#include <southbridge/amd/cimx/sb800/gpio_oem.h>
 
/* Should AGESA_GNB_PCIE_SLOT_RESET use agesa_NoopSuccess?
 *
 * COM Express doesn't provide dedicated resets for individual lanes
 * and it's not needed for the on-board Intel I210 GbE controller.
 */
 
static AGESA_STATUS board_BeforeDramInit (UINT32 Func, UINTN Data, VOID *ConfigPtr);
 
const BIOS_CALLOUT_STRUCT BiosCallouts[] =
{
        {AGESA_DO_RESET,                        agesa_Reset },
        {AGESA_READ_SPD,                        agesa_ReadSpd },
        {AGESA_READ_SPD_RECOVERY,               agesa_NoopUnsupported },
        {AGESA_RUNFUNC_ONAP,                    agesa_RunFuncOnAp },
        {AGESA_GNB_PCIE_SLOT_RESET,             agesa_NoopUnsupported },
        {AGESA_HOOKBEFORE_DRAM_INIT,            board_BeforeDramInit },
        {AGESA_HOOKBEFORE_DRAM_INIT_RECOVERY,   agesa_NoopSuccess },
        {AGESA_HOOKBEFORE_DQS_TRAINING,         agesa_NoopSuccess },
        {AGESA_HOOKBEFORE_EXIT_SELF_REF,        agesa_NoopSuccess },
};
const int BiosCalloutsLen = ARRAY_SIZE(BiosCallouts);
 
/*      Call the host environment interface to provide a user hook opportunity. */
static AGESA_STATUS board_BeforeDramInit (UINT32 Func, UINTN Data, VOID *ConfigPtr)
{
        MEM_DATA_STRUCT *MemData = ConfigPtr;
 
        printk(BIOS_INFO, "Setting DDR3 voltage: ");
        FCH_IOMUX(65) = 1; // GPIO65: VMEM_LV_EN# lowers VMEM from 1.5 to 1.35V
        switch (MemData->ParameterListPtr->DDR3Voltage) {
        case VOLT1_25: // board is not able to provide this
                MemData->ParameterListPtr->DDR3Voltage = VOLT1_35; // sorry
                printk(BIOS_INFO, "can't provide 1.25 V, using ");
                __fallthrough;
        default: // AGESA.h says in mixed case 1.5V DIMMs get excluded
        case VOLT1_35:
                FCH_GPIO(65) = 0x08; // = output, disable PU, set to 0
                printk(BIOS_INFO, "1.35 V\n");
                break;
        case VOLT1_5:
                FCH_GPIO(65) = 0xC8; // = output, disable PU, set to 1
                printk(BIOS_INFO, "1.5 V\n");
        }
 
        return AGESA_SUCCESS;
}