romstage.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <amdblocks/acpimmio.h>
#include <northbridge/amd/agesa/state_machine.h>
#include "gpio_ftns.h"
#include <SB800.h>
#include <sb_cimx.h>
 
static void early_lpc_init(void)
{
        /* PC Engines requires system boot when power is applied. This feature is
         * controlled in PM_REG 5Bh register. "Always Power On" works by writing a
         * value of 05h.
         */
        u8 bdata = pm_read8(SB_PMIOA_REG5B);
        bdata &= 0xf8; //clear bits 0-2
        bdata |= 0x05; //set bits 0,2
        pm_write8(SB_PMIOA_REG5B, bdata);
 
        /* Multi-function pins switch to GPIO0-35, these pins are shared with PCI pins */
        bdata = pm_read8(SB_PMIOA_REGEA);
        bdata &= 0xfe; //clear bit 0
        bdata |= 0x01; //set bit 0
        pm_write8(SB_PMIOA_REGEA, bdata);
 
        //configure required GPIOs
        configure_gpio(GPIO_10,  GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_HIGH);
        configure_gpio(GPIO_11,  GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_HIGH);
        configure_gpio(GPIO_15,  GPIO_FTN_1, GPIO_INPUT);
        configure_gpio(GPIO_16,  GPIO_FTN_1, GPIO_INPUT);
        configure_gpio(GPIO_17,  GPIO_FTN_1, GPIO_INPUT);
        configure_gpio(GPIO_18,  GPIO_FTN_1, GPIO_INPUT);
        configure_gpio(GPIO_187, GPIO_FTN_1, GPIO_INPUT);
        configure_gpio(GPIO_189, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_LOW);
        configure_gpio(GPIO_190, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_LOW);
        configure_gpio(GPIO_191, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_LOW);
}
 
void board_BeforeAgesa(struct sysinfo *cb)
{
        early_lpc_init();
}