early_init.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootblock_common.h>
#include <delay.h>
#include <stdint.h>
#include <device/pnp_ops.h>
#include <device/pci_ops.h>
#include <device/pnp_def.h>
#include <northbridge/intel/i945/i945.h>
#include <southbridge/intel/i82801gx/i82801gx.h>
#include <southbridge/intel/common/gpio.h>
#include "dock.h"
 
/* Override the default lpc decode ranges */
void mainboard_lpc_decode(void)
{
        // decode range
        pci_write_config16(PCI_DEV(0, 0x1f, 0), LPC_IO_DEC, 0x0210);
}
 
static void early_superio_config(void)
{
        int timeout = 100000;
        const pnp_devfn_t dev = PNP_DEV(0x2e, 3);
 
        pnp_write_config(dev, 0x29, 0xa0);
 
        while (!(pnp_read_config(dev, 0x29) & 0x10) && timeout--)
                udelay(1000);
 
        /* Enable COM1 */
        pnp_set_logical_device(dev);
        pnp_set_iobase(dev, PNP_IDX_IO0, 0x3f8);
        pnp_set_enable(dev, 1);
}
 
void bootblock_mainboard_early_init(void)
{
        /* Set up GPIO's early since it is needed for dock init */
        i82801gx_setup_bars();
        setup_pch_gpios(&mainboard_gpio_map);
 
        int dock_err = dlpc_init();
 
        /* We prefer Legacy I/O module over docking */
        if (legacy_io_present()) {
                legacy_io_init();
                early_superio_config();
        } else if (!dock_err && dock_present()) {
                dock_connect();
                early_superio_config();
        }
}
 
void mainboard_late_rcba_config(void)
{
        /* Device 1f interrupt pin register */
        RCBA32(D31IP) = 0x00001230;
        RCBA32(D29IP) = 0x40004321;
 
        /* PCIe Interrupts */
        RCBA32(D28IP) = 0x00004321;
        /* HD Audio Interrupt */
        RCBA32(D27IP) = 0x00000002;
 
        /* dev irq route register */
        RCBA16(D31IR) = 0x1007;
        RCBA16(D30IR) = 0x0076;
        RCBA16(D29IR) = 0x3210;
        RCBA16(D28IR) = 0x7654;
        RCBA16(D27IR) = 0x0010;
 
        /* Disable unused devices */
        RCBA32(FD) |= FD_INTLAN;
 
        /* Set up I/O Trap #0 for 0xfe00 (SMIC) */
        RCBA64(IOTR0) = 0x000200010000fe01ULL;
 
        /* Set up I/O Trap #3 for 0x800-0x80c (Trap) */
        RCBA64(IOTR3) = 0x000200f0000c0801ULL;
}
 
void mainboard_get_spd_map(u8 spd_map[4])
{
        spd_map[0] = 0x50;
        spd_map[2] = 0x51;
}