early_init.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootblock_common.h>
#include <stdint.h>
#include <arch/io.h>
#include <cf9_reset.h>
#include <device/pnp_ops.h>
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <option.h>
#include <northbridge/intel/i945/i945.h>
#include <southbridge/intel/i82801gx/i82801gx.h>
#include <superio/smsc/lpc47n227/lpc47n227.h>
 
/* Override the default lpc decode ranges */
void mainboard_lpc_decode(void)
{
        int lpt_en = 0;
 
        if (get_uint_option("lpt", 0))
                lpt_en = LPT_LPC_EN; /* enable LPT */
 
        pci_write_config16(PCI_DEV(0, 0x1f, 0), LPC_IO_DEC, 0x0007);
 
        pci_update_config16(PCI_DEV(0, 0x1f, 0), LPC_EN, ~LPT_LPC_EN, lpt_en);
}
 
/* This box has two superios, so enabling serial becomes slightly excessive.
 * We disable a lot of stuff to make sure that there are no conflicts between
 * the two. Also set up the GPIOs from the beginning. This is the "no schematic
 * but safe anyways" method.
 */
 
void bootblock_mainboard_early_init(void)
{
        const pnp_devfn_t dev = PNP_DEV(0x2e, 0x00);
 
        pnp_enter_conf_state(dev);
        pnp_write_config(dev, 0x01, 0x94); /* Extended Parport modes */
        pnp_write_config(dev, 0x02, 0x88); /* UART power on */
        pnp_write_config(dev, 0x03, 0x72); /* Floppy */
        pnp_write_config(dev, 0x04, 0x01); /* EPP + SPP */
        pnp_write_config(dev, 0x14, 0x03); /* Floppy */
        pnp_write_config(dev, 0x20, (0x3f0 >> 2)); /* Floppy */
        pnp_write_config(dev, 0x23, (0x378 >> 2)); /* PP base */
        pnp_write_config(dev, 0x24, (0x3f8 >> 2)); /* UART1 base */
        pnp_write_config(dev, 0x25, (0x2f8 >> 2)); /* UART2 base */
        pnp_write_config(dev, 0x26, (2 << 4) | 0); /* FDC + PP DMA */
        pnp_write_config(dev, 0x27, (6 << 4) | 7); /* FDC + PP DMA */
        pnp_write_config(dev, 0x28, (4 << 4) | 3); /* UART1,2 IRQ */
        /* These are the SMI status registers in the SIO: */
        pnp_write_config(dev, 0x30, (0x600 >> 4)); /* Runtime Register Block Base */
 
        pnp_write_config(dev, 0x31, 0x00); /* GPIO1 DIR */
        pnp_write_config(dev, 0x32, 0x00); /* GPIO1 POL */
        pnp_write_config(dev, 0x33, 0x40); /* GPIO2 DIR */
        pnp_write_config(dev, 0x34, 0x00); /* GPIO2 POL */
        pnp_write_config(dev, 0x35, 0xff); /* GPIO3 DIR */
        pnp_write_config(dev, 0x36, 0x00); /* GPIO3 POL */
        pnp_write_config(dev, 0x37, 0xe0); /* GPIO4 DIR */
        pnp_write_config(dev, 0x38, 0x00); /* GPIO4 POL */
        pnp_write_config(dev, 0x39, 0x80); /* GPIO4 POL */
 
        pnp_exit_conf_state(dev);
}
 
void mainboard_late_rcba_config(void)
{
        /* Device 1f interrupt pin register */
        RCBA32(D31IP) = 0x00042220;
 
        /* dev irq route register */
        RCBA16(D31IR) = 0x0232;
        RCBA16(D30IR) = 0x3246;
        RCBA16(D29IR) = 0x0237;
        RCBA16(D28IR) = 0x3201;
        RCBA16(D27IR) = 0x3216;
 
        /* Disable unused devices */
        RCBA32(FD) |= FD_INTLAN;
 
        /* This should probably go into the ACPI OS Init trap */
 
        /* Set up I/O Trap #0 for 0xfe00 (SMIC) */
        RCBA32(0x1e84) = 0x00020001;
        RCBA32(0x1e80) = 0x0000fe01;
 
        /* Set up I/O Trap #3 for 0x800-0x80c (Trap) */
        RCBA32(0x1e9c) = 0x000200f0;
        RCBA32(0x1e98) = 0x000c0801;
}
 
static void init_artec_dongle(void)
{
        /* Enable 4MB decoding */
        outb(0xf1, 0x88);
        outb(0xf4, 0x88);
}
 
void mainboard_pre_raminit_config(int s3_resume)
{
        init_artec_dongle();
}