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mainboard/winnet/g170: Initialize the IRQ routing 

Initialize IRQ routing for legacy non-PNP OSes the same as the factory
firmware would do.

Change-Id: I0c7a7d584a2c47471456ab54ef6da815a2dc4e7c
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-on: https://review.coreboot.org/18900
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Lubomir Rintel 2017-02-26 16:41:36 +01:00 committed by Martin Roth
parent 382783d017
commit 24512dee2b
1 changed files with 55 additions and 0 deletions
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55
src/mainboard/winnet/g170/mainboard.c Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Lubomir Rintel <lkundrak@v3.sk>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <arch/acpi.h>
static void mainboard_final(void *chip_info)
{
/* A B C D */
static const unsigned char irq_map[4] = { 11, 5, 10, 0 };
device_t lpc_dev;
printk(BIOS_INFO, "Setting up G170 IRQ routing...\n");
lpc_dev = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_VT8237R_LPC, 0);
/* Disable APIC */
pci_write_config8(lpc_dev, 0x58, pci_read_config8(lpc_dev, 0x58) & ~0x40);
/* Share INTE-INTH with INTA-INTD */
pci_write_config8(lpc_dev, 0x46, 0x00);
/* Route INTA-INTD */
pci_write_config8(lpc_dev, 0x55, irq_map[0] << 4);
pci_write_config8(lpc_dev, 0x56, irq_map[1] << 4 | irq_map[2]);
pci_write_config8(lpc_dev, 0x57, irq_map[3]);
/* Assign IRQ numbers to known devices for non-PnP OSes */
pci_assign_irqs(0x00, 0x10, irq_map);
pci_assign_irqs(0x00, 0x11, irq_map);
pci_assign_irqs(0x00, 0x12, irq_map);
pci_assign_irqs(0x01, 0x00, irq_map);
}
struct chip_operations mainboard_ops = {
CHIP_NAME("WinNET G170")
.final = mainboard_final,
};