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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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.
*/
/* TODO: Check if this really works for all of the southbridges. */
#include <stdint.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "chip.h"
#include "i82371eb.h"
/**
* Initialize the IDE controller.
*
* Depending on the configuration variables 'ide0_enable' and 'ide1_enable'
* enable or disable the primary and secondary IDE interface, respectively.
*
* Depending on the configuration variable 'ide_legacy_enable' enable or
* disable access to the legacy IDE ports and the PCI Bus Master IDE I/O
* registers (this is required for e.g. FILO).
*
* @param dev The device to use.
*/
static void ide_init_enable(struct device *dev)
{
u16 reg16;
struct southbridge_intel_i82371eb_config *conf = dev->chip_info;
/* Enable/disable the primary IDE interface. */
reg16 = pci_read_config16(dev, IDETIM_PRI);
reg16 = ONOFF(conf->ide0_enable, reg16, IDE_DECODE_ENABLE);
pci_write_config16(dev, IDETIM_PRI, reg16);
printk(BIOS_DEBUG, "IDE: %s IDE interface: %s\n", "Primary",
conf->ide0_enable ? "on" : "off");
/* Enable/disable the secondary IDE interface. */
reg16 = pci_read_config16(dev, IDETIM_SEC);
reg16 = ONOFF(conf->ide1_enable, reg16, IDE_DECODE_ENABLE);
pci_write_config16(dev, IDETIM_SEC, reg16);
printk(BIOS_DEBUG, "IDE: %s IDE interface: %s\n", "Secondary",
conf->ide1_enable ? "on" : "off");
/* Enable access to the legacy IDE ports (both primary and secondary),
* and the PCI Bus Master IDE I/O registers.
* Only do this if at least one IDE interface is enabled.
*/
if (conf->ide0_enable || conf->ide1_enable) {
reg16 = pci_read_config16(dev, PCI_COMMAND);
reg16 = ONOFF(conf->ide_legacy_enable, reg16,
(PCI_COMMAND_IO | PCI_COMMAND_MASTER));
pci_write_config16(dev, PCI_COMMAND, reg16);
printk(BIOS_DEBUG, "IDE: Access to legacy IDE ports: %s\n",
conf->ide_legacy_enable ? "on" : "off");
}
}
/**
* Initialize the Ultra DMA/33 support of the IDE controller.
*
* Depending on the configuration variables 'ide0_drive0_udma33_enable',
* 'ide0_drive1_udma33_enable', 'ide1_drive0_udma33_enable', and
* 'ide1_drive1_udma33_enable' enable or disable Ultra DMA/33 support for
* the respective IDE controller and drive.
*
* Only do that if the respective controller is actually enabled, of course.
*
* @param dev The device to use.
*/
static void ide_init_udma33(struct device *dev)
{
u8 reg8;
struct southbridge_intel_i82371eb_config *conf = dev->chip_info;
/* Enable/disable UDMA/33 operation (primary IDE interface). */
if (conf->ide0_enable) {
reg8 = pci_read_config8(dev, UDMACTL);
reg8 = ONOFF(conf->ide0_drive0_udma33_enable, reg8, PSDE0);
reg8 = ONOFF(conf->ide0_drive1_udma33_enable, reg8, PSDE1);
pci_write_config8(dev, UDMACTL, reg8);
printk(BIOS_DEBUG, "IDE: %s, drive %d: UDMA/33: %s\n",
"Primary IDE interface", 0,
conf->ide0_drive0_udma33_enable ? "on" : "off");
printk(BIOS_DEBUG, "IDE: %s, drive %d: UDMA/33: %s\n",
"Primary IDE interface", 1,
conf->ide0_drive1_udma33_enable ? "on" : "off");
}
/* Enable/disable Ultra DMA/33 operation (secondary IDE interface). */
if (conf->ide1_enable) {
reg8 = pci_read_config8(dev, UDMACTL);
reg8 = ONOFF(conf->ide1_drive0_udma33_enable, reg8, SSDE0);
reg8 = ONOFF(conf->ide1_drive1_udma33_enable, reg8, SSDE1);
pci_write_config8(dev, UDMACTL, reg8);
printk(BIOS_DEBUG, "IDE: %s, drive %d: UDMA/33: %s\n",
"Secondary IDE interface", 0,
conf->ide1_drive0_udma33_enable ? "on" : "off");
printk(BIOS_DEBUG, "IDE: %s, drive %d: UDMA/33: %s\n",
"Secondary IDE interface", 1,
conf->ide1_drive1_udma33_enable ? "on" : "off");
}
}
/**
* IDE init for the Intel 82371AB/EB/MB IDE controller.
*
* @param dev The device to use.
*/
static void ide_init_i82371ab_eb_mb(struct device *dev)
{
ide_init_enable(dev);
ide_init_udma33(dev);
}
/* Intel 82371AB/EB/MB */
static const struct device_operations ide_ops_ab_eb_mb = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = ide_init_i82371ab_eb_mb,
.scan_bus = 0,
.enable = 0,
.ops_pci = 0, /* No subsystem IDs on 82371XX! */
};
/* Intel 82371AB/EB/MB */
static const struct pci_driver ide_driver_ab_eb_mb __pci_driver = {
.ops = &ide_ops_ab_eb_mb,
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_82371AB_IDE,
};
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