158 lines
4.5 KiB
C
158 lines
4.5 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2003-2004 Linux Networx
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* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
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* Copyright (C) 2003 Ronald G. Minnich <rminnich@gmail.com>
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* Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
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* Copyright (C) 2005 Tyan
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* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <console/console.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <reset.h>
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const char mainboard_name[] = CONFIG_MAINBOARD_VENDOR " " CONFIG_MAINBOARD_PART_NUMBER;
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/**
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* Scan devices on static buses.
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*
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* The enumeration of certain buses is purely static. The existence of
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* devices on those buses can be completely determined at compile time
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* and is specified in the config file. Typical examples are the 'PNP'
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* devices on a legacy ISA/LPC bus. There is no need of probing of any kind,
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* the only thing we have to do is to walk through the bus and
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* enable or disable devices as indicated in the config file.
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*
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* On the other hand, some devices are virtual and their existence is
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* artificial. They can not be probed at run time. One example is the
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* debug device. Those virtual devices have to be listed in the config
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* file under some static bus in order to be enumerated at run time.
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*
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* @param bus Pointer to the device to which the static buses are attached to.
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*/
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void scan_static_bus(device_t bus)
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{
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device_t child;
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struct bus *link;
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for (link = bus->link_list; link; link = link->next) {
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for (child = link->children; child; child = child->sibling) {
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if (child->chip_ops && child->chip_ops->enable_dev)
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child->chip_ops->enable_dev(child);
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if (child->ops && child->ops->enable)
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child->ops->enable(child);
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printk(BIOS_DEBUG, "%s %s\n", dev_path(child),
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child->enabled ? "enabled" : "disabled");
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}
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}
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}
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void scan_lpc_bus(device_t bus)
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{
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printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));
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scan_static_bus(bus);
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printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
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}
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void scan_smbus(device_t bus)
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{
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device_t child;
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struct bus *link;
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static int smbus_max = 0;
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printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));
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for (link = bus->link_list; link; link = link->next) {
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link->secondary = ++smbus_max;
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for (child = link->children; child; child = child->sibling) {
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if (child->chip_ops && child->chip_ops->enable_dev)
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child->chip_ops->enable_dev(child);
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if (child->ops && child->ops->enable)
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child->ops->enable(child);
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printk(BIOS_DEBUG, "smbus: %s[%d]->", dev_path(child->bus->dev),
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child->bus->link_num);
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printk(BIOS_DEBUG, "%s %s\n", dev_path(child),
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child->enabled ? "enabled" : "disabled");
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}
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}
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printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
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}
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/**
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* Scan root bus for generic systems.
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*
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* This function is the default scan_bus() method of the root device.
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*
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* @param root The root device structure.
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*/
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static void root_dev_scan_bus(device_t bus)
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{
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struct bus *link;
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printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));
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scan_static_bus(bus);
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for (link = bus->link_list; link; link = link->next)
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scan_bridges(link);
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printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
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}
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static void root_dev_reset(struct bus *bus)
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{
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printk(BIOS_INFO, "Resetting board...\n");
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hard_reset();
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}
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#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
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static const char *root_dev_acpi_name(struct device *dev)
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{
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return "\\_SB";
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}
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#endif
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/**
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* Default device operation for root device.
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*
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* This is the default device operation for root devices. These operations
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* should be fully usable as is. However the chip_operations::enable_dev()
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* of a motherboard can override this if you want non-default behavior.
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*/
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struct device_operations default_dev_ops_root = {
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.read_resources = DEVICE_NOOP,
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.set_resources = DEVICE_NOOP,
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.enable_resources = DEVICE_NOOP,
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.init = DEVICE_NOOP,
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.scan_bus = root_dev_scan_bus,
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.reset_bus = root_dev_reset,
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#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
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.acpi_name = root_dev_acpi_name,
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#endif
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};
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