/* * This file is part of the coreboot project. * * Copyright (C) 2003-2004 Linux Networx * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx) * Copyright (C) 2003 Ronald G. Minnich <rminnich@gmail.com> * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov> * Copyright (C) 2005 Tyan * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan) * * 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; version 2 of the License. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include <console/console.h> #include <device/device.h> #include <device/pci.h> #include <reset.h> const char mainboard_name[] = CONFIG_MAINBOARD_VENDOR " " CONFIG_MAINBOARD_PART_NUMBER; /** * Read the resources for the root device, that encompass the resources for * the entire system. * * @param root Pointer to the device structure for the system root device. */ static void root_dev_read_resources(device_t root) { printk(BIOS_ERR, "%s should never be called.\n", __func__); } /** * Write the resources for every device. * * Write the resources for the root device, and every device under it which * are all of the devices. * * @param root Pointer to the device structure for the system root device. */ static void root_dev_set_resources(device_t root) { printk(BIOS_ERR, "%s should never be called.\n", __func__); } /** * Scan devices on static buses. * * The enumeration of certain buses is purely static. The existence of * devices on those buses can be completely determined at compile time * and is specified in the config file. Typical examples are the 'PNP' * devices on a legacy ISA/LPC bus. There is no need of probing of any kind, * the only thing we have to do is to walk through the bus and * enable or disable devices as indicated in the config file. * * On the other hand, some devices are virtual and their existence is * artificial. They can not be probed at run time. One example is the * debug device. Those virtual devices have to be listed in the config * file under some static bus in order to be enumerated at run time. * * This function is the default scan_bus() method for the root device and * LPC bridges. * * @param bus Pointer to the device to which the static buses are attached to. * @param max Maximum bus number currently used before scanning. * @return The largest bus number used. */ static int smbus_max = 0; unsigned int scan_static_bus(device_t bus, unsigned int max) { device_t child; struct bus *link; printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus)); for (link = bus->link_list; link; link = link->next) { /* For SMBus bus enumerate. */ child = link->children; if (child && child->path.type == DEVICE_PATH_I2C) link->secondary = ++smbus_max; for (child = link->children; child; child = child->sibling) { if (child->chip_ops && child->chip_ops->enable_dev) child->chip_ops->enable_dev(child); if (child->ops && child->ops->enable) child->ops->enable(child); if (child->path.type == DEVICE_PATH_I2C) { printk(BIOS_DEBUG, "smbus: %s[%d]->", dev_path(child->bus->dev), child->bus->link_num); } printk(BIOS_DEBUG, "%s %s\n", dev_path(child), child->enabled ? "enabled" : "disabled"); } } for (link = bus->link_list; link; link = link->next) { for (child = link->children; child; child = child->sibling) { if (!child->ops || !child->ops->scan_bus) continue; printk(BIOS_SPEW, "%s scanning...\n", dev_path(child)); max = scan_bus(child, max); } } printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus)); return max; } static void root_dev_enable_resources(device_t dev) { } /** * Scan root bus for generic systems. * * This function is the default scan_bus() method of the root device. * * @param root The root device structure. * @param max The current bus number scanned so far, usually 0x00. * @return The largest bus number used. */ static unsigned int root_dev_scan_bus(device_t root, unsigned int max) { return scan_static_bus(root, max); } static void root_dev_init(device_t root) { } static void root_dev_reset(struct bus *bus) { printk(BIOS_INFO, "Resetting board...\n"); hard_reset(); } /** * Default device operation for root device. * * This is the default device operation for root devices. These operations * should be fully usable as is. However the chip_operations::enable_dev() * of a motherboard can override this if you want non-default behavior. */ struct device_operations default_dev_ops_root = { .read_resources = root_dev_read_resources, .set_resources = root_dev_set_resources, .enable_resources = root_dev_enable_resources, .init = root_dev_init, .scan_bus = root_dev_scan_bus, .reset_bus = root_dev_reset, };