| /* |
| * 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. |
| * |
| * 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 <stdint.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <pc80/isa-dma.h> |
| #include <pc80/mc146818rtc.h> |
| #include "i82371eb.h" |
| |
| static void isa_init(struct device *dev) |
| { |
| u16 reg16; |
| u32 reg32; |
| |
| /* Initialize the real time clock (RTC). */ |
| rtc_init(0); |
| |
| /* Enable access to all BIOS regions. */ |
| reg16 = pci_read_config16(dev, XBCS); |
| reg16 |= LOWER_BIOS_ENABLE; |
| reg16 |= EXT_BIOS_ENABLE; |
| reg16 |= EXT_BIOS_ENABLE_1MB; |
| reg16 &= ~(WRITE_PROTECT_ENABLE); /* Disable ROM write access. */ |
| pci_write_config16(dev, XBCS, reg16); |
| |
| /* |
| * The PIIX4 can support the full ISA bus, or the Extended I/O (EIO) |
| * bus, which is a subset of ISA. We select the full ISA bus here. |
| */ |
| reg32 = pci_read_config32(dev, GENCFG); |
| reg32 |= ISA; /* Select ISA, not EIO. */ |
| pci_write_config16(dev, GENCFG, reg32); |
| |
| /* Initialize ISA DMA. */ |
| isa_dma_init(); |
| } |
| |
| static const struct device_operations isa_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = isa_init, |
| .scan_bus = scan_static_bus, /* TODO: Needed? */ |
| .enable = 0, |
| .ops_pci = 0, /* No subsystem IDs on 82371EB! */ |
| }; |
| |
| static const struct pci_driver isa_driver __pci_driver = { |
| .ops = &isa_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = PCI_DEVICE_ID_INTEL_82371AB_ISA, |
| }; |
| |
| static const struct pci_driver isa_SB_driver __pci_driver = { |
| .ops = &isa_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = PCI_DEVICE_ID_INTEL_82371SB_ISA, |
| }; |