| /* |
| * 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. |
| */ |
| |
| #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 <pc80/isa-dma.h> |
| #include <pc80/mc146818rtc.h> |
| #include <arch/ioapic.h> |
| #if CONFIG(HAVE_ACPI_TABLES) |
| #include <arch/acpi.h> |
| #include <arch/acpigen.h> |
| #endif |
| #include "i82371eb.h" |
| #include "chip.h" |
| |
| static void isa_init(struct device *dev) |
| { |
| u32 reg32; |
| struct southbridge_intel_i82371eb_config *sb = dev->chip_info; |
| |
| /* Initialize the real time clock (RTC). */ |
| cmos_init(0); |
| |
| /* |
| * Enable special cycles, needed for soft poweroff. |
| */ |
| reg32 = pci_read_config16(dev, PCI_COMMAND); |
| reg32 |= PCI_COMMAND_SPECIAL; |
| pci_write_config16(dev, PCI_COMMAND, reg32); |
| |
| /* |
| * 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. */ |
| |
| /* Some boards use GPO22/23. Select it if configured. */ |
| reg32 = ONOFF(sb->gpo22_enable, reg32, GPO2223); |
| pci_write_config32(dev, GENCFG, reg32); |
| |
| /* Initialize ISA DMA. */ |
| isa_dma_init(); |
| |
| /* |
| * Unlike most other southbridges the 82371EB doesn't have a built-in |
| * IOAPIC. Instead, 82371EB-based boards that support multiple CPUs |
| * have a discrete IOAPIC (Intel 82093AA) soldered onto the board. |
| * |
| * Thus, we can/must only enable the IOAPIC if it actually exists, |
| * i.e. the respective mainboard does "select IOAPIC". |
| */ |
| if (CONFIG(IOAPIC)) { |
| u16 reg16; |
| u8 ioapic_id = 2; |
| volatile u32 *ioapic_index = (volatile u32 *)(IO_APIC_ADDR); |
| volatile u32 *ioapic_data = (volatile u32 *)(IO_APIC_ADDR + 0x10); |
| |
| /* Enable IOAPIC. */ |
| reg16 = pci_read_config16(dev, XBCS); |
| reg16 |= (1 << 8); /* APIC Chip Select */ |
| pci_write_config16(dev, XBCS, reg16); |
| |
| /* Set the IOAPIC ID. */ |
| *ioapic_index = 0; |
| *ioapic_data = ioapic_id << 24; |
| |
| /* Read back and verify the IOAPIC ID. */ |
| *ioapic_index = 0; |
| reg32 = (*ioapic_data >> 24) & 0x0f; |
| printk(BIOS_DEBUG, "IOAPIC ID = %x\n", reg32); |
| if (reg32 != ioapic_id) |
| die("IOAPIC error!\n"); |
| } |
| } |
| |
| static void sb_read_resources(struct device *dev) |
| { |
| struct resource *res; |
| |
| pci_dev_read_resources(dev); |
| |
| res = new_resource(dev, 1); |
| res->base = 0x0UL; |
| res->size = 0x1000UL; |
| res->limit = 0xffffUL; |
| res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; |
| |
| res = new_resource(dev, 2); |
| res->base = 0xff800000UL; |
| res->size = 0x00800000UL; /* 8 MB for flash */ |
| res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED | |
| IORESOURCE_RESERVE; |
| |
| #if CONFIG(IOAPIC) |
| res = new_resource(dev, 3); /* IOAPIC */ |
| res->base = IO_APIC_ADDR; |
| res->size = 0x00001000; |
| res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED | |
| IORESOURCE_RESERVE; |
| #endif |
| } |
| |
| #if CONFIG(HAVE_ACPI_TABLES) |
| static void southbridge_acpi_fill_ssdt_generator(struct device *device) |
| { |
| acpigen_write_mainboard_resources("\\_SB.PCI0.MBRS", "_CRS"); |
| generate_cpu_entries(device); |
| } |
| #endif |
| |
| static const struct device_operations isa_ops = { |
| .read_resources = sb_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| #if CONFIG(HAVE_ACPI_TABLES) |
| .write_acpi_tables = acpi_write_hpet, |
| .acpi_fill_ssdt_generator = southbridge_acpi_fill_ssdt_generator, |
| #endif |
| .init = isa_init, |
| .scan_bus = scan_static_bus, |
| .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, |
| }; |