/* * This file is part of the coreboot project. * * Copyright (C) 2003 Linux Networx * Copyright (C) 2003 SuSE Linux AG * Copyright (C) 2005 Tyan Computer * (Written by Yinghai Lu <yinghailu@gmail.com> for Tyan Computer) * * 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. */ #include <console/console.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_ids.h> #include <pc80/mc146818rtc.h> #include <pc80/isa-dma.h> #include <arch/io.h> #include <arch/ioapic.h> #include "i82801ax.h" #define GPIO_BASE_ADDR 0x00000500 /* GPIO Base Address Register */ #define NMI_OFF 0 typedef struct southbridge_intel_i82801ax_config config_t; /* PIRQ[n]_ROUT[3:0] - IRQ Routing (ISA compatible) * 0x00 - 0000 = Reserved * 0x01 - 0001 = Reserved * 0x02 - 0010 = Reserved * 0x03 - 0011 = IRQ3 * 0x04 - 0100 = IRQ4 * 0x05 - 0101 = IRQ5 * 0x06 - 0110 = IRQ6 * 0x07 - 0111 = IRQ7 * 0x08 - 1000 = Reserved * 0x09 - 1001 = IRQ9 * 0x0A - 1010 = IRQ10 * 0x0B - 1011 = IRQ11 * 0x0C - 1100 = IRQ12 * 0x0D - 1101 = Reserved * 0x0E - 1110 = IRQ14 * 0x0F - 1111 = IRQ15 * * PIRQ[n]_ROUT[7] - Interrupt Routing Enable (IRQEN) * 0 - The PIRQ is routed to the ISA-compatible interrupt specified above. * 1 - The PIRQ is not routed to the 8259. */ #define PIRQA 0x03 #define PIRQB 0x04 #define PIRQC 0x05 #define PIRQD 0x06 /* * Use 0x0ef8 for a bitmap to cover all these IRQ's. * Use the defined IRQ values above or set mainboard * specific IRQ values in your devicetree.cb. */ /** * Enable ACPI I/O range. * * @param dev PCI device with ACPI and PM BAR's */ static void i82801ax_enable_acpi(struct device *dev) { /* Set ACPI base address (I/O space). */ pci_write_config32(dev, PMBASE, (PMBASE_ADDR | 1)); /* Enable ACPI I/O range decode and ACPI power management. */ pci_write_config8(dev, ACPI_CNTL, ACPI_EN); } /** * Set miscellanous static southbridge features. * * @param dev PCI device with I/O APIC control registers */ static void i82801ax_enable_ioapic(struct device *dev) { u32 reg32; reg32 = pci_read_config32(dev, GEN_CNTL); reg32 |= (1 << 13); /* Coprocessor error enable (COPR_ERR_EN) */ reg32 |= (3 << 7); /* IOAPIC enable (APIC_EN) */ reg32 |= (1 << 2); /* DMA collection buffer enable (DCB_EN) */ reg32 |= (1 << 1); /* Delayed transaction enable (DTE) */ pci_write_config32(dev, GEN_CNTL, reg32); printk(BIOS_DEBUG, "IOAPIC Southbridge enabled %x\n", reg32); set_ioapic_id(VIO_APIC_VADDR, 0x02); /* * Select Boot Configuration register (0x03) and * use Processor System Bus (0x01) to deliver interrupts. */ io_apic_write(VIO_APIC_VADDR, 0x03, 0x01); } static void i82801ax_enable_serial_irqs(struct device *dev) { /* Set packet length and toggle silent mode bit. */ pci_write_config8(dev, SERIRQ_CNTL, (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0)); pci_write_config8(dev, SERIRQ_CNTL, (1 << 7) | (0 << 6) | ((21 - 17) << 2) | (0 << 0)); /* TODO: Explain/#define the real meaning of these magic numbers. */ } static void i82801ax_pirq_init(device_t dev) { u8 reg8; config_t *config = dev->chip_info; reg8 = (config->pirqa_routing) ? config->pirqa_routing : PIRQA; pci_write_config8(dev, PIRQA_ROUT, reg8); reg8 = (config->pirqb_routing) ? config->pirqb_routing : PIRQB; pci_write_config8(dev, PIRQB_ROUT, reg8); reg8 = (config->pirqc_routing) ? config->pirqc_routing : PIRQC; pci_write_config8(dev, PIRQC_ROUT, reg8); reg8 = (config->pirqd_routing) ? config->pirqd_routing : PIRQD; pci_write_config8(dev, PIRQD_ROUT, reg8); } static void i82801ax_power_options(device_t dev) { uint8_t byte; int pwr_on = -1; int nmi_option; /* power after power fail */ /* FIXME this doesn't work! */ /* Which state do we want to goto after g3 (power restored)? * 0 == S0 Full On * 1 == S5 Soft Off */ pci_write_config8(dev, GEN_PMCON_3, pwr_on ? 0 : 1); printk(BIOS_INFO, "Set power %s if power fails\n", pwr_on ? "on" : "off"); /* Set up NMI on errors. */ byte = inb(0x61); byte &= ~(1 << 3); /* IOCHK# NMI Enable */ byte &= ~(1 << 2); /* PCI SERR# Enable */ outb(byte, 0x61); byte = inb(0x70); nmi_option = NMI_OFF; get_option(&nmi_option, "nmi"); if (nmi_option) { byte &= ~(1 << 7); /* Set NMI. */ outb(byte, 0x70); } } static void gpio_init(device_t dev) { pci_write_config32(dev, GPIO_BASE, (GPIO_BASE_ADDR | 1)); pci_write_config8(dev, GPIO_CNTL, GPIO_EN); } static void i82801ax_rtc_init(struct device *dev) { uint8_t reg8; uint32_t reg32; int rtc_failed; reg8 = pci_read_config8(dev, GEN_PMCON_3); rtc_failed = reg8 & RTC_BATTERY_DEAD; if (rtc_failed) { reg8 &= ~(1 << 1); /* Preserve the power fail state. */ pci_write_config8(dev, GEN_PMCON_3, reg8); } reg32 = pci_read_config32(dev, GEN_STA); rtc_failed |= reg32 & (1 << 2); cmos_init(rtc_failed); /* Enable access to the upper 128 byte bank of CMOS RAM. */ pci_write_config8(dev, RTC_CONF, 0x04); } static void i82801ax_lpc_route_dma(struct device *dev, uint8_t mask) { uint16_t reg16; int i; reg16 = pci_read_config16(dev, PCI_DMA_CFG); reg16 &= 0x300; for (i = 0; i < 8; i++) { if (i == 4) continue; reg16 |= ((mask & (1 << i)) ? 3 : 1) << (i * 2); } pci_write_config16(dev, PCI_DMA_CFG, reg16); } static void i82801ax_lpc_decode_en(device_t dev) { /* Decode 0x3F8-0x3FF (COM1) for COMA port, 0x2F8-0x2FF (COM2) for COMB. * LPT decode defaults to 0x378-0x37F and 0x778-0x77F. * Floppy decode defaults to 0x3F0-0x3F5, 0x3F7. * We also need to set the value for LPC I/F Enables Register. */ pci_write_config8(dev, COM_DEC, 0x10); pci_write_config16(dev, LPC_EN, 0x300F); } static void lpc_init(struct device *dev) { /* Set the value for PCI command register. */ pci_write_config16(dev, PCI_COMMAND, 0x000f); i82801ax_enable_acpi(dev); /* IO APIC initialization. */ i82801ax_enable_ioapic(dev); i82801ax_enable_serial_irqs(dev); /* Setup the PIRQ. */ i82801ax_pirq_init(dev); /* Setup power options. */ i82801ax_power_options(dev); /* Set the state of the GPIO lines. */ gpio_init(dev); /* Initialize the real time clock. */ i82801ax_rtc_init(dev); /* Route DMA. */ i82801ax_lpc_route_dma(dev, 0xff); /* Initialize ISA DMA. */ isa_dma_init(); /* Setup decode ports and LPC I/F enables. */ i82801ax_lpc_decode_en(dev); } static void i82801ax_lpc_read_resources(device_t dev) { struct resource *res; /* Get the normal PCI resources of this device. */ pci_dev_read_resources(dev); /* Add an extra subtractive resource for both memory and I/O. */ res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); res->base = 0; res->size = 0x1000; res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); res->base = 0xff800000; res->size = 0x00800000; /* 8 MB for flash */ res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; res = new_resource(dev, 3); /* IOAPIC */ res->base = IO_APIC_ADDR; res->size = 0x00001000; res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; } static struct device_operations lpc_ops = { .read_resources = i82801ax_lpc_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = lpc_init, .scan_bus = scan_lpc_bus, .enable = i82801ax_enable, }; /* 82801AA (ICH) */ static const struct pci_driver i82801aa_lpc __pci_driver = { .ops = &lpc_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = 0x2410, }; /* 82801AB (ICH0) */ static const struct pci_driver i82801ab_lpc __pci_driver = { .ops = &lpc_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = 0x2420, };