diff options
Diffstat (limited to 'src/southbridge/intel/i82801ax/lpc.c')
| -rw-r--r-- | src/southbridge/intel/i82801ax/lpc.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801ax/lpc.c b/src/southbridge/intel/i82801ax/lpc.c new file mode 100644 index 0000000000..c9404ed3c0 --- /dev/null +++ b/src/southbridge/intel/i82801ax/lpc.c @@ -0,0 +1,296 @@ +/* + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#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. + */ +static void i82801ax_enable_apic(struct device *dev) +{ + u32 reg32; + volatile u32 *ioapic_index = (volatile u32 *)IO_APIC_ADDR; + volatile u32 *ioapic_data = (volatile u32 *)(IO_APIC_ADDR + 0x10); + + /* 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); + + 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); + + *ioapic_index = 0; + *ioapic_data = (1 << 25); + + *ioapic_index = 0; + reg32 = *ioapic_data; + printk(BIOS_DEBUG, "Southbridge APIC ID = %x\n", reg32); + if (reg32 != (1 << 25)) + die("APIC Error\n"); + + /* TODO: From i82801ca, needed/useful on other ICH? */ + *ioapic_index = 3; /* Select Boot Configuration register. */ + *ioapic_data = 1; /* Use Processor System Bus to deliver interrupts. */ +} + +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); + rtc_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); + + /* IO APIC initialization. */ + i82801ax_enable_apic(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_static_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, +}; |