| /* |
| * 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. |
| */ |
| |
| #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, |
| }; |