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-rw-r--r--src/southbridge/intel/i82801ax/lpc.c296
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diff --git a/src/southbridge/intel/i82801ax/lpc.c b/src/southbridge/intel/i82801ax/lpc.c
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+++ b/src/southbridge/intel/i82801ax/lpc.c
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+/*
+ * 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,
+};