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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2003 Linux Networx
* Copyright (C) 2004 SuSE Linux AG
* Copyright (C) 2004 Tyan Computer
* Copyright (C) 2010 Joseph Smith <joe@settoplinux.org>
*
* 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; version 2 of
* the License.
*
* 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 <device/pci_ops.h>
#include <pc80/mc146818rtc.h>
#include <pc80/isa-dma.h>
#include <arch/io.h>
#include "i82801dx.h"
#define NMI_OFF 0
typedef struct southbridge_intel_i82801dx_config config_t;
static void i82801dx_enable_ioapic(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 and power management. */
pci_write_config8(dev, ACPI_CNTL, 0x10);
reg32 = pci_read_config32(dev, GEN_CNTL);
reg32 |= (3 << 7); /* Enable IOAPIC */
reg32 |= (1 << 13); /* Coprocessor error enable */
reg32 |= (1 << 1); /* Delayed transaction enable */
reg32 |= (1 << 2); /* DMA collection buffer enable */
pci_write_config32(dev, GEN_CNTL, reg32);
printk_debug("IOAPIC Southbridge enabled %x\n", reg32);
*ioapic_index = 0;
*ioapic_data = (1 << 25);
*ioapic_index = 0;
reg32 = *ioapic_data;
printk_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 i82801dx_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));
}
static void i82801dx_pirq_init(device_t dev)
{
/* Get the chip configuration */
config_t *config = dev->chip_info;
pci_write_config8(dev, PIRQA_ROUT, config->pirqa_routing);
pci_write_config8(dev, PIRQB_ROUT, config->pirqb_routing);
pci_write_config8(dev, PIRQC_ROUT, config->pirqc_routing);
pci_write_config8(dev, PIRQD_ROUT, config->pirqd_routing);
pci_write_config8(dev, PIRQE_ROUT, config->pirqe_routing);
pci_write_config8(dev, PIRQF_ROUT, config->pirqf_routing);
pci_write_config8(dev, PIRQG_ROUT, config->pirqg_routing);
pci_write_config8(dev, PIRQH_ROUT, config->pirqh_routing);
}
static void i82801dx_power_options(device_t dev)
{
u8 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_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)
{
/* This should be done in romstage.c already */
pci_write_config32(dev, GPIO_BASE, (GPIOBASE_ADDR | 1));
pci_write_config8(dev, GPIO_CNTL, 0x10);
}
static void i82801dx_rtc_init(struct device *dev)
{
u8 reg8;
u32 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_STS);
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 i82801dx_lpc_route_dma(struct device *dev, u8 mask)
{
u16 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 i82801dx_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 enable_hpet(struct device *dev)
{
u32 reg32;
u32 code = (0 & 0x3);
reg32 = pci_read_config32(dev, GEN_CNTL);
reg32 |= (1 << 17); /* Enable HPET. */
/*
* Bits [16:15] Memory Address Range
* 00 FED0_0000h - FED0_03FFh
* 01 FED0_1000h - FED0_13FFh
* 10 FED0_2000h - FED0_23FFh
* 11 FED0_3000h - FED0_33FFh
*/
reg32 &= ~(3 << 15); /* Clear it */
reg32 |= (code << 15);
pci_write_config32(dev, GEN_CNTL, reg32);
printk_debug("Enabling HPET @0x%x\n", HPET_ADDR | (code << 12));
}
static void lpc_init(struct device *dev)
{
/* Set the value for PCI command register. */
pci_write_config16(dev, PCI_COMMAND, 0x000f);
/* IO APIC initialization. */
i82801dx_enable_ioapic(dev);
i82801dx_enable_serial_irqs(dev);
/* Setup the PIRQ. */
i82801dx_pirq_init(dev);
/* Setup power options. */
i82801dx_power_options(dev);
/* Set the state of the GPIO lines. */
gpio_init(dev);
/* Initialize the real time clock. */
i82801dx_rtc_init(dev);
/* Route DMA. */
i82801dx_lpc_route_dma(dev, 0xff);
/* Initialize ISA DMA. */
isa_dma_init();
/* Setup decode ports and LPC I/F enables. */
i82801dx_lpc_decode_en(dev);
/* Initialize the High Precision Event Timers */
enable_hpet(dev);
}
static void i82801dx_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 = 0xfec00000;
res->size = 0x00001000;
res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
}
static void i82801dx_lpc_enable_resources(device_t dev)
{
pci_dev_enable_resources(dev);
enable_childrens_resources(dev);
}
static struct device_operations lpc_ops = {
.read_resources = i82801dx_lpc_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = i82801dx_lpc_enable_resources,
.init = lpc_init,
.scan_bus = scan_static_bus,
.enable = i82801dx_enable,
};
/* 82801DB/DBL */
static const struct pci_driver lpc_driver_db __pci_driver = {
.ops = &lpc_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_82801DB_LPC,
};
/* 82801DBM */
static const struct pci_driver lpc_driver_dbm __pci_driver = {
.ops = &lpc_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_82801DBM_LPC,
};
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