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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2009 coresystems GmbH
*
* 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.
*/
#include <arch/io.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include <pc80/mc146818rtc.h>
#include <pc80/i8259.h>
#include <pc80/keyboard.h>
#include <pc80/isa-dma.h>
#include <cpu/x86/lapic.h>
#include <arch/ioapic.h>
#include <stdlib.h>
#define ACPI_IO_BASE 0x400
static const unsigned char pci_irqs[4] = { 11, 11, 10, 10 };
static const unsigned char usb_pins[4] = { 'A', 'B', 'C', 'D' };
static const unsigned char vga_pins[4] = { 'A', 'B', 'C', 'D' };
static const unsigned char slot_pins[4] = { 'B', 'C', 'D', 'A' };
static const unsigned char ac97_pins[4] = { 'B', 'C', 'D', 'A' };
static unsigned char *pin_to_irq(const unsigned char *pin)
{
static unsigned char irqs[4];
int i;
for (i = 0; i < 4; i++)
irqs[i] = pci_irqs[pin[i] - 'A'];
return irqs;
}
static void pci_routing_fixup(struct device *dev)
{
printk(BIOS_DEBUG, "%s: device is %p\n", __FUNCTION__, dev);
/* set up PCI IRQ routing */
pci_write_config8(dev, 0x55, pci_irqs[0] << 4);
pci_write_config8(dev, 0x56, pci_irqs[1] | (pci_irqs[2] << 4));
pci_write_config8(dev, 0x57, pci_irqs[3] << 4);
/* Assigning IRQs */
printk(BIOS_DEBUG, "Setting up USB interrupts.\n");
pci_assign_irqs(0, 0x10, pin_to_irq(usb_pins));
printk(BIOS_DEBUG, "Setting up VGA interrupts.\n");
pci_assign_irqs(1, 0x00, pin_to_irq(vga_pins));
printk(BIOS_DEBUG, "Setting up PCI slot interrupts.\n");
pci_assign_irqs(2, 0x04, pin_to_irq(slot_pins));
// more?
printk(BIOS_DEBUG, "Setting up AC97 interrupts.\n");
pci_assign_irqs(0x80, 0x1, pin_to_irq(ac97_pins));
}
/*
* Set up the power management capabilities directly into ACPI mode. This
* avoids having to handle any System Management Interrupts (SMI's) which I
* can't figure out how to do !!!!
*/
static void setup_pm(device_t dev)
{
/* Debounce LID and PWRBTN# Inputs for 16ms. */
pci_write_config8(dev, 0x80, 0x20);
/* Set ACPI base address to IO ACPI_IO_BASE */
pci_write_config16(dev, 0x88, ACPI_IO_BASE | 1);
/* set ACPI irq to 9 */
pci_write_config8(dev, 0x82, 0x49);
/* Primary interupt channel, define wake events 0 = IRQ0 15 = IRQ15 1 = en. */
pci_write_config16(dev, 0x84, 0x609a);
/* SMI output level to low, 7.5us throttle clock */
pci_write_config8(dev, 0x8d, 0x18);
/* GP Timer Control 1s */
pci_write_config8(dev, 0x93, 0x88);
/* Power Well */
pci_write_config8(dev, 0x94, 0x20); // 0x20??
/* 7 = stp to sust delay 1msec
* 6 = SUSST# Deasserted Before PWRGD for STD
*/
pci_write_config8(dev, 0x95, 0xc0); // 0xc1??
/* Disable GP2 & GP3 Timer */
pci_write_config8(dev, 0x98, 0);
/* GP2 Timer Counter */
pci_write_config8(dev, 0x99, 0xfb);
/* GP3 Timer Counter */
/* Multi Function Select 1 */
pci_write_config8(dev, 0xe4, 0x00);
/* Multi Function Select 2 */
pci_write_config8(dev, 0xe5, 0x41); //??
/* Enable ACPI access (and setup like award) */
pci_write_config8(dev, 0x81, 0x84);
/* Clear status events. */
outw(0xffff, ACPI_IO_BASE + 0x00);
outw(0xffff, ACPI_IO_BASE + 0x20);
outw(0xffff, ACPI_IO_BASE + 0x28);
outl(0xffffffff, ACPI_IO_BASE + 0x30);
/* Disable SCI on GPIO. */
outw(0x0, ACPI_IO_BASE + 0x22);
/* Disable SMI on GPIO. */
outw(0x0, ACPI_IO_BASE + 0x24);
/* Disable all global enable SMIs. */
outw(0x0, ACPI_IO_BASE + 0x2a);
/* All SMI off, both IDE buses ON, PSON rising edge. */
outw(0x0, ACPI_IO_BASE + 0x2c);
/* Primary activity SMI disable. */
outl(0x0, ACPI_IO_BASE + 0x34);
/* GP timer reload on none. */
outl(0x0, ACPI_IO_BASE + 0x38);
/* Disable extended IO traps. */
outb(0x0, ACPI_IO_BASE + 0x42);
/* SCI is generated for RTC/pwrBtn/slpBtn. */
outw(0x0001, ACPI_IO_BASE + 0x04);
/* Allow SLP# signal to assert LDTSTOP_L.
* Will work for C3 and for FID/VID change.
*/
outb(0x1, ACPI_IO_BASE + 0x11);
}
static void cx700_set_lpc_registers(struct device *dev)
{
unsigned char enables;
printk(BIOS_DEBUG, "VIA CX700 LPC bridge init\n");
// enable the internal I/O decode
enables = pci_read_config8(dev, 0x6C);
enables |= 0x80;
pci_write_config8(dev, 0x6C, enables);
// Map 4MB of FLASH into the address space
// Set bit 6 of 0x40, because Award does it (IO recovery time)
// IMPORTANT FIX - EISA 0x4d0 decoding must be on so that PCI
// interrupts can be properly marked as level triggered.
enables = pci_read_config8(dev, 0x40);
enables |= 0x44;
pci_write_config8(dev, 0x40, enables);
/* DMA Line buffer control */
enables = pci_read_config8(dev, 0x42);
enables |= 0xf0;
pci_write_config8(dev, 0x42, enables);
/* I/O recovery time */
pci_write_config8(dev, 0x4c, 0x44);
/* ROM memory cycles go to LPC. */
pci_write_config8(dev, 0x59, 0x80);
/* Enable SM dynamic clock gating */
pci_write_config8(dev, 0x5b, 0x01);
/* Set Read Pass Write Control Enable */
pci_write_config8(dev, 0x48, 0x0c);
/* Set SM Misc Control: Enable Internal APIC . */
enables = pci_read_config8(dev, 0x58);
enables |= 1 << 6;
pci_write_config8(dev, 0x58, enables);
enables = pci_read_config8(dev, 0x4d);
enables |= 1 << 3;
pci_write_config8(dev, 0x4d, enables);
/* Set bit 3 of 0x4f to match award (use INIT# as CPU reset) */
enables = pci_read_config8(dev, 0x4f);
enables |= 0x08;
pci_write_config8(dev, 0x4f, enables);
/* enable KBC configuration */
pci_write_config8(dev, 0x51, 0x1f);
/* enable serial irq */
pci_write_config8(dev, 0x52, 0x9);
/* dma */
pci_write_config8(dev, 0x53, 0x00);
// Power management setup
setup_pm(dev);
/* set up isa bus -- i/o recovery time, ROM write enable, extend-ale */
pci_write_config8(dev, 0x40, 0x54);
/* Enable HPET timer */
pci_write_config32(dev, 0x68, (1 << 31) | (CONFIG_HPET_ADDRESS >> 8));
}
static void cx700_read_resources(device_t dev)
{
struct resource *res;
/* Make sure we call our childrens set/enable functions - these
* are not called unless this device has a resource to set.
*/
pci_dev_read_resources(dev);
res = new_resource(dev, 1);
res->base = 0x0UL;
res->size = 0x400UL;
res->limit = 0xffffUL;
res->flags = IORESOURCE_IO | 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 void cx700_set_resources(device_t dev)
{
struct resource *resource;
resource = find_resource(dev, 1);
resource->flags |= IORESOURCE_STORED;
pci_dev_set_resources(dev);
}
static void cx700_enable_resources(device_t dev)
{
/* Enable SuperIO decoding */
pci_dev_enable_resources(dev);
}
static void cx700_lpc_init(struct device *dev)
{
cx700_set_lpc_registers(dev);
#if IS_ENABLED(CONFIG_IOAPIC)
#define IO_APIC_ID 2
setup_ioapic(VIO_APIC_VADDR, IO_APIC_ID);
#endif
/* Initialize interrupts */
pci_routing_fixup(dev);
/* make sure interupt controller is configured before keyboard init */
setup_i8259();
/* Start the Real Time Clock */
cmos_init(0);
/* Initialize isa dma */
isa_dma_init();
/* Initialize keyboard controller */
pc_keyboard_init(NO_AUX_DEVICE);
}
static struct device_operations cx700_lpc_ops = {
.read_resources = cx700_read_resources,
.set_resources = cx700_set_resources,
.enable_resources = cx700_enable_resources,
.init = cx700_lpc_init,
.scan_bus = scan_lpc_bus,
};
static const struct pci_driver lpc_driver __pci_driver = {
.ops = &cx700_lpc_ops,
.vendor = PCI_VENDOR_ID_VIA,
.device = 0x8324,
};
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