diff options
Diffstat (limited to 'src/northbridge/via/cx700/lpc.c')
| -rw-r--r-- | src/northbridge/via/cx700/lpc.c | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/src/northbridge/via/cx700/lpc.c b/src/northbridge/via/cx700/lpc.c new file mode 100644 index 0000000000..77ab97c145 --- /dev/null +++ b/src/northbridge/via/cx700/lpc.c @@ -0,0 +1,308 @@ +/* + * 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. + * + * 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 <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 +#define HPET_ADDR 0xfe800000UL + +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 */ + //pci_write_config8(dev, 0x9a, 0x20); + + /* 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 +// pci_write_config8(dev, 0x41, 0x7f); + + // 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) | (HPET_ADDR >> 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 CONFIG_IOAPIC +#define IO_APIC_ID 2 + setup_ioapic(IO_APIC_ADDR, 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 */ + rtc_init(0); + + /* Initialize isa dma */ + isa_dma_init(); + + /* Initialize keyboard controller */ + pc_keyboard_init(0); +} + +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_static_bus, +}; + +static const struct pci_driver lpc_driver __pci_driver = { + .ops = &cx700_lpc_ops, + .vendor = PCI_VENDOR_ID_VIA, + .device = 0x8324, +}; |