path: root/src/southbridge/nvidia/ck804/ck804_lpc.c

/*
 * (C) 2003 Linux Networx, SuSE Linux AG
 * Copyright 2004 Tyan Computer
 *  by yhlu@tyan.com
 *  2006.1 yhlu add dest apicid for IRQ0
 */

#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pnp.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <pc80/mc146818rtc.h>
#include <pc80/isa-dma.h>
#include <bitops.h>
#include <arch/io.h>
#include <arch/ioapic.h>
#include <cpu/x86/lapic.h>
#include <stdlib.h>
#include "ck804.h"

#define CK804_CHIP_REV 2

#define NMI_OFF 0

// 0x7a or e3
#define PREVIOUS_POWER_STATE 0x7A

#define MAINBOARD_POWER_OFF 0
#define MAINBOARD_POWER_ON 1
#define SLOW_CPU_OFF 0
#define SLOW_CPU__ON 1

#ifndef CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL
#define CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL MAINBOARD_POWER_ON
#endif

static void lpc_common_init(device_t dev)
{
	uint8_t byte;
	uint32_t dword;

	/* I/O APIC initialization */
	byte = pci_read_config8(dev, 0x74);
	byte |= (1 << 0);	/* Enable APIC. */
	pci_write_config8(dev, 0x74, byte);
	dword = pci_read_config32(dev, PCI_BASE_ADDRESS_1);	/* 0x14 */

	setup_ioapic(dword, 0); // Don't rename IOAPIC ID

#if 1
	dword = pci_read_config32(dev, 0xe4);
	dword |= (1 << 23);
	pci_write_config32(dev, 0xe4, dword);
#endif
}

static void lpc_slave_init(device_t dev)
{
	lpc_common_init(dev);
}

static void rom_dummy_write(device_t dev)
{
	uint8_t old, new;
	uint8_t *p;

	old = pci_read_config8(dev, 0x88);
	new = old | 0xc0;
	if (new != old)
		pci_write_config8(dev, 0x88, new);
	/* Enable write. */
	old = pci_read_config8(dev, 0x6d);
	new = old | 0x01;
	if (new != old)
		pci_write_config8(dev, 0x6d, new);

	/* Dummy write. */
	p = (uint8_t *) 0xffffffe0;
	old = 0;
	*p = old;
	old = *p;

	/* Disable write. */
	old = pci_read_config8(dev, 0x6d);
	new = old & 0xfe;
	if (new != old)
		pci_write_config8(dev, 0x6d, new);
}

static void enable_hpet(struct device *dev)
{
	unsigned long hpet_address;

	pci_write_config32(dev, 0x44, 0xfed00001);
	hpet_address = pci_read_config32(dev, 0x44) & 0xfffffffe;
	printk(BIOS_DEBUG, "Enabling HPET @0x%lx\n", hpet_address);
}

unsigned pm_base=0;

static void lpc_init(device_t dev)
{
	uint8_t byte, byte_old;
	int on, nmi_option;

	lpc_common_init(dev);

	pm_base = pci_read_config32(dev, 0x60) & 0xff00;
	printk(BIOS_INFO, "%s: pm_base = %x \n", __func__, pm_base);

#if CK804_CHIP_REV==1
	if (dev->bus->secondary != 1)
		return;
#endif

#if 0
	/* Posted memory write enable */
	byte = pci_read_config8(dev, 0x46);
	pci_write_config8(dev, 0x46, byte | (1 << 0));
#endif

	/* power after power fail */
	on = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
	get_option(&on, "power_on_after_fail");
	byte = pci_read_config8(dev, PREVIOUS_POWER_STATE);
	byte &= ~0x40;
	if (!on)
		byte |= 0x40;
	pci_write_config8(dev, PREVIOUS_POWER_STATE, byte);
	printk(BIOS_INFO, "set power %s after power fail\n", on ? "on" : "off");

	/* Throttle the CPU speed down for testing. */
	on = SLOW_CPU_OFF;
	get_option(&on, "slow_cpu");
	if (on) {
		uint16_t pm10_bar;
		uint32_t dword;
		pm10_bar = (pci_read_config16(dev, 0x60) & 0xff00);
		outl(((on << 1) + 0x10), (pm10_bar + 0x10));
		dword = inl(pm10_bar + 0x10);
		on = 8 - on;
		printk(BIOS_DEBUG, "Throttling CPU %2d.%1.1d percent.\n",
			     (on * 12) + (on >> 1), (on & 1) * 5);
	}
#if 0
// default is enabled
	/* Enable Port 92 fast reset. */
	byte = pci_read_config8(dev, 0xe8);
	byte |= ~(1 << 3);
	pci_write_config8(dev, 0xe8, byte);
#endif

	/* Enable Error reporting. */
	/* Set up sync flood detected. */
	byte = pci_read_config8(dev, 0x47);
	byte |= (1 << 1);
	pci_write_config8(dev, 0x47, byte);

	/* Set up NMI on errors. */
	byte = inb(0x70);		/* RTC70 */
	byte_old = byte;
	nmi_option = NMI_OFF;
	get_option(&nmi_option, "nmi");
	if (nmi_option) {
		byte &= ~(1 << 7); /* Set NMI. */
	} else {
		byte |= (1 << 7); /* Can't mask NMI from PCI-E and NMI_NOW. */
	}
	if (byte != byte_old)
		outb(byte, 0x70);

	/* Initialize the real time clock (RTC). */
	rtc_init(0);

	/* Initialize ISA DMA. */
	isa_dma_init();

	/* Initialize the High Precision Event Timers (HPET). */
	enable_hpet(dev);

	rom_dummy_write(dev);
}

static void ck804_lpc_read_resources(device_t dev)
{
	struct resource *res;
	unsigned long index;

	/* Get the normal PCI resources of this device. */
	/* We got one for APIC, or one more for TRAP. */
	pci_dev_read_resources(dev);

	/* Get resource for ACPI, SYSTEM_CONTROL, ANALOG_CONTROL. */
	for (index = 0x60; index <= 0x68; index += 4)	/* We got another 3. */
		pci_get_resource(dev, index);
	compact_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;
}

/**
 * Enable resources for children devices.
 *
 * This function is called by the global enable_resources() indirectly via the
 * device_operation::enable_resources() method of devices.
 *
 */
static void ck804_lpc_enable_childrens_resources(device_t dev)
{
	struct bus *link;
	uint32_t reg, reg_var[4];
	int i, var_num = 0;

	reg = pci_read_config32(dev, 0xa0);

	for (link = dev->link_list; link; link = link->next) {
		device_t child;
		for (child = link->children; child; child = child->sibling) {
			if (child->enabled && (child->path.type == DEVICE_PATH_PNP)) {
				struct resource *res;
				for (res = child->resource_list; res; res = res->next) {
					unsigned long base, end;	// don't need long long
					if (!(res->flags & IORESOURCE_IO))
						continue;
					base = res->base;
					end = resource_end(res);
					printk(BIOS_DEBUG, "ck804 lpc decode:%s, base=0x%08lx, end=0x%08lx\n", dev_path(child), base, end);
					switch (base) {
					case 0x3f8:	// COM1
						reg |= (1 << 0);
						break;
					case 0x2f8:	// COM2
						reg |= (1 << 1);
						break;
					case 0x378:	// Parallel 1
						reg |= (1 << 24);
						break;
					case 0x3f0:	// FD0
						reg |= (1 << 20);
						break;
					case 0x220:	// Audio 0
						reg |= (1 << 8);
						break;
					case 0x300:	// Midi 0
						reg |= (1 << 12);
						break;
					}
					if (base == 0x290 || base >= 0x400) {
						if (var_num >= 4)
							continue;	// only 4 var ; compact them ?
						reg |= (1 << (28 + var_num));
						reg_var[var_num++] = (base & 0xffff) | ((end & 0xffff) << 16);
					}
				}
			}
		}
	}
	pci_write_config32(dev, 0xa0, reg);
	for (i = 0; i < var_num; i++)
		pci_write_config32(dev, 0xa8 + i * 4, reg_var[i]);
}

static void ck804_lpc_enable_resources(device_t dev)
{
	pci_dev_enable_resources(dev);
	ck804_lpc_enable_childrens_resources(dev);
}

static void lpci_set_subsystem(device_t dev, unsigned vendor, unsigned device)
{
	pci_write_config32(dev, 0x40,
			   ((device & 0xffff) << 16) | (vendor & 0xffff));
}

static struct pci_operations lops_pci = {
	.set_subsystem = lpci_set_subsystem,
};

static struct device_operations lpc_ops = {
	.read_resources   = ck804_lpc_read_resources,
	.set_resources    = pci_dev_set_resources,
	.enable_resources = ck804_lpc_enable_resources,
	.init             = lpc_init,
	.scan_bus         = scan_static_bus,
	// .enable        = ck804_enable,
	.ops_pci          = &lops_pci,
};

static const struct pci_driver lpc_driver __pci_driver = {
	.ops    = &lpc_ops,
	.vendor = PCI_VENDOR_ID_NVIDIA,
	.device = PCI_DEVICE_ID_NVIDIA_CK804_LPC,
};

static const struct pci_driver lpc_driver_pro __pci_driver = {
	.ops    = &lpc_ops,
	.vendor = PCI_VENDOR_ID_NVIDIA,
	.device = PCI_DEVICE_ID_NVIDIA_CK804_PRO,
};

#if CK804_CHIP_REV == 1
static const struct pci_driver lpc_driver_slave __pci_driver = {
	.ops    = &lpc_ops,
	.vendor = PCI_VENDOR_ID_NVIDIA,
	.device = PCI_DEVICE_ID_NVIDIA_CK804_SLAVE,
};
#else
static struct device_operations lpc_slave_ops = {
	.read_resources   = ck804_lpc_read_resources,
	.set_resources    = pci_dev_set_resources,
	.enable_resources = pci_dev_enable_resources,
	.init             = lpc_slave_init,
	// .enable        = ck804_enable,
	.ops_pci          = &lops_pci,
};

static const struct pci_driver lpc_driver_slave __pci_driver = {
	.ops    = &lpc_slave_ops,
	.vendor = PCI_VENDOR_ID_NVIDIA,
	.device = PCI_DEVICE_ID_NVIDIA_CK804_SLAVE,
};
#endif