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#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/hypertransport.h>
#include <device/pci_ids.h>
#include <stdlib.h>
#include <string.h>
#include <bitops.h>
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
#include "chip.h"
#include "northbridge.h"
/*
* This fixup is based on capturing values from an Award BIOS. Without
* this fixup the DMA write performance is awful (i.e. hdparm -t /dev/hda is 20x
* slower than normal, ethernet drops packets).
* Apparently these registers govern some sort of bus master behavior.
*/
static void northbridge_init(device_t dev)
{
device_t fb_dev;
unsigned long fb;
unsigned char c;
printk_debug("VT8623 random fixup ...\n");
pci_write_config8(dev, 0x0d, 0x08);
pci_write_config8(dev, 0x70, 0x82);
pci_write_config8(dev, 0x71, 0xc8);
pci_write_config8(dev, 0x72, 0x00);
pci_write_config8(dev, 0x73, 0x01);
pci_write_config8(dev, 0x74, 0x01);
pci_write_config8(dev, 0x75, 0x08);
pci_write_config8(dev, 0x76, 0x52);
pci_write_config8(dev, 0x13, 0xd0);
pci_write_config8(dev, 0x84, 0x80);
pci_write_config16(dev, 0x80, 0x610f);
pci_write_config32(dev, 0x88, 0x00000002);
fb_dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3122, 0);
if (fb_dev) {
/* Fixup GART and framebuffer addresses properly.
* First setup frame buffer properly.
*/
//fb = pci_read_config32(dev, 0x10); /* Base addres of framebuffer */
fb = 0xd0000000;
printk_debug("Frame buffer at %8x\n",fb);
c = pci_read_config8(dev, 0xe1) & 0xf0; /* size of vga */
c |= fb>>28; /* upper nibble of frame buffer address */
c = 0xdd;
pci_write_config8(dev, 0xe1, c);
c = 0x81; /* enable framebuffer */
pci_write_config8(dev, 0xe0, c);
pci_write_config8(dev, 0xe2, 0x42); /* 'cos award does */
}
}
static void nullfunc(){}
static struct device_operations northbridge_operations = {
.read_resources = nullfunc,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = northbridge_init
};
static const struct pci_driver northbridge_driver __pci_driver = {
.ops = &northbridge_operations,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_8623,
};
static void agp_init(device_t dev)
{
printk_debug("VT8623 AGP random fixup ...\n");
pci_write_config8(dev, 0x3e, 0x0c);
pci_write_config8(dev, 0x40, 0x83);
pci_write_config8(dev, 0x41, 0xc5);
pci_write_config8(dev, 0x43, 0x44);
pci_write_config8(dev, 0x44, 0x34);
pci_write_config8(dev, 0x83, 0x02);
}
static struct device_operations agp_operations = {
.read_resources = nullfunc,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = agp_init,
.scan_bus = pci_scan_bridge,
.ops_pci = 0,
};
static const struct pci_driver agp_driver __pci_driver = {
.ops = &agp_operations,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_8633_1,
};
static void vga_init(device_t dev)
{
// unsigned long fb;
msr_t clocks1,clocks2,instructions,setup;
printk_debug("VGA random fixup ...\n");
pci_write_config8(dev, 0x04, 0x07);
pci_write_config8(dev, 0x0d, 0x20);
pci_write_config32(dev,0x10,0xd8000008);
pci_write_config32(dev,0x14,0xdc000000);
// set up performnce counters for debugging vga init sequence
//setup.lo = 0x1c0; // count instructions
//wrmsr(0x187,setup);
//instructions.hi = 0;
//instructions.lo = 0;
//wrmsr(0xc2,instructions);
//clocks1 = rdmsr(0x10);
#if 0
/* code to make vga init go through the emulator - as of yet this does not workfor the epia-m */
dev->on_mainboard=1;
dev->rom_address = (void *)0xfffc0000;
pci_dev_init(dev);
call_bios_interrupt(0x10,0x4f1f,0x8003,1,0);
//clocks2 = rdmsr(0x10);
//instructions = rdmsr(0xc2);
printk_debug("Clocks 1 = %08x:%08x\n",clocks1.hi,clocks1.lo);
printk_debug("Clocks 2 = %08x:%08x\n",clocks2.hi,clocks2.lo);
printk_debug("Instructions = %08x:%08x\n",instructions.hi,instructions.lo);
#else
/* code to make vga init run in real mode - does work but against the current coreboot philosophy */
printk_debug("INSTALL REAL-MODE IDT\n");
setup_realmode_idt();
printk_debug("DO THE VGA BIOS\n");
do_vgabios();
//clocks2 = rdmsr(0x10);
//instructions = rdmsr(0xc2);
//printk_debug("Clocks 1 = %08x:%08x\n",clocks1.hi,clocks1.lo);
//printk_debug("Clocks 2 = %08x:%08x\n",clocks2.hi,clocks2.lo);
//printk_debug("Instructions = %08x:%08x\n",instructions.hi,instructions.lo);
vga_enable_console();
#endif
pci_write_config32(dev,0x30,0);
/* Set the vga mtrrs - disable for the moment as the add_var_mtrr function has vapourised */
#if 0
add_var_mtrr( 0xd0000000 >> 10, 0x08000000>>10, MTRR_TYPE_WRCOMB);
fb = pci_read_config32(dev,0x10); // get the fb address
add_var_mtrr( fb>>10, 8192, MTRR_TYPE_WRCOMB);
#endif
}
static void vga_read_resources(device_t dev)
{
dev->rom_address = (void *)0xfffc0000;
dev->on_mainboard=1;
pci_dev_read_resources(dev);
}
static struct device_operations vga_operations = {
.read_resources = vga_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = vga_init,
.ops_pci = 0,
};
static const struct pci_driver vga_driver __pci_driver = {
.ops = &vga_operations,
.vendor = PCI_VENDOR_ID_VIA,
.device = 0x3122,
};
#define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM)
static void pci_domain_read_resources(device_t dev)
{
struct resource *resource;
printk_spew("Entering vt8623 pci_domain_read_resources.\n");
/* Initialize the system wide io space constraints */
resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0));
resource->limit = 0xffffUL;
resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
IORESOURCE_ASSIGNED;
/* Initialize the system wide memory resources constraints */
resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1,0));
resource->limit = 0xffffffffULL;
resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
IORESOURCE_ASSIGNED;
printk_spew("Leaving vt8623 pci_domain_read_resources.\n");
}
static void ram_resource(device_t dev, unsigned long index,
unsigned long basek, unsigned long sizek)
{
struct resource *resource;
if (!sizek) {
return;
}
resource = new_resource(dev, index);
resource->base = ((resource_t)basek) << 10;
resource->size = ((resource_t)sizek) << 10;
resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \
IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
}
static void tolm_test(void *gp, struct device *dev, struct resource *new)
{
struct resource **best_p = gp;
struct resource *best;
best = *best_p;
if (!best || (best->base > new->base)) {
best = new;
}
*best_p = best;
}
static uint32_t find_pci_tolm(struct bus *bus)
{
struct resource *min;
uint32_t tolm;
min = 0;
search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min);
tolm = 0xffffffffUL;
if (min && tolm > min->base) {
tolm = min->base;
}
return tolm;
}
#if CONFIG_HAVE_HIGH_TABLES==1
/* maximum size of high tables in KB */
#define HIGH_TABLES_SIZE 64
extern uint64_t high_tables_base, high_tables_size;
#endif
static void pci_domain_set_resources(device_t dev)
{
static const uint8_t ramregs[] = {0x5a, 0x5b, 0x5c, 0x5d };
device_t mc_dev;
uint32_t pci_tolm;
printk_spew("Entering vt8623 pci_domain_set_resources.\n");
pci_tolm = find_pci_tolm(&dev->link[0]);
mc_dev = dev->link[0].children;
if (mc_dev) {
unsigned long tomk, tolmk;
unsigned char rambits;
int i, idx;
for(rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) {
unsigned char reg;
reg = pci_read_config8(mc_dev, ramregs[i]);
/* these are ENDING addresses, not sizes.
* if there is memory in this slot, then reg will be > rambits.
* So we just take the max, that gives us total.
* We take the highest one to cover for once and future coreboot
* bugs. We warn about bugs.
*/
if (reg > rambits)
rambits = reg;
if (reg < rambits)
printk_err("ERROR! register 0x%x is not set!\n",
ramregs[i]);
}
printk_debug("I would set ram size to 0x%x Kbytes\n", (rambits)*16*1024);
tomk = rambits*16*1024 - 32768;
/* Compute the top of Low memory */
tolmk = pci_tolm >> 10;
if (tolmk >= tomk) {
/* The PCI hole does does not overlap the memory.
*/
tolmk = tomk;
}
#if CONFIG_HAVE_HIGH_TABLES == 1
high_tables_base = (tolmk - HIGH_TABLES_SIZE) * 1024;
high_tables_size = HIGH_TABLES_SIZE* 1024;
printk_debug("tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n", tomk*1024, high_tables_base, high_tables_size);
#endif
/* Report the memory regions */
idx = 10;
ram_resource(dev, idx++, 0, 640); /* first 640k */
ram_resource(dev, idx++, 768, tolmk - 768); /* leave a hole for vga */
}
assign_resources(&dev->link[0]);
}
static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max)
{
printk_spew("Entering vt8623 pci_domain_scan_bus.\n");
max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max);
return max;
}
static struct device_operations pci_domain_ops = {
.read_resources = pci_domain_read_resources,
.set_resources = pci_domain_set_resources,
.enable_resources = enable_childrens_resources,
.init = 0,
.scan_bus = pci_domain_scan_bus,
};
static void cpu_bus_init(device_t dev)
{
initialize_cpus(&dev->link[0]);
}
static void cpu_bus_noop(device_t dev)
{
}
static struct device_operations cpu_bus_ops = {
.read_resources = cpu_bus_noop,
.set_resources = cpu_bus_noop,
.enable_resources = cpu_bus_noop,
.init = cpu_bus_init,
.scan_bus = 0,
};
static void enable_dev(struct device *dev)
{
printk_spew("In vt8623 enable_dev for device %s.\n", dev_path(dev));
/* Set the operations if it is a special bus type */
if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
dev->ops = &pci_domain_ops;
pci_set_method(dev);
}
else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
dev->ops = &cpu_bus_ops;
}
}
struct chip_operations northbridge_via_vt8623_ops = {
CHIP_NAME("VIA VT8623 Northbridge")
.enable_dev = enable_dev,
};
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