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/*
* Copyright 2003 Tyan
*
* Author: Yinghai Lu
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
static void agp3bridge_init(device_t dev)
{
uint8_t byte;
/* Enable BM and IO */
byte = pci_read_config32(dev, 0x04);
byte |= 0x07;
pci_write_config8(dev, 0x04, byte);
/* Eable VGA/ISA decoding */
byte = pci_read_config32(dev, 0x3e);
byte |= 3<<2;
pci_write_config8(dev, 0x3e, byte);
return;
}
static struct device_operations agp3bridge_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = agp3bridge_init,
.scan_bus = pci_scan_bridge,
};
static struct pci_driver agp3bridge_driver __pci_driver = {
.ops = &agp3bridge_ops,
.vendor = PCI_VENDOR_ID_AMD,
.device = 0x7455, // AGP Bridge
};
static void agp3dev_enable(device_t dev)
{
uint32_t value;
// AGP enable
value = pci_read_config32(dev, 0xa8);
value |= (3<<8)|2; //AGP 8x
pci_write_config32(dev, 0xa8, value);
/*
// linkA 8bit-->16bit
value = pci_read_config32(dev, 0xc4);
value |= (0x11<<24);
pci_write_config32(dev, 0xc4, value);
// linkA 200-->600
value = pci_read_config32(dev, 0xcc);
value |= (4<<8);
pci_write_config32(dev, 0xcc, value);
*/
value = pci_read_config32(dev, 0x4);
value |= 6;
pci_write_config32(dev, 0x4, value);
}
static struct device_operations agp3dev_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = 0,
.scan_bus = 0,
.enable = agp3dev_enable,
};
static struct pci_driver agp3dev_driver __pci_driver = {
.ops = &agp3dev_ops,
.vendor = PCI_VENDOR_ID_AMD,
.device = 0x7454, //AGP Device
};
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