summaryrefslogtreecommitdiff
path: root/src/southbridge/amd/amd8131/amd8131_bridge.c
blob: ded548023421c63ef9e726e5ef5d5733d311260d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
/*
 * (C) 2003 Linux Networx
 */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>

static void pcix_init(device_t dev)
{
	uint16_t word;
	uint8_t byte;

	
	/* Enable memory write and invalidate ??? */
	byte = pci_read_config8(dev, 0x04);
        byte |= 0x10;
        pci_write_config8(dev, 0x04, byte);
	
	/* Set drive strength */
	word = pci_read_config16(dev, 0xe0);
        word = 0x0404;
        pci_write_config16(dev, 0xe0, word);
	word = pci_read_config16(dev, 0xe4);
        word = 0x0404;
        pci_write_config16(dev, 0xe4, word);
	
	/* Set impedance */
	word = pci_read_config16(dev, 0xe8);
        word = 0x0404;
        pci_write_config16(dev, 0xe8, word);

	return;
}

static struct device_operations pcix_ops  = {
        .read_resources = pci_bus_read_resources,
        .set_resources = pci_dev_set_resources,
        .init = pcix_init,
        .scan_bus = pci_scan_bridge,
};

static struct pci_driver pcix_driver __pci_driver = {
        .ops    = &pcix_ops,
        .vendor = PCI_VENDOR_ID_AMD,
        .device = 0x7450,
};


static void ioapic_enable(device_t dev)
{
	uint32_t value;
	value = pci_read_config32(dev, 0x44);
	if (dev->enable) {
		value |= ((1 << 1) | (1 << 0));
	} else {
		value &= ~((1 << 1) | (1 << 0));
	}
	pci_write_config32(dev, 0x44, value);
}

static struct device_operations ioapic_ops = {
	.read_resources = pci_dev_read_resources,
	.set_resources  = pci_dev_set_resources,
	.init     = 0,
	.scan_bus = 0,
	.enable   = ioapic_enable,
};

static struct pci_driver ioapic_driver __pci_driver = {
	.ops    = &ioapic_ops,
	.vendor = PCI_VENDOR_ID_AMD,
	.device = 0x7451,
	
};