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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "pch.h"
static void pci_init(struct device *dev)
{
u16 reg16;
printk(BIOS_DEBUG, "PCI init.\n");
/* Enable Bus Master */
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
/* This device has no interrupt */
pci_write_config8(dev, INTR, 0xff);
/* disable parity error response and SERR */
pci_and_config16(dev, PCI_BRIDGE_CONTROL,
~(PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR));
/* Master Latency Count must be set to 0x04! */
pci_update_config8(dev, SMLT, 0x07, (0x04 << 3));
/* Clear errors in status registers. FIXME: do we need to do something? */
reg16 = pci_read_config16(dev, PSTS);
//reg16 |= 0xf900;
pci_write_config16(dev, PSTS, reg16);
reg16 = pci_read_config16(dev, SECSTS);
// reg16 |= 0xf900;
pci_write_config16(dev, SECSTS, reg16);
}
static struct device_operations device_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = pci_init,
.scan_bus = pci_scan_bridge,
.ops_pci = &pci_dev_ops_pci,
};
static const unsigned short pci_device_ids[] = {
0x2448, /* Mobile */
0x244e, /* Desktop */
0
};
static const struct pci_driver pch_pci __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VID_INTEL,
.devices = pci_device_ids,
};
|
