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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <device/smbus_host.h>
#include "pch.h"
uintptr_t smbus_base(void)
{
return SMBUS_IO_BASE;
}
int smbus_enable_iobar(uintptr_t base)
{
/* Set the SMBus device statically. */
pci_devfn_t dev = PCI_DEV(0x0, 0x1f, 0x3);
/* Check to make sure we've got the right device. */
if (pci_read_config16(dev, PCI_VENDOR_ID) != PCI_VENDOR_ID_INTEL)
return -1;
/* Set SMBus I/O base. */
pci_write_config32(dev, SMB_BASE,
base | PCI_BASE_ADDRESS_SPACE_IO);
/* Set SMBus enable. */
pci_write_config8(dev, HOSTC, HST_EN);
/* Set SMBus I/O space enable. */
pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
return 0;
}
int smbus_read_byte(unsigned int device, unsigned int address)
{
return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}
int smbus_write_byte(unsigned int device, unsigned int address, u8 data)
{
return do_smbus_write_byte(SMBUS_IO_BASE, device, address, data);
}
int smbus_block_read(unsigned int device, unsigned int cmd, u8 bytes, u8 *buf)
{
return do_smbus_block_read(SMBUS_IO_BASE, device, cmd, bytes, buf);
}
int smbus_block_write(unsigned int device, unsigned int cmd, u8 bytes, const u8 *buf)
{
return do_smbus_block_write(SMBUS_IO_BASE, device, cmd, bytes, buf);
}
|
