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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Intel Corporation.
* Copyright (C) 2019 3mdeb
* Copyright (C) 2019 Eltan B.V.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <soc/iomap.h>
#include <soc/pci_devs.h>
#include <device/pci_def.h>
#include <device/pci_type.h>
#include <device/pci_ops.h>
#include <device/smbus_host.h>
#include <soc/smbus.h>
int smbus_i2c_block_write(u8 addr, u8 bytes, u8 *buf)
{
#ifdef __SIMPLE_DEVICE__
pci_devfn_t dev = PCI_DEV(0, SMBUS_DEV, SMBUS_FUNC);
#else
struct device *dev = pcidev_on_root(SMBUS_DEV, SMBUS_FUNC);
#endif
u32 smbase;
u32 smb_ctrl_reg;
int status;
/* SMBus I/O BAR */
smbase = pci_read_config32(dev, PCI_BASE_ADDRESS_4) & 0xFFFFFFFE;
/* Enable I2C_EN bit in HOSTC register */
smb_ctrl_reg = pci_read_config32(dev, HOSTC);
pci_write_config32(dev, HOSTC, smb_ctrl_reg | HOSTC_I2C_EN);
status = do_i2c_block_write(smbase, addr, bytes, buf);
/* Restore I2C_EN bit */
pci_write_config32(dev, HOSTC, smb_ctrl_reg);
return status;
}
|
