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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Tyan
* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
* Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <stdint.h>
#include <device/device.h>
#include <device/path.h>
#include <device/smbus.h>
struct bus *get_pbus_smbus(device_t dev)
{
struct bus *pbus = dev->bus;
while (pbus && pbus->dev && !ops_smbus_bus(pbus))
pbus = pbus->dev->bus;
if (!pbus || !pbus->dev || !pbus->dev->ops
|| !pbus->dev->ops->ops_smbus_bus) {
printk(BIOS_ALERT, "%s Cannot find SMBus bus operations",
dev_path(dev));
die("");
}
return pbus;
}
/*
* Multi-level I2C MUX? May need to find the first I2C device and then set link
* down to current dev.
*
* 1 store get_pbus_smbus list link
* 2 reverse the link and call set link.
*
* @param dev TODO.
*/
int smbus_set_link(device_t dev)
{
struct bus *pbus_a[4]; // 4 level mux only. Enough?
struct bus *pbus = dev->bus;
int pbus_num = 0;
int i;
while (pbus && pbus->dev && (pbus->dev->path.type == DEVICE_PATH_I2C)) {
pbus_a[pbus_num++] = pbus;
pbus = pbus->dev->bus;
}
// printk(BIOS_INFO, "smbus_set_link: ");
for (i = pbus_num - 1; i >= 0; i--) {
// printk(BIOS_INFO, " %s[%d] -> ", dev_path(pbus_a[i]->dev),
// pbus_a[i]->link);
if (ops_smbus_bus(get_pbus_smbus(pbus_a[i]->dev))) {
if (pbus_a[i]->dev->ops
&& pbus_a[i]->dev->ops->set_link)
pbus_a[i]->dev->ops->set_link(pbus_a[i]->dev,
pbus_a[i]->link_num);
}
}
// printk(BIOS_INFO, " %s\n", dev_path(dev));
return pbus_num;
}
int smbus_quick_read(device_t dev)
{
return ops_smbus_bus(get_pbus_smbus(dev))->quick_read(dev);
}
int smbus_quick_write(device_t dev)
{
return ops_smbus_bus(get_pbus_smbus(dev))->quick_write(dev);
}
int smbus_recv_byte(device_t dev)
{
return ops_smbus_bus(get_pbus_smbus(dev))->recv_byte(dev);
}
int smbus_send_byte(device_t dev, u8 byte)
{
return ops_smbus_bus(get_pbus_smbus(dev))->send_byte(dev, byte);
}
int smbus_read_byte(device_t dev, u8 addr)
{
return ops_smbus_bus(get_pbus_smbus(dev))->read_byte(dev, addr);
}
int smbus_write_byte(device_t dev, u8 addr, u8 val)
{
return ops_smbus_bus(get_pbus_smbus(dev))->write_byte(dev, addr, val);
}
int smbus_read_word(device_t dev, u8 addr)
{
return ops_smbus_bus(get_pbus_smbus(dev))->read_word(dev, addr);
}
int smbus_write_word(device_t dev, u8 addr, u16 val)
{
return ops_smbus_bus(get_pbus_smbus(dev))->write_word(dev, addr, val);
}
int smbus_process_call(device_t dev, u8 cmd, u16 data)
{
return ops_smbus_bus(get_pbus_smbus(dev))->process_call(dev, cmd, data);
}
int smbus_block_read(device_t dev, u8 cmd, u8 bytes, u8 *buffer)
{
return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd,
bytes, buffer);
}
int smbus_block_write(device_t dev, u8 cmd, u8 bytes, const u8 *buffer)
{
return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd,
bytes, buffer);
}
|
