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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
* AMD Geode southbridge support code
* Copyright (C) 2006, Advanced Micro Devices, Inc.
* Copyright (C) 2007, Andres Salomon <dilinger@debian.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <asm/msr.h>
#include <asm/geode.h>
static struct {
char *name;
u32 msr;
int size;
u32 base;
} lbars[] = {
{ "geode-pms", MSR_LBAR_PMS, LBAR_PMS_SIZE, 0 },
{ "geode-acpi", MSR_LBAR_ACPI, LBAR_ACPI_SIZE, 0 },
{ "geode-gpio", MSR_LBAR_GPIO, LBAR_GPIO_SIZE, 0 },
{ "geode-mfgpt", MSR_LBAR_MFGPT, LBAR_MFGPT_SIZE, 0 }
};
static void __init init_lbars(void)
{
u32 lo, hi;
int i;
for (i = 0; i < ARRAY_SIZE(lbars); i++) {
rdmsr(lbars[i].msr, lo, hi);
if (hi & 0x01)
lbars[i].base = lo & 0x0000ffff;
if (lbars[i].base == 0)
printk(KERN_ERR "geode: Couldn't initialize '%s'\n",
lbars[i].name);
}
}
int geode_get_dev_base(unsigned int dev)
{
BUG_ON(dev >= ARRAY_SIZE(lbars));
return lbars[dev].base;
}
EXPORT_SYMBOL_GPL(geode_get_dev_base);
/* === GPIO API === */
void geode_gpio_set(u32 gpio, unsigned int reg)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
if (!base)
return;
/* low bank register */
if (gpio & 0xFFFF)
outl(gpio & 0xFFFF, base + reg);
/* high bank register */
gpio >>= 16;
if (gpio)
outl(gpio, base + 0x80 + reg);
}
EXPORT_SYMBOL_GPL(geode_gpio_set);
void geode_gpio_clear(u32 gpio, unsigned int reg)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
if (!base)
return;
/* low bank register */
if (gpio & 0xFFFF)
outl((gpio & 0xFFFF) << 16, base + reg);
/* high bank register */
gpio &= (0xFFFF << 16);
if (gpio)
outl(gpio, base + 0x80 + reg);
}
EXPORT_SYMBOL_GPL(geode_gpio_clear);
int geode_gpio_isset(u32 gpio, unsigned int reg)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
u32 val;
if (!base)
return 0;
/* low bank register */
if (gpio & 0xFFFF) {
val = inl(base + reg) & (gpio & 0xFFFF);
if ((gpio & 0xFFFF) == val)
return 1;
}
/* high bank register */
gpio >>= 16;
if (gpio) {
val = inl(base + 0x80 + reg) & gpio;
if (gpio == val)
return 1;
}
return 0;
}
EXPORT_SYMBOL_GPL(geode_gpio_isset);
void geode_gpio_set_irq(unsigned int group, unsigned int irq)
{
u32 lo, hi;
if (group > 7 || irq > 15)
return;
rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
lo &= ~(0xF << (group * 4));
lo |= (irq & 0xF) << (group * 4);
wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
}
EXPORT_SYMBOL_GPL(geode_gpio_set_irq);
void geode_gpio_setup_event(unsigned int gpio, int pair, int pme)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
u32 offset, shift, val;
if (gpio >= 24)
offset = GPIO_MAP_W;
else if (gpio >= 16)
offset = GPIO_MAP_Z;
else if (gpio >= 8)
offset = GPIO_MAP_Y;
else
offset = GPIO_MAP_X;
shift = (gpio % 8) * 4;
val = inl(base + offset);
/* Clear whatever was there before */
val &= ~(0xF << shift);
/* And set the new value */
val |= ((pair & 7) << shift);
/* Set the PME bit if this is a PME event */
if (pme)
val |= (1 << (shift + 3));
outl(val, base + offset);
}
EXPORT_SYMBOL_GPL(geode_gpio_setup_event);
int geode_has_vsa2(void)
{
static int has_vsa2 = -1;
if (has_vsa2 == -1) {
u16 val;
/*
* The VSA has virtual registers that we can query for a
* signature.
*/
outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
val = inw(VSA_VRC_DATA);
has_vsa2 = (val == AMD_VSA_SIG || val == GSW_VSA_SIG);
}
return has_vsa2;
}
EXPORT_SYMBOL_GPL(geode_has_vsa2);
static int __init geode_southbridge_init(void)
{
if (!is_geode())
return -ENODEV;
init_lbars();
(void) mfgpt_timer_setup();
return 0;
}
postcore_initcall(geode_southbridge_init);
|
