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
|
/*
* Memory access timing control sysfs for the s3c24xx based device
*
* (C) 2008 by Openmoko Inc.
* Author: Andy Green <andy@openmoko.com>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/arch/regs-mem.h>
static ssize_t neo1973_memconfig_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
int index = attr->attr.name[strlen(attr->attr.name) - 1] - '0';
u32 reg = *((u32 *)(S3C2410_MEMREG(((index + 1) << 2))));
static const char *meaning[][8] = {
{
[0] = "normal (1 data)",
[1] = "4 data",
[2] = "8 data",
[3] = "16 data",
}, {
[0] = "2 clocks",
[1] = "3 clocks",
[2] = "4 clocks",
[3] = "6 clocks",
}, {
[0] = "0 clocks",
[1] = "1 clock",
[2] = "2 clocks",
[3] = "4 clocks",
}, {
[0] = "1 clock",
[1] = "2 clocks",
[2] = "3 clocks",
[3] = "4 clocks",
[4] = "6 clocks",
[5] = "8 clocks",
[6] = "10 clocks",
[7] = "14 clocks",
}, { /* after this, only for CS6 and CS7 */
[0] = "ROM / SRAM",
[1] = "(illegal)",
[2] = "(illegal)",
[3] = "Sync DRAM",
}, {
[0] = "8 Column bits",
[1] = "9 Column bits",
[2] = "10 Column bits",
[3] = "(illegal)",
}, {
[0] = "2 clocks",
[1] = "3 clocks",
[2] = "4 clocks",
[3] = "(illegal)",
}
};
if (index >= 6)
if (((reg >> 15) & 3) == 3) /* DRAM */
return sprintf(buf, "BANKCON%d = 0x%08X\n DRAM:\n"
" Trcd = %s\n SCAN = %s\n", index,
reg, meaning[5][reg & 3],
meaning[1][(reg >> 2) & 3]);
return sprintf(buf, "BANKCON%d = 0x%08X\n Type = %s\n PMC = %s\n"
" Tacp = %s\n Tcah = %s\n Tcoh = %s\n Tacc = %s\n"
" Tcos = %s\n Tacs = %s\n",
index, reg, meaning[4][(reg >> 15) & 3],
meaning[0][reg & 3],
meaning[1][(reg >> 2) & 3],
meaning[2][(reg >> 4) & 3],
meaning[2][(reg >> 6) & 3],
meaning[3][(reg >> 8) & 7],
meaning[2][(reg >> 11) & 3],
meaning[2][(reg >> 13) & 3]);
}
static ssize_t neo1973_memconfig_write(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int index = attr->attr.name[strlen(attr->attr.name) - 1] - '0';
unsigned long val = simple_strtoul(buf, NULL, 16);
dev_info(dev, "setting BANKCON%d <- 0x%08X\n", index, (u32)val);
*((u32 *)(S3C2410_MEMREG(((index + 1) << 2)))) = (u32)val;
return count;
}
static DEVICE_ATTR(BANKCON0, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static DEVICE_ATTR(BANKCON1, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static DEVICE_ATTR(BANKCON2, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static DEVICE_ATTR(BANKCON3, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static DEVICE_ATTR(BANKCON4, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static DEVICE_ATTR(BANKCON5, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static DEVICE_ATTR(BANKCON6, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static DEVICE_ATTR(BANKCON7, 0644, neo1973_memconfig_read,
neo1973_memconfig_write);
static struct attribute *neo1973_memconfig_sysfs_entries[] = {
&dev_attr_BANKCON0.attr,
&dev_attr_BANKCON1.attr,
&dev_attr_BANKCON2.attr,
&dev_attr_BANKCON3.attr,
&dev_attr_BANKCON4.attr,
&dev_attr_BANKCON5.attr,
&dev_attr_BANKCON6.attr,
&dev_attr_BANKCON7.attr,
NULL
};
static struct attribute_group neo1973_memconfig_attr_group = {
.name = NULL,
.attrs = neo1973_memconfig_sysfs_entries,
};
static int __init neo1973_memconfig_probe(struct platform_device *pdev)
{
dev_info(&pdev->dev, "starting\n");
switch (machine_arch_type) {
#ifdef CONFIG_MACH_NEO1973_GTA01
case MACH_TYPE_NEO1973_GTA01:
return -EINVAL;
#endif /* CONFIG_MACH_NEO1973_GTA01 */
default:
break;
}
return sysfs_create_group(&pdev->dev.kobj,
&neo1973_memconfig_attr_group);
}
static int neo1973_memconfig_remove(struct platform_device *pdev)
{
sysfs_remove_group(&pdev->dev.kobj, &neo1973_memconfig_attr_group);
return 0;
}
static struct platform_driver neo1973_memconfig_driver = {
.probe = neo1973_memconfig_probe,
.remove = neo1973_memconfig_remove,
.driver = {
.name = "neo1973-memconfig",
},
};
static int __devinit neo1973_memconfig_init(void)
{
return platform_driver_register(&neo1973_memconfig_driver);
}
static void neo1973_memconfig_exit(void)
{
platform_driver_unregister(&neo1973_memconfig_driver);
}
module_init(neo1973_memconfig_init);
module_exit(neo1973_memconfig_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
MODULE_DESCRIPTION("neo1973 memconfig");
|
