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
|
/*
* 7 Segment LED routines
* Based on RBTX49xx patch from CELF patch archive.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* (C) Copyright TOSHIBA CORPORATION 2005-2007
* All Rights Reserved.
*/
#include <linux/sysdev.h>
#include <linux/slab.h>
#include <linux/map_to_7segment.h>
#include <asm/txx9/generic.h>
static unsigned int tx_7segled_num;
static void (*tx_7segled_putc)(unsigned int pos, unsigned char val);
void __init txx9_7segled_init(unsigned int num,
void (*putc)(unsigned int pos, unsigned char val))
{
tx_7segled_num = num;
tx_7segled_putc = putc;
}
static SEG7_CONVERSION_MAP(txx9_seg7map, MAP_ASCII7SEG_ALPHANUM_LC);
int txx9_7segled_putc(unsigned int pos, char c)
{
if (pos >= tx_7segled_num)
return -EINVAL;
c = map_to_seg7(&txx9_seg7map, c);
if (c < 0)
return c;
tx_7segled_putc(pos, c);
return 0;
}
static ssize_t ascii_store(struct sys_device *dev,
struct sysdev_attribute *attr,
const char *buf, size_t size)
{
unsigned int ch = dev->id;
txx9_7segled_putc(ch, buf[0]);
return size;
}
static ssize_t raw_store(struct sys_device *dev,
struct sysdev_attribute *attr,
const char *buf, size_t size)
{
unsigned int ch = dev->id;
tx_7segled_putc(ch, buf[0]);
return size;
}
static SYSDEV_ATTR(ascii, 0200, NULL, ascii_store);
static SYSDEV_ATTR(raw, 0200, NULL, raw_store);
static ssize_t map_seg7_show(struct sysdev_class *class, char *buf)
{
memcpy(buf, &txx9_seg7map, sizeof(txx9_seg7map));
return sizeof(txx9_seg7map);
}
static ssize_t map_seg7_store(struct sysdev_class *class,
const char *buf, size_t size)
{
if (size != sizeof(txx9_seg7map))
return -EINVAL;
memcpy(&txx9_seg7map, buf, size);
return size;
}
static SYSDEV_CLASS_ATTR(map_seg7, 0600, map_seg7_show, map_seg7_store);
static struct sysdev_class tx_7segled_sysdev_class = {
.name = "7segled",
};
static int __init tx_7segled_init_sysfs(void)
{
int error, i;
if (!tx_7segled_num)
return -ENODEV;
error = sysdev_class_register(&tx_7segled_sysdev_class);
if (error)
return error;
error = sysdev_class_create_file(&tx_7segled_sysdev_class,
&attr_map_seg7);
if (error)
return error;
for (i = 0; i < tx_7segled_num; i++) {
struct sys_device *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
error = -ENODEV;
break;
}
dev->id = i;
dev->cls = &tx_7segled_sysdev_class;
error = sysdev_register(dev);
if (!error) {
sysdev_create_file(dev, &attr_ascii);
sysdev_create_file(dev, &attr_raw);
}
}
return error;
}
device_initcall(tx_7segled_init_sysfs);
|
