113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
|
|
* 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);
|