2 * 7 Segment LED routines
3 * Based on RBTX49xx patch from CELF patch archive.
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
9 * (C) Copyright TOSHIBA CORPORATION 2005-2007
10 * All Rights Reserved.
12 #include <linux/device.h>
13 #include <linux/slab.h>
14 #include <linux/map_to_7segment.h>
15 #include <asm/txx9/generic.h>
17 static unsigned int tx_7segled_num;
18 static void (*tx_7segled_putc)(unsigned int pos, unsigned char val);
20 void __init txx9_7segled_init(unsigned int num,
21 void (*putc)(unsigned int pos, unsigned char val))
24 tx_7segled_putc = putc;
27 static SEG7_CONVERSION_MAP(txx9_seg7map, MAP_ASCII7SEG_ALPHANUM_LC);
29 int txx9_7segled_putc(unsigned int pos, char c)
31 if (pos >= tx_7segled_num)
33 c = map_to_seg7(&txx9_seg7map, c);
36 tx_7segled_putc(pos, c);
40 static ssize_t ascii_store(struct device *dev,
41 struct device_attribute *attr,
42 const char *buf, size_t size)
44 unsigned int ch = dev->id;
45 txx9_7segled_putc(ch, buf[0]);
49 static ssize_t raw_store(struct device *dev,
50 struct device_attribute *attr,
51 const char *buf, size_t size)
53 unsigned int ch = dev->id;
54 tx_7segled_putc(ch, buf[0]);
58 static DEVICE_ATTR_WO(ascii);
59 static DEVICE_ATTR_WO(raw);
61 static ssize_t map_seg7_show(struct device *dev,
62 struct device_attribute *attr,
65 memcpy(buf, &txx9_seg7map, sizeof(txx9_seg7map));
66 return sizeof(txx9_seg7map);
69 static ssize_t map_seg7_store(struct device *dev,
70 struct device_attribute *attr,
71 const char *buf, size_t size)
73 if (size != sizeof(txx9_seg7map))
75 memcpy(&txx9_seg7map, buf, size);
79 static DEVICE_ATTR(map_seg7, 0600, map_seg7_show, map_seg7_store);
81 static struct bus_type tx_7segled_subsys = {
83 .dev_name = "7segled",
86 static void tx_7segled_release(struct device *dev)
91 static int __init tx_7segled_init_sysfs(void)
96 error = subsys_system_register(&tx_7segled_subsys, NULL);
99 error = device_create_file(tx_7segled_subsys.dev_root, &dev_attr_map_seg7);
102 for (i = 0; i < tx_7segled_num; i++) {
104 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
110 dev->bus = &tx_7segled_subsys;
111 dev->release = &tx_7segled_release;
112 error = device_register(dev);
117 device_create_file(dev, &dev_attr_ascii);
118 device_create_file(dev, &dev_attr_raw);
123 device_initcall(tx_7segled_init_sysfs);