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Diffstat (limited to 'kernel/arch/mips/txx9/generic/7segled.c')
-rw-r--r--kernel/arch/mips/txx9/generic/7segled.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/kernel/arch/mips/txx9/generic/7segled.c b/kernel/arch/mips/txx9/generic/7segled.c
new file mode 100644
index 000000000..566c58bd4
--- /dev/null
+++ b/kernel/arch/mips/txx9/generic/7segled.c
@@ -0,0 +1,123 @@
+/*
+ * 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/device.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 device *dev,
+ struct device_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 device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ unsigned int ch = dev->id;
+ tx_7segled_putc(ch, buf[0]);
+ return size;
+}
+
+static DEVICE_ATTR(ascii, 0200, NULL, ascii_store);
+static DEVICE_ATTR(raw, 0200, NULL, raw_store);
+
+static ssize_t map_seg7_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ memcpy(buf, &txx9_seg7map, sizeof(txx9_seg7map));
+ return sizeof(txx9_seg7map);
+}
+
+static ssize_t map_seg7_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ if (size != sizeof(txx9_seg7map))
+ return -EINVAL;
+ memcpy(&txx9_seg7map, buf, size);
+ return size;
+}
+
+static DEVICE_ATTR(map_seg7, 0600, map_seg7_show, map_seg7_store);
+
+static struct bus_type tx_7segled_subsys = {
+ .name = "7segled",
+ .dev_name = "7segled",
+};
+
+static void tx_7segled_release(struct device *dev)
+{
+ kfree(dev);
+}
+
+static int __init tx_7segled_init_sysfs(void)
+{
+ int error, i;
+ if (!tx_7segled_num)
+ return -ENODEV;
+ error = subsys_system_register(&tx_7segled_subsys, NULL);
+ if (error)
+ return error;
+ error = device_create_file(tx_7segled_subsys.dev_root, &dev_attr_map_seg7);
+ if (error)
+ return error;
+ for (i = 0; i < tx_7segled_num; i++) {
+ struct device *dev;
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev) {
+ error = -ENODEV;
+ break;
+ }
+ dev->id = i;
+ dev->bus = &tx_7segled_subsys;
+ dev->release = &tx_7segled_release;
+ error = device_register(dev);
+ if (error) {
+ put_device(dev);
+ return error;
+ }
+ device_create_file(dev, &dev_attr_ascii);
+ device_create_file(dev, &dev_attr_raw);
+ }
+ return error;
+}
+
+device_initcall(tx_7segled_init_sysfs);