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path: root/drivers/media/rc/rc-map.c
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Diffstat (limited to 'drivers/media/rc/rc-map.c')
-rw-r--r--drivers/media/rc/rc-map.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/drivers/media/rc/rc-map.c b/drivers/media/rc/rc-map.c
new file mode 100644
index 000000000000..689143f2fff0
--- /dev/null
+++ b/drivers/media/rc/rc-map.c
@@ -0,0 +1,107 @@
+/* ir-raw-event.c - handle IR Pulse/Space event
+ *
+ * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <media/ir-core.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+
+/* Used to handle IR raw handler extensions */
+static LIST_HEAD(rc_map_list);
+static DEFINE_SPINLOCK(rc_map_lock);
+
+static struct rc_keymap *seek_rc_map(const char *name)
+{
+ struct rc_keymap *map = NULL;
+
+ spin_lock(&rc_map_lock);
+ list_for_each_entry(map, &rc_map_list, list) {
+ if (!strcmp(name, map->map.name)) {
+ spin_unlock(&rc_map_lock);
+ return map;
+ }
+ }
+ spin_unlock(&rc_map_lock);
+
+ return NULL;
+}
+
+struct ir_scancode_table *get_rc_map(const char *name)
+{
+
+ struct rc_keymap *map;
+
+ map = seek_rc_map(name);
+#ifdef MODULE
+ if (!map) {
+ int rc = request_module(name);
+ if (rc < 0) {
+ printk(KERN_ERR "Couldn't load IR keymap %s\n", name);
+ return NULL;
+ }
+ msleep(20); /* Give some time for IR to register */
+
+ map = seek_rc_map(name);
+ }
+#endif
+ if (!map) {
+ printk(KERN_ERR "IR keymap %s not found\n", name);
+ return NULL;
+ }
+
+ printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);
+
+ return &map->map;
+}
+EXPORT_SYMBOL_GPL(get_rc_map);
+
+int ir_register_map(struct rc_keymap *map)
+{
+ spin_lock(&rc_map_lock);
+ list_add_tail(&map->list, &rc_map_list);
+ spin_unlock(&rc_map_lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ir_register_map);
+
+void ir_unregister_map(struct rc_keymap *map)
+{
+ spin_lock(&rc_map_lock);
+ list_del(&map->list);
+ spin_unlock(&rc_map_lock);
+}
+EXPORT_SYMBOL_GPL(ir_unregister_map);
+
+
+static struct ir_scancode empty[] = {
+ { 0x2a, KEY_COFFEE },
+};
+
+static struct rc_keymap empty_map = {
+ .map = {
+ .scan = empty,
+ .size = ARRAY_SIZE(empty),
+ .ir_type = IR_TYPE_UNKNOWN, /* Legacy IR type */
+ .name = RC_MAP_EMPTY,
+ }
+};
+
+int ir_rcmap_init(void)
+{
+ return ir_register_map(&empty_map);
+}
+
+void ir_rcmap_cleanup(void)
+{
+ ir_unregister_map(&empty_map);
+}