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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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b378f43fe9
Currently, ir device registration fails if keymap requested by driver is not found. Fix that by always compiling in the empty keymap, and using it as a failback. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Acked-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/* ir-raw-event.c - handle IR Pulse/Space event
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*
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* Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <media/ir-core.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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/* Used to handle IR raw handler extensions */
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static LIST_HEAD(rc_map_list);
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static DEFINE_SPINLOCK(rc_map_lock);
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static struct rc_keymap *seek_rc_map(const char *name)
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{
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struct rc_keymap *map = NULL;
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spin_lock(&rc_map_lock);
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list_for_each_entry(map, &rc_map_list, list) {
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if (!strcmp(name, map->map.name)) {
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spin_unlock(&rc_map_lock);
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return map;
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}
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}
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spin_unlock(&rc_map_lock);
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return NULL;
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}
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struct ir_scancode_table *get_rc_map(const char *name)
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{
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struct rc_keymap *map;
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map = seek_rc_map(name);
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#ifdef MODULE
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if (!map) {
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int rc = request_module(name);
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if (rc < 0) {
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printk(KERN_ERR "Couldn't load IR keymap %s\n", name);
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return NULL;
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}
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msleep(20); /* Give some time for IR to register */
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map = seek_rc_map(name);
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}
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#endif
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if (!map) {
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printk(KERN_ERR "IR keymap %s not found\n", name);
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return NULL;
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}
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printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);
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return &map->map;
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}
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EXPORT_SYMBOL_GPL(get_rc_map);
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int ir_register_map(struct rc_keymap *map)
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{
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spin_lock(&rc_map_lock);
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list_add_tail(&map->list, &rc_map_list);
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spin_unlock(&rc_map_lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(ir_register_map);
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void ir_unregister_map(struct rc_keymap *map)
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{
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spin_lock(&rc_map_lock);
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list_del(&map->list);
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spin_unlock(&rc_map_lock);
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}
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EXPORT_SYMBOL_GPL(ir_unregister_map);
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static struct ir_scancode empty[] = {
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{ 0x2a, KEY_COFFEE },
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};
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static struct rc_keymap empty_map = {
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.map = {
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.scan = empty,
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.size = ARRAY_SIZE(empty),
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.ir_type = IR_TYPE_UNKNOWN, /* Legacy IR type */
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.name = RC_MAP_EMPTY,
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}
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};
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int ir_rcmap_init(void)
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{
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return ir_register_map(&empty_map);
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}
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void ir_rcmap_cleanup(void)
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{
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ir_unregister_map(&empty_map);
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}
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