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/* rc-main.c - Remote Controller core module
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* Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
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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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* 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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#include <media/rc-core.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include "rc-core-priv.h"
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/* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */
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#define IR_TAB_MIN_SIZE 256
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#define IR_TAB_MAX_SIZE 8192
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/* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */
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#define IR_KEYPRESS_TIMEOUT 250
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/* Used to keep track of known keymaps */
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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_map_list *seek_rc_map(const char *name)
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struct rc_map_list *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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spin_unlock(&rc_map_lock);
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struct rc_map *rc_map_get(const char *name)
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struct rc_map_list *map;
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map = seek_rc_map(name);
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int rc = request_module(name);
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printk(KERN_ERR "Couldn't load IR keymap %s\n", name);
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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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printk(KERN_ERR "IR keymap %s not found\n", name);
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printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);
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EXPORT_SYMBOL_GPL(rc_map_get);
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int rc_map_register(struct rc_map_list *map)
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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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EXPORT_SYMBOL_GPL(rc_map_register);
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void rc_map_unregister(struct rc_map_list *map)
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spin_lock(&rc_map_lock);
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spin_unlock(&rc_map_lock);
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EXPORT_SYMBOL_GPL(rc_map_unregister);
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static struct rc_map_table empty[] = {
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static struct rc_map_list empty_map = {
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.size = ARRAY_SIZE(empty),
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.rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */
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.name = RC_MAP_EMPTY,
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* ir_create_table() - initializes a scancode table
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* @rc_map: the rc_map to initialize
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* @name: name to assign to the table
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* @rc_type: ir type to assign to the new table
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* @size: initial size of the table
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* @return: zero on success or a negative error code
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* This routine will initialize the rc_map and will allocate
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* memory to hold at least the specified number of elements.
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static int ir_create_table(struct rc_map *rc_map,
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const char *name, u64 rc_type, size_t size)
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rc_map->rc_type = rc_type;
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rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table));
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rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
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rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL);
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IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n",
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rc_map->size, rc_map->alloc);
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* ir_free_table() - frees memory allocated by a scancode table
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* @rc_map: the table whose mappings need to be freed
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* This routine will free memory alloctaed for key mappings used by given
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static void ir_free_table(struct rc_map *rc_map)
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* ir_resize_table() - resizes a scancode table if necessary
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* @rc_map: the rc_map to resize
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* @gfp_flags: gfp flags to use when allocating memory
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* @return: zero on success or a negative error code
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* This routine will shrink the rc_map if it has lots of
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* unused entries and grow it if it is full.
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static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags)
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unsigned int oldalloc = rc_map->alloc;
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unsigned int newalloc = oldalloc;
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struct rc_map_table *oldscan = rc_map->scan;
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struct rc_map_table *newscan;
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if (rc_map->size == rc_map->len) {
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/* All entries in use -> grow keytable */
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if (rc_map->alloc >= IR_TAB_MAX_SIZE)
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IR_dprintk(1, "Growing table to %u bytes\n", newalloc);
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if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) {
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/* Less than 1/3 of entries in use -> shrink keytable */
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IR_dprintk(1, "Shrinking table to %u bytes\n", newalloc);
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if (newalloc == oldalloc)
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newscan = kmalloc(newalloc, gfp_flags);
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IR_dprintk(1, "Failed to kmalloc %u bytes\n", newalloc);
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memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table));
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rc_map->scan = newscan;
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rc_map->alloc = newalloc;
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rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
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* ir_update_mapping() - set a keycode in the scancode->keycode table
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* @dev: the struct rc_dev device descriptor
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* @rc_map: scancode table to be adjusted
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* @index: index of the mapping that needs to be updated
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* @keycode: the desired keycode
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* @return: previous keycode assigned to the mapping
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* This routine is used to update scancode->keycode mapping at given
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static unsigned int ir_update_mapping(struct rc_dev *dev,
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struct rc_map *rc_map,
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unsigned int new_keycode)
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int old_keycode = rc_map->scan[index].keycode;
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/* Did the user wish to remove the mapping? */
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if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) {
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IR_dprintk(1, "#%d: Deleting scan 0x%04x\n",
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index, rc_map->scan[index].scancode);
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memmove(&rc_map->scan[index], &rc_map->scan[index+ 1],
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(rc_map->len - index) * sizeof(struct rc_map_table));
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IR_dprintk(1, "#%d: %s scan 0x%04x with key 0x%04x\n",
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old_keycode == KEY_RESERVED ? "New" : "Replacing",
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rc_map->scan[index].scancode, new_keycode);
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rc_map->scan[index].keycode = new_keycode;
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__set_bit(new_keycode, dev->input_dev->keybit);
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if (old_keycode != KEY_RESERVED) {
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/* A previous mapping was updated... */
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__clear_bit(old_keycode, dev->input_dev->keybit);
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/* ... but another scancode might use the same keycode */
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for (i = 0; i < rc_map->len; i++) {
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if (rc_map->scan[i].keycode == old_keycode) {
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__set_bit(old_keycode, dev->input_dev->keybit);
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/* Possibly shrink the keytable, failure is not a problem */
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ir_resize_table(rc_map, GFP_ATOMIC);
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* ir_establish_scancode() - set a keycode in the scancode->keycode table
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* @dev: the struct rc_dev device descriptor
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* @rc_map: scancode table to be searched
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* @scancode: the desired scancode
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* @resize: controls whether we allowed to resize the table to
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* accommodate not yet present scancodes
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* @return: index of the mapping containing scancode in question
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* or -1U in case of failure.
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* This routine is used to locate given scancode in rc_map.
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* If scancode is not yet present the routine will allocate a new slot
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static unsigned int ir_establish_scancode(struct rc_dev *dev,
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struct rc_map *rc_map,
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unsigned int scancode,
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* Unfortunately, some hardware-based IR decoders don't provide
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* all bits for the complete IR code. In general, they provide only
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* the command part of the IR code. Yet, as it is possible to replace
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* the provided IR with another one, it is needed to allow loading
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* IR tables from other remotes. So, we support specifying a mask to
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* indicate the valid bits of the scancodes.
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scancode &= dev->scanmask;
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/* First check if we already have a mapping for this ir command */
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for (i = 0; i < rc_map->len; i++) {
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if (rc_map->scan[i].scancode == scancode)
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/* Keytable is sorted from lowest to highest scancode */
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if (rc_map->scan[i].scancode >= scancode)
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/* No previous mapping found, we might need to grow the table */
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if (rc_map->size == rc_map->len) {
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if (!resize || ir_resize_table(rc_map, GFP_ATOMIC))
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/* i is the proper index to insert our new keycode */
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memmove(&rc_map->scan[i + 1], &rc_map->scan[i],
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(rc_map->len - i) * sizeof(struct rc_map_table));
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rc_map->scan[i].scancode = scancode;
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rc_map->scan[i].keycode = KEY_RESERVED;
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* ir_setkeycode() - set a keycode in the scancode->keycode table
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* @idev: the struct input_dev device descriptor
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* @scancode: the desired scancode
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* @return: -EINVAL if the keycode could not be inserted, otherwise zero.
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* This routine is used to handle evdev EVIOCSKEY ioctl.
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static int ir_setkeycode(struct input_dev *idev,
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const struct input_keymap_entry *ke,
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unsigned int *old_keycode)
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struct rc_dev *rdev = input_get_drvdata(idev);
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struct rc_map *rc_map = &rdev->rc_map;
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unsigned int scancode;
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spin_lock_irqsave(&rc_map->lock, flags);
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if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
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if (index >= rc_map->len) {
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retval = input_scancode_to_scalar(ke, &scancode);
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index = ir_establish_scancode(rdev, rc_map, scancode, true);
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if (index >= rc_map->len) {
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*old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode);
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spin_unlock_irqrestore(&rc_map->lock, flags);
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* ir_setkeytable() - sets several entries in the scancode->keycode table
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* @dev: the struct rc_dev device descriptor
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* @to: the struct rc_map to copy entries to
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* @from: the struct rc_map to copy entries from
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* @return: -ENOMEM if all keycodes could not be inserted, otherwise zero.
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* This routine is used to handle table initialization.
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static int ir_setkeytable(struct rc_dev *dev,
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const struct rc_map *from)
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struct rc_map *rc_map = &dev->rc_map;
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unsigned int i, index;
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rc = ir_create_table(rc_map, from->name,
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from->rc_type, from->size);
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IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n",
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rc_map->size, rc_map->alloc);
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for (i = 0; i < from->size; i++) {
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index = ir_establish_scancode(dev, rc_map,
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from->scan[i].scancode, false);
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if (index >= rc_map->len) {
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ir_update_mapping(dev, rc_map, index,
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from->scan[i].keycode);
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ir_free_table(rc_map);
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* ir_lookup_by_scancode() - locate mapping by scancode
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* @rc_map: the struct rc_map to search
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* @scancode: scancode to look for in the table
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* @return: index in the table, -1U if not found
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* This routine performs binary search in RC keykeymap table for
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static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map,
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unsigned int scancode)
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int end = rc_map->len - 1;
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while (start <= end) {
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mid = (start + end) / 2;
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if (rc_map->scan[mid].scancode < scancode)
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else if (rc_map->scan[mid].scancode > scancode)
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* ir_getkeycode() - get a keycode from the scancode->keycode table
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* @idev: the struct input_dev device descriptor
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* @scancode: the desired scancode
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* @keycode: used to return the keycode, if found, or KEY_RESERVED
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* @return: always returns zero.
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* This routine is used to handle evdev EVIOCGKEY ioctl.
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static int ir_getkeycode(struct input_dev *idev,
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struct input_keymap_entry *ke)
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struct rc_dev *rdev = input_get_drvdata(idev);
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struct rc_map *rc_map = &rdev->rc_map;
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struct rc_map_table *entry;
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unsigned int scancode;
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spin_lock_irqsave(&rc_map->lock, flags);
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if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
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retval = input_scancode_to_scalar(ke, &scancode);
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index = ir_lookup_by_scancode(rc_map, scancode);
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if (index < rc_map->len) {
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entry = &rc_map->scan[index];
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ke->keycode = entry->keycode;
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ke->len = sizeof(entry->scancode);
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memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode));
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} else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) {
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* We do not really know the valid range of scancodes
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* so let's respond with KEY_RESERVED to anything we
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* do not have mapping for [yet].
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ke->keycode = KEY_RESERVED;
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spin_unlock_irqrestore(&rc_map->lock, flags);
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* rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode
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* @dev: the struct rc_dev descriptor of the device
493
* @scancode: the scancode to look for
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* @return: the corresponding keycode, or KEY_RESERVED
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* This routine is used by drivers which need to convert a scancode to a
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* keycode. Normally it should not be used since drivers should have no
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* interest in keycodes.
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u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode)
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struct rc_map *rc_map = &dev->rc_map;
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unsigned int keycode;
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spin_lock_irqsave(&rc_map->lock, flags);
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index = ir_lookup_by_scancode(rc_map, scancode);
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keycode = index < rc_map->len ?
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rc_map->scan[index].keycode : KEY_RESERVED;
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spin_unlock_irqrestore(&rc_map->lock, flags);
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if (keycode != KEY_RESERVED)
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IR_dprintk(1, "%s: scancode 0x%04x keycode 0x%02x\n",
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dev->input_name, scancode, keycode);
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EXPORT_SYMBOL_GPL(rc_g_keycode_from_table);
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* ir_do_keyup() - internal function to signal the release of a keypress
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* @dev: the struct rc_dev descriptor of the device
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* @sync: whether or not to call input_sync
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* This function is used internally to release a keypress, it must be
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* called with keylock held.
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static void ir_do_keyup(struct rc_dev *dev, bool sync)
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if (!dev->keypressed)
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IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode);
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input_report_key(dev->input_dev, dev->last_keycode, 0);
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input_sync(dev->input_dev);
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dev->keypressed = false;
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* rc_keyup() - signals the release of a keypress
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* @dev: the struct rc_dev descriptor of the device
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* This routine is used to signal that a key has been released on the
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void rc_keyup(struct rc_dev *dev)
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spin_lock_irqsave(&dev->keylock, flags);
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ir_do_keyup(dev, true);
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spin_unlock_irqrestore(&dev->keylock, flags);
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EXPORT_SYMBOL_GPL(rc_keyup);
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* ir_timer_keyup() - generates a keyup event after a timeout
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* @cookie: a pointer to the struct rc_dev for the device
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* This routine will generate a keyup event some time after a keydown event
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* is generated when no further activity has been detected.
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static void ir_timer_keyup(unsigned long cookie)
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struct rc_dev *dev = (struct rc_dev *)cookie;
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* ir->keyup_jiffies is used to prevent a race condition if a
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* hardware interrupt occurs at this point and the keyup timer
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* event is moved further into the future as a result.
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* The timer will then be reactivated and this function called
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* again in the future. We need to exit gracefully in that case
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* to allow the input subsystem to do its auto-repeat magic or
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* a keyup event might follow immediately after the keydown.
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spin_lock_irqsave(&dev->keylock, flags);
583
if (time_is_before_eq_jiffies(dev->keyup_jiffies))
584
ir_do_keyup(dev, true);
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spin_unlock_irqrestore(&dev->keylock, flags);
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* rc_repeat() - signals that a key is still pressed
590
* @dev: the struct rc_dev descriptor of the device
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* This routine is used by IR decoders when a repeat message which does
593
* not include the necessary bits to reproduce the scancode has been
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void rc_repeat(struct rc_dev *dev)
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spin_lock_irqsave(&dev->keylock, flags);
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input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode);
603
input_sync(dev->input_dev);
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if (!dev->keypressed)
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dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT);
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mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
612
spin_unlock_irqrestore(&dev->keylock, flags);
614
EXPORT_SYMBOL_GPL(rc_repeat);
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* ir_do_keydown() - internal function to process a keypress
618
* @dev: the struct rc_dev descriptor of the device
619
* @scancode: the scancode of the keypress
620
* @keycode: the keycode of the keypress
621
* @toggle: the toggle value of the keypress
623
* This function is used internally to register a keypress, it must be
624
* called with keylock held.
626
static void ir_do_keydown(struct rc_dev *dev, int scancode,
627
u32 keycode, u8 toggle)
629
bool new_event = !dev->keypressed ||
630
dev->last_scancode != scancode ||
631
dev->last_toggle != toggle;
633
if (new_event && dev->keypressed)
634
ir_do_keyup(dev, false);
636
input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode);
638
if (new_event && keycode != KEY_RESERVED) {
639
/* Register a keypress */
640
dev->keypressed = true;
641
dev->last_scancode = scancode;
642
dev->last_toggle = toggle;
643
dev->last_keycode = keycode;
645
IR_dprintk(1, "%s: key down event, "
646
"key 0x%04x, scancode 0x%04x\n",
647
dev->input_name, keycode, scancode);
648
input_report_key(dev->input_dev, keycode, 1);
651
input_sync(dev->input_dev);
655
* rc_keydown() - generates input event for a key press
656
* @dev: the struct rc_dev descriptor of the device
657
* @scancode: the scancode that we're seeking
658
* @toggle: the toggle value (protocol dependent, if the protocol doesn't
659
* support toggle values, this should be set to zero)
661
* This routine is used to signal that a key has been pressed on the
664
void rc_keydown(struct rc_dev *dev, int scancode, u8 toggle)
667
u32 keycode = rc_g_keycode_from_table(dev, scancode);
669
spin_lock_irqsave(&dev->keylock, flags);
670
ir_do_keydown(dev, scancode, keycode, toggle);
672
if (dev->keypressed) {
673
dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT);
674
mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
676
spin_unlock_irqrestore(&dev->keylock, flags);
678
EXPORT_SYMBOL_GPL(rc_keydown);
681
* rc_keydown_notimeout() - generates input event for a key press without
682
* an automatic keyup event at a later time
683
* @dev: the struct rc_dev descriptor of the device
684
* @scancode: the scancode that we're seeking
685
* @toggle: the toggle value (protocol dependent, if the protocol doesn't
686
* support toggle values, this should be set to zero)
688
* This routine is used to signal that a key has been pressed on the
689
* remote control. The driver must manually call rc_keyup() at a later stage.
691
void rc_keydown_notimeout(struct rc_dev *dev, int scancode, u8 toggle)
694
u32 keycode = rc_g_keycode_from_table(dev, scancode);
696
spin_lock_irqsave(&dev->keylock, flags);
697
ir_do_keydown(dev, scancode, keycode, toggle);
698
spin_unlock_irqrestore(&dev->keylock, flags);
700
EXPORT_SYMBOL_GPL(rc_keydown_notimeout);
702
static int ir_open(struct input_dev *idev)
704
struct rc_dev *rdev = input_get_drvdata(idev);
706
return rdev->open(rdev);
709
static void ir_close(struct input_dev *idev)
711
struct rc_dev *rdev = input_get_drvdata(idev);
717
/* class for /sys/class/rc */
718
static char *ir_devnode(struct device *dev, mode_t *mode)
720
return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev));
723
static struct class ir_input_class = {
725
.devnode = ir_devnode,
732
{ RC_TYPE_UNKNOWN, "unknown" },
733
{ RC_TYPE_RC5, "rc-5" },
734
{ RC_TYPE_NEC, "nec" },
735
{ RC_TYPE_RC6, "rc-6" },
736
{ RC_TYPE_JVC, "jvc" },
737
{ RC_TYPE_SONY, "sony" },
738
{ RC_TYPE_RC5_SZ, "rc-5-sz" },
739
{ RC_TYPE_MCE_KBD, "mce_kbd" },
740
{ RC_TYPE_LIRC, "lirc" },
741
{ RC_TYPE_OTHER, "other" },
744
#define PROTO_NONE "none"
747
* show_protocols() - shows the current IR protocol(s)
748
* @device: the device descriptor
749
* @mattr: the device attribute struct (unused)
750
* @buf: a pointer to the output buffer
752
* This routine is a callback routine for input read the IR protocol type(s).
753
* it is trigged by reading /sys/class/rc/rc?/protocols.
754
* It returns the protocol names of supported protocols.
755
* Enabled protocols are printed in brackets.
757
* dev->lock is taken to guard against races between device
758
* registration, store_protocols and show_protocols.
760
static ssize_t show_protocols(struct device *device,
761
struct device_attribute *mattr, char *buf)
763
struct rc_dev *dev = to_rc_dev(device);
764
u64 allowed, enabled;
768
/* Device is being removed */
772
mutex_lock(&dev->lock);
774
if (dev->driver_type == RC_DRIVER_SCANCODE) {
775
enabled = dev->rc_map.rc_type;
776
allowed = dev->allowed_protos;
778
enabled = dev->raw->enabled_protocols;
779
allowed = ir_raw_get_allowed_protocols();
782
IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n",
786
for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
787
if (allowed & enabled & proto_names[i].type)
788
tmp += sprintf(tmp, "[%s] ", proto_names[i].name);
789
else if (allowed & proto_names[i].type)
790
tmp += sprintf(tmp, "%s ", proto_names[i].name);
797
mutex_unlock(&dev->lock);
799
return tmp + 1 - buf;
803
* store_protocols() - changes the current IR protocol(s)
804
* @device: the device descriptor
805
* @mattr: the device attribute struct (unused)
806
* @buf: a pointer to the input buffer
807
* @len: length of the input buffer
809
* This routine is for changing the IR protocol type.
810
* It is trigged by writing to /sys/class/rc/rc?/protocols.
811
* Writing "+proto" will add a protocol to the list of enabled protocols.
812
* Writing "-proto" will remove a protocol from the list of enabled protocols.
813
* Writing "proto" will enable only "proto".
814
* Writing "none" will disable all protocols.
815
* Returns -EINVAL if an invalid protocol combination or unknown protocol name
816
* is used, otherwise @len.
818
* dev->lock is taken to guard against races between device
819
* registration, store_protocols and show_protocols.
821
static ssize_t store_protocols(struct device *device,
822
struct device_attribute *mattr,
826
struct rc_dev *dev = to_rc_dev(device);
827
bool enable, disable;
831
int rc, i, count = 0;
835
/* Device is being removed */
839
mutex_lock(&dev->lock);
841
if (dev->driver_type == RC_DRIVER_SCANCODE)
842
type = dev->rc_map.rc_type;
844
type = dev->raw->enabled_protocols;
846
IR_dprintk(1, "Protocol switching not supported\n");
851
while ((tmp = strsep((char **) &data, " \n")) != NULL) {
859
} else if (*tmp == '-') {
868
if (!enable && !disable && !strncasecmp(tmp, PROTO_NONE, sizeof(PROTO_NONE))) {
869
tmp += sizeof(PROTO_NONE);
873
for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
874
if (!strcasecmp(tmp, proto_names[i].name)) {
875
tmp += strlen(proto_names[i].name);
876
mask = proto_names[i].type;
880
if (i == ARRAY_SIZE(proto_names)) {
881
IR_dprintk(1, "Unknown protocol: '%s'\n", tmp);
897
IR_dprintk(1, "Protocol not specified\n");
902
if (dev->change_protocol) {
903
rc = dev->change_protocol(dev, type);
905
IR_dprintk(1, "Error setting protocols to 0x%llx\n",
912
if (dev->driver_type == RC_DRIVER_SCANCODE) {
913
spin_lock_irqsave(&dev->rc_map.lock, flags);
914
dev->rc_map.rc_type = type;
915
spin_unlock_irqrestore(&dev->rc_map.lock, flags);
917
dev->raw->enabled_protocols = type;
920
IR_dprintk(1, "Current protocol(s): 0x%llx\n",
926
mutex_unlock(&dev->lock);
930
static void rc_dev_release(struct device *device)
934
#define ADD_HOTPLUG_VAR(fmt, val...) \
936
int err = add_uevent_var(env, fmt, val); \
941
static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
943
struct rc_dev *dev = to_rc_dev(device);
945
if (!dev || !dev->input_dev)
948
if (dev->rc_map.name)
949
ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name);
950
if (dev->driver_name)
951
ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name);
957
* Static device attribute struct with the sysfs attributes for IR's
959
static DEVICE_ATTR(protocols, S_IRUGO | S_IWUSR,
960
show_protocols, store_protocols);
962
static struct attribute *rc_dev_attrs[] = {
963
&dev_attr_protocols.attr,
967
static struct attribute_group rc_dev_attr_grp = {
968
.attrs = rc_dev_attrs,
971
static const struct attribute_group *rc_dev_attr_groups[] = {
976
static struct device_type rc_dev_type = {
977
.groups = rc_dev_attr_groups,
978
.release = rc_dev_release,
979
.uevent = rc_dev_uevent,
982
struct rc_dev *rc_allocate_device(void)
986
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
990
dev->input_dev = input_allocate_device();
991
if (!dev->input_dev) {
996
dev->input_dev->getkeycode = ir_getkeycode;
997
dev->input_dev->setkeycode = ir_setkeycode;
998
input_set_drvdata(dev->input_dev, dev);
1000
spin_lock_init(&dev->rc_map.lock);
1001
spin_lock_init(&dev->keylock);
1002
mutex_init(&dev->lock);
1003
setup_timer(&dev->timer_keyup, ir_timer_keyup, (unsigned long)dev);
1005
dev->dev.type = &rc_dev_type;
1006
dev->dev.class = &ir_input_class;
1007
device_initialize(&dev->dev);
1009
__module_get(THIS_MODULE);
1012
EXPORT_SYMBOL_GPL(rc_allocate_device);
1014
void rc_free_device(struct rc_dev *dev)
1020
input_free_device(dev->input_dev);
1022
put_device(&dev->dev);
1025
module_put(THIS_MODULE);
1027
EXPORT_SYMBOL_GPL(rc_free_device);
1029
int rc_register_device(struct rc_dev *dev)
1031
static atomic_t devno = ATOMIC_INIT(0);
1032
struct rc_map *rc_map;
1036
if (!dev || !dev->map_name)
1039
rc_map = rc_map_get(dev->map_name);
1041
rc_map = rc_map_get(RC_MAP_EMPTY);
1042
if (!rc_map || !rc_map->scan || rc_map->size == 0)
1045
set_bit(EV_KEY, dev->input_dev->evbit);
1046
set_bit(EV_REP, dev->input_dev->evbit);
1047
set_bit(EV_MSC, dev->input_dev->evbit);
1048
set_bit(MSC_SCAN, dev->input_dev->mscbit);
1050
dev->input_dev->open = ir_open;
1052
dev->input_dev->close = ir_close;
1055
* Take the lock here, as the device sysfs node will appear
1056
* when device_add() is called, which may trigger an ir-keytable udev
1057
* rule, which will in turn call show_protocols and access either
1058
* dev->rc_map.rc_type or dev->raw->enabled_protocols before it has
1061
mutex_lock(&dev->lock);
1063
dev->devno = (unsigned long)(atomic_inc_return(&devno) - 1);
1064
dev_set_name(&dev->dev, "rc%ld", dev->devno);
1065
dev_set_drvdata(&dev->dev, dev);
1066
rc = device_add(&dev->dev);
1070
rc = ir_setkeytable(dev, rc_map);
1074
dev->input_dev->dev.parent = &dev->dev;
1075
memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id));
1076
dev->input_dev->phys = dev->input_phys;
1077
dev->input_dev->name = dev->input_name;
1078
rc = input_register_device(dev->input_dev);
1083
* Default delay of 250ms is too short for some protocols, especially
1084
* since the timeout is currently set to 250ms. Increase it to 500ms,
1085
* to avoid wrong repetition of the keycodes. Note that this must be
1086
* set after the call to input_register_device().
1088
dev->input_dev->rep[REP_DELAY] = 500;
1091
* As a repeat event on protocols like RC-5 and NEC take as long as
1092
* 110/114ms, using 33ms as a repeat period is not the right thing
1095
dev->input_dev->rep[REP_PERIOD] = 125;
1097
path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
1098
printk(KERN_INFO "%s: %s as %s\n",
1099
dev_name(&dev->dev),
1100
dev->input_name ? dev->input_name : "Unspecified device",
1101
path ? path : "N/A");
1104
if (dev->driver_type == RC_DRIVER_IR_RAW) {
1105
rc = ir_raw_event_register(dev);
1110
if (dev->change_protocol) {
1111
rc = dev->change_protocol(dev, rc_map->rc_type);
1116
mutex_unlock(&dev->lock);
1118
IR_dprintk(1, "Registered rc%ld (driver: %s, remote: %s, mode %s)\n",
1120
dev->driver_name ? dev->driver_name : "unknown",
1121
rc_map->name ? rc_map->name : "unknown",
1122
dev->driver_type == RC_DRIVER_IR_RAW ? "raw" : "cooked");
1127
if (dev->driver_type == RC_DRIVER_IR_RAW)
1128
ir_raw_event_unregister(dev);
1130
input_unregister_device(dev->input_dev);
1131
dev->input_dev = NULL;
1133
ir_free_table(&dev->rc_map);
1135
device_del(&dev->dev);
1137
mutex_unlock(&dev->lock);
1140
EXPORT_SYMBOL_GPL(rc_register_device);
1142
void rc_unregister_device(struct rc_dev *dev)
1147
del_timer_sync(&dev->timer_keyup);
1149
if (dev->driver_type == RC_DRIVER_IR_RAW)
1150
ir_raw_event_unregister(dev);
1152
/* Freeing the table should also call the stop callback */
1153
ir_free_table(&dev->rc_map);
1154
IR_dprintk(1, "Freed keycode table\n");
1156
input_unregister_device(dev->input_dev);
1157
dev->input_dev = NULL;
1159
device_del(&dev->dev);
1161
rc_free_device(dev);
1164
EXPORT_SYMBOL_GPL(rc_unregister_device);
1167
* Init/exit code for the module. Basically, creates/removes /sys/class/rc
1170
static int __init rc_core_init(void)
1172
int rc = class_register(&ir_input_class);
1174
printk(KERN_ERR "rc_core: unable to register rc class\n");
1178
/* Initialize/load the decoders/keymap code that will be used */
1180
rc_map_register(&empty_map);
1185
static void __exit rc_core_exit(void)
1187
class_unregister(&ir_input_class);
1188
rc_map_unregister(&empty_map);
1191
module_init(rc_core_init);
1192
module_exit(rc_core_exit);
1194
int rc_core_debug; /* ir_debug level (0,1,2) */
1195
EXPORT_SYMBOL_GPL(rc_core_debug);
1196
module_param_named(debug, rc_core_debug, int, 0644);
1198
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
1199
MODULE_LICENSE("GPL");