349 lines
9.1 KiB
C
349 lines
9.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* HID driver for the apple ir device
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*
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* Original driver written by James McKenzie
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* Ported to recent 2.6 kernel versions by Greg Kroah-Hartman <gregkh@suse.de>
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* Updated to support newer remotes by Bastien Nocera <hadess@hadess.net>
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* Ported to HID subsystem by Benjamin Tissoires <benjamin.tissoires@gmail.com>
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*
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* Copyright (C) 2006 James McKenzie
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* Copyright (C) 2008 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2008 Novell Inc.
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* Copyright (C) 2010, 2012 Bastien Nocera <hadess@hadess.net>
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* Copyright (C) 2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
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* Copyright (C) 2013 Red Hat Inc. All Rights Reserved
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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MODULE_AUTHOR("James McKenzie");
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MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@redhat.com>");
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MODULE_DESCRIPTION("HID Apple IR remote controls");
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MODULE_LICENSE("GPL");
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#define KEY_MASK 0x0F
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#define TWO_PACKETS_MASK 0x40
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/*
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* James McKenzie has two devices both of which report the following
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* 25 87 ee 83 0a +
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* 25 87 ee 83 0c -
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* 25 87 ee 83 09 <<
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* 25 87 ee 83 06 >>
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* 25 87 ee 83 05 >"
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* 25 87 ee 83 03 menu
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* 26 00 00 00 00 for key repeat
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*/
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/*
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* Thomas Glanzmann reports the following responses
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* 25 87 ee ca 0b +
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* 25 87 ee ca 0d -
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* 25 87 ee ca 08 <<
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* 25 87 ee ca 07 >>
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* 25 87 ee ca 04 >"
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* 25 87 ee ca 02 menu
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* 26 00 00 00 00 for key repeat
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*
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* He also observes the following event sometimes
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* sent after a key is release, which I interpret
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* as a flat battery message
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* 25 87 e0 ca 06 flat battery
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*/
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/*
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* Alexandre Karpenko reports the following responses for Device ID 0x8242
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* 25 87 ee 47 0b +
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* 25 87 ee 47 0d -
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* 25 87 ee 47 08 <<
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* 25 87 ee 47 07 >>
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* 25 87 ee 47 04 >"
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* 25 87 ee 47 02 menu
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* 26 87 ee 47 ** for key repeat (** is the code of the key being held)
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*/
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/*
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* Bastien Nocera's remote
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* 25 87 ee 91 5f followed by
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* 25 87 ee 91 05 gives you >"
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*
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* 25 87 ee 91 5c followed by
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* 25 87 ee 91 05 gives you the middle button
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*/
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/*
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* Fabien Andre's remote
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* 25 87 ee a3 5e followed by
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* 25 87 ee a3 04 gives you >"
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*
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* 25 87 ee a3 5d followed by
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* 25 87 ee a3 04 gives you the middle button
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*/
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static const unsigned short appleir_key_table[] = {
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KEY_RESERVED,
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KEY_MENU,
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KEY_PLAYPAUSE,
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KEY_FORWARD,
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KEY_BACK,
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KEY_VOLUMEUP,
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KEY_VOLUMEDOWN,
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KEY_RESERVED,
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KEY_RESERVED,
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KEY_RESERVED,
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KEY_RESERVED,
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KEY_RESERVED,
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KEY_RESERVED,
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KEY_RESERVED,
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KEY_ENTER,
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KEY_PLAYPAUSE,
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KEY_RESERVED,
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};
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struct appleir {
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struct input_dev *input_dev;
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struct hid_device *hid;
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unsigned short keymap[ARRAY_SIZE(appleir_key_table)];
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struct timer_list key_up_timer; /* timer for key up */
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spinlock_t lock; /* protects .current_key */
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int current_key; /* the currently pressed key */
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int prev_key_idx; /* key index in a 2 packets message */
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};
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static int get_key(int data)
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{
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/*
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* The key is coded accross bits 2..9:
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*
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* 0x00 or 0x01 ( ) key: 0 -> KEY_RESERVED
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* 0x02 or 0x03 ( menu ) key: 1 -> KEY_MENU
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* 0x04 or 0x05 ( >" ) key: 2 -> KEY_PLAYPAUSE
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* 0x06 or 0x07 ( >> ) key: 3 -> KEY_FORWARD
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* 0x08 or 0x09 ( << ) key: 4 -> KEY_BACK
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* 0x0a or 0x0b ( + ) key: 5 -> KEY_VOLUMEUP
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* 0x0c or 0x0d ( - ) key: 6 -> KEY_VOLUMEDOWN
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* 0x0e or 0x0f ( ) key: 7 -> KEY_RESERVED
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* 0x50 or 0x51 ( ) key: 8 -> KEY_RESERVED
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* 0x52 or 0x53 ( ) key: 9 -> KEY_RESERVED
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* 0x54 or 0x55 ( ) key: 10 -> KEY_RESERVED
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* 0x56 or 0x57 ( ) key: 11 -> KEY_RESERVED
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* 0x58 or 0x59 ( ) key: 12 -> KEY_RESERVED
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* 0x5a or 0x5b ( ) key: 13 -> KEY_RESERVED
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* 0x5c or 0x5d ( middle ) key: 14 -> KEY_ENTER
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* 0x5e or 0x5f ( >" ) key: 15 -> KEY_PLAYPAUSE
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*
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* Packets starting with 0x5 are part of a two-packets message,
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* we notify the caller by sending a negative value.
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*/
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int key = (data >> 1) & KEY_MASK;
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if ((data & TWO_PACKETS_MASK))
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/* Part of a 2 packets-command */
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key = -key;
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return key;
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}
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static void key_up(struct hid_device *hid, struct appleir *appleir, int key)
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{
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input_report_key(appleir->input_dev, key, 0);
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input_sync(appleir->input_dev);
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}
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static void key_down(struct hid_device *hid, struct appleir *appleir, int key)
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{
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input_report_key(appleir->input_dev, key, 1);
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input_sync(appleir->input_dev);
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}
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static void battery_flat(struct appleir *appleir)
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{
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dev_err(&appleir->input_dev->dev, "possible flat battery?\n");
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}
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static void key_up_tick(struct timer_list *t)
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{
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struct appleir *appleir = from_timer(appleir, t, key_up_timer);
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struct hid_device *hid = appleir->hid;
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unsigned long flags;
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spin_lock_irqsave(&appleir->lock, flags);
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if (appleir->current_key) {
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key_up(hid, appleir, appleir->current_key);
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appleir->current_key = 0;
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}
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spin_unlock_irqrestore(&appleir->lock, flags);
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}
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static int appleir_raw_event(struct hid_device *hid, struct hid_report *report,
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u8 *data, int len)
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{
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struct appleir *appleir = hid_get_drvdata(hid);
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static const u8 keydown[] = { 0x25, 0x87, 0xee };
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static const u8 keyrepeat[] = { 0x26, };
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static const u8 flatbattery[] = { 0x25, 0x87, 0xe0 };
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unsigned long flags;
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if (len != 5)
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goto out;
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if (!memcmp(data, keydown, sizeof(keydown))) {
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int index;
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spin_lock_irqsave(&appleir->lock, flags);
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/*
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* If we already have a key down, take it up before marking
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* this one down
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*/
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if (appleir->current_key)
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key_up(hid, appleir, appleir->current_key);
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/* Handle dual packet commands */
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if (appleir->prev_key_idx > 0)
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index = appleir->prev_key_idx;
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else
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index = get_key(data[4]);
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if (index >= 0) {
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appleir->current_key = appleir->keymap[index];
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key_down(hid, appleir, appleir->current_key);
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/*
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* Remote doesn't do key up, either pull them up, in
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* the test above, or here set a timer which pulls
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* them up after 1/8 s
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*/
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mod_timer(&appleir->key_up_timer, jiffies + HZ / 8);
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appleir->prev_key_idx = 0;
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} else
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/* Remember key for next packet */
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appleir->prev_key_idx = -index;
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spin_unlock_irqrestore(&appleir->lock, flags);
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goto out;
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}
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appleir->prev_key_idx = 0;
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if (!memcmp(data, keyrepeat, sizeof(keyrepeat))) {
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key_down(hid, appleir, appleir->current_key);
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/*
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* Remote doesn't do key up, either pull them up, in the test
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* above, or here set a timer which pulls them up after 1/8 s
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*/
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mod_timer(&appleir->key_up_timer, jiffies + HZ / 8);
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goto out;
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}
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if (!memcmp(data, flatbattery, sizeof(flatbattery))) {
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battery_flat(appleir);
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/* Fall through */
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}
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out:
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/* let hidraw and hiddev handle the report */
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return 0;
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}
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static int appleir_input_configured(struct hid_device *hid,
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struct hid_input *hidinput)
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{
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struct input_dev *input_dev = hidinput->input;
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struct appleir *appleir = hid_get_drvdata(hid);
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int i;
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appleir->input_dev = input_dev;
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input_dev->keycode = appleir->keymap;
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input_dev->keycodesize = sizeof(unsigned short);
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input_dev->keycodemax = ARRAY_SIZE(appleir->keymap);
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input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
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memcpy(appleir->keymap, appleir_key_table, sizeof(appleir->keymap));
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for (i = 0; i < ARRAY_SIZE(appleir_key_table); i++)
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set_bit(appleir->keymap[i], input_dev->keybit);
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clear_bit(KEY_RESERVED, input_dev->keybit);
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return 0;
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}
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static int appleir_input_mapping(struct hid_device *hid,
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struct hid_input *hi, struct hid_field *field,
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struct hid_usage *usage, unsigned long **bit, int *max)
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{
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return -1;
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}
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static int appleir_probe(struct hid_device *hid, const struct hid_device_id *id)
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{
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int ret;
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struct appleir *appleir;
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appleir = kzalloc(sizeof(struct appleir), GFP_KERNEL);
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if (!appleir) {
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ret = -ENOMEM;
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goto allocfail;
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}
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appleir->hid = hid;
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/* force input as some remotes bypass the input registration */
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hid->quirks |= HID_QUIRK_HIDINPUT_FORCE;
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spin_lock_init(&appleir->lock);
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timer_setup(&appleir->key_up_timer, key_up_tick, 0);
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hid_set_drvdata(hid, appleir);
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ret = hid_parse(hid);
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if (ret) {
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hid_err(hid, "parse failed\n");
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goto fail;
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}
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ret = hid_hw_start(hid, HID_CONNECT_DEFAULT | HID_CONNECT_HIDDEV_FORCE);
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if (ret) {
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hid_err(hid, "hw start failed\n");
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goto fail;
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}
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return 0;
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fail:
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kfree(appleir);
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allocfail:
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return ret;
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}
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static void appleir_remove(struct hid_device *hid)
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{
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struct appleir *appleir = hid_get_drvdata(hid);
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hid_hw_stop(hid);
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del_timer_sync(&appleir->key_up_timer);
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kfree(appleir);
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}
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static const struct hid_device_id appleir_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL2) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL3) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL5) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, appleir_devices);
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static struct hid_driver appleir_driver = {
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.name = "appleir",
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.id_table = appleir_devices,
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.raw_event = appleir_raw_event,
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.input_configured = appleir_input_configured,
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.probe = appleir_probe,
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.remove = appleir_remove,
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.input_mapping = appleir_input_mapping,
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};
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module_hid_driver(appleir_driver);
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