1 // SPDX-License-Identifier: GPL-2.0-only
3 * HID driver for the apple ir device
5 * Original driver written by James McKenzie
6 * Ported to recent 2.6 kernel versions by Greg Kroah-Hartman <gregkh@suse.de>
7 * Updated to support newer remotes by Bastien Nocera <hadess@hadess.net>
8 * Ported to HID subsystem by Benjamin Tissoires <benjamin.tissoires@gmail.com>
10 * Copyright (C) 2006 James McKenzie
11 * Copyright (C) 2008 Greg Kroah-Hartman <greg@kroah.com>
12 * Copyright (C) 2008 Novell Inc.
13 * Copyright (C) 2010, 2012 Bastien Nocera <hadess@hadess.net>
14 * Copyright (C) 2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
15 * Copyright (C) 2013 Red Hat Inc. All Rights Reserved
18 #include <linux/device.h>
19 #include <linux/hid.h>
20 #include <linux/module.h>
23 MODULE_AUTHOR("James McKenzie");
24 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@redhat.com>");
25 MODULE_DESCRIPTION("HID Apple IR remote controls");
26 MODULE_LICENSE("GPL");
29 #define TWO_PACKETS_MASK 0x40
32 * James McKenzie has two devices both of which report the following
39 * 26 00 00 00 00 for key repeat
43 * Thomas Glanzmann reports the following responses
50 * 26 00 00 00 00 for key repeat
52 * He also observes the following event sometimes
53 * sent after a key is release, which I interpret
54 * as a flat battery message
55 * 25 87 e0 ca 06 flat battery
59 * Alexandre Karpenko reports the following responses for Device ID 0x8242
66 * 26 87 ee 47 ** for key repeat (** is the code of the key being held)
70 * Bastien Nocera's remote
71 * 25 87 ee 91 5f followed by
72 * 25 87 ee 91 05 gives you >"
74 * 25 87 ee 91 5c followed by
75 * 25 87 ee 91 05 gives you the middle button
79 * Fabien Andre's remote
80 * 25 87 ee a3 5e followed by
81 * 25 87 ee a3 04 gives you >"
83 * 25 87 ee a3 5d followed by
84 * 25 87 ee a3 04 gives you the middle button
87 static const unsigned short appleir_key_table[] = {
108 struct input_dev *input_dev;
109 struct hid_device *hid;
110 unsigned short keymap[ARRAY_SIZE(appleir_key_table)];
111 struct timer_list key_up_timer; /* timer for key up */
112 spinlock_t lock; /* protects .current_key */
113 int current_key; /* the currently pressed key */
114 int prev_key_idx; /* key index in a 2 packets message */
117 static int get_key(int data)
120 * The key is coded accross bits 2..9:
122 * 0x00 or 0x01 ( ) key: 0 -> KEY_RESERVED
123 * 0x02 or 0x03 ( menu ) key: 1 -> KEY_MENU
124 * 0x04 or 0x05 ( >" ) key: 2 -> KEY_PLAYPAUSE
125 * 0x06 or 0x07 ( >> ) key: 3 -> KEY_FORWARD
126 * 0x08 or 0x09 ( << ) key: 4 -> KEY_BACK
127 * 0x0a or 0x0b ( + ) key: 5 -> KEY_VOLUMEUP
128 * 0x0c or 0x0d ( - ) key: 6 -> KEY_VOLUMEDOWN
129 * 0x0e or 0x0f ( ) key: 7 -> KEY_RESERVED
130 * 0x50 or 0x51 ( ) key: 8 -> KEY_RESERVED
131 * 0x52 or 0x53 ( ) key: 9 -> KEY_RESERVED
132 * 0x54 or 0x55 ( ) key: 10 -> KEY_RESERVED
133 * 0x56 or 0x57 ( ) key: 11 -> KEY_RESERVED
134 * 0x58 or 0x59 ( ) key: 12 -> KEY_RESERVED
135 * 0x5a or 0x5b ( ) key: 13 -> KEY_RESERVED
136 * 0x5c or 0x5d ( middle ) key: 14 -> KEY_ENTER
137 * 0x5e or 0x5f ( >" ) key: 15 -> KEY_PLAYPAUSE
139 * Packets starting with 0x5 are part of a two-packets message,
140 * we notify the caller by sending a negative value.
142 int key = (data >> 1) & KEY_MASK;
144 if ((data & TWO_PACKETS_MASK))
145 /* Part of a 2 packets-command */
151 static void key_up(struct hid_device *hid, struct appleir *appleir, int key)
153 input_report_key(appleir->input_dev, key, 0);
154 input_sync(appleir->input_dev);
157 static void key_down(struct hid_device *hid, struct appleir *appleir, int key)
159 input_report_key(appleir->input_dev, key, 1);
160 input_sync(appleir->input_dev);
163 static void battery_flat(struct appleir *appleir)
165 dev_err(&appleir->input_dev->dev, "possible flat battery?\n");
168 static void key_up_tick(struct timer_list *t)
170 struct appleir *appleir = from_timer(appleir, t, key_up_timer);
171 struct hid_device *hid = appleir->hid;
174 spin_lock_irqsave(&appleir->lock, flags);
175 if (appleir->current_key) {
176 key_up(hid, appleir, appleir->current_key);
177 appleir->current_key = 0;
179 spin_unlock_irqrestore(&appleir->lock, flags);
182 static int appleir_raw_event(struct hid_device *hid, struct hid_report *report,
185 struct appleir *appleir = hid_get_drvdata(hid);
186 static const u8 keydown[] = { 0x25, 0x87, 0xee };
187 static const u8 keyrepeat[] = { 0x26, };
188 static const u8 flatbattery[] = { 0x25, 0x87, 0xe0 };
194 if (!memcmp(data, keydown, sizeof(keydown))) {
197 spin_lock_irqsave(&appleir->lock, flags);
199 * If we already have a key down, take it up before marking
202 if (appleir->current_key)
203 key_up(hid, appleir, appleir->current_key);
205 /* Handle dual packet commands */
206 if (appleir->prev_key_idx > 0)
207 index = appleir->prev_key_idx;
209 index = get_key(data[4]);
212 appleir->current_key = appleir->keymap[index];
214 key_down(hid, appleir, appleir->current_key);
216 * Remote doesn't do key up, either pull them up, in
217 * the test above, or here set a timer which pulls
218 * them up after 1/8 s
220 mod_timer(&appleir->key_up_timer, jiffies + HZ / 8);
221 appleir->prev_key_idx = 0;
223 /* Remember key for next packet */
224 appleir->prev_key_idx = -index;
225 spin_unlock_irqrestore(&appleir->lock, flags);
229 appleir->prev_key_idx = 0;
231 if (!memcmp(data, keyrepeat, sizeof(keyrepeat))) {
232 key_down(hid, appleir, appleir->current_key);
234 * Remote doesn't do key up, either pull them up, in the test
235 * above, or here set a timer which pulls them up after 1/8 s
237 mod_timer(&appleir->key_up_timer, jiffies + HZ / 8);
241 if (!memcmp(data, flatbattery, sizeof(flatbattery))) {
242 battery_flat(appleir);
247 /* let hidraw and hiddev handle the report */
251 static int appleir_input_configured(struct hid_device *hid,
252 struct hid_input *hidinput)
254 struct input_dev *input_dev = hidinput->input;
255 struct appleir *appleir = hid_get_drvdata(hid);
258 appleir->input_dev = input_dev;
260 input_dev->keycode = appleir->keymap;
261 input_dev->keycodesize = sizeof(unsigned short);
262 input_dev->keycodemax = ARRAY_SIZE(appleir->keymap);
264 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
266 memcpy(appleir->keymap, appleir_key_table, sizeof(appleir->keymap));
267 for (i = 0; i < ARRAY_SIZE(appleir_key_table); i++)
268 set_bit(appleir->keymap[i], input_dev->keybit);
269 clear_bit(KEY_RESERVED, input_dev->keybit);
274 static int appleir_input_mapping(struct hid_device *hid,
275 struct hid_input *hi, struct hid_field *field,
276 struct hid_usage *usage, unsigned long **bit, int *max)
281 static int appleir_probe(struct hid_device *hid, const struct hid_device_id *id)
284 struct appleir *appleir;
286 appleir = devm_kzalloc(&hid->dev, sizeof(struct appleir), GFP_KERNEL);
292 /* force input as some remotes bypass the input registration */
293 hid->quirks |= HID_QUIRK_HIDINPUT_FORCE;
295 spin_lock_init(&appleir->lock);
296 timer_setup(&appleir->key_up_timer, key_up_tick, 0);
298 hid_set_drvdata(hid, appleir);
300 ret = hid_parse(hid);
302 hid_err(hid, "parse failed\n");
306 ret = hid_hw_start(hid, HID_CONNECT_DEFAULT | HID_CONNECT_HIDDEV_FORCE);
308 hid_err(hid, "hw start failed\n");
314 devm_kfree(&hid->dev, appleir);
318 static void appleir_remove(struct hid_device *hid)
320 struct appleir *appleir = hid_get_drvdata(hid);
322 del_timer_sync(&appleir->key_up_timer);
325 static const struct hid_device_id appleir_devices[] = {
326 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL) },
327 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL2) },
328 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL3) },
329 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
330 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL5) },
333 MODULE_DEVICE_TABLE(hid, appleir_devices);
335 static struct hid_driver appleir_driver = {
337 .id_table = appleir_devices,
338 .raw_event = appleir_raw_event,
339 .input_configured = appleir_input_configured,
340 .probe = appleir_probe,
341 .remove = appleir_remove,
342 .input_mapping = appleir_input_mapping,
344 module_hid_driver(appleir_driver);