--- /dev/null
+/*
+ * HID driver for the apple ir device
+ *
+ * Original driver written by James McKenzie
+ * Ported to recent 2.6 kernel versions by Greg Kroah-Hartman <gregkh@suse.de>
+ * Updated to support newer remotes by Bastien Nocera <hadess@hadess.net>
+ * Ported to HID subsystem by Benjamin Tissoires <benjamin.tissoires@gmail.com>
+ *
+ * Copyright (C) 2006 James McKenzie
+ * Copyright (C) 2008 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2008 Novell Inc.
+ * Copyright (C) 2010, 2012 Bastien Nocera <hadess@hadess.net>
+ * Copyright (C) 2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
+ * Copyright (C) 2013 Red Hat Inc. All Rights Reserved
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include "hid-ids.h"
+
+MODULE_AUTHOR("James McKenzie");
+MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@redhat.com>");
+MODULE_DESCRIPTION("HID Apple IR remote controls");
+MODULE_LICENSE("GPL");
+
+#define KEY_MASK 0x0F
+#define TWO_PACKETS_MASK 0x40
+
+/*
+ * James McKenzie has two devices both of which report the following
+ * 25 87 ee 83 0a +
+ * 25 87 ee 83 0c -
+ * 25 87 ee 83 09 <<
+ * 25 87 ee 83 06 >>
+ * 25 87 ee 83 05 >"
+ * 25 87 ee 83 03 menu
+ * 26 00 00 00 00 for key repeat
+ */
+
+/*
+ * Thomas Glanzmann reports the following responses
+ * 25 87 ee ca 0b +
+ * 25 87 ee ca 0d -
+ * 25 87 ee ca 08 <<
+ * 25 87 ee ca 07 >>
+ * 25 87 ee ca 04 >"
+ * 25 87 ee ca 02 menu
+ * 26 00 00 00 00 for key repeat
+ *
+ * He also observes the following event sometimes
+ * sent after a key is release, which I interpret
+ * as a flat battery message
+ * 25 87 e0 ca 06 flat battery
+ */
+
+/*
+ * Alexandre Karpenko reports the following responses for Device ID 0x8242
+ * 25 87 ee 47 0b +
+ * 25 87 ee 47 0d -
+ * 25 87 ee 47 08 <<
+ * 25 87 ee 47 07 >>
+ * 25 87 ee 47 04 >"
+ * 25 87 ee 47 02 menu
+ * 26 87 ee 47 ** for key repeat (** is the code of the key being held)
+ */
+
+/*
+ * Bastien Nocera's remote
+ * 25 87 ee 91 5f followed by
+ * 25 87 ee 91 05 gives you >"
+ *
+ * 25 87 ee 91 5c followed by
+ * 25 87 ee 91 05 gives you the middle button
+ */
+
+/*
+ * Fabien Andre's remote
+ * 25 87 ee a3 5e followed by
+ * 25 87 ee a3 04 gives you >"
+ *
+ * 25 87 ee a3 5d followed by
+ * 25 87 ee a3 04 gives you the middle button
+ */
+
+static const unsigned short appleir_key_table[] = {
+ KEY_RESERVED,
+ KEY_MENU,
+ KEY_PLAYPAUSE,
+ KEY_FORWARD,
+ KEY_BACK,
+ KEY_VOLUMEUP,
+ KEY_VOLUMEDOWN,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_ENTER,
+ KEY_PLAYPAUSE,
+ KEY_RESERVED,
+};
+
+struct appleir {
+ struct input_dev *input_dev;
+ struct hid_device *hid;
+ unsigned short keymap[ARRAY_SIZE(appleir_key_table)];
+ struct timer_list key_up_timer; /* timer for key up */
+ spinlock_t lock; /* protects .current_key */
+ int current_key; /* the currently pressed key */
+ int prev_key_idx; /* key index in a 2 packets message */
+};
+
+static int get_key(int data)
+{
+ /*
+ * The key is coded accross bits 2..9:
+ *
+ * 0x00 or 0x01 ( ) key: 0 -> KEY_RESERVED
+ * 0x02 or 0x03 ( menu ) key: 1 -> KEY_MENU
+ * 0x04 or 0x05 ( >" ) key: 2 -> KEY_PLAYPAUSE
+ * 0x06 or 0x07 ( >> ) key: 3 -> KEY_FORWARD
+ * 0x08 or 0x09 ( << ) key: 4 -> KEY_BACK
+ * 0x0a or 0x0b ( + ) key: 5 -> KEY_VOLUMEUP
+ * 0x0c or 0x0d ( - ) key: 6 -> KEY_VOLUMEDOWN
+ * 0x0e or 0x0f ( ) key: 7 -> KEY_RESERVED
+ * 0x50 or 0x51 ( ) key: 8 -> KEY_RESERVED
+ * 0x52 or 0x53 ( ) key: 9 -> KEY_RESERVED
+ * 0x54 or 0x55 ( ) key: 10 -> KEY_RESERVED
+ * 0x56 or 0x57 ( ) key: 11 -> KEY_RESERVED
+ * 0x58 or 0x59 ( ) key: 12 -> KEY_RESERVED
+ * 0x5a or 0x5b ( ) key: 13 -> KEY_RESERVED
+ * 0x5c or 0x5d ( middle ) key: 14 -> KEY_ENTER
+ * 0x5e or 0x5f ( >" ) key: 15 -> KEY_PLAYPAUSE
+ *
+ * Packets starting with 0x5 are part of a two-packets message,
+ * we notify the caller by sending a negative value.
+ */
+ int key = (data >> 1) & KEY_MASK;
+
+ if ((data & TWO_PACKETS_MASK))
+ /* Part of a 2 packets-command */
+ key = -key;
+
+ return key;
+}
+
+static void key_up(struct hid_device *hid, struct appleir *appleir, int key)
+{
+ input_report_key(appleir->input_dev, key, 0);
+ input_sync(appleir->input_dev);
+}
+
+static void key_down(struct hid_device *hid, struct appleir *appleir, int key)
+{
+ input_report_key(appleir->input_dev, key, 1);
+ input_sync(appleir->input_dev);
+}
+
+static void battery_flat(struct appleir *appleir)
+{
+ dev_err(&appleir->input_dev->dev, "possible flat battery?\n");
+}
+
+static void key_up_tick(unsigned long data)
+{
+ struct appleir *appleir = (struct appleir *)data;
+ struct hid_device *hid = appleir->hid;
+ unsigned long flags;
+
+ spin_lock_irqsave(&appleir->lock, flags);
+ if (appleir->current_key) {
+ key_up(hid, appleir, appleir->current_key);
+ appleir->current_key = 0;
+ }
+ spin_unlock_irqrestore(&appleir->lock, flags);
+}
+
+static int appleir_raw_event(struct hid_device *hid, struct hid_report *report,
+ u8 *data, int len)
+{
+ struct appleir *appleir = hid_get_drvdata(hid);
+ static const u8 keydown[] = { 0x25, 0x87, 0xee };
+ static const u8 keyrepeat[] = { 0x26, };
+ static const u8 flatbattery[] = { 0x25, 0x87, 0xe0 };
+ unsigned long flags;
+
+ if (len != 5)
+ goto out;
+
+ if (!memcmp(data, keydown, sizeof(keydown))) {
+ int index;
+
+ spin_lock_irqsave(&appleir->lock, flags);
+ /*
+ * If we already have a key down, take it up before marking
+ * this one down
+ */
+ if (appleir->current_key)
+ key_up(hid, appleir, appleir->current_key);
+
+ /* Handle dual packet commands */
+ if (appleir->prev_key_idx > 0)
+ index = appleir->prev_key_idx;
+ else
+ index = get_key(data[4]);
+
+ if (index >= 0) {
+ appleir->current_key = appleir->keymap[index];
+
+ key_down(hid, appleir, appleir->current_key);
+ /*
+ * Remote doesn't do key up, either pull them up, in
+ * the test above, or here set a timer which pulls
+ * them up after 1/8 s
+ */
+ mod_timer(&appleir->key_up_timer, jiffies + HZ / 8);
+ appleir->prev_key_idx = 0;
+ } else
+ /* Remember key for next packet */
+ appleir->prev_key_idx = -index;
+ spin_unlock_irqrestore(&appleir->lock, flags);
+ goto out;
+ }
+
+ appleir->prev_key_idx = 0;
+
+ if (!memcmp(data, keyrepeat, sizeof(keyrepeat))) {
+ key_down(hid, appleir, appleir->current_key);
+ /*
+ * Remote doesn't do key up, either pull them up, in the test
+ * above, or here set a timer which pulls them up after 1/8 s
+ */
+ mod_timer(&appleir->key_up_timer, jiffies + HZ / 8);
+ goto out;
+ }
+
+ if (!memcmp(data, flatbattery, sizeof(flatbattery))) {
+ battery_flat(appleir);
+ /* Fall through */
+ }
+
+out:
+ /* let hidraw and hiddev handle the report */
+ return 0;
+}
+
+static void appleir_input_configured(struct hid_device *hid,
+ struct hid_input *hidinput)
+{
+ struct input_dev *input_dev = hidinput->input;
+ struct appleir *appleir = hid_get_drvdata(hid);
+ int i;
+
+ appleir->input_dev = input_dev;
+
+ input_dev->keycode = appleir->keymap;
+ input_dev->keycodesize = sizeof(unsigned short);
+ input_dev->keycodemax = ARRAY_SIZE(appleir->keymap);
+
+ input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
+
+ memcpy(appleir->keymap, appleir_key_table, sizeof(appleir->keymap));
+ for (i = 0; i < ARRAY_SIZE(appleir_key_table); i++)
+ set_bit(appleir->keymap[i], input_dev->keybit);
+ clear_bit(KEY_RESERVED, input_dev->keybit);
+}
+
+static int appleir_input_mapping(struct hid_device *hid,
+ struct hid_input *hi, struct hid_field *field,
+ struct hid_usage *usage, unsigned long **bit, int *max)
+{
+ return -1;
+}
+
+static int appleir_probe(struct hid_device *hid, const struct hid_device_id *id)
+{
+ int ret;
+ struct appleir *appleir;
+
+ appleir = kzalloc(sizeof(struct appleir), GFP_KERNEL);
+ if (!appleir) {
+ ret = -ENOMEM;
+ goto allocfail;
+ }
+
+ appleir->hid = hid;
+
+ spin_lock_init(&appleir->lock);
+ setup_timer(&appleir->key_up_timer,
+ key_up_tick, (unsigned long) appleir);
+
+ hid_set_drvdata(hid, appleir);
+
+ ret = hid_parse(hid);
+ if (ret) {
+ hid_err(hid, "parse failed\n");
+ goto fail;
+ }
+
+ ret = hid_hw_start(hid, HID_CONNECT_DEFAULT | HID_CONNECT_HIDDEV_FORCE);
+ if (ret) {
+ hid_err(hid, "hw start failed\n");
+ goto fail;
+ }
+
+ return 0;
+fail:
+ kfree(appleir);
+allocfail:
+ return ret;
+}
+
+static void appleir_remove(struct hid_device *hid)
+{
+ struct appleir *appleir = hid_get_drvdata(hid);
+ hid_hw_stop(hid);
+ del_timer_sync(&appleir->key_up_timer);
+ kfree(appleir);
+}
+
+static const struct hid_device_id appleir_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL2) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL3) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL5) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, appleir_devices);
+
+static struct hid_driver appleir_driver = {
+ .name = "appleir",
+ .id_table = appleir_devices,
+ .raw_event = appleir_raw_event,
+ .input_configured = appleir_input_configured,
+ .probe = appleir_probe,
+ .remove = appleir_remove,
+ .input_mapping = appleir_input_mapping,
+};
+module_hid_driver(appleir_driver);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff