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linux/drivers/hid/hid-appleir.c
Thomas Gleixner 9c92ab6191 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 285 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:37 +02:00

349 lines
9.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
/*
* 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
*/
#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(struct timer_list *t)
{
struct appleir *appleir = from_timer(appleir, t, key_up_timer);
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 int 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);
return 0;
}
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;
/* force input as some remotes bypass the input registration */
hid->quirks |= HID_QUIRK_HIDINPUT_FORCE;
spin_lock_init(&appleir->lock);
timer_setup(&appleir->key_up_timer, key_up_tick, 0);
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);
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