linux/drivers/hid/hid-icade.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

240 lines
5.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ION iCade input driver
*
* Copyright (c) 2012 Bastien Nocera <hadess@hadess.net>
* Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
*/
/*
*/
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
/*
* ↑ A C Y L
* ← →
* ↓ B X Z R
*
*
* UP ON,OFF = w,e
* RT ON,OFF = d,c
* DN ON,OFF = x,z
* LT ON,OFF = a,q
* A ON,OFF = y,t
* B ON,OFF = h,r
* C ON,OFF = u,f
* X ON,OFF = j,n
* Y ON,OFF = i,m
* Z ON,OFF = k,p
* L ON,OFF = o,g
* R ON,OFF = l,v
*/
/* The translation code uses HID usage instead of input layer
* keys. This code generates a lookup table that makes
* translation quick.
*
* #include <linux/input.h>
* #include <stdio.h>
* #include <assert.h>
*
* #define unk KEY_UNKNOWN
*
* < copy of hid_keyboard[] from hid-input.c >
*
* struct icade_key_translation {
* int from;
* const char *to;
* int press;
* };
*
* static const struct icade_key_translation icade_keys[] = {
* { KEY_W, "KEY_UP", 1 },
* { KEY_E, "KEY_UP", 0 },
* { KEY_D, "KEY_RIGHT", 1 },
* { KEY_C, "KEY_RIGHT", 0 },
* { KEY_X, "KEY_DOWN", 1 },
* { KEY_Z, "KEY_DOWN", 0 },
* { KEY_A, "KEY_LEFT", 1 },
* { KEY_Q, "KEY_LEFT", 0 },
* { KEY_Y, "BTN_A", 1 },
* { KEY_T, "BTN_A", 0 },
* { KEY_H, "BTN_B", 1 },
* { KEY_R, "BTN_B", 0 },
* { KEY_U, "BTN_C", 1 },
* { KEY_F, "BTN_C", 0 },
* { KEY_J, "BTN_X", 1 },
* { KEY_N, "BTN_X", 0 },
* { KEY_I, "BTN_Y", 1 },
* { KEY_M, "BTN_Y", 0 },
* { KEY_K, "BTN_Z", 1 },
* { KEY_P, "BTN_Z", 0 },
* { KEY_O, "BTN_THUMBL", 1 },
* { KEY_G, "BTN_THUMBL", 0 },
* { KEY_L, "BTN_THUMBR", 1 },
* { KEY_V, "BTN_THUMBR", 0 },
*
* { }
* };
*
* static int
* usage_for_key (int key)
* {
* int i;
* for (i = 0; i < 256; i++) {
* if (hid_keyboard[i] == key)
* return i;
* }
* assert(0);
* }
*
* int main (int argc, char **argv)
* {
* const struct icade_key_translation *trans;
* int max_usage = 0;
*
* for (trans = icade_keys; trans->from; trans++) {
* int usage = usage_for_key (trans->from);
* max_usage = usage > max_usage ? usage : max_usage;
* }
*
* printf ("#define ICADE_MAX_USAGE %d\n\n", max_usage);
* printf ("struct icade_key {\n");
* printf ("\tu16 to;\n");
* printf ("\tu8 press:1;\n");
* printf ("};\n\n");
* printf ("static const struct icade_key "
* "icade_usage_table[%d] = {\n", max_usage + 1);
* for (trans = icade_keys; trans->from; trans++) {
* printf ("\t[%d] = { %s, %d },\n",
* usage_for_key (trans->from), trans->to, trans->press);
* }
* printf ("};\n");
*
* return 0;
* }
*/
#define ICADE_MAX_USAGE 29
struct icade_key {
u16 to;
u8 press:1;
};
static const struct icade_key icade_usage_table[30] = {
[26] = { KEY_UP, 1 },
[8] = { KEY_UP, 0 },
[7] = { KEY_RIGHT, 1 },
[6] = { KEY_RIGHT, 0 },
[27] = { KEY_DOWN, 1 },
[29] = { KEY_DOWN, 0 },
[4] = { KEY_LEFT, 1 },
[20] = { KEY_LEFT, 0 },
[28] = { BTN_A, 1 },
[23] = { BTN_A, 0 },
[11] = { BTN_B, 1 },
[21] = { BTN_B, 0 },
[24] = { BTN_C, 1 },
[9] = { BTN_C, 0 },
[13] = { BTN_X, 1 },
[17] = { BTN_X, 0 },
[12] = { BTN_Y, 1 },
[16] = { BTN_Y, 0 },
[14] = { BTN_Z, 1 },
[19] = { BTN_Z, 0 },
[18] = { BTN_THUMBL, 1 },
[10] = { BTN_THUMBL, 0 },
[15] = { BTN_THUMBR, 1 },
[25] = { BTN_THUMBR, 0 },
};
static const struct icade_key *icade_find_translation(u16 from)
{
if (from > ICADE_MAX_USAGE)
return NULL;
return &icade_usage_table[from];
}
static int icade_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
const struct icade_key *trans;
if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
!usage->type)
return 0;
/* We ignore the fake key up, and act only on key down */
if (!value)
return 1;
trans = icade_find_translation(usage->hid & HID_USAGE);
if (!trans)
return 1;
input_event(field->hidinput->input, usage->type,
trans->to, trans->press);
return 1;
}
static int icade_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
const struct icade_key *trans;
if ((usage->hid & HID_USAGE_PAGE) == HID_UP_KEYBOARD) {
trans = icade_find_translation(usage->hid & HID_USAGE);
if (!trans)
return -1;
hid_map_usage(hi, usage, bit, max, EV_KEY, trans->to);
set_bit(trans->to, hi->input->keybit);
return 1;
}
/* ignore others */
return -1;
}
static int icade_input_mapped(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
if (usage->type == EV_KEY)
set_bit(usage->type, hi->input->evbit);
return -1;
}
static const struct hid_device_id icade_devices[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) },
{ }
};
MODULE_DEVICE_TABLE(hid, icade_devices);
static struct hid_driver icade_driver = {
.name = "icade",
.id_table = icade_devices,
.event = icade_event,
.input_mapped = icade_input_mapped,
.input_mapping = icade_input_mapping,
};
module_hid_driver(icade_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
MODULE_DESCRIPTION("ION iCade input driver");