243 lines
5.9 KiB
C
243 lines
5.9 KiB
C
/*
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* ION iCade input driver
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*
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* Copyright (c) 2012 Bastien Nocera <hadess@hadess.net>
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* Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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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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/*
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* ↑ A C Y L
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* ← →
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* ↓ B X Z R
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*
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*
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* UP ON,OFF = w,e
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* RT ON,OFF = d,c
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* DN ON,OFF = x,z
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* LT ON,OFF = a,q
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* A ON,OFF = y,t
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* B ON,OFF = h,r
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* C ON,OFF = u,f
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* X ON,OFF = j,n
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* Y ON,OFF = i,m
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* Z ON,OFF = k,p
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* L ON,OFF = o,g
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* R ON,OFF = l,v
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*/
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/* The translation code uses HID usage instead of input layer
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* keys. This code generates a lookup table that makes
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* translation quick.
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*
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* #include <linux/input.h>
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* #include <stdio.h>
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* #include <assert.h>
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*
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* #define unk KEY_UNKNOWN
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*
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* < copy of hid_keyboard[] from hid-input.c >
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*
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* struct icade_key_translation {
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* int from;
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* const char *to;
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* int press;
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* };
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*
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* static const struct icade_key_translation icade_keys[] = {
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* { KEY_W, "KEY_UP", 1 },
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* { KEY_E, "KEY_UP", 0 },
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* { KEY_D, "KEY_RIGHT", 1 },
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* { KEY_C, "KEY_RIGHT", 0 },
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* { KEY_X, "KEY_DOWN", 1 },
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* { KEY_Z, "KEY_DOWN", 0 },
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* { KEY_A, "KEY_LEFT", 1 },
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* { KEY_Q, "KEY_LEFT", 0 },
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* { KEY_Y, "BTN_A", 1 },
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* { KEY_T, "BTN_A", 0 },
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* { KEY_H, "BTN_B", 1 },
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* { KEY_R, "BTN_B", 0 },
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* { KEY_U, "BTN_C", 1 },
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* { KEY_F, "BTN_C", 0 },
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* { KEY_J, "BTN_X", 1 },
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* { KEY_N, "BTN_X", 0 },
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* { KEY_I, "BTN_Y", 1 },
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* { KEY_M, "BTN_Y", 0 },
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* { KEY_K, "BTN_Z", 1 },
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* { KEY_P, "BTN_Z", 0 },
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* { KEY_O, "BTN_THUMBL", 1 },
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* { KEY_G, "BTN_THUMBL", 0 },
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* { KEY_L, "BTN_THUMBR", 1 },
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* { KEY_V, "BTN_THUMBR", 0 },
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*
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* { }
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* };
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*
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* static int
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* usage_for_key (int key)
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* {
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* int i;
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* for (i = 0; i < 256; i++) {
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* if (hid_keyboard[i] == key)
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* return i;
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* }
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* assert(0);
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* }
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*
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* int main (int argc, char **argv)
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* {
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* const struct icade_key_translation *trans;
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* int max_usage = 0;
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*
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* for (trans = icade_keys; trans->from; trans++) {
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* int usage = usage_for_key (trans->from);
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* max_usage = usage > max_usage ? usage : max_usage;
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* }
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*
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* printf ("#define ICADE_MAX_USAGE %d\n\n", max_usage);
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* printf ("struct icade_key {\n");
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* printf ("\tu16 to;\n");
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* printf ("\tu8 press:1;\n");
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* printf ("};\n\n");
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* printf ("static const struct icade_key "
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* "icade_usage_table[%d] = {\n", max_usage + 1);
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* for (trans = icade_keys; trans->from; trans++) {
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* printf ("\t[%d] = { %s, %d },\n",
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* usage_for_key (trans->from), trans->to, trans->press);
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* }
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* printf ("};\n");
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*
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* return 0;
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* }
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*/
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#define ICADE_MAX_USAGE 29
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struct icade_key {
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u16 to;
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u8 press:1;
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};
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static const struct icade_key icade_usage_table[30] = {
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[26] = { KEY_UP, 1 },
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[8] = { KEY_UP, 0 },
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[7] = { KEY_RIGHT, 1 },
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[6] = { KEY_RIGHT, 0 },
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[27] = { KEY_DOWN, 1 },
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[29] = { KEY_DOWN, 0 },
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[4] = { KEY_LEFT, 1 },
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[20] = { KEY_LEFT, 0 },
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[28] = { BTN_A, 1 },
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[23] = { BTN_A, 0 },
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[11] = { BTN_B, 1 },
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[21] = { BTN_B, 0 },
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[24] = { BTN_C, 1 },
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[9] = { BTN_C, 0 },
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[13] = { BTN_X, 1 },
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[17] = { BTN_X, 0 },
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[12] = { BTN_Y, 1 },
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[16] = { BTN_Y, 0 },
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[14] = { BTN_Z, 1 },
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[19] = { BTN_Z, 0 },
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[18] = { BTN_THUMBL, 1 },
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[10] = { BTN_THUMBL, 0 },
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[15] = { BTN_THUMBR, 1 },
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[25] = { BTN_THUMBR, 0 },
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};
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static const struct icade_key *icade_find_translation(u16 from)
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{
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if (from < 0 || from > ICADE_MAX_USAGE)
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return NULL;
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return &icade_usage_table[from];
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}
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static int icade_event(struct hid_device *hdev, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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const struct icade_key *trans;
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if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
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!usage->type)
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return 0;
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/* We ignore the fake key up, and act only on key down */
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if (!value)
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return 1;
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trans = icade_find_translation(usage->hid & HID_USAGE);
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if (!trans)
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return 1;
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input_event(field->hidinput->input, usage->type,
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trans->to, trans->press);
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return 1;
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}
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static int icade_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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const struct icade_key *trans;
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if ((usage->hid & HID_USAGE_PAGE) == HID_UP_KEYBOARD) {
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trans = icade_find_translation(usage->hid & HID_USAGE);
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if (!trans)
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return -1;
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hid_map_usage(hi, usage, bit, max, EV_KEY, trans->to);
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set_bit(trans->to, hi->input->keybit);
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return 1;
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}
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/* ignore others */
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return -1;
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}
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static int icade_input_mapped(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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if (usage->type == EV_KEY)
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set_bit(usage->type, hi->input->evbit);
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return -1;
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}
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static const struct hid_device_id icade_devices[] = {
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, icade_devices);
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static struct hid_driver icade_driver = {
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.name = "icade",
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.id_table = icade_devices,
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.event = icade_event,
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.input_mapped = icade_input_mapped,
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.input_mapping = icade_input_mapping,
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};
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module_hid_driver(icade_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
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MODULE_DESCRIPTION("ION iCade input driver");
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