1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ION iCade input driver
5 * Copyright (c) 2012 Bastien Nocera <hadess@hadess.net>
6 * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
12 #include <linux/device.h>
13 #include <linux/hid.h>
14 #include <linux/module.h>
38 /* The translation code uses HID usage instead of input layer
39 * keys. This code generates a lookup table that makes
42 * #include <linux/input.h>
46 * #define unk KEY_UNKNOWN
48 * < copy of hid_keyboard[] from hid-input.c >
50 * struct icade_key_translation {
56 * static const struct icade_key_translation icade_keys[] = {
57 * { KEY_W, "KEY_UP", 1 },
58 * { KEY_E, "KEY_UP", 0 },
59 * { KEY_D, "KEY_RIGHT", 1 },
60 * { KEY_C, "KEY_RIGHT", 0 },
61 * { KEY_X, "KEY_DOWN", 1 },
62 * { KEY_Z, "KEY_DOWN", 0 },
63 * { KEY_A, "KEY_LEFT", 1 },
64 * { KEY_Q, "KEY_LEFT", 0 },
65 * { KEY_Y, "BTN_A", 1 },
66 * { KEY_T, "BTN_A", 0 },
67 * { KEY_H, "BTN_B", 1 },
68 * { KEY_R, "BTN_B", 0 },
69 * { KEY_U, "BTN_C", 1 },
70 * { KEY_F, "BTN_C", 0 },
71 * { KEY_J, "BTN_X", 1 },
72 * { KEY_N, "BTN_X", 0 },
73 * { KEY_I, "BTN_Y", 1 },
74 * { KEY_M, "BTN_Y", 0 },
75 * { KEY_K, "BTN_Z", 1 },
76 * { KEY_P, "BTN_Z", 0 },
77 * { KEY_O, "BTN_THUMBL", 1 },
78 * { KEY_G, "BTN_THUMBL", 0 },
79 * { KEY_L, "BTN_THUMBR", 1 },
80 * { KEY_V, "BTN_THUMBR", 0 },
86 * usage_for_key (int key)
89 * for (i = 0; i < 256; i++) {
90 * if (hid_keyboard[i] == key)
96 * int main (int argc, char **argv)
98 * const struct icade_key_translation *trans;
101 * for (trans = icade_keys; trans->from; trans++) {
102 * int usage = usage_for_key (trans->from);
103 * max_usage = usage > max_usage ? usage : max_usage;
106 * printf ("#define ICADE_MAX_USAGE %d\n\n", max_usage);
107 * printf ("struct icade_key {\n");
108 * printf ("\tu16 to;\n");
109 * printf ("\tu8 press:1;\n");
111 * printf ("static const struct icade_key "
112 * "icade_usage_table[%d] = {\n", max_usage + 1);
113 * for (trans = icade_keys; trans->from; trans++) {
114 * printf ("\t[%d] = { %s, %d },\n",
115 * usage_for_key (trans->from), trans->to, trans->press);
123 #define ICADE_MAX_USAGE 29
130 static const struct icade_key icade_usage_table[30] = {
131 [26] = { KEY_UP, 1 },
133 [7] = { KEY_RIGHT, 1 },
134 [6] = { KEY_RIGHT, 0 },
135 [27] = { KEY_DOWN, 1 },
136 [29] = { KEY_DOWN, 0 },
137 [4] = { KEY_LEFT, 1 },
138 [20] = { KEY_LEFT, 0 },
151 [18] = { BTN_THUMBL, 1 },
152 [10] = { BTN_THUMBL, 0 },
153 [15] = { BTN_THUMBR, 1 },
154 [25] = { BTN_THUMBR, 0 },
157 static const struct icade_key *icade_find_translation(u16 from)
159 if (from > ICADE_MAX_USAGE)
161 return &icade_usage_table[from];
164 static int icade_event(struct hid_device *hdev, struct hid_field *field,
165 struct hid_usage *usage, __s32 value)
167 const struct icade_key *trans;
169 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
173 /* We ignore the fake key up, and act only on key down */
177 trans = icade_find_translation(usage->hid & HID_USAGE);
182 input_event(field->hidinput->input, usage->type,
183 trans->to, trans->press);
188 static int icade_input_mapping(struct hid_device *hdev, struct hid_input *hi,
189 struct hid_field *field, struct hid_usage *usage,
190 unsigned long **bit, int *max)
192 const struct icade_key *trans;
194 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_KEYBOARD) {
195 trans = icade_find_translation(usage->hid & HID_USAGE);
200 hid_map_usage(hi, usage, bit, max, EV_KEY, trans->to);
201 set_bit(trans->to, hi->input->keybit);
211 static int icade_input_mapped(struct hid_device *hdev, struct hid_input *hi,
212 struct hid_field *field, struct hid_usage *usage,
213 unsigned long **bit, int *max)
215 if (usage->type == EV_KEY)
216 set_bit(usage->type, hi->input->evbit);
221 static const struct hid_device_id icade_devices[] = {
222 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) },
226 MODULE_DEVICE_TABLE(hid, icade_devices);
228 static struct hid_driver icade_driver = {
230 .id_table = icade_devices,
231 .event = icade_event,
232 .input_mapped = icade_input_mapped,
233 .input_mapping = icade_input_mapping,
235 module_hid_driver(icade_driver);
237 MODULE_LICENSE("GPL");
238 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
239 MODULE_DESCRIPTION("ION iCade input driver");