2 * Force feedback support for Holtek On Line Grip based gamepads
4 * These include at least a Brazilian "Clone Joypad Super Power Fire"
5 * which uses vendor ID 0x1241 and identifies as "HOLTEK On Line Grip".
7 * Copyright (c) 2011 Anssi Hannula <anssi.hannula@iki.fi>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/hid.h>
27 #include <linux/input.h>
28 #include <linux/slab.h>
29 #include <linux/usb.h>
33 #ifdef CONFIG_HOLTEK_FF
34 #include "usbhid/usbhid.h"
36 MODULE_LICENSE("GPL");
37 MODULE_AUTHOR("Anssi Hannula <anssi.hannula@iki.fi>");
38 MODULE_DESCRIPTION("Force feedback support for Holtek On Line Grip based devices");
41 * These commands and parameters are currently known:
44 * 01 set effect parameters
45 * 02 play specified effect
46 * 03 stop specified effect
49 * (the difference between 04 and 06 isn't known; win driver
50 * sends 06,04 on application init, and 06 otherwise)
52 * Commands 01 and 02 need to be sent as pairs, i.e. you need to send 01
55 * The rest of the bytes are parameters. Command 01 takes all of them, and
56 * commands 02,03 take only the effect id.
59 * bits 0-3: effect id:
60 * 1: very strong rumble
61 * 2: periodic rumble, short intervals
62 * 3: very strong rumble
63 * 4: periodic rumble, long intervals
64 * 5: weak periodic rumble, long intervals
65 * 6: weak periodic rumble, short intervals
66 * 7: periodic rumble, short intervals
67 * 8: strong periodic rumble, short intervals
68 * 9: very strong rumble
70 * b: very strong periodic rumble, very short intervals
72 * bit 6: right (weak) motor enabled
73 * bit 7: left (strong) motor enabled
75 * bytes 2-3: time in milliseconds, big-endian
76 * bytes 5-6: unknown (win driver seems to use at least 10e0 with effect 1
77 * and 0014 with effect 6)
79 * bits 0-3: effect magnitude
82 #define HOLTEKFF_MSG_LENGTH 7
84 static const u8 start_effect_1[] = { 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
85 static const u8 stop_all4[] = { 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
86 static const u8 stop_all6[] = { 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
88 struct holtekff_device {
89 struct hid_field *field;
92 static void holtekff_send(struct holtekff_device *holtekff,
93 struct hid_device *hid,
94 const u8 data[HOLTEKFF_MSG_LENGTH])
98 for (i = 0; i < HOLTEKFF_MSG_LENGTH; i++) {
99 holtekff->field->value[i] = data[i];
102 dbg_hid("sending %02x %02x %02x %02x %02x %02x %02x\n", data[0],
103 data[1], data[2], data[3], data[4], data[5], data[6]);
105 usbhid_submit_report(hid, holtekff->field->report, USB_DIR_OUT);
108 static int holtekff_play(struct input_dev *dev, void *data,
109 struct ff_effect *effect)
111 struct hid_device *hid = input_get_drvdata(dev);
112 struct holtekff_device *holtekff = data;
114 /* effect type 1, length 65535 msec */
115 u8 buf[HOLTEKFF_MSG_LENGTH] =
116 { 0x01, 0x01, 0xff, 0xff, 0x10, 0xe0, 0x00 };
118 left = effect->u.rumble.strong_magnitude;
119 right = effect->u.rumble.weak_magnitude;
120 dbg_hid("called with 0x%04x 0x%04x\n", left, right);
122 if (!left && !right) {
123 holtekff_send(holtekff, hid, stop_all6);
132 /* The device takes a single magnitude, so we just sum them up. */
133 buf[6] = min(0xf, (left >> 12) + (right >> 12));
135 holtekff_send(holtekff, hid, buf);
136 holtekff_send(holtekff, hid, start_effect_1);
141 static int holtekff_init(struct hid_device *hid)
143 struct holtekff_device *holtekff;
144 struct hid_report *report;
145 struct hid_input *hidinput = list_entry(hid->inputs.next,
146 struct hid_input, list);
147 struct list_head *report_list =
148 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
149 struct input_dev *dev = hidinput->input;
152 if (list_empty(report_list)) {
153 hid_err(hid, "no output report found\n");
157 report = list_entry(report_list->next, struct hid_report, list);
159 if (report->maxfield < 1 || report->field[0]->report_count != 7) {
160 hid_err(hid, "unexpected output report layout\n");
164 holtekff = kzalloc(sizeof(*holtekff), GFP_KERNEL);
168 set_bit(FF_RUMBLE, dev->ffbit);
170 holtekff->field = report->field[0];
172 /* initialize the same way as win driver does */
173 holtekff_send(holtekff, hid, stop_all4);
174 holtekff_send(holtekff, hid, stop_all6);
176 error = input_ff_create_memless(dev, holtekff, holtekff_play);
182 hid_info(hid, "Force feedback for Holtek On Line Grip based devices by Anssi Hannula <anssi.hannula@iki.fi>\n");
187 static inline int holtekff_init(struct hid_device *hid)
193 static int holtek_probe(struct hid_device *hdev, const struct hid_device_id *id)
197 ret = hid_parse(hdev);
199 hid_err(hdev, "parse failed\n");
203 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
205 hid_err(hdev, "hw start failed\n");
216 static const struct hid_device_id holtek_devices[] = {
217 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) },
220 MODULE_DEVICE_TABLE(hid, holtek_devices);
222 static struct hid_driver holtek_driver = {
224 .id_table = holtek_devices,
225 .probe = holtek_probe,
228 static int __init holtek_init(void)
230 return hid_register_driver(&holtek_driver);
233 static void __exit holtek_exit(void)
235 hid_unregister_driver(&holtek_driver);
238 module_init(holtek_init);
239 module_exit(holtek_exit);