1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Force feedback support for Zeroplus based devices
5 * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
12 #include <linux/hid.h>
13 #include <linux/input.h>
14 #include <linux/slab.h>
15 #include <linux/module.h>
19 #ifdef CONFIG_ZEROPLUS_FF
22 struct hid_report *report;
25 static int zpff_play(struct input_dev *dev, void *data,
26 struct ff_effect *effect)
28 struct hid_device *hid = input_get_drvdata(dev);
29 struct zpff_device *zpff = data;
33 * The following is specified the other way around in the Zeroplus
34 * datasheet but the order below is correct for the XFX Executioner;
35 * however it is possible that the XFX Executioner is an exception
38 left = effect->u.rumble.strong_magnitude;
39 right = effect->u.rumble.weak_magnitude;
40 dbg_hid("called with 0x%04x 0x%04x\n", left, right);
42 left = left * 0x7f / 0xffff;
43 right = right * 0x7f / 0xffff;
45 zpff->report->field[2]->value[0] = left;
46 zpff->report->field[3]->value[0] = right;
47 dbg_hid("running with 0x%02x 0x%02x\n", left, right);
48 hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
53 static int zpff_init(struct hid_device *hid)
55 struct zpff_device *zpff;
56 struct hid_report *report;
57 struct hid_input *hidinput = list_entry(hid->inputs.next,
58 struct hid_input, list);
59 struct input_dev *dev = hidinput->input;
62 for (i = 0; i < 4; i++) {
63 report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
68 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
72 set_bit(FF_RUMBLE, dev->ffbit);
74 error = input_ff_create_memless(dev, zpff, zpff_play);
80 zpff->report = report;
81 zpff->report->field[0]->value[0] = 0x00;
82 zpff->report->field[1]->value[0] = 0x02;
83 zpff->report->field[2]->value[0] = 0x00;
84 zpff->report->field[3]->value[0] = 0x00;
85 hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
87 hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
92 static inline int zpff_init(struct hid_device *hid)
98 static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id)
102 ret = hid_parse(hdev);
104 hid_err(hdev, "parse failed\n");
108 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
110 hid_err(hdev, "hw start failed\n");
121 static const struct hid_device_id zp_devices[] = {
122 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
123 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
126 MODULE_DEVICE_TABLE(hid, zp_devices);
128 static struct hid_driver zp_driver = {
130 .id_table = zp_devices,
133 module_hid_driver(zp_driver);
135 MODULE_LICENSE("GPL");