1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Force feedback support for Zeroplus based devices |
4 | * |
5 | * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com> |
6 | */ |
7 | |
8 | /* |
9 | */ |
10 | |
11 | |
12 | #include <linux/hid.h> |
13 | #include <linux/input.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/module.h> |
16 | |
17 | #include "hid-ids.h" |
18 | |
19 | #ifdef CONFIG_ZEROPLUS_FF |
20 | |
21 | struct zpff_device { |
22 | struct hid_report *report; |
23 | }; |
24 | |
25 | static int zpff_play(struct input_dev *dev, void *data, |
26 | struct ff_effect *effect) |
27 | { |
28 | struct hid_device *hid = input_get_drvdata(dev); |
29 | struct zpff_device *zpff = data; |
30 | int left, right; |
31 | |
32 | /* |
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 |
36 | */ |
37 | |
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); |
41 | |
42 | left = left * 0x7f / 0xffff; |
43 | right = right * 0x7f / 0xffff; |
44 | |
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(hdev: hid, report: zpff->report, reqtype: HID_REQ_SET_REPORT); |
49 | |
50 | return 0; |
51 | } |
52 | |
53 | static int zpff_init(struct hid_device *hid) |
54 | { |
55 | struct zpff_device *zpff; |
56 | struct hid_report *report; |
57 | struct hid_input *hidinput; |
58 | struct input_dev *dev; |
59 | int i, error; |
60 | |
61 | if (list_empty(head: &hid->inputs)) { |
62 | hid_err(hid, "no inputs found\n" ); |
63 | return -ENODEV; |
64 | } |
65 | hidinput = list_entry(hid->inputs.next, struct hid_input, list); |
66 | dev = hidinput->input; |
67 | |
68 | for (i = 0; i < 4; i++) { |
69 | report = hid_validate_values(hid, type: HID_OUTPUT_REPORT, id: 0, field_index: i, report_counts: 1); |
70 | if (!report) |
71 | return -ENODEV; |
72 | } |
73 | |
74 | zpff = kzalloc(size: sizeof(struct zpff_device), GFP_KERNEL); |
75 | if (!zpff) |
76 | return -ENOMEM; |
77 | |
78 | set_bit(FF_RUMBLE, addr: dev->ffbit); |
79 | |
80 | error = input_ff_create_memless(dev, data: zpff, play_effect: zpff_play); |
81 | if (error) { |
82 | kfree(objp: zpff); |
83 | return error; |
84 | } |
85 | |
86 | zpff->report = report; |
87 | zpff->report->field[0]->value[0] = 0x00; |
88 | zpff->report->field[1]->value[0] = 0x02; |
89 | zpff->report->field[2]->value[0] = 0x00; |
90 | zpff->report->field[3]->value[0] = 0x00; |
91 | hid_hw_request(hdev: hid, report: zpff->report, reqtype: HID_REQ_SET_REPORT); |
92 | |
93 | hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n" ); |
94 | |
95 | return 0; |
96 | } |
97 | #else |
98 | static inline int zpff_init(struct hid_device *hid) |
99 | { |
100 | return 0; |
101 | } |
102 | #endif |
103 | |
104 | static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id) |
105 | { |
106 | int ret; |
107 | |
108 | ret = hid_parse(hdev); |
109 | if (ret) { |
110 | hid_err(hdev, "parse failed\n" ); |
111 | goto err; |
112 | } |
113 | |
114 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); |
115 | if (ret) { |
116 | hid_err(hdev, "hw start failed\n" ); |
117 | goto err; |
118 | } |
119 | |
120 | zpff_init(hid: hdev); |
121 | |
122 | return 0; |
123 | err: |
124 | return ret; |
125 | } |
126 | |
127 | static const struct hid_device_id zp_devices[] = { |
128 | { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) }, |
129 | { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) }, |
130 | { } |
131 | }; |
132 | MODULE_DEVICE_TABLE(hid, zp_devices); |
133 | |
134 | static struct hid_driver zp_driver = { |
135 | .name = "zeroplus" , |
136 | .id_table = zp_devices, |
137 | .probe = zp_probe, |
138 | }; |
139 | module_hid_driver(zp_driver); |
140 | |
141 | MODULE_LICENSE("GPL" ); |
142 | |