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d946e65e AH |
1 | /* |
2 | * Force feedback support for Holtek On Line Grip based gamepads | |
3 | * | |
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". | |
6 | * | |
7 | * Copyright (c) 2011 Anssi Hannula <anssi.hannula@iki.fi> | |
8 | */ | |
9 | ||
10 | /* | |
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. | |
15 | * | |
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. | |
20 | * | |
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 | |
24 | */ | |
25 | ||
26 | #include <linux/hid.h> | |
27 | #include <linux/input.h> | |
8f86a2c3 | 28 | #include <linux/module.h> |
d946e65e | 29 | #include <linux/slab.h> |
d946e65e AH |
30 | |
31 | #include "hid-ids.h" | |
32 | ||
33 | #ifdef CONFIG_HOLTEK_FF | |
d946e65e AH |
34 | |
35 | MODULE_LICENSE("GPL"); | |
36 | MODULE_AUTHOR("Anssi Hannula <anssi.hannula@iki.fi>"); | |
37 | MODULE_DESCRIPTION("Force feedback support for Holtek On Line Grip based devices"); | |
38 | ||
39 | /* | |
40 | * These commands and parameters are currently known: | |
41 | * | |
42 | * byte 0: command id: | |
43 | * 01 set effect parameters | |
44 | * 02 play specified effect | |
45 | * 03 stop specified effect | |
46 | * 04 stop all effects | |
47 | * 06 stop all effects | |
48 | * (the difference between 04 and 06 isn't known; win driver | |
49 | * sends 06,04 on application init, and 06 otherwise) | |
50 | * | |
51 | * Commands 01 and 02 need to be sent as pairs, i.e. you need to send 01 | |
52 | * before each 02. | |
53 | * | |
54 | * The rest of the bytes are parameters. Command 01 takes all of them, and | |
55 | * commands 02,03 take only the effect id. | |
56 | * | |
57 | * byte 1: | |
58 | * bits 0-3: effect id: | |
59 | * 1: very strong rumble | |
60 | * 2: periodic rumble, short intervals | |
61 | * 3: very strong rumble | |
62 | * 4: periodic rumble, long intervals | |
63 | * 5: weak periodic rumble, long intervals | |
64 | * 6: weak periodic rumble, short intervals | |
65 | * 7: periodic rumble, short intervals | |
66 | * 8: strong periodic rumble, short intervals | |
67 | * 9: very strong rumble | |
68 | * a: causes an error | |
69 | * b: very strong periodic rumble, very short intervals | |
70 | * c-f: nothing | |
71 | * bit 6: right (weak) motor enabled | |
72 | * bit 7: left (strong) motor enabled | |
73 | * | |
74 | * bytes 2-3: time in milliseconds, big-endian | |
75 | * bytes 5-6: unknown (win driver seems to use at least 10e0 with effect 1 | |
76 | * and 0014 with effect 6) | |
77 | * byte 7: | |
78 | * bits 0-3: effect magnitude | |
79 | */ | |
80 | ||
81 | #define HOLTEKFF_MSG_LENGTH 7 | |
82 | ||
83 | static const u8 start_effect_1[] = { 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
84 | static const u8 stop_all4[] = { 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
85 | static const u8 stop_all6[] = { 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
86 | ||
87 | struct holtekff_device { | |
88 | struct hid_field *field; | |
89 | }; | |
90 | ||
91 | static void holtekff_send(struct holtekff_device *holtekff, | |
92 | struct hid_device *hid, | |
93 | const u8 data[HOLTEKFF_MSG_LENGTH]) | |
94 | { | |
95 | int i; | |
96 | ||
97 | for (i = 0; i < HOLTEKFF_MSG_LENGTH; i++) { | |
98 | holtekff->field->value[i] = data[i]; | |
99 | } | |
100 | ||
9854a6f9 | 101 | dbg_hid("sending %7ph\n", data); |
d946e65e | 102 | |
d8814272 | 103 | hid_hw_request(hid, holtekff->field->report, HID_REQ_SET_REPORT); |
d946e65e AH |
104 | } |
105 | ||
106 | static int holtekff_play(struct input_dev *dev, void *data, | |
107 | struct ff_effect *effect) | |
108 | { | |
109 | struct hid_device *hid = input_get_drvdata(dev); | |
110 | struct holtekff_device *holtekff = data; | |
111 | int left, right; | |
112 | /* effect type 1, length 65535 msec */ | |
113 | u8 buf[HOLTEKFF_MSG_LENGTH] = | |
114 | { 0x01, 0x01, 0xff, 0xff, 0x10, 0xe0, 0x00 }; | |
115 | ||
116 | left = effect->u.rumble.strong_magnitude; | |
117 | right = effect->u.rumble.weak_magnitude; | |
118 | dbg_hid("called with 0x%04x 0x%04x\n", left, right); | |
119 | ||
120 | if (!left && !right) { | |
121 | holtekff_send(holtekff, hid, stop_all6); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | if (left) | |
126 | buf[1] |= 0x80; | |
127 | if (right) | |
128 | buf[1] |= 0x40; | |
129 | ||
130 | /* The device takes a single magnitude, so we just sum them up. */ | |
131 | buf[6] = min(0xf, (left >> 12) + (right >> 12)); | |
132 | ||
133 | holtekff_send(holtekff, hid, buf); | |
134 | holtekff_send(holtekff, hid, start_effect_1); | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | static int holtekff_init(struct hid_device *hid) | |
140 | { | |
141 | struct holtekff_device *holtekff; | |
142 | struct hid_report *report; | |
143 | struct hid_input *hidinput = list_entry(hid->inputs.next, | |
144 | struct hid_input, list); | |
145 | struct list_head *report_list = | |
146 | &hid->report_enum[HID_OUTPUT_REPORT].report_list; | |
147 | struct input_dev *dev = hidinput->input; | |
148 | int error; | |
149 | ||
150 | if (list_empty(report_list)) { | |
151 | hid_err(hid, "no output report found\n"); | |
152 | return -ENODEV; | |
153 | } | |
154 | ||
155 | report = list_entry(report_list->next, struct hid_report, list); | |
156 | ||
157 | if (report->maxfield < 1 || report->field[0]->report_count != 7) { | |
158 | hid_err(hid, "unexpected output report layout\n"); | |
159 | return -ENODEV; | |
160 | } | |
161 | ||
162 | holtekff = kzalloc(sizeof(*holtekff), GFP_KERNEL); | |
163 | if (!holtekff) | |
164 | return -ENOMEM; | |
165 | ||
166 | set_bit(FF_RUMBLE, dev->ffbit); | |
167 | ||
168 | holtekff->field = report->field[0]; | |
169 | ||
170 | /* initialize the same way as win driver does */ | |
171 | holtekff_send(holtekff, hid, stop_all4); | |
172 | holtekff_send(holtekff, hid, stop_all6); | |
173 | ||
174 | error = input_ff_create_memless(dev, holtekff, holtekff_play); | |
175 | if (error) { | |
176 | kfree(holtekff); | |
177 | return error; | |
178 | } | |
179 | ||
180 | hid_info(hid, "Force feedback for Holtek On Line Grip based devices by Anssi Hannula <anssi.hannula@iki.fi>\n"); | |
181 | ||
182 | return 0; | |
183 | } | |
184 | #else | |
185 | static inline int holtekff_init(struct hid_device *hid) | |
186 | { | |
187 | return 0; | |
188 | } | |
189 | #endif | |
190 | ||
191 | static int holtek_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
192 | { | |
193 | int ret; | |
194 | ||
195 | ret = hid_parse(hdev); | |
196 | if (ret) { | |
197 | hid_err(hdev, "parse failed\n"); | |
198 | goto err; | |
199 | } | |
200 | ||
201 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); | |
202 | if (ret) { | |
203 | hid_err(hdev, "hw start failed\n"); | |
204 | goto err; | |
205 | } | |
206 | ||
207 | holtekff_init(hdev); | |
208 | ||
209 | return 0; | |
210 | err: | |
211 | return ret; | |
212 | } | |
213 | ||
214 | static const struct hid_device_id holtek_devices[] = { | |
215 | { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) }, | |
216 | { } | |
217 | }; | |
218 | MODULE_DEVICE_TABLE(hid, holtek_devices); | |
219 | ||
220 | static struct hid_driver holtek_driver = { | |
221 | .name = "holtek", | |
222 | .id_table = holtek_devices, | |
223 | .probe = holtek_probe, | |
224 | }; | |
f425458e | 225 | module_hid_driver(holtek_driver); |