xref: /openbmc/linux/drivers/hid/hid-tmff.c (revision 415e701c)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Force feedback support for various HID compliant devices by ThrustMaster:
4  *    ThrustMaster FireStorm Dual Power 2
5  * and possibly others whose device ids haven't been added.
6  *
7  *  Modified to support ThrustMaster devices by Zinx Verituse
8  *  on 2003-01-25 from the Logitech force feedback driver,
9  *  which is by Johann Deneux.
10  *
11  *  Copyright (c) 2003 Zinx Verituse <zinx@epicsol.org>
12  *  Copyright (c) 2002 Johann Deneux
13  */
14 
15 /*
16  */
17 
18 #include <linux/hid.h>
19 #include <linux/input.h>
20 #include <linux/slab.h>
21 #include <linux/module.h>
22 
23 #include "hid-ids.h"
24 
25 #define THRUSTMASTER_DEVICE_ID_2_IN_1_DT	0xb320
26 
27 static const signed short ff_rumble[] = {
28 	FF_RUMBLE,
29 	-1
30 };
31 
32 static const signed short ff_joystick[] = {
33 	FF_CONSTANT,
34 	-1
35 };
36 
37 #ifdef CONFIG_THRUSTMASTER_FF
38 
39 /* Usages for thrustmaster devices I know about */
40 #define THRUSTMASTER_USAGE_FF	(HID_UP_GENDESK | 0xbb)
41 
42 struct tmff_device {
43 	struct hid_report *report;
44 	struct hid_field *ff_field;
45 };
46 
47 /* Changes values from 0 to 0xffff into values from minimum to maximum */
tmff_scale_u16(unsigned int in,int minimum,int maximum)48 static inline int tmff_scale_u16(unsigned int in, int minimum, int maximum)
49 {
50 	int ret;
51 
52 	ret = (in * (maximum - minimum) / 0xffff) + minimum;
53 	if (ret < minimum)
54 		return minimum;
55 	if (ret > maximum)
56 		return maximum;
57 	return ret;
58 }
59 
60 /* Changes values from -0x80 to 0x7f into values from minimum to maximum */
tmff_scale_s8(int in,int minimum,int maximum)61 static inline int tmff_scale_s8(int in, int minimum, int maximum)
62 {
63 	int ret;
64 
65 	ret = (((in + 0x80) * (maximum - minimum)) / 0xff) + minimum;
66 	if (ret < minimum)
67 		return minimum;
68 	if (ret > maximum)
69 		return maximum;
70 	return ret;
71 }
72 
tmff_play(struct input_dev * dev,void * data,struct ff_effect * effect)73 static int tmff_play(struct input_dev *dev, void *data,
74 		struct ff_effect *effect)
75 {
76 	struct hid_device *hid = input_get_drvdata(dev);
77 	struct tmff_device *tmff = data;
78 	struct hid_field *ff_field = tmff->ff_field;
79 	int x, y;
80 	int left, right;	/* Rumbling */
81 
82 	switch (effect->type) {
83 	case FF_CONSTANT:
84 		x = tmff_scale_s8(effect->u.ramp.start_level,
85 					ff_field->logical_minimum,
86 					ff_field->logical_maximum);
87 		y = tmff_scale_s8(effect->u.ramp.end_level,
88 					ff_field->logical_minimum,
89 					ff_field->logical_maximum);
90 
91 		dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
92 		ff_field->value[0] = x;
93 		ff_field->value[1] = y;
94 		hid_hw_request(hid, tmff->report, HID_REQ_SET_REPORT);
95 		break;
96 
97 	case FF_RUMBLE:
98 		left = tmff_scale_u16(effect->u.rumble.weak_magnitude,
99 					ff_field->logical_minimum,
100 					ff_field->logical_maximum);
101 		right = tmff_scale_u16(effect->u.rumble.strong_magnitude,
102 					ff_field->logical_minimum,
103 					ff_field->logical_maximum);
104 
105 		/* 2-in-1 strong motor is left */
106 		if (hid->product == THRUSTMASTER_DEVICE_ID_2_IN_1_DT)
107 			swap(left, right);
108 
109 		dbg_hid("(left,right)=(%08x, %08x)\n", left, right);
110 		ff_field->value[0] = left;
111 		ff_field->value[1] = right;
112 		hid_hw_request(hid, tmff->report, HID_REQ_SET_REPORT);
113 		break;
114 	}
115 	return 0;
116 }
117 
tmff_init(struct hid_device * hid,const signed short * ff_bits)118 static int tmff_init(struct hid_device *hid, const signed short *ff_bits)
119 {
120 	struct tmff_device *tmff;
121 	struct hid_report *report;
122 	struct list_head *report_list;
123 	struct hid_input *hidinput;
124 	struct input_dev *input_dev;
125 	int error;
126 	int i;
127 
128 	if (list_empty(&hid->inputs)) {
129 		hid_err(hid, "no inputs found\n");
130 		return -ENODEV;
131 	}
132 	hidinput = list_entry(hid->inputs.next, struct hid_input, list);
133 	input_dev = hidinput->input;
134 
135 	tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
136 	if (!tmff)
137 		return -ENOMEM;
138 
139 	/* Find the report to use */
140 	report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
141 	list_for_each_entry(report, report_list, list) {
142 		int fieldnum;
143 
144 		for (fieldnum = 0; fieldnum < report->maxfield; ++fieldnum) {
145 			struct hid_field *field = report->field[fieldnum];
146 
147 			if (field->maxusage <= 0)
148 				continue;
149 
150 			switch (field->usage[0].hid) {
151 			case THRUSTMASTER_USAGE_FF:
152 				if (field->report_count < 2) {
153 					hid_warn(hid, "ignoring FF field with report_count < 2\n");
154 					continue;
155 				}
156 
157 				if (field->logical_maximum ==
158 						field->logical_minimum) {
159 					hid_warn(hid, "ignoring FF field with logical_maximum == logical_minimum\n");
160 					continue;
161 				}
162 
163 				if (tmff->report && tmff->report != report) {
164 					hid_warn(hid, "ignoring FF field in other report\n");
165 					continue;
166 				}
167 
168 				if (tmff->ff_field && tmff->ff_field != field) {
169 					hid_warn(hid, "ignoring duplicate FF field\n");
170 					continue;
171 				}
172 
173 				tmff->report = report;
174 				tmff->ff_field = field;
175 
176 				for (i = 0; ff_bits[i] >= 0; i++)
177 					set_bit(ff_bits[i], input_dev->ffbit);
178 
179 				break;
180 
181 			default:
182 				hid_warn(hid, "ignoring unknown output usage %08x\n",
183 					 field->usage[0].hid);
184 				continue;
185 			}
186 		}
187 	}
188 
189 	if (!tmff->report) {
190 		hid_err(hid, "can't find FF field in output reports\n");
191 		error = -ENODEV;
192 		goto fail;
193 	}
194 
195 	error = input_ff_create_memless(input_dev, tmff, tmff_play);
196 	if (error)
197 		goto fail;
198 
199 	hid_info(hid, "force feedback for ThrustMaster devices by Zinx Verituse <zinx@epicsol.org>\n");
200 	return 0;
201 
202 fail:
203 	kfree(tmff);
204 	return error;
205 }
206 #else
tmff_init(struct hid_device * hid,const signed short * ff_bits)207 static inline int tmff_init(struct hid_device *hid, const signed short *ff_bits)
208 {
209 	return 0;
210 }
211 #endif
212 
tm_probe(struct hid_device * hdev,const struct hid_device_id * id)213 static int tm_probe(struct hid_device *hdev, const struct hid_device_id *id)
214 {
215 	int ret;
216 
217 	ret = hid_parse(hdev);
218 	if (ret) {
219 		hid_err(hdev, "parse failed\n");
220 		goto err;
221 	}
222 
223 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
224 	if (ret) {
225 		hid_err(hdev, "hw start failed\n");
226 		goto err;
227 	}
228 
229 	tmff_init(hdev, (void *)id->driver_data);
230 
231 	return 0;
232 err:
233 	return ret;
234 }
235 
236 static const struct hid_device_id tm_devices[] = {
237 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300),
238 		.driver_data = (unsigned long)ff_rumble },
239 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304),   /* FireStorm Dual Power 2 (and 3) */
240 		.driver_data = (unsigned long)ff_rumble },
241 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, THRUSTMASTER_DEVICE_ID_2_IN_1_DT),   /* Dual Trigger 2-in-1 */
242 		.driver_data = (unsigned long)ff_rumble },
243 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323),   /* Dual Trigger 3-in-1 (PC Mode) */
244 		.driver_data = (unsigned long)ff_rumble },
245 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324),   /* Dual Trigger 3-in-1 (PS3 Mode) */
246 		.driver_data = (unsigned long)ff_rumble },
247 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb605),   /* NASCAR PRO FF2 Wheel */
248 		.driver_data = (unsigned long)ff_joystick },
249 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651),	/* FGT Rumble Force Wheel */
250 		.driver_data = (unsigned long)ff_rumble },
251 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653),	/* RGT Force Feedback CLUTCH Raging Wheel */
252 		.driver_data = (unsigned long)ff_joystick },
253 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654),	/* FGT Force Feedback Wheel */
254 		.driver_data = (unsigned long)ff_joystick },
255 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a),	/* F430 Force Feedback Wheel */
256 		.driver_data = (unsigned long)ff_joystick },
257 	{ }
258 };
259 MODULE_DEVICE_TABLE(hid, tm_devices);
260 
261 static struct hid_driver tm_driver = {
262 	.name = "thrustmaster",
263 	.id_table = tm_devices,
264 	.probe = tm_probe,
265 };
266 module_hid_driver(tm_driver);
267 
268 MODULE_LICENSE("GPL");
269