Root/drivers/hid/hid-tmff.c

1/*
2 * Force feedback support for various HID compliant devices by ThrustMaster:
3 * ThrustMaster FireStorm Dual Power 2
4 * and possibly others whose device ids haven't been added.
5 *
6 * Modified to support ThrustMaster devices by Zinx Verituse
7 * on 2003-01-25 from the Logitech force feedback driver,
8 * which is by Johann Deneux.
9 *
10 * Copyright (c) 2003 Zinx Verituse <zinx@epicsol.org>
11 * Copyright (c) 2002 Johann Deneux
12 */
13
14/*
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 */
29
30#include <linux/hid.h>
31#include <linux/input.h>
32#include <linux/slab.h>
33#include <linux/usb.h>
34#include <linux/module.h>
35
36#include "hid-ids.h"
37
38static const signed short ff_rumble[] = {
39    FF_RUMBLE,
40    -1
41};
42
43static const signed short ff_joystick[] = {
44    FF_CONSTANT,
45    -1
46};
47
48#ifdef CONFIG_THRUSTMASTER_FF
49#include "usbhid/usbhid.h"
50
51/* Usages for thrustmaster devices I know about */
52#define THRUSTMASTER_USAGE_FF (HID_UP_GENDESK | 0xbb)
53
54struct tmff_device {
55    struct hid_report *report;
56    struct hid_field *ff_field;
57};
58
59/* Changes values from 0 to 0xffff into values from minimum to maximum */
60static inline int tmff_scale_u16(unsigned int in, int minimum, int maximum)
61{
62    int ret;
63
64    ret = (in * (maximum - minimum) / 0xffff) + minimum;
65    if (ret < minimum)
66        return minimum;
67    if (ret > maximum)
68        return maximum;
69    return ret;
70}
71
72/* Changes values from -0x80 to 0x7f into values from minimum to maximum */
73static inline int tmff_scale_s8(int in, int minimum, int maximum)
74{
75    int ret;
76
77    ret = (((in + 0x80) * (maximum - minimum)) / 0xff) + minimum;
78    if (ret < minimum)
79        return minimum;
80    if (ret > maximum)
81        return maximum;
82    return ret;
83}
84
85static int tmff_play(struct input_dev *dev, void *data,
86        struct ff_effect *effect)
87{
88    struct hid_device *hid = input_get_drvdata(dev);
89    struct tmff_device *tmff = data;
90    struct hid_field *ff_field = tmff->ff_field;
91    int x, y;
92    int left, right; /* Rumbling */
93
94    switch (effect->type) {
95    case FF_CONSTANT:
96        x = tmff_scale_s8(effect->u.ramp.start_level,
97                    ff_field->logical_minimum,
98                    ff_field->logical_maximum);
99        y = tmff_scale_s8(effect->u.ramp.end_level,
100                    ff_field->logical_minimum,
101                    ff_field->logical_maximum);
102
103        dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
104        ff_field->value[0] = x;
105        ff_field->value[1] = y;
106        usbhid_submit_report(hid, tmff->report, USB_DIR_OUT);
107        break;
108
109    case FF_RUMBLE:
110        left = tmff_scale_u16(effect->u.rumble.weak_magnitude,
111                    ff_field->logical_minimum,
112                    ff_field->logical_maximum);
113        right = tmff_scale_u16(effect->u.rumble.strong_magnitude,
114                    ff_field->logical_minimum,
115                    ff_field->logical_maximum);
116
117        dbg_hid("(left,right)=(%08x, %08x)\n", left, right);
118        ff_field->value[0] = left;
119        ff_field->value[1] = right;
120        usbhid_submit_report(hid, tmff->report, USB_DIR_OUT);
121        break;
122    }
123    return 0;
124}
125
126static int tmff_init(struct hid_device *hid, const signed short *ff_bits)
127{
128    struct tmff_device *tmff;
129    struct hid_report *report;
130    struct list_head *report_list;
131    struct hid_input *hidinput = list_entry(hid->inputs.next,
132                            struct hid_input, list);
133    struct input_dev *input_dev = hidinput->input;
134    int error;
135    int i;
136
137    tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
138    if (!tmff)
139        return -ENOMEM;
140
141    /* Find the report to use */
142    report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
143    list_for_each_entry(report, report_list, list) {
144        int fieldnum;
145
146        for (fieldnum = 0; fieldnum < report->maxfield; ++fieldnum) {
147            struct hid_field *field = report->field[fieldnum];
148
149            if (field->maxusage <= 0)
150                continue;
151
152            switch (field->usage[0].hid) {
153            case THRUSTMASTER_USAGE_FF:
154                if (field->report_count < 2) {
155                    hid_warn(hid, "ignoring FF field with report_count < 2\n");
156                    continue;
157                }
158
159                if (field->logical_maximum ==
160                        field->logical_minimum) {
161                    hid_warn(hid, "ignoring FF field with logical_maximum == logical_minimum\n");
162                    continue;
163                }
164
165                if (tmff->report && tmff->report != report) {
166                    hid_warn(hid, "ignoring FF field in other report\n");
167                    continue;
168                }
169
170                if (tmff->ff_field && tmff->ff_field != field) {
171                    hid_warn(hid, "ignoring duplicate FF field\n");
172                    continue;
173                }
174
175                tmff->report = report;
176                tmff->ff_field = field;
177
178                for (i = 0; ff_bits[i] >= 0; i++)
179                    set_bit(ff_bits[i], input_dev->ffbit);
180
181                break;
182
183            default:
184                hid_warn(hid, "ignoring unknown output usage %08x\n",
185                     field->usage[0].hid);
186                continue;
187            }
188        }
189    }
190
191    if (!tmff->report) {
192        hid_err(hid, "can't find FF field in output reports\n");
193        error = -ENODEV;
194        goto fail;
195    }
196
197    error = input_ff_create_memless(input_dev, tmff, tmff_play);
198    if (error)
199        goto fail;
200
201    hid_info(hid, "force feedback for ThrustMaster devices by Zinx Verituse <zinx@epicsol.org>\n");
202    return 0;
203
204fail:
205    kfree(tmff);
206    return error;
207}
208#else
209static inline int tmff_init(struct hid_device *hid, const signed short *ff_bits)
210{
211    return 0;
212}
213#endif
214
215static int tm_probe(struct hid_device *hdev, const struct hid_device_id *id)
216{
217    int ret;
218
219    ret = hid_parse(hdev);
220    if (ret) {
221        hid_err(hdev, "parse failed\n");
222        goto err;
223    }
224
225    ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
226    if (ret) {
227        hid_err(hdev, "hw start failed\n");
228        goto err;
229    }
230
231    tmff_init(hdev, (void *)id->driver_data);
232
233    return 0;
234err:
235    return ret;
236}
237
238static const struct hid_device_id tm_devices[] = {
239    { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300),
240        .driver_data = (unsigned long)ff_rumble },
241    { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304), /* FireStorm Dual Power 2 (and 3) */
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, 0xb651), /* FGT Rumble Force Wheel */
248        .driver_data = (unsigned long)ff_rumble },
249    { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653), /* RGT Force Feedback CLUTCH Raging Wheel */
250        .driver_data = (unsigned long)ff_joystick },
251    { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654), /* FGT Force Feedback Wheel */
252        .driver_data = (unsigned long)ff_joystick },
253    { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a), /* F430 Force Feedback Wheel */
254        .driver_data = (unsigned long)ff_joystick },
255    { }
256};
257MODULE_DEVICE_TABLE(hid, tm_devices);
258
259static struct hid_driver tm_driver = {
260    .name = "thrustmaster",
261    .id_table = tm_devices,
262    .probe = tm_probe,
263};
264
265static int __init tm_init(void)
266{
267    return hid_register_driver(&tm_driver);
268}
269
270static void __exit tm_exit(void)
271{
272    hid_unregister_driver(&tm_driver);
273}
274
275module_init(tm_init);
276module_exit(tm_exit);
277MODULE_LICENSE("GPL");
278

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