linux/drivers/hid/hid-tmff.c
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   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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