drivers/hid/hid-tmff.c

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This source file includes following definitions.
tmff_scale_u16
tmff_scale_s8
tmff_play
tmff_init
tmff_init
tm_probe
   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 */
  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 */
  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 
  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         int motor_swap;
  82 
  83         switch (effect->type) {
  84         case FF_CONSTANT:
  85                 x = tmff_scale_s8(effect->u.ramp.start_level,
  86                                         ff_field->logical_minimum,
  87                                         ff_field->logical_maximum);
  88                 y = tmff_scale_s8(effect->u.ramp.end_level,
  89                                         ff_field->logical_minimum,
  90                                         ff_field->logical_maximum);
  91 
  92                 dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
  93                 ff_field->value[0] = x;
  94                 ff_field->value[1] = y;
  95                 hid_hw_request(hid, tmff->report, HID_REQ_SET_REPORT);
  96                 break;
  97 
  98         case FF_RUMBLE:
  99                 left = tmff_scale_u16(effect->u.rumble.weak_magnitude,
 100                                         ff_field->logical_minimum,
 101                                         ff_field->logical_maximum);
 102                 right = tmff_scale_u16(effect->u.rumble.strong_magnitude,
 103                                         ff_field->logical_minimum,
 104                                         ff_field->logical_maximum);
 105 
 106                 /* 2-in-1 strong motor is left */
 107                 if (hid->product == THRUSTMASTER_DEVICE_ID_2_IN_1_DT) {
 108                         motor_swap = left;
 109                         left = right;
 110                         right = motor_swap;
 111                 }
 112 
 113                 dbg_hid("(left,right)=(%08x, %08x)\n", left, right);
 114                 ff_field->value[0] = left;
 115                 ff_field->value[1] = right;
 116                 hid_hw_request(hid, tmff->report, HID_REQ_SET_REPORT);
 117                 break;
 118         }
 119         return 0;
 120 }
 121 
 122 static int tmff_init(struct hid_device *hid, const signed short *ff_bits)
 123 {
 124         struct tmff_device *tmff;
 125         struct hid_report *report;
 126         struct list_head *report_list;
 127         struct hid_input *hidinput;
 128         struct input_dev *input_dev;
 129         int error;
 130         int i;
 131 
 132         if (list_empty(&hid->inputs)) {
 133                 hid_err(hid, "no inputs found\n");
 134                 return -ENODEV;
 135         }
 136         hidinput = list_entry(hid->inputs.next, struct hid_input, list);
 137         input_dev = hidinput->input;
 138 
 139         tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
 140         if (!tmff)
 141                 return -ENOMEM;
 142 
 143         /* Find the report to use */
 144         report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
 145         list_for_each_entry(report, report_list, list) {
 146                 int fieldnum;
 147 
 148                 for (fieldnum = 0; fieldnum < report->maxfield; ++fieldnum) {
 149                         struct hid_field *field = report->field[fieldnum];
 150 
 151                         if (field->maxusage <= 0)
 152                                 continue;
 153 
 154                         switch (field->usage[0].hid) {
 155                         case THRUSTMASTER_USAGE_FF:
 156                                 if (field->report_count < 2) {
 157                                         hid_warn(hid, "ignoring FF field with report_count < 2\n");
 158                                         continue;
 159                                 }
 160 
 161                                 if (field->logical_maximum ==
 162                                                 field->logical_minimum) {
 163                                         hid_warn(hid, "ignoring FF field with logical_maximum == logical_minimum\n");
 164                                         continue;
 165                                 }
 166 
 167                                 if (tmff->report && tmff->report != report) {
 168                                         hid_warn(hid, "ignoring FF field in other report\n");
 169                                         continue;
 170                                 }
 171 
 172                                 if (tmff->ff_field && tmff->ff_field != field) {
 173                                         hid_warn(hid, "ignoring duplicate FF field\n");
 174                                         continue;
 175                                 }
 176 
 177                                 tmff->report = report;
 178                                 tmff->ff_field = field;
 179 
 180                                 for (i = 0; ff_bits[i] >= 0; i++)
 181                                         set_bit(ff_bits[i], input_dev->ffbit);
 182 
 183                                 break;
 184 
 185                         default:
 186                                 hid_warn(hid, "ignoring unknown output usage %08x\n",
 187                                          field->usage[0].hid);
 188                                 continue;
 189                         }
 190                 }
 191         }
 192 
 193         if (!tmff->report) {
 194                 hid_err(hid, "can't find FF field in output reports\n");
 195                 error = -ENODEV;
 196                 goto fail;
 197         }
 198 
 199         error = input_ff_create_memless(input_dev, tmff, tmff_play);
 200         if (error)
 201                 goto fail;
 202 
 203         hid_info(hid, "force feedback for ThrustMaster devices by Zinx Verituse <zinx@epicsol.org>\n");
 204         return 0;
 205 
 206 fail:
 207         kfree(tmff);
 208         return error;
 209 }
 210 #else
 211 static inline int tmff_init(struct hid_device *hid, const signed short *ff_bits)
 212 {
 213         return 0;
 214 }
 215 #endif
 216 
 217 static int tm_probe(struct hid_device *hdev, const struct hid_device_id *id)
 218 {
 219         int ret;
 220 
 221         ret = hid_parse(hdev);
 222         if (ret) {
 223                 hid_err(hdev, "parse failed\n");
 224                 goto err;
 225         }
 226 
 227         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 228         if (ret) {
 229                 hid_err(hdev, "hw start failed\n");
 230                 goto err;
 231         }
 232 
 233         tmff_init(hdev, (void *)id->driver_data);
 234 
 235         return 0;
 236 err:
 237         return ret;
 238 }
 239 
 240 static const struct hid_device_id tm_devices[] = {
 241         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300),
 242                 .driver_data = (unsigned long)ff_rumble },
 243         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304),   /* FireStorm Dual Power 2 (and 3) */
 244                 .driver_data = (unsigned long)ff_rumble },
 245         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, THRUSTMASTER_DEVICE_ID_2_IN_1_DT),   /* Dual Trigger 2-in-1 */
 246                 .driver_data = (unsigned long)ff_rumble },
 247         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323),   /* Dual Trigger 3-in-1 (PC Mode) */
 248                 .driver_data = (unsigned long)ff_rumble },
 249         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324),   /* Dual Trigger 3-in-1 (PS3 Mode) */
 250                 .driver_data = (unsigned long)ff_rumble },
 251         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb605),   /* NASCAR PRO FF2 Wheel */
 252                 .driver_data = (unsigned long)ff_joystick },
 253         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651),   /* FGT Rumble Force Wheel */
 254                 .driver_data = (unsigned long)ff_rumble },
 255         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653),   /* RGT Force Feedback CLUTCH Raging Wheel */
 256                 .driver_data = (unsigned long)ff_joystick },
 257         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654),   /* FGT Force Feedback Wheel */
 258                 .driver_data = (unsigned long)ff_joystick },
 259         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a),   /* F430 Force Feedback Wheel */
 260                 .driver_data = (unsigned long)ff_joystick },
 261         { }
 262 };
 263 MODULE_DEVICE_TABLE(hid, tm_devices);
 264 
 265 static struct hid_driver tm_driver = {
 266         .name = "thrustmaster",
 267         .id_table = tm_devices,
 268         .probe = tm_probe,
 269 };
 270 module_hid_driver(tm_driver);
 271 
 272 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/hid/hid-tmff.c

DEFINITIONS
