drivers/hid/hid-dr.c

   1 /*
   2  * Force feedback support for DragonRise Inc. game controllers
   3  *
   4  * From what I have gathered, these devices are mass produced in China and are
   5  * distributed under several vendors. They often share the same design as
   6  * the original PlayStation DualShock controller.
   7  *
   8  * 0079:0006 "DragonRise Inc.   Generic   USB  Joystick  "
   9  *  - tested with a Tesun USB-703 game controller.
  10  *
  11  * Copyright (c) 2009 Richard Walmsley <richwalm@gmail.com>
  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/input.h>
  31 #include <linux/slab.h>
  32 #include <linux/hid.h>
  33 #include <linux/module.h>
  34
  35 #include "hid-ids.h"
  36
  37 #ifdef CONFIG_DRAGONRISE_FF
  38
  39 struct drff_device {
  40         struct hid_report *report;
  41 };
  42
  43 static int drff_play(struct input_dev *dev, void *data,
  44                                  struct ff_effect *effect)
  45 {
  46         struct hid_device *hid = input_get_drvdata(dev);
  47         struct drff_device *drff = data;
  48         int strong, weak;
  49
  50         strong = effect->u.rumble.strong_magnitude;
  51         weak = effect->u.rumble.weak_magnitude;
  52
  53         dbg_hid("called with 0x%04x 0x%04x", strong, weak);
  54
  55         if (strong || weak) {
  56                 strong = strong * 0xff / 0xffff;
  57                 weak = weak * 0xff / 0xffff;
  58
  59                 /* While reverse engineering this device, I found that when
  60                    this value is set, it causes the strong rumble to function
  61                    at a near maximum speed, so we'll bypass it. */
  62                 if (weak == 0x0a)
  63                         weak = 0x0b;
  64
  65                 drff->report->field[0]->value[0] = 0x51;
  66                 drff->report->field[0]->value[1] = 0x00;
  67                 drff->report->field[0]->value[2] = weak;
  68                 drff->report->field[0]->value[4] = strong;
  69                 hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT);
  70
  71                 drff->report->field[0]->value[0] = 0xfa;
  72                 drff->report->field[0]->value[1] = 0xfe;
  73         } else {
  74                 drff->report->field[0]->value[0] = 0xf3;
  75                 drff->report->field[0]->value[1] = 0x00;
  76         }
  77
  78         drff->report->field[0]->value[2] = 0x00;
  79         drff->report->field[0]->value[4] = 0x00;
  80         dbg_hid("running with 0x%02x 0x%02x", strong, weak);
  81         hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT);
  82
  83         return 0;
  84 }
  85
  86 static int drff_init(struct hid_device *hid)
  87 {
  88         struct drff_device *drff;
  89         struct hid_report *report;
  90         struct hid_input *hidinput = list_first_entry(&hid->inputs,
  91                                                 struct hid_input, list);
  92         struct list_head *report_list =
  93                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  94         struct input_dev *dev = hidinput->input;
  95         int error;
  96
  97         if (list_empty(report_list)) {
  98                 hid_err(hid, "no output reports found\n");
  99                 return -ENODEV;
 100         }
 101
 102         report = list_first_entry(report_list, struct hid_report, list);
 103         if (report->maxfield < 1) {
 104                 hid_err(hid, "no fields in the report\n");
 105                 return -ENODEV;
 106         }
 107
 108         if (report->field[0]->report_count < 7) {
 109                 hid_err(hid, "not enough values in the field\n");
 110                 return -ENODEV;
 111         }
 112
 113         drff = kzalloc(sizeof(struct drff_device), GFP_KERNEL);
 114         if (!drff)
 115                 return -ENOMEM;
 116
 117         set_bit(FF_RUMBLE, dev->ffbit);
 118
 119         error = input_ff_create_memless(dev, drff, drff_play);
 120         if (error) {
 121                 kfree(drff);
 122                 return error;
 123         }
 124
 125         drff->report = report;
 126         drff->report->field[0]->value[0] = 0xf3;
 127         drff->report->field[0]->value[1] = 0x00;
 128         drff->report->field[0]->value[2] = 0x00;
 129         drff->report->field[0]->value[3] = 0x00;
 130         drff->report->field[0]->value[4] = 0x00;
 131         drff->report->field[0]->value[5] = 0x00;
 132         drff->report->field[0]->value[6] = 0x00;
 133         hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT);
 134
 135         hid_info(hid, "Force Feedback for DragonRise Inc. "
 136                  "game controllers by Richard Walmsley <richwalm@gmail.com>\n");
 137
 138         return 0;
 139 }
 140 #else
 141 static inline int drff_init(struct hid_device *hid)
 142 {
 143         return 0;
 144 }
 145 #endif
 146
 147 /*
 148  * The original descriptor of joystick with PID 0x0011, represented by DVTech PC
 149  * JS19. It seems both copied from another device and a result of confusion
 150  * either about the specification or about the program used to create the
 151  * descriptor. In any case, it's a wonder it works on Windows.
 152  *
 153  *  Usage Page (Desktop),             ; Generic desktop controls (01h)
 154  *  Usage (Joystick),                 ; Joystick (04h, application collection)
 155  *  Collection (Application),
 156  *    Collection (Logical),
 157  *      Report Size (8),
 158  *      Report Count (5),
 159  *      Logical Minimum (0),
 160  *      Logical Maximum (255),
 161  *      Physical Minimum (0),
 162  *      Physical Maximum (255),
 163  *      Usage (X),                    ; X (30h, dynamic value)
 164  *      Usage (X),                    ; X (30h, dynamic value)
 165  *      Usage (X),                    ; X (30h, dynamic value)
 166  *      Usage (X),                    ; X (30h, dynamic value)
 167  *      Usage (Y),                    ; Y (31h, dynamic value)
 168  *      Input (Variable),
 169  *      Report Size (4),
 170  *      Report Count (1),
 171  *      Logical Maximum (7),
 172  *      Physical Maximum (315),
 173  *      Unit (Degrees),
 174  *      Usage (00h),
 175  *      Input (Variable, Null State),
 176  *      Unit,
 177  *      Report Size (1),
 178  *      Report Count (10),
 179  *      Logical Maximum (1),
 180  *      Physical Maximum (1),
 181  *      Usage Page (Button),          ; Button (09h)
 182  *      Usage Minimum (01h),
 183  *      Usage Maximum (0Ah),
 184  *      Input (Variable),
 185  *      Usage Page (FF00h),           ; FF00h, vendor-defined
 186  *      Report Size (1),
 187  *      Report Count (10),
 188  *      Logical Maximum (1),
 189  *      Physical Maximum (1),
 190  *      Usage (01h),
 191  *      Input (Variable),
 192  *    End Collection,
 193  *    Collection (Logical),
 194  *      Report Size (8),
 195  *      Report Count (4),
 196  *      Physical Maximum (255),
 197  *      Logical Maximum (255),
 198  *      Usage (02h),
 199  *      Output (Variable),
 200  *    End Collection,
 201  *  End Collection
 202  */
 203
 204 /* Size of the original descriptor of the PID 0x0011 joystick */
 205 #define PID0011_RDESC_ORIG_SIZE 101
 206
 207 /* Fixed report descriptor for PID 0x011 joystick */
 208 static __u8 pid0011_rdesc_fixed[] = {
 209         0x05, 0x01,         /*  Usage Page (Desktop),           */
 210         0x09, 0x04,         /*  Usage (Joystick),               */
 211         0xA1, 0x01,         /*  Collection (Application),       */
 212         0xA1, 0x02,         /*      Collection (Logical),       */
 213         0x14,               /*          Logical Minimum (0),    */
 214         0x75, 0x08,         /*          Report Size (8),        */
 215         0x95, 0x03,         /*          Report Count (3),       */
 216         0x81, 0x01,         /*          Input (Constant),       */
 217         0x26, 0xFF, 0x00,   /*          Logical Maximum (255),  */
 218         0x95, 0x02,         /*          Report Count (2),       */
 219         0x09, 0x30,         /*          Usage (X),              */
 220         0x09, 0x31,         /*          Usage (Y),              */
 221         0x81, 0x02,         /*          Input (Variable),       */
 222         0x75, 0x01,         /*          Report Size (1),        */
 223         0x95, 0x04,         /*          Report Count (4),       */
 224         0x81, 0x01,         /*          Input (Constant),       */
 225         0x25, 0x01,         /*          Logical Maximum (1),    */
 226         0x95, 0x0A,         /*          Report Count (10),      */
 227         0x05, 0x09,         /*          Usage Page (Button),    */
 228         0x19, 0x01,         /*          Usage Minimum (01h),    */
 229         0x29, 0x0A,         /*          Usage Maximum (0Ah),    */
 230         0x81, 0x02,         /*          Input (Variable),       */
 231         0x95, 0x0A,         /*          Report Count (10),      */
 232         0x81, 0x01,         /*          Input (Constant),       */
 233         0xC0,               /*      End Collection,             */
 234         0xC0                /*  End Collection                  */
 235 };
 236
 237 static __u8 *dr_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 238                                 unsigned int *rsize)
 239 {
 240         switch (hdev->product) {
 241         case 0x0011:
 242                 if (*rsize == PID0011_RDESC_ORIG_SIZE) {
 243                         rdesc = pid0011_rdesc_fixed;
 244                         *rsize = sizeof(pid0011_rdesc_fixed);
 245                 }
 246                 break;
 247         }
 248         return rdesc;
 249 }
 250
 251 #define map_abs(c)      hid_map_usage(hi, usage, bit, max, EV_ABS, (c))
 252 #define map_rel(c)      hid_map_usage(hi, usage, bit, max, EV_REL, (c))
 253
 254 static int dr_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 255                             struct hid_field *field, struct hid_usage *usage,
 256                             unsigned long **bit, int *max)
 257 {
 258         switch (usage->hid) {
 259         /*
 260          * revert to the old hid-input behavior where axes
 261          * can be randomly assigned when hid->usage is reused.
 262          */
 263         case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 264         case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 265                 if (field->flags & HID_MAIN_ITEM_RELATIVE)
 266                         map_rel(usage->hid & 0xf);
 267                 else
 268                         map_abs(usage->hid & 0xf);
 269                 return 1;
 270         }
 271
 272         return 0;
 273 }
 274
 275 static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id)
 276 {
 277         int ret;
 278
 279         dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe...");
 280
 281         ret = hid_parse(hdev);
 282         if (ret) {
 283                 hid_err(hdev, "parse failed\n");
 284                 goto err;
 285         }
 286
 287         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 288         if (ret) {
 289                 hid_err(hdev, "hw start failed\n");
 290                 goto err;
 291         }
 292
 293         switch (hdev->product) {
 294         case 0x0006:
 295                 ret = drff_init(hdev);
 296                 if (ret) {
 297                         dev_err(&hdev->dev, "force feedback init failed\n");
 298                         hid_hw_stop(hdev);
 299                         goto err;
 300                 }
 301                 break;
 302         }
 303
 304         return 0;
 305 err:
 306         return ret;
 307 }
 308
 309 static const struct hid_device_id dr_devices[] = {
 310         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006),  },
 311         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011),  },
 312         { }
 313 };
 314 MODULE_DEVICE_TABLE(hid, dr_devices);
 315
 316 static struct hid_driver dr_driver = {
 317         .name = "dragonrise",
 318         .id_table = dr_devices,
 319         .report_fixup = dr_report_fixup,
 320         .probe = dr_probe,
 321         .input_mapping = dr_input_mapping,
 322 };
 323 module_hid_driver(dr_driver);
 324
 325 MODULE_LICENSE("GPL");