drivers/hid/hid-drff.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/usb.h>
  32 #include <linux/hid.h>
  33
  34 #include "hid-ids.h"
  35
  36 #ifdef CONFIG_DRAGONRISE_FF
  37 #include "usbhid/usbhid.h"
  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                 usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
  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         usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
  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                 dev_err(&hid->dev, "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                 dev_err(&hid->dev, "no fields in the report\n");
 105                 return -ENODEV;
 106         }
 107
 108         if (report->field[0]->report_count < 7) {
 109                 dev_err(&hid->dev, "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         usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
 134
 135         dev_info(&hid->dev, "Force Feedback for DragonRise Inc. game "
 136                "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 static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id)
 148 {
 149         int ret;
 150
 151         dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe...");
 152
 153         ret = hid_parse(hdev);
 154         if (ret) {
 155                 dev_err(&hdev->dev, "parse failed\n");
 156                 goto err;
 157         }
 158
 159         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 160         if (ret) {
 161                 dev_err(&hdev->dev, "hw start failed\n");
 162                 goto err;
 163         }
 164
 165         drff_init(hdev);
 166
 167         return 0;
 168 err:
 169         return ret;
 170 }
 171
 172 static const struct hid_device_id dr_devices[] = {
 173         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006),  },
 174         { }
 175 };
 176 MODULE_DEVICE_TABLE(hid, dr_devices);
 177
 178 static struct hid_driver dr_driver = {
 179         .name = "dragonrise",
 180         .id_table = dr_devices,
 181         .probe = dr_probe,
 182 };
 183
 184 static int __init dr_init(void)
 185 {
 186         return hid_register_driver(&dr_driver);
 187 }
 188
 189 static void __exit dr_exit(void)
 190 {
 191         hid_unregister_driver(&dr_driver);
 192 }
 193
 194 module_init(dr_init);
 195 module_exit(dr_exit);
 196 MODULE_LICENSE("GPL");