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/slab.h>
  32 #include <linux/usb.h>
  33 #include <linux/hid.h>
  34
  35 #include "hid-ids.h"
  36
  37 #ifdef CONFIG_DRAGONRISE_FF
  38 #include "usbhid/usbhid.h"
  39
  40 struct drff_device {
  41         struct hid_report *report;
  42 };
  43
  44 static int drff_play(struct input_dev *dev, void *data,
  45                                  struct ff_effect *effect)
  46 {
  47         struct hid_device *hid = input_get_drvdata(dev);
  48         struct drff_device *drff = data;
  49         int strong, weak;
  50
  51         strong = effect->u.rumble.strong_magnitude;
  52         weak = effect->u.rumble.weak_magnitude;
  53
  54         dbg_hid("called with 0x%04x 0x%04x", strong, weak);
  55
  56         if (strong || weak) {
  57                 strong = strong * 0xff / 0xffff;
  58                 weak = weak * 0xff / 0xffff;
  59
  60                 /* While reverse engineering this device, I found that when
  61                    this value is set, it causes the strong rumble to function
  62                    at a near maximum speed, so we'll bypass it. */
  63                 if (weak == 0x0a)
  64                         weak = 0x0b;
  65
  66                 drff->report->field[0]->value[0] = 0x51;
  67                 drff->report->field[0]->value[1] = 0x00;
  68                 drff->report->field[0]->value[2] = weak;
  69                 drff->report->field[0]->value[4] = strong;
  70                 usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
  71
  72                 drff->report->field[0]->value[0] = 0xfa;
  73                 drff->report->field[0]->value[1] = 0xfe;
  74         } else {
  75                 drff->report->field[0]->value[0] = 0xf3;
  76                 drff->report->field[0]->value[1] = 0x00;
  77         }
  78
  79         drff->report->field[0]->value[2] = 0x00;
  80         drff->report->field[0]->value[4] = 0x00;
  81         dbg_hid("running with 0x%02x 0x%02x", strong, weak);
  82         usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
  83
  84         return 0;
  85 }
  86
  87 static int drff_init(struct hid_device *hid)
  88 {
  89         struct drff_device *drff;
  90         struct hid_report *report;
  91         struct hid_input *hidinput = list_first_entry(&hid->inputs,
  92                                                 struct hid_input, list);
  93         struct list_head *report_list =
  94                         &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  95         struct input_dev *dev = hidinput->input;
  96         int error;
  97
  98         if (list_empty(report_list)) {
  99                 dev_err(&hid->dev, "no output reports found\n");
 100                 return -ENODEV;
 101         }
 102
 103         report = list_first_entry(report_list, struct hid_report, list);
 104         if (report->maxfield < 1) {
 105                 dev_err(&hid->dev, "no fields in the report\n");
 106                 return -ENODEV;
 107         }
 108
 109         if (report->field[0]->report_count < 7) {
 110                 dev_err(&hid->dev, "not enough values in the field\n");
 111                 return -ENODEV;
 112         }
 113
 114         drff = kzalloc(sizeof(struct drff_device), GFP_KERNEL);
 115         if (!drff)
 116                 return -ENOMEM;
 117
 118         set_bit(FF_RUMBLE, dev->ffbit);
 119
 120         error = input_ff_create_memless(dev, drff, drff_play);
 121         if (error) {
 122                 kfree(drff);
 123                 return error;
 124         }
 125
 126         drff->report = report;
 127         drff->report->field[0]->value[0] = 0xf3;
 128         drff->report->field[0]->value[1] = 0x00;
 129         drff->report->field[0]->value[2] = 0x00;
 130         drff->report->field[0]->value[3] = 0x00;
 131         drff->report->field[0]->value[4] = 0x00;
 132         drff->report->field[0]->value[5] = 0x00;
 133         drff->report->field[0]->value[6] = 0x00;
 134         usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
 135
 136         dev_info(&hid->dev, "Force Feedback for DragonRise Inc. game "
 137                "controllers by Richard Walmsley <richwalm@gmail.com>\n");
 138
 139         return 0;
 140 }
 141 #else
 142 static inline int drff_init(struct hid_device *hid)
 143 {
 144         return 0;
 145 }
 146 #endif
 147
 148 static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id)
 149 {
 150         int ret;
 151
 152         dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe...");
 153
 154         ret = hid_parse(hdev);
 155         if (ret) {
 156                 dev_err(&hdev->dev, "parse failed\n");
 157                 goto err;
 158         }
 159
 160         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 161         if (ret) {
 162                 dev_err(&hdev->dev, "hw start failed\n");
 163                 goto err;
 164         }
 165
 166         drff_init(hdev);
 167
 168         return 0;
 169 err:
 170         return ret;
 171 }
 172
 173 static const struct hid_device_id dr_devices[] = {
 174         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006),  },
 175         { }
 176 };
 177 MODULE_DEVICE_TABLE(hid, dr_devices);
 178
 179 static struct hid_driver dr_driver = {
 180         .name = "dragonrise",
 181         .id_table = dr_devices,
 182         .probe = dr_probe,
 183 };
 184
 185 static int __init dr_init(void)
 186 {
 187         return hid_register_driver(&dr_driver);
 188 }
 189
 190 static void __exit dr_exit(void)
 191 {
 192         hid_unregister_driver(&dr_driver);
 193 }
 194
 195 module_init(dr_init);
 196 module_exit(dr_exit);
 197 MODULE_LICENSE("GPL");