drivers/hid/hid-axff.c

   1 /*
   2  * Force feedback support for ACRUX game controllers
   3  *
   4  * From what I have gathered, these devices are mass produced in China
   5  * by several vendors. They often share the same design as the original
   6  * Xbox 360 controller.
   7  *
   8  * 1a34:0802 "ACRUX USB GAMEPAD 8116"
   9  *  - tested with a EXEQ EQ-PCU-02090 game controller.
  10  *
  11  * Copyright (c) 2010 Sergei Kolzun <x0r@dv-life.ru>
  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 #include <linux/module.h>
  35
  36 #include "hid-ids.h"
  37
  38 #ifdef CONFIG_HID_ACRUX_FF
  39 #include "usbhid/usbhid.h"
  40
  41 struct axff_device {
  42         struct hid_report *report;
  43 };
  44
  45 static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
  46 {
  47         struct hid_device *hid = input_get_drvdata(dev);
  48         struct axff_device *axff = data;
  49         int left, right;
  50
  51         left = effect->u.rumble.strong_magnitude;
  52         right = effect->u.rumble.weak_magnitude;
  53
  54         dbg_hid("called with 0x%04x 0x%04x", left, right);
  55
  56         left = left * 0xff / 0xffff;
  57         right = right * 0xff / 0xffff;
  58
  59         axff->report->field[0]->value[0] = left;
  60         axff->report->field[1]->value[0] = right;
  61         axff->report->field[2]->value[0] = left;
  62         axff->report->field[3]->value[0] = right;
  63         dbg_hid("running with 0x%02x 0x%02x", left, right);
  64         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
  65
  66         return 0;
  67 }
  68
  69 static int axff_init(struct hid_device *hid)
  70 {
  71         struct axff_device *axff;
  72         struct hid_report *report;
  73         struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
  74         struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list;
  75         struct input_dev *dev = hidinput->input;
  76         int error;
  77
  78         if (list_empty(report_list)) {
  79                 hid_err(hid, "no output reports found\n");
  80                 return -ENODEV;
  81         }
  82
  83         report = list_first_entry(report_list, struct hid_report, list);
  84
  85         if (report->maxfield < 4) {
  86                 hid_err(hid, "no fields in the report: %d\n", report->maxfield);
  87                 return -ENODEV;
  88         }
  89
  90         axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL);
  91         if (!axff)
  92                 return -ENOMEM;
  93
  94         set_bit(FF_RUMBLE, dev->ffbit);
  95
  96         error = input_ff_create_memless(dev, axff, axff_play);
  97         if (error)
  98                 goto err_free_mem;
  99
 100         axff->report = report;
 101         axff->report->field[0]->value[0] = 0x00;
 102         axff->report->field[1]->value[0] = 0x00;
 103         axff->report->field[2]->value[0] = 0x00;
 104         axff->report->field[3]->value[0] = 0x00;
 105         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
 106
 107         hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun<x0r@dv-life.ru>\n");
 108
 109         return 0;
 110
 111 err_free_mem:
 112         kfree(axff);
 113         return error;
 114 }
 115 #else
 116 static inline int axff_init(struct hid_device *hid)
 117 {
 118         return 0;
 119 }
 120 #endif
 121
 122 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id)
 123 {
 124         int error;
 125
 126         dev_dbg(&hdev->dev, "ACRUX HID hardware probe...\n");
 127
 128         error = hid_parse(hdev);
 129         if (error) {
 130                 hid_err(hdev, "parse failed\n");
 131                 return error;
 132         }
 133
 134         error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 135         if (error) {
 136                 hid_err(hdev, "hw start failed\n");
 137                 return error;
 138         }
 139
 140         error = axff_init(hdev);
 141         if (error) {
 142                 /*
 143                  * Do not fail device initialization completely as device
 144                  * may still be partially operable, just warn.
 145                  */
 146                 hid_warn(hdev,
 147                          "Failed to enable force feedback support, error: %d\n",
 148                          error);
 149         }
 150
 151         /*
 152          * We need to start polling device right away, otherwise
 153          * it will go into a coma.
 154          */
 155         error = hid_hw_open(hdev);
 156         if (error) {
 157                 dev_err(&hdev->dev, "hw open failed\n");
 158                 hid_hw_stop(hdev);
 159                 return error;
 160         }
 161
 162         return 0;
 163 }
 164
 165 static void ax_remove(struct hid_device *hdev)
 166 {
 167         hid_hw_close(hdev);
 168         hid_hw_stop(hdev);
 169 }
 170
 171 static const struct hid_device_id ax_devices[] = {
 172         { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), },
 173         { }
 174 };
 175 MODULE_DEVICE_TABLE(hid, ax_devices);
 176
 177 static struct hid_driver ax_driver = {
 178         .name           = "acrux",
 179         .id_table       = ax_devices,
 180         .probe          = ax_probe,
 181         .remove         = ax_remove,
 182 };
 183
 184 static int __init ax_init(void)
 185 {
 186         return hid_register_driver(&ax_driver);
 187 }
 188
 189 static void __exit ax_exit(void)
 190 {
 191         hid_unregister_driver(&ax_driver);
 192 }
 193
 194 module_init(ax_init);
 195 module_exit(ax_exit);
 196
 197 MODULE_AUTHOR("Sergei Kolzun");
 198 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers");
 199 MODULE_LICENSE("GPL");