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