release/src-rt-6.x.4708/linux/linux-2.6.36/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 #include "usbhid/usbhid.h"
  37
  38 struct axff_device {
  39         struct hid_report *report;
  40 };
  41
  42 static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
  43 {
  44         struct hid_device *hid = input_get_drvdata(dev);
  45         struct axff_device *axff = data;
  46         int left, right;
  47
  48         left = effect->u.rumble.strong_magnitude;
  49         right = effect->u.rumble.weak_magnitude;
  50
  51         dbg_hid("called with 0x%04x 0x%04x", left, right);
  52
  53         left = left * 0xff / 0xffff;
  54         right = right * 0xff / 0xffff;
  55
  56         axff->report->field[0]->value[0] = left;
  57         axff->report->field[1]->value[0] = right;
  58         axff->report->field[2]->value[0] = left;
  59         axff->report->field[3]->value[0] = right;
  60         dbg_hid("running with 0x%02x 0x%02x", left, right);
  61         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
  62
  63         return 0;
  64 }
  65
  66 static int axff_init(struct hid_device *hid)
  67 {
  68         struct axff_device *axff;
  69         struct hid_report *report;
  70         struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
  71         struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list;
  72         struct input_dev *dev = hidinput->input;
  73         int error;
  74
  75         if (list_empty(report_list)) {
  76                 dev_err(&hid->dev, "no output reports found\n");
  77                 return -ENODEV;
  78         }
  79
  80         report = list_first_entry(report_list, struct hid_report, list);
  81
  82         if (report->maxfield < 4) {
  83                 dev_err(&hid->dev, "no fields in the report: %d\n", report->maxfield);
  84                 return -ENODEV;
  85         }
  86
  87         axff = kzalloc(sizeof(struct axff_device), GFP_KERNEL);
  88         if (!axff)
  89                 return -ENOMEM;
  90
  91         set_bit(FF_RUMBLE, dev->ffbit);
  92
  93         error = input_ff_create_memless(dev, axff, axff_play);
  94         if (error)
  95                 goto err_free_mem;
  96
  97         axff->report = report;
  98         axff->report->field[0]->value[0] = 0x00;
  99         axff->report->field[1]->value[0] = 0x00;
 100         axff->report->field[2]->value[0] = 0x00;
 101         axff->report->field[3]->value[0] = 0x00;
 102         usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
 103
 104         dev_info(&hid->dev, "Force Feedback for ACRUX game controllers by Sergei Kolzun<x0r@dv-life.ru>\n");
 105
 106         return 0;
 107
 108 err_free_mem:
 109         kfree(axff);
 110         return error;
 111 }
 112
 113 static int ax_probe(struct hid_device *hdev, const struct hid_device_id *id)
 114 {
 115         int error;
 116
 117         dev_dbg(&hdev->dev, "ACRUX HID hardware probe...");
 118
 119         error = hid_parse(hdev);
 120         if (error) {
 121                 dev_err(&hdev->dev, "parse failed\n");
 122                 return error;
 123         }
 124
 125         error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 126         if (error) {
 127                 dev_err(&hdev->dev, "hw start failed\n");
 128                 return error;
 129         }
 130
 131         error = axff_init(hdev);
 132         if (error) {
 133                 /*
 134                  * Do not fail device initialization completely as device
 135                  * may still be partially operable, just warn.
 136                  */
 137                 dev_warn(&hdev->dev,
 138                          "Failed to enable force feedback support, error: %d\n",
 139                          error);
 140         }
 141
 142         return 0;
 143 }
 144
 145 static const struct hid_device_id ax_devices[] = {
 146         { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802), },
 147         { }
 148 };
 149 MODULE_DEVICE_TABLE(hid, ax_devices);
 150
 151 static struct hid_driver ax_driver = {
 152         .name = "acrux",
 153         .id_table = ax_devices,
 154         .probe = ax_probe,
 155 };
 156
 157 static int __init ax_init(void)
 158 {
 159         return hid_register_driver(&ax_driver);
 160 }
 161
 162 static void __exit ax_exit(void)
 163 {
 164         hid_unregister_driver(&ax_driver);
 165 }
 166
 167 module_init(ax_init);
 168 module_exit(ax_exit);
 169
 170 MODULE_AUTHOR("Sergei Kolzun");
 171 MODULE_DESCRIPTION("Force feedback support for ACRUX game controllers");
 172 MODULE_LICENSE("GPL");