linux/drivers/hid/hid-gaff.c
<<
>>
Prefs
   1/*
   2 *  Force feedback support for GreenAsia (Product ID 0x12) based devices
   3 *
   4 *  The devices are distributed under various names and the same USB device ID
   5 *  can be used in many game controllers.
   6 *
   7 *
   8 *  0e8f:0012 "GreenAsia Inc.    USB Joystick     "
   9 *   - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635.
  10 *
  11 *  Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
  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#include "hid-ids.h"
  36
  37#ifdef CONFIG_GREENASIA_FF
  38#include "usbhid/usbhid.h"
  39
  40struct gaff_device {
  41        struct hid_report *report;
  42};
  43
  44static int hid_gaff_play(struct input_dev *dev, void *data,
  45                         struct ff_effect *effect)
  46{
  47        struct hid_device *hid = input_get_drvdata(dev);
  48        struct gaff_device *gaff = 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 * 0xfe / 0xffff;
  57        right = right * 0xfe / 0xffff;
  58
  59        gaff->report->field[0]->value[0] = 0x51;
  60        gaff->report->field[0]->value[1] = 0x0;
  61        gaff->report->field[0]->value[2] = right;
  62        gaff->report->field[0]->value[3] = 0;
  63        gaff->report->field[0]->value[4] = left;
  64        gaff->report->field[0]->value[5] = 0;
  65        dbg_hid("running with 0x%02x 0x%02x", left, right);
  66        usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
  67
  68        gaff->report->field[0]->value[0] = 0xfa;
  69        gaff->report->field[0]->value[1] = 0xfe;
  70        gaff->report->field[0]->value[2] = 0x0;
  71        gaff->report->field[0]->value[4] = 0x0;
  72
  73        usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
  74
  75        return 0;
  76}
  77
  78static int gaff_init(struct hid_device *hid)
  79{
  80        struct gaff_device *gaff;
  81        struct hid_report *report;
  82        struct hid_input *hidinput = list_entry(hid->inputs.next,
  83                                                struct hid_input, list);
  84        struct list_head *report_list =
  85                        &hid->report_enum[HID_OUTPUT_REPORT].report_list;
  86        struct list_head *report_ptr = report_list;
  87        struct input_dev *dev = hidinput->input;
  88        int error;
  89
  90        if (list_empty(report_list)) {
  91                hid_err(hid, "no output reports found\n");
  92                return -ENODEV;
  93        }
  94
  95        report_ptr = report_ptr->next;
  96
  97        report = list_entry(report_ptr, struct hid_report, list);
  98        if (report->maxfield < 1) {
  99                hid_err(hid, "no fields in the report\n");
 100                return -ENODEV;
 101        }
 102
 103        if (report->field[0]->report_count < 6) {
 104                hid_err(hid, "not enough values in the field\n");
 105                return -ENODEV;
 106        }
 107
 108        gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
 109        if (!gaff)
 110                return -ENOMEM;
 111
 112        set_bit(FF_RUMBLE, dev->ffbit);
 113
 114        error = input_ff_create_memless(dev, gaff, hid_gaff_play);
 115        if (error) {
 116                kfree(gaff);
 117                return error;
 118        }
 119
 120        gaff->report = report;
 121        gaff->report->field[0]->value[0] = 0x51;
 122        gaff->report->field[0]->value[1] = 0x00;
 123        gaff->report->field[0]->value[2] = 0x00;
 124        gaff->report->field[0]->value[3] = 0x00;
 125        usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
 126
 127        gaff->report->field[0]->value[0] = 0xfa;
 128        gaff->report->field[0]->value[1] = 0xfe;
 129
 130        usbhid_submit_report(hid, gaff->report, USB_DIR_OUT);
 131
 132        hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
 133
 134        return 0;
 135}
 136#else
 137static inline int gaff_init(struct hid_device *hdev)
 138{
 139        return 0;
 140}
 141#endif
 142
 143static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id)
 144{
 145        int ret;
 146
 147        dev_dbg(&hdev->dev, "Greenasia HID hardware probe...");
 148
 149        ret = hid_parse(hdev);
 150        if (ret) {
 151                hid_err(hdev, "parse failed\n");
 152                goto err;
 153        }
 154
 155        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 156        if (ret) {
 157                hid_err(hdev, "hw start failed\n");
 158                goto err;
 159        }
 160
 161        gaff_init(hdev);
 162
 163        return 0;
 164err:
 165        return ret;
 166}
 167
 168static const struct hid_device_id ga_devices[] = {
 169        { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012),  },
 170        { }
 171};
 172MODULE_DEVICE_TABLE(hid, ga_devices);
 173
 174static struct hid_driver ga_driver = {
 175        .name = "greenasia",
 176        .id_table = ga_devices,
 177        .probe = ga_probe,
 178};
 179
 180static int __init ga_init(void)
 181{
 182        return hid_register_driver(&ga_driver);
 183}
 184
 185static void __exit ga_exit(void)
 186{
 187        hid_unregister_driver(&ga_driver);
 188}
 189
 190module_init(ga_init);
 191module_exit(ga_exit);
 192MODULE_LICENSE("GPL");
 193
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.