/* * Force feedback support for Logitech RumblePad and Rumblepad 2 * * Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com> */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/input.h> #include <linux/slab.h> #include <linux/usb.h> #include <linux/hid.h> #include "usbhid/usbhid.h" #include "hid-lg.h" struct lg2ff_device { struct hid_report *report; }; static int play_effect(struct input_dev *dev, void *data, struct ff_effect *effect) { struct hid_device *hid = input_get_drvdata(dev); struct lg2ff_device *lg2ff = data; int weak, strong; strong = effect->u.rumble.strong_magnitude; weak = effect->u.rumble.weak_magnitude; if (weak || strong) { weak = weak * 0xff / 0xffff; strong = strong * 0xff / 0xffff; lg2ff->report->field[0]->value[0] = 0x51; lg2ff->report->field[0]->value[2] = weak; lg2ff->report->field[0]->value[4] = strong; } else { lg2ff->report->field[0]->value[0] = 0xf3; lg2ff->report->field[0]->value[2] = 0x00; lg2ff->report->field[0]->value[4] = 0x00; } usbhid_submit_report(hid, lg2ff->report, USB_DIR_OUT); return 0; } int lg2ff_init(struct hid_device *hid) { struct lg2ff_device *lg2ff; struct hid_report *report; struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; struct input_dev *dev = hidinput->input; int error; if (list_empty(report_list)) { dev_err(&hid->dev, "no output report found\n"); return -ENODEV; } report = list_entry(report_list->next, struct hid_report, list); if (report->maxfield < 1) { dev_err(&hid->dev, "output report is empty\n"); return -ENODEV; } if (report->field[0]->report_count < 7) { dev_err(&hid->dev, "not enough values in the field\n"); return -ENODEV; } lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL); if (!lg2ff) return -ENOMEM; set_bit(FF_RUMBLE, dev->ffbit); error = input_ff_create_memless(dev, lg2ff, play_effect); if (error) { kfree(lg2ff); return error; } lg2ff->report = report; report->field[0]->value[0] = 0xf3; report->field[0]->value[1] = 0x00; report->field[0]->value[2] = 0x00; report->field[0]->value[3] = 0x00; report->field[0]->value[4] = 0x00; report->field[0]->value[5] = 0x00; report->field[0]->value[6] = 0x00; usbhid_submit_report(hid, report, USB_DIR_OUT); dev_info(&hid->dev, "Force feedback for Logitech RumblePad/Rumblepad 2 by " "Anssi Hannula <anssi.hannula@gmail.com>\n"); return 0; }