140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/*
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* Force feedback support for PantherLord/GreenAsia based devices
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*
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* The devices are distributed under various names and the same USB device ID
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* can be used in both adapters and actual game controllers.
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*
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* 0810:0001 "Twin USB Joystick"
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* - tested with PantherLord USB/PS2 2in1 Adapter
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* - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
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*
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* 0e8f:0003 "GreenAsia Inc. USB Joystick "
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* - tested with Köng Gaming gamepad
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*
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* Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.com>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* #define DEBUG */
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#define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
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#include <linux/input.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include "usbhid.h"
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struct plff_device {
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struct hid_report *report;
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};
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static int hid_plff_play(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct plff_device *plff = data;
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int left, right;
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left = effect->u.rumble.strong_magnitude;
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right = effect->u.rumble.weak_magnitude;
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debug("called with 0x%04x 0x%04x", left, right);
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left = left * 0x7f / 0xffff;
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right = right * 0x7f / 0xffff;
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plff->report->field[0]->value[2] = left;
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plff->report->field[0]->value[3] = right;
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debug("running with 0x%02x 0x%02x", left, right);
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usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
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return 0;
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}
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int hid_plff_init(struct hid_device *hid)
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{
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struct plff_device *plff;
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struct hid_report *report;
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struct hid_input *hidinput;
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struct list_head *report_list =
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&hid->report_enum[HID_OUTPUT_REPORT].report_list;
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struct list_head *report_ptr = report_list;
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struct input_dev *dev;
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int error;
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/* The device contains one output report per physical device, all
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containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
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absolute values.
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The input reports also contain a field which contains
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8 ff00.0001 usages and 8 boolean values. Their meaning is
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currently unknown. */
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if (list_empty(report_list)) {
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printk(KERN_ERR "hid-plff: no output reports found\n");
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return -ENODEV;
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}
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list_for_each_entry(hidinput, &hid->inputs, list) {
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report_ptr = report_ptr->next;
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if (report_ptr == report_list) {
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printk(KERN_ERR "hid-plff: required output report is missing\n");
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return -ENODEV;
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}
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report = list_entry(report_ptr, struct hid_report, list);
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if (report->maxfield < 1) {
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printk(KERN_ERR "hid-plff: no fields in the report\n");
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return -ENODEV;
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}
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if (report->field[0]->report_count < 4) {
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printk(KERN_ERR "hid-plff: not enough values in the field\n");
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return -ENODEV;
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}
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plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL);
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if (!plff)
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return -ENOMEM;
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dev = hidinput->input;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, plff, hid_plff_play);
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if (error) {
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kfree(plff);
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return error;
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}
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plff->report = report;
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plff->report->field[0]->value[0] = 0x00;
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plff->report->field[0]->value[1] = 0x00;
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plff->report->field[0]->value[2] = 0x00;
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plff->report->field[0]->value[3] = 0x00;
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usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
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}
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printk(KERN_INFO "hid-plff: Force feedback for PantherLord/GreenAsia "
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"devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
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return 0;
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}
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