forked from Minki/linux
dc76c91214
Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/*
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* Force feedback support for various HID compliant devices by ThrustMaster:
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* ThrustMaster FireStorm Dual Power 2
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* and possibly others whose device ids haven't been added.
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*
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* Modified to support ThrustMaster devices by Zinx Verituse
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* on 2003-01-25 from the Logitech force feedback driver,
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* which is by Johann Deneux.
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*
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* Copyright (c) 2003 Zinx Verituse <zinx@epicsol.org>
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* Copyright (c) 2002 Johann Deneux
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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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#include <linux/input.h>
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#undef DEBUG
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#include <linux/usb.h>
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#include "hid.h"
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/* Usages for thrustmaster devices I know about */
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#define THRUSTMASTER_USAGE_RUMBLE_LR (HID_UP_GENDESK | 0xbb)
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struct tmff_device {
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struct hid_report *report;
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struct hid_field *rumble;
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};
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/* Changes values from 0 to 0xffff into values from minimum to maximum */
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static inline int hid_tmff_scale(unsigned int in, int minimum, int maximum)
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{
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int ret;
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ret = (in * (maximum - minimum) / 0xffff) + minimum;
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if (ret < minimum)
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return minimum;
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if (ret > maximum)
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return maximum;
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return ret;
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}
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static int hid_tmff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
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{
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struct hid_device *hid = dev->private;
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struct tmff_device *tmff = data;
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int left, right; /* Rumbling */
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left = hid_tmff_scale(effect->u.rumble.weak_magnitude,
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tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
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right = hid_tmff_scale(effect->u.rumble.strong_magnitude,
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tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
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tmff->rumble->value[0] = left;
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tmff->rumble->value[1] = right;
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dbg("(left,right)=(%08x, %08x)", left, right);
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hid_submit_report(hid, tmff->report, USB_DIR_OUT);
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return 0;
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}
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int hid_tmff_init(struct hid_device *hid)
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{
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struct tmff_device *tmff;
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struct list_head *pos;
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struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
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struct input_dev *input_dev = hidinput->input;
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int error;
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tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
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if (!tmff)
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return -ENOMEM;
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/* Find the report to use */
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__list_for_each(pos, &hid->report_enum[HID_OUTPUT_REPORT].report_list) {
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struct hid_report *report = (struct hid_report *)pos;
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int fieldnum;
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for (fieldnum = 0; fieldnum < report->maxfield; ++fieldnum) {
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struct hid_field *field = report->field[fieldnum];
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if (field->maxusage <= 0)
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continue;
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switch (field->usage[0].hid) {
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case THRUSTMASTER_USAGE_RUMBLE_LR:
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if (field->report_count < 2) {
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warn("ignoring THRUSTMASTER_USAGE_RUMBLE_LR with report_count < 2");
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continue;
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}
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if (field->logical_maximum == field->logical_minimum) {
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warn("ignoring THRUSTMASTER_USAGE_RUMBLE_LR with logical_maximum == logical_minimum");
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continue;
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}
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if (tmff->report && tmff->report != report) {
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warn("ignoring THRUSTMASTER_USAGE_RUMBLE_LR in other report");
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continue;
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}
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if (tmff->rumble && tmff->rumble != field) {
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warn("ignoring duplicate THRUSTMASTER_USAGE_RUMBLE_LR");
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continue;
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}
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tmff->report = report;
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tmff->rumble = field;
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set_bit(FF_RUMBLE, input_dev->ffbit);
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break;
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default:
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warn("ignoring unknown output usage %08x", field->usage[0].hid);
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continue;
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}
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}
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}
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error = input_ff_create_memless(input_dev, tmff, hid_tmff_play);
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if (error) {
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kfree(tmff);
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return error;
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}
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info("Force feedback for ThrustMaster rumble pad devices by Zinx Verituse <zinx@epicsol.org>");
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return 0;
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}
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