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