mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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bb3caf7f43
Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* Force feedback support for Zeroplus based devices
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*
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* Copyright (c) 2005, 2006 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-zpff: " format "\n" , ## arg)
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#include <linux/input.h>
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#include <linux/usb.h>
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#include "hid.h"
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struct zpff_device {
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struct hid_report *report;
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};
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static int hid_zpff_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 = dev->private;
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struct zpff_device *zpff = data;
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int left, right;
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/*
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* The following is specified the other way around in the Zeroplus
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* datasheet but the order below is correct for the XFX Executioner;
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* however it is possible that the XFX Executioner is an exception
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*/
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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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zpff->report->field[2]->value[0] = left;
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zpff->report->field[3]->value[0] = right;
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debug("running with 0x%02x 0x%02x", left, right);
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hid_submit_report(hid, zpff->report, USB_DIR_OUT);
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return 0;
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}
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int hid_zpff_init(struct hid_device *hid)
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{
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struct zpff_device *zpff;
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struct hid_report *report;
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struct hid_input *hidinput = list_entry(hid->inputs.next,
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struct hid_input, list);
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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 input_dev *dev = hidinput->input;
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int error;
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if (list_empty(report_list)) {
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printk(KERN_ERR "hid-zpff: no output report found\n");
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return -ENODEV;
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}
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report = list_entry(report_list->next, struct hid_report, list);
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if (report->maxfield < 4) {
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printk(KERN_ERR "hid-zpff: not enough fields in report\n");
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return -ENODEV;
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}
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zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
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if (!zpff)
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return -ENOMEM;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, zpff, hid_zpff_play);
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if (error) {
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kfree(zpff);
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return error;
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}
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zpff->report = report;
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zpff->report->field[0]->value[0] = 0x00;
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zpff->report->field[1]->value[0] = 0x02;
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zpff->report->field[2]->value[0] = 0x00;
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zpff->report->field[3]->value[0] = 0x00;
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hid_submit_report(hid, zpff->report, USB_DIR_OUT);
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printk(KERN_INFO "Force feedback for Zeroplus based devices by "
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"Anssi Hannula <anssi.hannula@gmail.com>\n");
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return 0;
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}
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