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/*
* Force feedback support for PantherLord USB/PS2 2in1 Adapter devices
*
* Copyright (c) 2007 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
*/
/* #define DEBUG */
#define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include "usbhid.h"
struct plff_device {
struct hid_report *report;
};
static int hid_plff_play(struct input_dev *dev, void *data,
struct ff_effect *effect)
{
struct hid_device *hid = dev->private;
struct plff_device *plff = data;
int left, right;
left = effect->u.rumble.strong_magnitude;
right = effect->u.rumble.weak_magnitude;
debug("called with 0x%04x 0x%04x", left, right);
left = left * 0x7f / 0xffff;
right = right * 0x7f / 0xffff;
plff->report->field[0]->value[2] = left;
plff->report->field[0]->value[3] = right;
debug("running with 0x%02x 0x%02x", left, right);
usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
return 0;
}
int hid_plff_init(struct hid_device *hid)
{
struct plff_device *plff;
struct hid_report *report;
struct hid_input *hidinput;
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct list_head *report_ptr = report_list;
struct input_dev *dev;
int error;
/* The device contains 2 output reports (one for each
HID_QUIRK_MULTI_INPUT device), both containing 1 field, which
contains 4 ff00.0002 usages and 4 16bit absolute values.
The 2 input reports also contain a field which contains
8 ff00.0001 usages and 8 boolean values. Their meaning is
currently unknown. */
if (list_empty(report_list)) {
printk(KERN_ERR "hid-plff: no output reports found\n");
return -ENODEV;
}
list_for_each_entry(hidinput, &hid->inputs, list) {
report_ptr = report_ptr->next;
if (report_ptr == report_list) {
printk(KERN_ERR "hid-plff: required output report is missing\n");
return -ENODEV;
}
report = list_entry(report_ptr, struct hid_report, list);
if (report->maxfield < 1) {
printk(KERN_ERR "hid-plff: no fields in the report\n");
return -ENODEV;
}
if (report->field[0]->report_count < 4) {
printk(KERN_ERR "hid-plff: not enough values in the field\n");
return -ENODEV;
}
plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL);
if (!plff)
return -ENOMEM;
dev = hidinput->input;
set_bit(FF_RUMBLE, dev->ffbit);
error = input_ff_create_memless(dev, plff, hid_plff_play);
if (error) {
kfree(plff);
return error;
}
plff->report = report;
plff->report->field[0]->value[0] = 0x00;
plff->report->field[0]->value[1] = 0x00;
plff->report->field[0]->value[2] = 0x00;
plff->report->field[0]->value[3] = 0x00;
usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
}
printk(KERN_INFO "hid-plff: Force feedback for PantherLord USB/PS2 "
"2in1 Adapters by Anssi Hannula <anssi.hannula@gmail.com>\n");
return 0;
}
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