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/*
* Force feedback support for DragonRise Inc. game controllers
*
* From what I have gathered, these devices are mass produced in China and are
* distributed under several vendors. They often share the same design as
* the original PlayStation DualShock controller.
*
* 0079:0006 "DragonRise Inc. Generic USB Joystick "
* - tested with a Tesun USB-703 game controller.
*
* Copyright (c) 2009 Richard Walmsley <richwalm@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
*/
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include "hid-ids.h"
#include "usbhid/usbhid.h"
struct drff_device {
struct hid_report *report;
};
static int drff_play(struct input_dev *dev, void *data,
struct ff_effect *effect)
{
struct hid_device *hid = input_get_drvdata(dev);
struct drff_device *drff = data;
int strong, weak;
strong = effect->u.rumble.strong_magnitude;
weak = effect->u.rumble.weak_magnitude;
dbg_hid("called with 0x%04x 0x%04x", strong, weak);
if (strong || weak) {
strong = strong * 0xff / 0xffff;
weak = weak * 0xff / 0xffff;
/* While reverse engineering this device, I found that when
this value is set, it causes the strong rumble to function
at a near maximum speed, so we'll bypass it. */
if (weak == 0x0a)
weak = 0x0b;
drff->report->field[0]->value[0] = 0x51;
drff->report->field[0]->value[1] = 0x00;
drff->report->field[0]->value[2] = weak;
drff->report->field[0]->value[4] = strong;
usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
drff->report->field[0]->value[0] = 0xfa;
drff->report->field[0]->value[1] = 0xfe;
} else {
drff->report->field[0]->value[0] = 0xf3;
drff->report->field[0]->value[1] = 0x00;
}
drff->report->field[0]->value[2] = 0x00;
drff->report->field[0]->value[4] = 0x00;
dbg_hid("running with 0x%02x 0x%02x", strong, weak);
usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
return 0;
}
static int drff_init(struct hid_device *hid)
{
struct drff_device *drff;
struct hid_report *report;
struct hid_input *hidinput = list_first_entry(&hid->inputs,
struct hid_input, list);
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev = hidinput->input;
int error;
if (list_empty(report_list)) {
dev_err(&hid->dev, "no output reports found\n");
return -ENODEV;
}
report = list_first_entry(report_list, struct hid_report, list);
if (report->maxfield < 1) {
dev_err(&hid->dev, "no fields in the report\n");
return -ENODEV;
}
if (report->field[0]->report_count < 7) {
dev_err(&hid->dev, "not enough values in the field\n");
return -ENODEV;
}
drff = kzalloc(sizeof(struct drff_device), GFP_KERNEL);
if (!drff)
return -ENOMEM;
set_bit(FF_RUMBLE, dev->ffbit);
error = input_ff_create_memless(dev, drff, drff_play);
if (error) {
kfree(drff);
return error;
}
drff->report = report;
drff->report->field[0]->value[0] = 0xf3;
drff->report->field[0]->value[1] = 0x00;
drff->report->field[0]->value[2] = 0x00;
drff->report->field[0]->value[3] = 0x00;
drff->report->field[0]->value[4] = 0x00;
drff->report->field[0]->value[5] = 0x00;
drff->report->field[0]->value[6] = 0x00;
usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
dev_info(&hid->dev, "Force Feedback for DragonRise Inc. game "
"controllers by Richard Walmsley <richwalm@gmail.com>\n");
return 0;
}
static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int ret;
dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe...");
ret = hid_parse(hdev);
if (ret) {
dev_err(&hdev->dev, "parse failed\n");
goto err;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
if (ret) {
dev_err(&hdev->dev, "hw start failed\n");
goto err;
}
drff_init(hdev);
return 0;
err:
return ret;
}
static const struct hid_device_id dr_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006), },
{ }
};
MODULE_DEVICE_TABLE(hid, dr_devices);
static struct hid_driver dr_driver = {
.name = "dragonrise",
.id_table = dr_devices,
.probe = dr_probe,
};
static int __init dr_init(void)
{
return hid_register_driver(&dr_driver);
}
static void __exit dr_exit(void)
{
hid_unregister_driver(&dr_driver);
}
module_init(dr_init);
module_exit(dr_exit);
MODULE_LICENSE("GPL");
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