android_kernel_samsung_msm8976/drivers/hid/hid-drff.c
Jiri Kosina 0f6f4319a7 HID: fix hid-ff drivers so that devices work even without ff support
Currently, the hid-*ff force feedback drivers, which claim the blacklisted
device on a HID bus, are only compiled in if the user selects force feedback
support.

However we want the device to be supported even when the kernel is configured
without force feedback.

This patch fixes the drivers in a way that they get compiled even if force
feedback is turned off; all the force feedback support code is compiled out in
such case, and the driver works as a usual driver on HID bus, claiming and
initializing the device, making it operational without FF effects.

Reported-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-05-15 15:51:36 +02:00

196 lines
5 KiB
C

/*
* 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"
#ifdef CONFIG_DRAGONRISE_FF
#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;
}
#else
static inline int drff_init(struct hid_device *hid)
{
return 0;
}
#endif
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");