// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Force feedback support for PantherLord / GreenAsia based devices
*
* The devices are distributed under various names and the same USB device ID
* can be used in both adapters and actual game controllers .
*
* 0810 : 0001 " Twin USB Joystick "
* - tested with PantherLord USB / PS2 2 in1 Adapter
* - contains two reports , one for each port ( HID_QUIRK_MULTI_INPUT )
*
* 0 e8f : 0003 " GreenAsia Inc . USB Joystick "
* - tested with K ö nig Gaming gamepad
*
* 0 e8f : 0003 " GASIA USB Gamepad "
* - another version of the K ö nig gamepad
*
* 0 f30 : 0111 " Saitek Color Rumble Pad "
*
* Copyright ( c ) 2007 , 2009 Anssi Hannula < anssi . hannula @ gmail . com >
*/
/*
*/
/* #define DEBUG */
#define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/hid.h>
#include "hid-ids.h"
#ifdef CONFIG_PANTHERLORD_FF
struct plff_device {
struct hid_report *report;
s32 maxval;
s32 *strong;
s32 *weak;
};
static int hid_plff_play(struct input_dev *dev, void *data,
struct ff_effect *effect)
{
struct hid_device *hid = input_get_drvdata(dev);
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 * plff->maxval / 0 xffff;
right = right * plff->maxval / 0 xffff;
*plff->strong = left;
*plff->weak = right;
debug("running with 0x%02x 0x%02x" , left, right);
hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
return 0 ;
}
static int 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;
s32 maxval;
s32 *strong;
s32 *weak;
/* The device contains one output report per physical device, all
containing 1 field , which contains 4 ff00 . 0002 usages and 4 16 bit
absolute values .
The input reports also contain a field which contains
8 ff00 . 0001 usages and 8 boolean values . Their meaning is
currently unknown .
A version of the 0 e8f : 0003 exists that has all the values in
separate fields and misses the extra input field , thus resembling
Zeroplus ( hid - zpff ) devices .
*/
if (list_empty(report_list)) {
hid_err(hid, "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) {
hid_err(hid, "required output report is missing\n" );
return -ENODEV;
}
report = list_entry(report_ptr, struct hid_report, list);
if (report->maxfield < 1 ) {
hid_err(hid, "no fields in the report\n" );
return -ENODEV;
}
maxval = 0 x7f;
if (report->field[0 ]->report_count >= 4 ) {
report->field[0 ]->value[0 ] = 0 x00;
report->field[0 ]->value[1 ] = 0 x00;
strong = &report->field[0 ]->value[2 ];
weak = &report->field[0 ]->value[3 ];
debug("detected single-field device" );
} else if (report->field[0 ]->maxusage == 1 &&
report->field[0 ]->usage[0 ].hid ==
(HID_UP_LED | 0 x43) &&
report->maxfield >= 4 &&
report->field[0 ]->report_count >= 1 &&
report->field[1 ]->report_count >= 1 &&
report->field[2 ]->report_count >= 1 &&
report->field[3 ]->report_count >= 1 ) {
report->field[0 ]->value[0 ] = 0 x00;
report->field[1 ]->value[0 ] = 0 x00;
strong = &report->field[2 ]->value[0 ];
weak = &report->field[3 ]->value[0 ];
if (hid->vendor == USB_VENDOR_ID_JESS2)
maxval = 0 xff;
debug("detected 4-field device" );
} else {
hid_err(hid, "not enough fields or values\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->strong = strong;
plff->weak = weak;
plff->maxval = maxval;
*strong = 0 x00;
*weak = 0 x00;
hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT);
}
hid_info(hid, "Force feedback for PantherLord/GreenAsia devices by Anssi Hannula <anssi.hannula@gmail.com>\n" );
return 0 ;
}
#else
static inline int plff_init(struct hid_device *hid)
{
return 0 ;
}
#endif
static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int ret;
if (id->driver_data)
hdev->quirks |= HID_QUIRK_MULTI_INPUT;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n" );
goto err;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
if (ret) {
hid_err(hdev, "hw start failed\n" );
goto err;
}
plff_init(hdev);
return 0 ;
err:
return ret;
}
static const struct hid_device_id pl_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR),
.driver_data = 1 }, /* Twin USB Joystick */
{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR),
.driver_data = 1 }, /* Twin USB Joystick */
{ HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0 x0003), },
{ HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), },
{ }
};
MODULE_DEVICE_TABLE(hid, pl_devices);
static struct hid_driver pl_driver = {
.name = "pantherlord" ,
.id_table = pl_devices,
.probe = pl_probe,
};
module_hid_driver(pl_driver);
MODULE_DESCRIPTION("Force feedback support for PantherLord/GreenAsia based devices" );
MODULE_LICENSE("GPL" );
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