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// 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 2in1 Adapter
* - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
*
* 0e8f:0003 "GreenAsia Inc. USB Joystick "
* - tested with König Gaming gamepad
*
* 0e8f:0003 "GASIA USB Gamepad"
* - another version of the König gamepad
*
* 0f30:0111 "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 / 0xffff;
right = right * plff->maxval / 0xffff;
*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 16bit
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 0e8f: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 = 0x7f;
if (report->field[0]->report_count >= 4) {
report->field[0]->value[0] = 0x00;
report->field[0]->value[1] = 0x00;
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 | 0x43) &&
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] = 0x00;
report->field[1]->value[0] = 0x00;
strong = &report->field[2]->value[0];
weak = &report->field[3]->value[0];
if (hid->vendor == USB_VENDOR_ID_JESS2)
maxval = 0xff;
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 = 0x00;
*weak = 0x00;
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, 0x0003), },
{ 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_LICENSE("GPL");
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