From 06be0d6442a07f73107964d7b56c21759c6dfb00 Mon Sep 17 00:00:00 2001 From: frank zago Date: Wed, 20 Apr 2022 21:40:41 -0500 Subject: HID: Add support for Mega World controller force feedback This patch adds support for one of the several Mega World USB game controller with integrated force feedback. It is a HID based memory-less game controller, with a weak motor on the left, and a strong one on the right. Signed-off-by: frank zago Signed-off-by: Jiri Kosina --- drivers/hid/hid-megaworld.c | 125 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100644 drivers/hid/hid-megaworld.c (limited to 'drivers/hid/hid-megaworld.c') diff --git a/drivers/hid/hid-megaworld.c b/drivers/hid/hid-megaworld.c new file mode 100644 index 000000000000..599657863cb9 --- /dev/null +++ b/drivers/hid/hid-megaworld.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Vibration support for Mega World controllers + * + * Copyright 2022 Frank Zago + * + * Derived from hid-zpff.c: + * Copyright (c) 2005, 2006 Anssi Hannula + */ + +#include +#include +#include +#include + +#include "hid-ids.h" + +struct mwctrl_device { + struct hid_report *report; + s32 *weak; + s32 *strong; +}; + +static int mwctrl_play(struct input_dev *dev, void *data, + struct ff_effect *effect) +{ + struct hid_device *hid = input_get_drvdata(dev); + struct mwctrl_device *mwctrl = data; + + *mwctrl->strong = effect->u.rumble.strong_magnitude >> 8; + *mwctrl->weak = effect->u.rumble.weak_magnitude >> 8; + + hid_hw_request(hid, mwctrl->report, HID_REQ_SET_REPORT); + + return 0; +} + +static int mwctrl_init(struct hid_device *hid) +{ + struct mwctrl_device *mwctrl; + struct hid_report *report; + struct hid_input *hidinput; + struct input_dev *dev; + int error; + int i; + + if (list_empty(&hid->inputs)) { + hid_err(hid, "no inputs found\n"); + return -ENODEV; + } + hidinput = list_entry(hid->inputs.next, struct hid_input, list); + dev = hidinput->input; + + for (i = 0; i < 4; i++) { + report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1); + if (!report) + return -ENODEV; + } + + mwctrl = kzalloc(sizeof(struct mwctrl_device), GFP_KERNEL); + if (!mwctrl) + return -ENOMEM; + + set_bit(FF_RUMBLE, dev->ffbit); + + error = input_ff_create_memless(dev, mwctrl, mwctrl_play); + if (error) { + kfree(mwctrl); + return error; + } + + mwctrl->report = report; + + /* Field 0 is always 2, and field 1 is always 0. The original + * windows driver has a 5 bytes command, where the 5th byte is + * a repeat of the 3rd byte, however the device has only 4 + * fields. It could be a bug in the driver, or there is a + * different device that needs it. + */ + report->field[0]->value[0] = 0x02; + + mwctrl->strong = &report->field[2]->value[0]; + mwctrl->weak = &report->field[3]->value[0]; + + return 0; +} + +static int mwctrl_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + int ret; + + ret = hid_parse(hdev); + if (ret) { + hid_err(hdev, "parse failed\n"); + return ret; + } + + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); + if (ret) { + hid_err(hdev, "hw start failed\n"); + return ret; + } + + ret = mwctrl_init(hdev); + if (ret) + hid_hw_stop(hdev); + + return ret; +} + +static const struct hid_device_id mwctrl_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_MEGAWORLD, + USB_DEVICE_ID_MEGAWORLD_GAMEPAD) }, + { } +}; +MODULE_DEVICE_TABLE(hid, mwctrl_devices); + +static struct hid_driver mwctrl_driver = { + .name = "megaworld", + .id_table = mwctrl_devices, + .probe = mwctrl_probe, +}; +module_hid_driver(mwctrl_driver); + +MODULE_LICENSE("GPL"); -- cgit v1.2.3