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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
126 lines
2.7 KiB
C
126 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Vibration support for Mega World controllers
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*
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* Copyright 2022 Frank Zago
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*
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* Derived from hid-zpff.c:
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* Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
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*/
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#include <linux/hid.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "hid-ids.h"
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struct mwctrl_device {
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struct hid_report *report;
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s32 *weak;
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s32 *strong;
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};
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static int mwctrl_play(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct mwctrl_device *mwctrl = data;
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*mwctrl->strong = effect->u.rumble.strong_magnitude >> 8;
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*mwctrl->weak = effect->u.rumble.weak_magnitude >> 8;
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hid_hw_request(hid, mwctrl->report, HID_REQ_SET_REPORT);
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return 0;
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}
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static int mwctrl_init(struct hid_device *hid)
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{
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struct mwctrl_device *mwctrl;
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struct hid_report *report;
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struct hid_input *hidinput;
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struct input_dev *dev;
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int error;
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int i;
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if (list_empty(&hid->inputs)) {
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hid_err(hid, "no inputs found\n");
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return -ENODEV;
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}
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hidinput = list_entry(hid->inputs.next, struct hid_input, list);
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dev = hidinput->input;
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for (i = 0; i < 4; i++) {
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report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
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if (!report)
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return -ENODEV;
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}
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mwctrl = kzalloc_obj(struct mwctrl_device);
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if (!mwctrl)
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return -ENOMEM;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, mwctrl, mwctrl_play);
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if (error) {
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kfree(mwctrl);
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return error;
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}
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mwctrl->report = report;
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/* Field 0 is always 2, and field 1 is always 0. The original
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* windows driver has a 5 bytes command, where the 5th byte is
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* a repeat of the 3rd byte, however the device has only 4
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* fields. It could be a bug in the driver, or there is a
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* different device that needs it.
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*/
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report->field[0]->value[0] = 0x02;
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mwctrl->strong = &report->field[2]->value[0];
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mwctrl->weak = &report->field[3]->value[0];
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return 0;
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}
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static int mwctrl_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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ret = hid_parse(hdev);
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if (ret) {
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hid_err(hdev, "parse failed\n");
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return ret;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
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if (ret) {
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hid_err(hdev, "hw start failed\n");
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return ret;
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}
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ret = mwctrl_init(hdev);
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if (ret)
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hid_hw_stop(hdev);
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return ret;
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}
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static const struct hid_device_id mwctrl_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_MEGAWORLD,
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USB_DEVICE_ID_MEGAWORLD_GAMEPAD) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, mwctrl_devices);
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static struct hid_driver mwctrl_driver = {
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.name = "megaworld",
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.id_table = mwctrl_devices,
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.probe = mwctrl_probe,
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};
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module_hid_driver(mwctrl_driver);
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MODULE_DESCRIPTION("Vibration support for Mega World controllers");
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MODULE_LICENSE("GPL");
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