tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'for-6.6/google' into for-linus
Add support for Google Stadia force feedback by Fabio Baltieri
+167
+7
drivers/hid/Kconfig
+7
drivers/hid/Kconfig
···
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help
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Say Y here if you have a Google Hammer device.
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+
config HID_GOOGLE_STADIA_FF
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tristate "Google Stadia force feedback"
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select INPUT_FF_MEMLESS
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help
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Say Y here if you want to enable force feedback support for the Google
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Stadia controller.
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config HID_VIVALDI
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tristate "Vivaldi Keyboard"
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select HID_VIVALDI_COMMON
+1
drivers/hid/Makefile
+1
drivers/hid/Makefile
···
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obj-$(CONFIG_HID_GLORIOUS) += hid-glorious.o
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obj-$(CONFIG_HID_VIVALDI_COMMON) += hid-vivaldi-common.o
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obj-$(CONFIG_HID_GOOGLE_HAMMER) += hid-google-hammer.o
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obj-$(CONFIG_HID_GOOGLE_STADIA_FF) += hid-google-stadiaff.o
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obj-$(CONFIG_HID_VIVALDI) += hid-vivaldi.o
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obj-$(CONFIG_HID_GT683R) += hid-gt683r.o
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obj-$(CONFIG_HID_GYRATION) += hid-gyration.o
+158
drivers/hid/hid-google-stadiaff.c
+158
drivers/hid/hid-google-stadiaff.c
···
1
+
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Stadia controller rumble support.
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*
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* Copyright 2023 Google LLC
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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/slab.h>
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#include <linux/module.h>
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+
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#include "hid-ids.h"
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+
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#define STADIA_FF_REPORT_ID 5
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+
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struct stadiaff_device {
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struct hid_device *hid;
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struct hid_report *report;
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spinlock_t lock;
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bool removed;
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uint16_t strong_magnitude;
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uint16_t weak_magnitude;
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struct work_struct work;
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};
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+
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static void stadiaff_work(struct work_struct *work)
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{
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struct stadiaff_device *stadiaff =
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container_of(work, struct stadiaff_device, work);
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struct hid_field *rumble_field = stadiaff->report->field[0];
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unsigned long flags;
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spin_lock_irqsave(&stadiaff->lock, flags);
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rumble_field->value[0] = stadiaff->strong_magnitude;
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rumble_field->value[1] = stadiaff->weak_magnitude;
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spin_unlock_irqrestore(&stadiaff->lock, flags);
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+
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hid_hw_request(stadiaff->hid, stadiaff->report, HID_REQ_SET_REPORT);
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}
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+
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static int stadiaff_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 stadiaff_device *stadiaff = hid_get_drvdata(hid);
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unsigned long flags;
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spin_lock_irqsave(&stadiaff->lock, flags);
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if (!stadiaff->removed) {
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stadiaff->strong_magnitude = effect->u.rumble.strong_magnitude;
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stadiaff->weak_magnitude = effect->u.rumble.weak_magnitude;
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schedule_work(&stadiaff->work);
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}
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spin_unlock_irqrestore(&stadiaff->lock, flags);
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+
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return 0;
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}
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+
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static int stadiaff_init(struct hid_device *hid)
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{
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struct stadiaff_device *stadiaff;
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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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+
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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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+
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report = hid_validate_values(hid, HID_OUTPUT_REPORT,
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STADIA_FF_REPORT_ID, 0, 2);
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if (!report)
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return -ENODEV;
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+
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stadiaff = devm_kzalloc(&hid->dev, sizeof(struct stadiaff_device),
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GFP_KERNEL);
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if (!stadiaff)
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return -ENOMEM;
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+
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hid_set_drvdata(hid, stadiaff);
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+
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input_set_capability(dev, EV_FF, FF_RUMBLE);
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+
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error = input_ff_create_memless(dev, NULL, stadiaff_play);
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if (error)
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return error;
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+
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stadiaff->removed = false;
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stadiaff->hid = hid;
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stadiaff->report = report;
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INIT_WORK(&stadiaff->work, stadiaff_work);
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spin_lock_init(&stadiaff->lock);
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hid_info(hid, "Force Feedback for Google Stadia controller\n");
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return 0;
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}
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static int stadia_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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+
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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 = stadiaff_init(hdev);
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if (ret) {
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hid_err(hdev, "force feedback init failed\n");
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hid_hw_stop(hdev);
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return ret;
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}
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+
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return 0;
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}
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+
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static void stadia_remove(struct hid_device *hid)
131
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{
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struct stadiaff_device *stadiaff = hid_get_drvdata(hid);
133
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unsigned long flags;
134
+
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spin_lock_irqsave(&stadiaff->lock, flags);
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stadiaff->removed = true;
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spin_unlock_irqrestore(&stadiaff->lock, flags);
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+
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cancel_work_sync(&stadiaff->work);
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hid_hw_stop(hid);
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}
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+
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static const struct hid_device_id stadia_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_STADIA) },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_STADIA) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, stadia_devices);
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+
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static struct hid_driver stadia_driver = {
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.name = "stadia",
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.id_table = stadia_devices,
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.probe = stadia_probe,
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.remove = stadia_remove,
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};
156
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module_hid_driver(stadia_driver);
157
+
158
+
MODULE_LICENSE("GPL");
+1
drivers/hid/hid-ids.h
+1
drivers/hid/hid-ids.h