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HID: stadia: Add Stadia controller rumble support
Signed-off-by: Alexandre Frade <kernel@xanmod.org>
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// SPDX-License-Identifier: GPL-2.0-or-later | ||
/* | ||
* Stadia controller rumble support. | ||
* | ||
* Copyright 2023 Google LLC | ||
*/ | ||
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#include <linux/hid.h> | ||
#include <linux/input.h> | ||
#include <linux/slab.h> | ||
#include <linux/module.h> | ||
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#include "hid-ids.h" | ||
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#define STADIA_FF_REPORT_ID 5 | ||
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struct stadiaff_device { | ||
struct hid_device *hid; | ||
struct hid_report *report; | ||
struct work_struct work; | ||
}; | ||
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static void stadiaff_work(struct work_struct *work) | ||
{ | ||
struct stadiaff_device *stadiaff = | ||
container_of(work, struct stadiaff_device, work); | ||
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hid_hw_request(stadiaff->hid, stadiaff->report, HID_REQ_SET_REPORT); | ||
} | ||
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static int stadiaff_play(struct input_dev *dev, void *data, | ||
struct ff_effect *effect) | ||
{ | ||
struct hid_device *hid = input_get_drvdata(dev); | ||
struct stadiaff_device *stadiaff = hid_get_drvdata(hid); | ||
struct hid_field *rumble_field = stadiaff->report->field[0]; | ||
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rumble_field->value[0] = effect->u.rumble.strong_magnitude; | ||
rumble_field->value[1] = effect->u.rumble.weak_magnitude; | ||
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schedule_work(&stadiaff->work); | ||
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return 0; | ||
} | ||
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static int stadiaff_init(struct hid_device *hid) | ||
{ | ||
struct stadiaff_device *stadiaff; | ||
struct hid_report *report; | ||
struct hid_input *hidinput; | ||
struct input_dev *dev; | ||
int error; | ||
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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; | ||
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report = hid_validate_values(hid, HID_OUTPUT_REPORT, | ||
STADIA_FF_REPORT_ID, 0, 2); | ||
if (!report) | ||
return -ENODEV; | ||
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stadiaff = devm_kzalloc(&hid->dev, sizeof(struct stadiaff_device), | ||
GFP_KERNEL); | ||
if (!stadiaff) | ||
return -ENOMEM; | ||
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hid_set_drvdata(hid, stadiaff); | ||
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input_set_capability(dev, EV_FF, FF_RUMBLE); | ||
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error = input_ff_create_memless(dev, NULL, stadiaff_play); | ||
if (error) | ||
return error; | ||
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stadiaff->hid = hid; | ||
stadiaff->report = report; | ||
INIT_WORK(&stadiaff->work, stadiaff_work); | ||
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hid_info(hid, "Force Feedback for Google Stadia controller\n"); | ||
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return 0; | ||
} | ||
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static int stadia_probe(struct hid_device *hdev, const struct hid_device_id *id) | ||
{ | ||
int ret; | ||
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ret = hid_parse(hdev); | ||
if (ret) { | ||
hid_err(hdev, "parse failed\n"); | ||
return ret; | ||
} | ||
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); | ||
if (ret) { | ||
hid_err(hdev, "hw start failed\n"); | ||
return ret; | ||
} | ||
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stadiaff_init(hdev); | ||
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return 0; | ||
} | ||
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static void stadia_remove(struct hid_device *hid) | ||
{ | ||
struct stadiaff_device *stadiaff = hid_get_drvdata(hid); | ||
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cancel_work_sync(&stadiaff->work); | ||
hid_hw_stop(hid); | ||
} | ||
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static const struct hid_device_id stadia_devices[] = { | ||
{ HID_USB_DEVICE(USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_STADIA) }, | ||
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_STADIA) }, | ||
{ } | ||
}; | ||
MODULE_DEVICE_TABLE(hid, stadia_devices); | ||
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static struct hid_driver stadia_driver = { | ||
.name = "stadia", | ||
.id_table = stadia_devices, | ||
.probe = stadia_probe, | ||
.remove = stadia_remove, | ||
}; | ||
module_hid_driver(stadia_driver); | ||
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MODULE_LICENSE("GPL"); |