HID: Add driver for VRC-2 Car Controller (2c5e8e61) · Commits · EulixOS / Software / Kernel

MAINTAINERS

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		@@ -9065,6 +9065,12 @@ F: drivers/hid/hid-sensor-*
		F: drivers/iio//hid-
		F: include/linux/hid-sensor-*

		HID VRC-2 CAR CONTROLLER DRIVER
		M: Marcus Folkesson <marcus.folkesson@gmail.com>
		L: linux-input@vger.kernel.org
		S: Maintained
		F: drivers/hid/hid-vrc2.c

		HID WACOM DRIVER
		M: Ping Cheng <ping.cheng@wacom.com>
		M: Jason Gerecke <jason.gerecke@wacom.com>

drivers/hid/Kconfig

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		@@ -481,6 +481,16 @@ config HID_VIEWSONIC
		help
		Support for ViewSonic/Signotec PD1011 signature pad.

		config HID_VRC2
		tristate "VRC-2 Car Controller"
		depends on HID
		help
		Support for VRC-2 which is a 2-axis controller often used in
		car simulators.

		To compile this driver as a module, choose M here: the
		module will be called hid-vrc2.

		config HID_XIAOMI
		tristate "Xiaomi"
		depends on HID

drivers/hid/Makefile

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		@@ -136,6 +136,7 @@ obj-$(CONFIG_HID_XINMO) += hid-xinmo.o
		obj-$(CONFIG_HID_ZEROPLUS) += hid-zpff.o
		obj-$(CONFIG_HID_ZYDACRON) += hid-zydacron.o
		obj-$(CONFIG_HID_VIEWSONIC) += hid-viewsonic.o
		obj-$(CONFIG_HID_VRC2) += hid-vrc2.o

		wacom-objs := wacom_wac.o wacom_sys.o
		obj-$(CONFIG_HID_WACOM) += wacom.o

drivers/hid/hid-vrc2.c

0 → 100644

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		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* HID driver for VRC-2 2-axis Car controller
		*
		* Copyright (C) 2022 Marcus Folkesson <marcus.folkesson@gmail.com>
		*/

		#include <linux/device.h>
		#include <linux/hid.h>
		#include <linux/module.h>

		/*
		* VID/PID are probably "borrowed", so keep them locally and
		* do not populate hid-ids.h with those.
		*/
		#define USB_VENDOR_ID_VRC2 (0x07c0)
		#define USB_DEVICE_ID_VRC2 (0x1125)

		static __u8 vrc2_rdesc_fixed[] = {
		0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
		0x09, 0x04, // Usage (Joystick)
		0xA1, 0x01, // Collection (Application)
		0x09, 0x01, // Usage (Pointer)
		0xA1, 0x00, // Collection (Physical)
		0x09, 0x30, // Usage (X)
		0x09, 0x31, // Usage (Y)
		0x15, 0x00, // Logical Minimum (0)
		0x26, 0xFF, 0x07, // Logical Maximum (2047)
		0x35, 0x00, // Physical Minimum (0)
		0x46, 0xFF, 0x00, // Physical Maximum (255)
		0x75, 0x10, // Report Size (16)
		0x95, 0x02, // Report Count (2)
		0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
		0xC0, // End Collection
		0x75, 0x08, // Report Size (8)
		0x95, 0x03, // Report Count (3)
		0x81, 0x03, // Input (Cnst,Var,Abs)
		0xC0, // End Collection
		};

		static __u8 vrc2_report_fixup(struct hid_device hdev, __u8 *rdesc,
		unsigned int *rsize)
		{
		hid_info(hdev, "fixing up VRC-2 report descriptor\n");
		*rsize = sizeof(vrc2_rdesc_fixed);
		return vrc2_rdesc_fixed;
		}

		static int vrc2_probe(struct hid_device hdev, const struct hid_device_id id)
		{
		int ret;

		/*
		* The device gives us 2 separate USB endpoints.
		* One of those (the one with report descriptor size of 23) is just bogus so ignore it
		*/
		if (hdev->dev_rsize == 23)
		return -ENODEV;

		ret = hid_parse(hdev);
		if (ret) {
		hid_err(hdev, "parse failed\n");
		return ret;
		}

		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
		if (ret) {
		hid_err(hdev, "hw start failed\n");
		return ret;
		}

		return 0;
		}

		static const struct hid_device_id vrc2_devices[] = {
		{ HID_USB_DEVICE(USB_VENDOR_ID_VRC2, USB_DEVICE_ID_VRC2) },
		{ /* sentinel */ }
		};
		MODULE_DEVICE_TABLE(hid, vrc2_devices);

		static struct hid_driver vrc2_driver = {
		.name = "vrc2",
		.id_table = vrc2_devices,
		.report_fixup = vrc2_report_fixup,
		.probe = vrc2_probe,
		};
		module_hid_driver(vrc2_driver);

		MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
		MODULE_DESCRIPTION("HID driver for VRC-2 2-axis Car controller");
		MODULE_LICENSE("GPL");