113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for PhoenixRC 8-axis flight controller
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*
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* Copyright (C) 2022 Marcus Folkesson <marcus.folkesson@gmail.com>
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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struct pxrc_priv {
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u8 slider;
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u8 dial;
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bool alternate;
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};
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static __u8 pxrc_rdesc_fixed[] = {
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0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
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0x09, 0x04, // Usage (Joystick)
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0xA1, 0x01, // Collection (Application)
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0x09, 0x01, // Usage (Pointer)
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0xA1, 0x00, // Collection (Physical)
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0x09, 0x30, // Usage (X)
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0x09, 0x36, // Usage (Slider)
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0x09, 0x31, // Usage (Y)
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0x09, 0x32, // Usage (Z)
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0x09, 0x33, // Usage (Rx)
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0x09, 0x34, // Usage (Ry)
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0x09, 0x35, // Usage (Rz)
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0x09, 0x37, // Usage (Dial)
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0x15, 0x00, // Logical Minimum (0)
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0x26, 0xFF, 0x00, // Logical Maximum (255)
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0x35, 0x00, // Physical Minimum (0)
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0x46, 0xFF, 0x00, // Physical Maximum (255)
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0x75, 0x08, // Report Size (8)
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0x95, 0x08, // Report Count (8)
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0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
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0xC0, // End Collection
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0xC0, // End Collection
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};
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static __u8 *pxrc_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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hid_info(hdev, "fixing up PXRC report descriptor\n");
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*rsize = sizeof(pxrc_rdesc_fixed);
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return pxrc_rdesc_fixed;
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}
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static int pxrc_raw_event(struct hid_device *hdev, struct hid_report *report,
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u8 *data, int size)
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{
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struct pxrc_priv *priv = hid_get_drvdata(hdev);
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if (priv->alternate)
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priv->slider = data[7];
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else
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priv->dial = data[7];
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data[1] = priv->slider;
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data[7] = priv->dial;
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priv->alternate = !priv->alternate;
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return 0;
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}
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static int pxrc_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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struct pxrc_priv *priv;
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priv = devm_kzalloc(&hdev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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hid_set_drvdata(hdev, priv);
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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);
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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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return 0;
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}
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static const struct hid_device_id pxrc_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_MULTIPLE_1781, USB_DEVICE_ID_PHOENIXRC) },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(hid, pxrc_devices);
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static struct hid_driver pxrc_driver = {
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.name = "hid-pxrc",
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.id_table = pxrc_devices,
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.report_fixup = pxrc_report_fixup,
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.probe = pxrc_probe,
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.raw_event = pxrc_raw_event,
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};
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module_hid_driver(pxrc_driver);
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MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
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MODULE_DESCRIPTION("HID driver for PXRC 8-axis flight controller");
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MODULE_LICENSE("GPL");
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