projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| acc3e346 MF |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* | |
| 3 | * HID driver for PhoenixRC 8-axis flight controller | |
| 4 | * | |
| 5 | * Copyright (C) 2022 Marcus Folkesson <[email protected]> | |
| 6 | */ | |
| 7 | ||
| 8 | #include <linux/device.h> | |
| 9 | #include <linux/hid.h> | |
| 10 | #include <linux/module.h> | |
| 11 | ||
| 12 | #include "hid-ids.h" | |
| 13 | ||
| 14 | struct pxrc_priv { | |
| 15 | u8 slider; | |
| 16 | u8 dial; | |
| 17 | bool alternate; | |
| 18 | }; | |
| 19 | ||
| 20 | static __u8 pxrc_rdesc_fixed[] = { | |
| 21 | 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) | |
| 22 | 0x09, 0x04, // Usage (Joystick) | |
| 23 | 0xA1, 0x01, // Collection (Application) | |
| 24 | 0x09, 0x01, // Usage (Pointer) | |
| 25 | 0xA1, 0x00, // Collection (Physical) | |
| 26 | 0x09, 0x30, // Usage (X) | |
| 27 | 0x09, 0x36, // Usage (Slider) | |
| 28 | 0x09, 0x31, // Usage (Y) | |
| 29 | 0x09, 0x32, // Usage (Z) | |
| 30 | 0x09, 0x33, // Usage (Rx) | |
| 31 | 0x09, 0x34, // Usage (Ry) | |
| 32 | 0x09, 0x35, // Usage (Rz) | |
| 33 | 0x09, 0x37, // Usage (Dial) | |
| 34 | 0x15, 0x00, // Logical Minimum (0) | |
| 35 | 0x26, 0xFF, 0x00, // Logical Maximum (255) | |
| 36 | 0x35, 0x00, // Physical Minimum (0) | |
| 37 | 0x46, 0xFF, 0x00, // Physical Maximum (255) | |
| 38 | 0x75, 0x08, // Report Size (8) | |
| 39 | 0x95, 0x08, // Report Count (8) | |
| 40 | 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) | |
| 41 | 0xC0, // End Collection | |
| 42 | 0xC0, // End Collection | |
| 43 | }; | |
| 44 | ||
| 45 | static __u8 *pxrc_report_fixup(struct hid_device *hdev, __u8 *rdesc, | |
| 46 | unsigned int *rsize) | |
| 47 | { | |
| 48 | hid_info(hdev, "fixing up PXRC report descriptor\n"); | |
| 49 | *rsize = sizeof(pxrc_rdesc_fixed); | |
| 50 | return pxrc_rdesc_fixed; | |
| 51 | } | |
| 52 | ||
| 53 | static int pxrc_raw_event(struct hid_device *hdev, struct hid_report *report, | |
| 54 | u8 *data, int size) | |
| 55 | { | |
| 56 | struct pxrc_priv *priv = hid_get_drvdata(hdev); | |
| 57 | ||
| 58 | if (priv->alternate) | |
| 59 | priv->slider = data[7]; | |
| 60 | else | |
| 61 | priv->dial = data[7]; | |
| 62 | ||
| 63 | data[1] = priv->slider; | |
| 64 | data[7] = priv->dial; | |
| 65 | ||
| 66 | priv->alternate = !priv->alternate; | |
| 67 | return 0; | |
| 68 | } | |
| 69 | ||
| 70 | static int pxrc_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
| 71 | { | |
| 72 | int ret; | |
| 73 | struct pxrc_priv *priv; | |
| 74 | ||
| 75 | priv = devm_kzalloc(&hdev->dev, sizeof(*priv), GFP_KERNEL); | |
| 76 | if (!priv) | |
| 77 | return -ENOMEM; | |
| 78 | hid_set_drvdata(hdev, priv); | |
| 79 | ||
| 80 | ret = hid_parse(hdev); | |
| 81 | if (ret) { | |
| 82 | hid_err(hdev, "parse failed\n"); | |
| 83 | return ret; | |
| 84 | } | |
| 85 | ||
| 86 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); | |
| 87 | if (ret) { | |
| 88 | hid_err(hdev, "hw start failed\n"); | |
| 89 | return ret; | |
| 90 | } | |
| 91 | ||
| 92 | return 0; | |
| 93 | } | |
| 94 | ||
| 95 | static const struct hid_device_id pxrc_devices[] = { | |
| 96 | { HID_USB_DEVICE(USB_VENDOR_ID_MULTIPLE_1781, USB_DEVICE_ID_PHOENIXRC) }, | |
| 97 | { /* sentinel */ } | |
| 98 | }; | |
| 99 | MODULE_DEVICE_TABLE(hid, pxrc_devices); | |
| 100 | ||
| 101 | static struct hid_driver pxrc_driver = { | |
| 102 | .name = "hid-pxrc", | |
| 103 | .id_table = pxrc_devices, | |
| 104 | .report_fixup = pxrc_report_fixup, | |
| 105 | .probe = pxrc_probe, | |
| 106 | .raw_event = pxrc_raw_event, | |
| 107 | }; | |
| 108 | module_hid_driver(pxrc_driver); | |
| 109 | ||
| 110 | MODULE_AUTHOR("Marcus Folkesson <[email protected]>"); | |
| 111 | MODULE_DESCRIPTION("HID driver for PXRC 8-axis flight controller"); | |
| 112 | MODULE_LICENSE("GPL"); |