diff options
Diffstat (limited to 'drivers/hid/hid-pxrc.c')
| -rw-r--r-- | drivers/hid/hid-pxrc.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/drivers/hid/hid-pxrc.c b/drivers/hid/hid-pxrc.c new file mode 100644 index 000000000000..b0e517f9cde7 --- /dev/null +++ b/drivers/hid/hid-pxrc.c @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * HID driver for PhoenixRC 8-axis flight controller + * + * Copyright (C) 2022 Marcus Folkesson <marcus.folkesson@gmail.com> + */ + +#include <linux/device.h> +#include <linux/hid.h> +#include <linux/module.h> + +#include "hid-ids.h" + +struct pxrc_priv { + u8 slider; + u8 dial; + bool alternate; +}; + +static __u8 pxrc_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, 0x36, // Usage (Slider) + 0x09, 0x31, // Usage (Y) + 0x09, 0x32, // Usage (Z) + 0x09, 0x33, // Usage (Rx) + 0x09, 0x34, // Usage (Ry) + 0x09, 0x35, // Usage (Rz) + 0x09, 0x37, // Usage (Dial) + 0x15, 0x00, // Logical Minimum (0) + 0x26, 0xFF, 0x00, // Logical Maximum (255) + 0x35, 0x00, // Physical Minimum (0) + 0x46, 0xFF, 0x00, // Physical Maximum (255) + 0x75, 0x08, // Report Size (8) + 0x95, 0x08, // Report Count (8) + 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) + 0xC0, // End Collection + 0xC0, // End Collection +}; + +static __u8 *pxrc_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) +{ + hid_info(hdev, "fixing up PXRC report descriptor\n"); + *rsize = sizeof(pxrc_rdesc_fixed); + return pxrc_rdesc_fixed; +} + +static int pxrc_raw_event(struct hid_device *hdev, struct hid_report *report, + u8 *data, int size) +{ + struct pxrc_priv *priv = hid_get_drvdata(hdev); + + if (priv->alternate) + priv->slider = data[7]; + else + priv->dial = data[7]; + + data[1] = priv->slider; + data[7] = priv->dial; + + priv->alternate = !priv->alternate; + return 0; +} + +static int pxrc_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + int ret; + struct pxrc_priv *priv; + + priv = devm_kzalloc(&hdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + hid_set_drvdata(hdev, priv); + + 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 pxrc_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_MULTIPLE_1781, USB_DEVICE_ID_PHOENIXRC) }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(hid, pxrc_devices); + +static struct hid_driver pxrc_driver = { + .name = "hid-pxrc", + .id_table = pxrc_devices, + .report_fixup = pxrc_report_fixup, + .probe = pxrc_probe, + .raw_event = pxrc_raw_event, +}; +module_hid_driver(pxrc_driver); + +MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>"); +MODULE_DESCRIPTION("HID driver for PXRC 8-axis flight controller"); +MODULE_LICENSE("GPL"); |