mirror of
https://gitlab.com/arnekeller/microsoft-ergonomic-keyboard.git
synced 2024-11-09 09:30:36 +00:00
110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for the microsoft ergonomic keyboard
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*
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* Copyright (c) 2021 Arne Keller
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*/
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#include <linux/device.h>
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#include <linux/input.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#define USB_VENDOR_ID_MICROSOFT 0x045e
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#define USB_DEVICE_ID_MS_ERGONOMIC_KEYBOARD 0x082c
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#define MS_ERGONOMY2 BIT(8)
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struct ms_data {
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unsigned long quirks;
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struct hid_device *hdev;
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__u8 strong;
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__u8 weak;
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void *output_report_dmabuf;
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};
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static int ms_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 ms_data *ms = hid_get_drvdata(hdev);
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unsigned long quirks = ms->quirks;
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if (!(hdev->claimed & HID_CLAIMED_INPUT))
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return 0;
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if (quirks & MS_ERGONOMY2) {
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if (size == 8 && ((data[1] & 0x0f) == 0x0f)) {
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hid_info(hdev, "remapped button %x :)", data[1]);
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// weird Office button just simulates Left Shift + Ctrl + Alt + Super!
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data[1] |= 0x80; // other combination keys might also be pressed!
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data[1] &= 0xf0; // clear the 4 key mess
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}
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/*
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hid_info(hdev, "event of size %d", size);
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int size2 = size;
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while (size2 > 0) {
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printk(KERN_CONT " %x", *data);
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size2--;
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data++;
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}
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printk(KERN_CONT "\n");
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*/
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}
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return 0;
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}
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static int ms_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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unsigned long quirks = id->driver_data;
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struct ms_data *ms;
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int ret;
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ms = devm_kzalloc(&hdev->dev, sizeof(*ms), GFP_KERNEL);
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if (ms == NULL)
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return -ENOMEM;
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ms->quirks = quirks;
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hid_set_drvdata(hdev, ms);
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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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goto err_free;
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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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goto err_free;
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}
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return 0;
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err_free:
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return ret;
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}
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static void ms_remove(struct hid_device *hdev)
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{
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hid_hw_stop(hdev);
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}
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static const struct hid_device_id ms_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_ERGONOMIC_KEYBOARD),
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.driver_data = MS_ERGONOMY2},
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{ }
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};
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MODULE_DEVICE_TABLE(hid, ms_devices);
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static struct hid_driver ms_driver = {
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.name = "microsoft_ergonomic",
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.id_table = ms_devices,
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.raw_event = ms_raw_event,
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.probe = ms_probe,
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.remove = ms_remove,
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};
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module_hid_driver(ms_driver);
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MODULE_LICENSE("GPL");
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