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047b6188b6
Add a driver to enable the macro keys (M1 - M5) by default, these are mapped to XF86Tools and XF86Launch5 - XF86Launch8. The driver remaps them by default to macro keys with an option to retain the old mapping which users most likely already use as there are many scripts to enable the macro keys available on Github and other websites. Signed-off-by: Jelle van der Waa <jvanderwaa@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* HID driver for gaming keys on Razer Blackwidow gaming keyboards
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* Macro Key Keycodes: M1 = 191, M2 = 192, M3 = 193, M4 = 194, M5 = 195
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*
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* Copyright (c) 2021 Jelle van der Waa <jvanderwaa@redhat.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 <linux/random.h>
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#include <linux/sched.h>
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#include <linux/usb.h>
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#include <linux/wait.h>
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#include "hid-ids.h"
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#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
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#define RAZER_BLACKWIDOW_TRANSFER_BUF_SIZE 91
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static bool macro_key_remapping = 1;
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module_param(macro_key_remapping, bool, 0644);
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MODULE_PARM_DESC(macro_key_remapping, " on (Y) off (N)");
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static unsigned char blackwidow_init[RAZER_BLACKWIDOW_TRANSFER_BUF_SIZE] = {
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0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x04,
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0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x04, 0x00
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};
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static int razer_input_mapping(struct hid_device *hdev,
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struct hid_input *hi, struct hid_field *field,
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struct hid_usage *usage, unsigned long **bit, int *max)
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{
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if (!macro_key_remapping)
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return 0;
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if ((usage->hid & HID_UP_KEYBOARD) != HID_UP_KEYBOARD)
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return 0;
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switch (usage->hid & ~HID_UP_KEYBOARD) {
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case 0x68:
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map_key_clear(KEY_MACRO1);
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return 1;
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case 0x69:
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map_key_clear(KEY_MACRO2);
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return 1;
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case 0x6a:
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map_key_clear(KEY_MACRO3);
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return 1;
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case 0x6b:
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map_key_clear(KEY_MACRO4);
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return 1;
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case 0x6c:
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map_key_clear(KEY_MACRO5);
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return 1;
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}
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return 0;
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}
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static int razer_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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char *buf;
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int ret = 0;
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ret = hid_parse(hdev);
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if (ret)
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return ret;
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/*
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* Only send the enable macro keys command for the third device
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* identified as mouse input.
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*/
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if (hdev->type == HID_TYPE_USBMOUSE) {
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buf = kmemdup(blackwidow_init, RAZER_BLACKWIDOW_TRANSFER_BUF_SIZE, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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ret = hid_hw_raw_request(hdev, 0, buf, RAZER_BLACKWIDOW_TRANSFER_BUF_SIZE,
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HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
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if (ret != RAZER_BLACKWIDOW_TRANSFER_BUF_SIZE)
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hid_err(hdev, "failed to enable macro keys: %d\n", ret);
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kfree(buf);
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}
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return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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}
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static const struct hid_device_id razer_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_RAZER,
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USB_DEVICE_ID_RAZER_BLACKWIDOW) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_RAZER,
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USB_DEVICE_ID_RAZER_BLACKWIDOW_CLASSIC) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_RAZER,
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USB_DEVICE_ID_RAZER_BLACKWIDOW_ULTIMATE) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, razer_devices);
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static struct hid_driver razer_driver = {
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.name = "razer",
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.id_table = razer_devices,
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.input_mapping = razer_input_mapping,
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.probe = razer_probe,
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};
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module_hid_driver(razer_driver);
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MODULE_AUTHOR("Jelle van der Waa <jvanderwaa@redhat.com>");
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MODULE_LICENSE("GPL");
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