[PATCH] HID: Add driver for Razer Blackwidow keyboards
From: Jelle van der Waa <hidden>
Date: 2021-12-31 11:25:15
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 <redacted> --- drivers/hid/Kconfig | 7 ++ drivers/hid/Makefile | 1 + drivers/hid/hid-ids.h | 3 + drivers/hid/hid-razer-blackwidow.c | 122 +++++++++++++++++++++++++++++ 4 files changed, 133 insertions(+) create mode 100644 drivers/hid/hid-razer-blackwidow.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index a7c78ac96270..7f4f891c9853 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig@@ -915,6 +915,13 @@ config PLAYSTATION_FF Say Y here if you would like to enable force feedback support for PlayStation game controllers. +config HID_RAZER_BLACKWIDOW + tristate "Razer Blackwidow non-fully HID-compliant devices" + depends on HID + help + Support for Razer devices that are not fully compliant with the + HID standard. + config HID_PRIMAX tristate "Primax non-fully HID-compliant devices" depends on HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 55a6fa3eca5a..e2a9f506f87e 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile@@ -98,6 +98,7 @@ hid-picolcd-$(CONFIG_DEBUG_FS) += hid-picolcd_debugfs.o obj-$(CONFIG_HID_PLANTRONICS) += hid-plantronics.o obj-$(CONFIG_HID_PLAYSTATION) += hid-playstation.o obj-$(CONFIG_HID_PRIMAX) += hid-primax.o +obj-$(CONFIG_HID_RAZER_BLACKWIDOW) += hid-razer-blackwidow.o obj-$(CONFIG_HID_REDRAGON) += hid-redragon.o obj-$(CONFIG_HID_RETRODE) += hid-retrode.o obj-$(CONFIG_HID_ROCCAT) += hid-roccat.o hid-roccat-common.o \
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 19da07777d62..793efdd0a93d 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h@@ -1024,6 +1024,9 @@ #define I2C_PRODUCT_ID_RAYDIUM_3118 0x3118 #define USB_VENDOR_ID_RAZER 0x1532 +#define USB_DEVICE_ID_RAZER_BLACKWIDOW_ULTIMATE 0x010D +#define USB_DEVICE_ID_RAZER_BLACKWIDOW 0x010e +#define USB_DEVICE_ID_RAZER_BLACKWIDOW_CLASSIC 0x011b #define USB_DEVICE_ID_RAZER_BLADE_14 0x011D #define USB_VENDOR_ID_REALTEK 0x0bda
diff --git a/drivers/hid/hid-razer-blackwidow.c b/drivers/hid/hid-razer-blackwidow.c
new file mode 100644
index 000000000000..8668a143837f
--- /dev/null
+++ b/drivers/hid/hid-razer-blackwidow.c@@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * HID driver for gaming keys on Razer Blackwidow gaming keyboards + * Macro Key Keycodes: M1 = 191, M2 = 192, M3 = 193, M4 = 194, M5 = 195 + * + * Copyright (c) 2021 Jelle van der Waa <jvanderwaa@redhat.com> + */ + +#include <linux/device.h> +#include <linux/hid.h> +#include <linux/module.h> +#include <linux/random.h> +#include <linux/sched.h> +#include <linux/usb.h> +#include <linux/wait.h> + +#include "hid-ids.h" + +#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c)) + +#define RAZOR_BLACKWIDOW_TRANSFER_BUF_SIZE 91 + +static bool macro_key_remapping = 1; +module_param(macro_key_remapping, bool, 0644); +MODULE_PARM_DESC(macro_key_remapping, " on (Y) off (N)"); + + +static unsigned char blackwidow_init[RAZOR_BLACKWIDOW_TRANSFER_BUF_SIZE] = { + 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x04, + 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x04, 0x00 +}; + +static int razer_blackwidow_input_mapping(struct hid_device *hdev, + struct hid_input *hi, struct hid_field *field, + struct hid_usage *usage, unsigned long **bit, int *max) +{ + + if (!macro_key_remapping) + return 0; + + if ((usage->hid & HID_UP_KEYBOARD) != HID_UP_KEYBOARD) + return 0; + + switch (usage->hid & ~HID_UP_KEYBOARD) { + case 0x68: + map_key_clear(KEY_MACRO1); + return 1; + case 0x69: + map_key_clear(KEY_MACRO2); + return 1; + case 0x6a: + map_key_clear(KEY_MACRO3); + return 1; + case 0x6b: + map_key_clear(KEY_MACRO4); + return 1; + case 0x6c: + map_key_clear(KEY_MACRO5); + return 1; + } + + return 0; +} + +static int razer_blackwidow_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + char *buf; + int ret = 0; + + ret = hid_parse(hdev); + if (ret) + return ret; + + // Only send the enable macro keys command for the third device identified as mouse input. + if (hdev->type == HID_TYPE_USBMOUSE) { + buf = kmemdup(blackwidow_init, RAZOR_BLACKWIDOW_TRANSFER_BUF_SIZE, GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + ret = hid_hw_raw_request(hdev, 0, buf, RAZOR_BLACKWIDOW_TRANSFER_BUF_SIZE, + HID_FEATURE_REPORT, HID_REQ_SET_REPORT); + if (ret != RAZOR_BLACKWIDOW_TRANSFER_BUF_SIZE) + hid_err(hdev, "failed to enable macro keys: %d\n", ret); + + kfree(buf); + } + + return hid_hw_start(hdev, HID_CONNECT_DEFAULT); +} + +static const struct hid_device_id razer_blackwidow_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, + USB_DEVICE_ID_RAZER_BLACKWIDOW) }, + { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, + USB_DEVICE_ID_RAZER_BLACKWIDOW_CLASSIC) }, + { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, + USB_DEVICE_ID_RAZER_BLACKWIDOW_ULTIMATE) }, + { } +}; +MODULE_DEVICE_TABLE(hid, razer_blackwidow_devices); + +static struct hid_driver razer_blackwidow_driver = { + .name = "razer-blackwidow", + .id_table = razer_blackwidow_devices, + .input_mapping = razer_blackwidow_input_mapping, + .probe = razer_blackwidow_probe, +}; +module_hid_driver(razer_blackwidow_driver); + +MODULE_AUTHOR("Jelle van der Waa <jvanderwaa@redhat.com>"); +MODULE_LICENSE("GPL");
--
2.34.1