Add support for the macro keys on the Razor Blackwidow keyboards. By
default the macro keys do not work and have to be enabled via a feature
report. After being enabled they report as XF86Tools, XF86Launch5-8.
Signed-off-by: Jelle van der Waa <jelle@xxxxxxxx>
---
drivers/hid/Kconfig | 7 ++++
drivers/hid/Makefile | 1 +
drivers/hid/hid-ids.h | 3 ++
drivers/hid/hid-razer.c | 78 +++++++++++++++++++++++++++++++++++++++++
4 files changed, 89 insertions(+)
create mode 100644 drivers/hid/hid-razer.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 3872e03d9a59..0b4bc464fc11 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -1135,6 +1135,13 @@ config HID_ALPS
Say Y here if you have a Alps touchpads over i2c-hid or usbhid
and want support for its special functionalities.
+config HID_RAZER
+ tristate "Razer Blackwidow keyboard support"
+ depends on HID
+ ---help---
+ Say Y here if you want the Razer Blackwidow keyboards to enable macro
+ keys.
+
endmenu
endif # HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index cc5d827c9164..417168a88193 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -121,6 +121,7 @@ obj-$(CONFIG_HID_XINMO) += hid-xinmo.o
obj-$(CONFIG_HID_ZEROPLUS) += hid-zpff.o
obj-$(CONFIG_HID_ZYDACRON) += hid-zydacron.o
obj-$(CONFIG_HID_VIEWSONIC) += hid-viewsonic.o
+obj-$(CONFIG_HID_RAZER) += hid-razer.o
wacom-objs := wacom_wac.o wacom_sys.o
obj-$(CONFIG_HID_WACOM) += wacom.o
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index b032d3899fa3..8f6ce553b52c 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -955,6 +955,9 @@
#define USB_VENDOR_ID_RAZER 0x1532
#define USB_DEVICE_ID_RAZER_BLADE_14 0x011D
+#define USB_DEVICE_ID_RAZER_BLACKWIDOW 0x010e
+#define USB_DEVICE_ID_RAZER_BLACKWIDOW_ULTIMATE 0x011a
+#define USB_DEVICE_ID_RAZER_BLACKWIDOW_2013 0x011b
#define USB_VENDOR_ID_REALTEK 0x0bda
#define USB_DEVICE_ID_REALTEK_READER 0x0152
diff --git a/drivers/hid/hid-razer.c b/drivers/hid/hid-razer.c
new file mode 100644
index 000000000000..d958fd9f9311
--- /dev/null
+++ b/drivers/hid/hid-razer.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * HID driver to enable macro keys on Razer keyboards
+ *
+ * Copyright (c) 2019 Jelle van der Waa <jelle@xxxxxxxx>
+ */
+
+#include <linux/hid.h>
+#include <linux/module.h>
+#include "hid-ids.h"
+
+#define RAZER_BLACKWIDOW_FEATURE_REPORT 0x00
+#define BUF_SIZE 91
+
+static const u8 data[BUF_SIZE] = {0, 0, 0, 0, 0, 0, 2, 0, 4, 2, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 4, 0};
+
+static const struct hid_device_id razer_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_2013) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLACKWIDOW_ULTIMATE) },
+ {}
+};
+
+MODULE_DEVICE_TABLE(hid, razer_devices);
+
+static int razer_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ struct hid_report_enum *rep_enum;
+ struct hid_report *rep;
+ unsigned char *dmabuf;
+ bool has_ff000002 = false;
+ int ret = 0;
+
+ dmabuf = kmemdup(data, BUF_SIZE, GFP_KERNEL);
+ if (!dmabuf)
+ return -ENOMEM;
+
+ hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
+
+ ret = hid_parse(hdev);
+ if (ret)
+ return ret;
+
+ rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
+ list_for_each_entry(rep, &rep_enum->report_list, list) {
+ if (rep->maxfield && rep->field[0]->maxusage)
+ if (rep->field[0]->usage[0].hid == 0xff000002)
+ has_ff000002 = true;
+ }
+
+ if (has_ff000002) {
+ ret = hid_hw_raw_request(hdev, RAZER_BLACKWIDOW_FEATURE_REPORT,
+ dmabuf, BUF_SIZE, HID_FEATURE_REPORT,
+ HID_REQ_SET_REPORT);
+ if (ret != BUF_SIZE)
+ hid_err(hdev, "Razer failed to enable macro keys\n");
+ }
+
+ kfree(dmabuf);
+
+ return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+}
+
+static struct hid_driver razer_driver = {
+ .name = "hid-razer",
+ .id_table = razer_devices,
+ .probe = razer_probe,
+};
+
+module_hid_driver(razer_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jelle van der Waa <jelle@xxxxxxxx");
+MODULE_DESCRIPTION("Razer blackwidow 2013/2014 HID driver");
--
2.22.0
