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Diffstat (limited to 'drivers/hid/hid-razer.c')
-rw-r--r--drivers/hid/hid-razer.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/hid/hid-razer.c b/drivers/hid/hid-razer.c
new file mode 100644
index 000000000..740df148b
--- /dev/null
+++ b/drivers/hid/hid-razer.c
@@ -0,0 +1,125 @@
+// 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 RAZER_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[RAZER_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_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_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, RAZER_BLACKWIDOW_TRANSFER_BUF_SIZE, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ ret = hid_hw_raw_request(hdev, 0, buf, RAZER_BLACKWIDOW_TRANSFER_BUF_SIZE,
+ HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+ if (ret != RAZER_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_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_devices);
+
+static struct hid_driver razer_driver = {
+ .name = "razer",
+ .id_table = razer_devices,
+ .input_mapping = razer_input_mapping,
+ .probe = razer_probe,
+};
+module_hid_driver(razer_driver);
+
+MODULE_AUTHOR("Jelle van der Waa <jvanderwaa@redhat.com>");
+MODULE_LICENSE("GPL");