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-rw-r--r--drivers/hid/hid-topre.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/hid/hid-topre.c b/drivers/hid/hid-topre.c
new file mode 100644
index 000000000..88a91cdad
--- /dev/null
+++ b/drivers/hid/hid-topre.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * HID driver for Topre REALFORCE Keyboards
+ *
+ * Copyright (c) 2022 Harry Stern <harry@harrystern.net>
+ *
+ * Based on the hid-macally driver
+ */
+
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+MODULE_AUTHOR("Harry Stern <harry@harrystern.net>");
+MODULE_DESCRIPTION("REALFORCE R2 Keyboard driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * Fix the REALFORCE R2's non-boot interface's report descriptor to match the
+ * events it's actually sending. It claims to send array events but is instead
+ * sending variable events.
+ */
+static __u8 *topre_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ if (*rsize >= 119 && rdesc[69] == 0x29 && rdesc[70] == 0xe7 &&
+ rdesc[71] == 0x81 && rdesc[72] == 0x00) {
+ hid_info(hdev,
+ "fixing up Topre REALFORCE keyboard report descriptor\n");
+ rdesc[72] = 0x02;
+ }
+ return rdesc;
+}
+
+static const struct hid_device_id topre_id_table[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_TOPRE,
+ USB_DEVICE_ID_TOPRE_REALFORCE_R2_108) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, topre_id_table);
+
+static struct hid_driver topre_driver = {
+ .name = "topre",
+ .id_table = topre_id_table,
+ .report_fixup = topre_report_fixup,
+};
+
+module_hid_driver(topre_driver);