[PATCH v4 02/11] HID: hexLIN: Add support for USB LIN adapter

[Christoph Fritz <christoph.fritz@hexdev.de>]

Introduce driver support for hexDEV hexLIN USB LIN adapter, enabling LIN
communication over USB for both controller and responder modes. The
driver interfaces with the CAN_LIN framework for userland connectivity.

For more details on the adapter, visit: https://hexdev.de/hexlin/

Tested-by: Andreas Lauser <andreas.lauser@mercedes-benz.com>
Signed-off-by: Christoph Fritz <christoph.fritz@hexdev.de>
---
 drivers/hid/Kconfig             |  19 +
 drivers/hid/Makefile            |   1 +
 drivers/hid/hid-hexdev-hexlin.c | 609 ++++++++++++++++++++++++++++++++
 drivers/hid/hid-ids.h           |   1 +
 drivers/hid/hid-quirks.c        |   3 +
 5 files changed, 633 insertions(+)
 create mode 100644 drivers/hid/hid-hexdev-hexlin.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 08446c89eff6e..682e3ab5fdfe5 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -496,6 +496,25 @@ config HID_GYRATION
 	help
 	Support for Gyration remote control.
 
+config HID_MCS_HEXDEV
+	tristate "hexDEV LIN-BUS adapter support"
+	depends on HID && CAN_NETLINK && CAN_DEV
+	select CAN_LIN
+	help
+	  Support for hexDEV its hexLIN USB LIN bus adapter.
+
+	  Local Interconnect Network (LIN) to USB adapter for controller and
+	  responder usage.
+	  This device driver is using CAN_LIN for a userland connection on
+	  one side and USB HID for the actual hardware adapter on the other
+	  side.
+
+	  If you have such an adapter, say Y here and see
+	  <https://hexdev.de/hexlin>.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called hid-hexlin.
+
 config HID_ICADE
 	tristate "ION iCade arcade controller"
 	help
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index ce71b53ea6c54..6af678f283548 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_HID_GOOGLE_STADIA_FF)	+= hid-google-stadiaff.o
 obj-$(CONFIG_HID_VIVALDI)	+= hid-vivaldi.o
 obj-$(CONFIG_HID_GT683R)	+= hid-gt683r.o
 obj-$(CONFIG_HID_GYRATION)	+= hid-gyration.o
+obj-$(CONFIG_HID_MCS_HEXDEV)	+= hid-hexdev-hexlin.o
 obj-$(CONFIG_HID_HOLTEK)	+= hid-holtek-kbd.o
 obj-$(CONFIG_HID_HOLTEK)	+= hid-holtek-mouse.o
 obj-$(CONFIG_HID_HOLTEK)	+= hid-holtekff.o
diff --git a/drivers/hid/hid-hexdev-hexlin.c b/drivers/hid/hid-hexdev-hexlin.c
new file mode 100644
index 0000000000000..a9ed080b3e33e
--- /dev/null
+++ b/drivers/hid/hid-hexdev-hexlin.c
@@ -0,0 +1,609 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * LIN bus USB adapter driver https://hexdev.de/hexlin
+ *
+ * Copyright (C) 2024 hexDEV GmbH
+ */
+
+#include <linux/completion.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/wait.h>
+#include <net/lin.h>
+#include "hid-ids.h"
+
+#define HEXLIN_PKGLEN_MAX	64
+#define HEXLIN_LEN_RETCODE	1
+
+enum {
+	/* answers */
+	HEXLIN_SUCCESS			= 0x01,
+	HEXLIN_FRAME			= 0x02,
+	HEXLIN_ERROR			= 0x03,
+	HEXLIN_FAIL			= 0x0F,
+	/* lin-responder */
+	HEXLIN_SET_MODE_RESPONDER	= 0x10,
+	HEXLIN_SET_RESPONDER_ANSWER_ID	= 0x11,
+	HEXLIN_GET_RESPONDER_ANSWER_ID	= 0x12,
+	/* lin-controller */
+	HEXLIN_SET_MODE_CONTROLLER	= 0x20,
+	HEXLIN_SEND_BREAK		= 0x21,
+	HEXLIN_SEND_UNCONDITIONAL_FRAME	= 0x22,
+	/* lin-div */
+	HEXLIN_SET_BAUDRATE		= 0x34,
+	HEXLIN_GET_BAUDRATE		= 0x35,
+	/* div */
+	HEXLIN_RESET			= 0xF0,
+	HEXLIN_GET_VERSION		= 0xF1,
+};
+
+struct hexlin_val8_req {
+	u8 cmd;
+	u8 v;
+} __packed;
+
+struct hexlin_baudrate_req {
+	u8 cmd;
+	__le16 baudrate;
+} __packed;
+
+struct hexlin_frame {
+	__le32 flags;
+	u8 len;
+	u8 lin_id;
+	u8 data[LIN_MAX_DLEN];
+	u8 checksum;
+	u8 checksum_mode;
+} __packed;
+
+struct hexlin_unconditional_req {
+	u8 cmd;
+	struct hexlin_frame frm;
+} __packed;
+
+struct hexlin_responder_answer {
+	u8 is_active;
+	u8 is_event_frame;
+	u8 event_associated_id;
+	struct hexlin_frame frm;
+} __packed;
+
+struct hexlin_responder_answer_req {
+	u8 cmd;
+	struct hexlin_responder_answer answ;
+} __packed;
+
+struct hexlin_priv_data {
+	struct hid_device *hid_dev;
+	struct lin_device *ldev;
+	u16 baudrate;
+	struct completion wait_in_report;
+	bool is_error;
+	struct mutex tx_lock;  /* protects hexlin_tx_report() */
+	struct hexlin_responder_answer answ;
+	u8 fw_version;
+};
+
+static int hexlin_tx_req_status(struct hexlin_priv_data *priv,
+				const void *out_report, int len)
+{
+	unsigned long t;
+	int n, ret = 0;
+
+	mutex_lock(&priv->tx_lock);
+
+	reinit_completion(&priv->wait_in_report);
+
+	n = hid_hw_output_report(priv->hid_dev, (__u8 *) out_report, len);
+	if (n < 0) {
+		mutex_unlock(&priv->tx_lock);
+		return n;
+	}
+	if (n != len) {
+		mutex_unlock(&priv->tx_lock);
+		return -EIO;
+	}
+
+	t = wait_for_completion_killable_timeout(&priv->wait_in_report, HZ);
+	if (!t)
+		ret = -ETIMEDOUT;
+
+	if (priv->is_error)
+		ret = -EINVAL;
+
+	mutex_unlock(&priv->tx_lock);
+
+	return ret;
+}
+
+#define HEXLIN_GET_CMD(name, enum_cmd)					\
+	static int hexlin_##name(struct hexlin_priv_data *p)		\
+	{								\
+		u8 *req;						\
+		int ret;						\
+									\
+		req = kmalloc(sizeof(*req), GFP_KERNEL)	;		\
+		if (!req)						\
+			return -ENOMEM;					\
+									\
+		*req = enum_cmd;					\
+									\
+		ret = hexlin_tx_req_status(p, req, sizeof(*req));	\
+		if (ret)						\
+			hid_err(p->hid_dev, "%s failed, error: %d\n",	\
+				#name, ret);				\
+									\
+		kfree(req);						\
+		return ret;						\
+	}
+
+HEXLIN_GET_CMD(get_version, HEXLIN_GET_VERSION)
+HEXLIN_GET_CMD(reset_dev, HEXLIN_RESET)
+HEXLIN_GET_CMD(get_baudrate, HEXLIN_GET_BAUDRATE)
+
+#define HEXLIN_VAL_CMD(name, enum_cmd, struct_type, vtype)		\
+	static int hexlin_##name(struct hexlin_priv_data *p, vtype val)	\
+	{								\
+		struct struct_type *req;				\
+		int ret;						\
+									\
+		req = kmalloc(sizeof(*req), GFP_KERNEL)	;		\
+		if (!req)						\
+			return -ENOMEM;					\
+									\
+		req->cmd = enum_cmd;					\
+		req->v = val;						\
+									\
+		ret = hexlin_tx_req_status(p, req, sizeof(*req));	\
+		if (ret)						\
+			hid_err(p->hid_dev, "%s failed, error: %d\n",	\
+				#name, ret);				\
+									\
+		kfree(req);						\
+		return ret;						\
+	}
+
+HEXLIN_VAL_CMD(send_break, HEXLIN_SEND_BREAK, hexlin_val8_req, u8)
+
+static int hexlin_send_unconditional(struct hexlin_priv_data *priv,
+				     const struct hexlin_frame *hxf)
+{
+	struct hexlin_unconditional_req *req;
+	int ret;
+
+	if (hxf->lin_id > LIN_ID_MASK)
+		return -EINVAL;
+
+	req = kmalloc(sizeof(*req), GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	req->cmd = HEXLIN_SEND_UNCONDITIONAL_FRAME;
+	memcpy(&req->frm, hxf, sizeof(*hxf));
+
+	ret = hexlin_tx_req_status(priv, req, sizeof(*req));
+	if (ret)
+		hid_err(priv->hid_dev, "unconditional tx failed: %d\n", ret);
+
+	kfree(req);
+	return ret;
+}
+
+static int hexlin_set_baudrate(struct hexlin_priv_data *priv, u16 baudrate)
+{
+	struct hexlin_baudrate_req *req;
+	int ret;
+
+	if (baudrate < LIN_MIN_BAUDRATE || baudrate > LIN_MAX_BAUDRATE)
+		return -EINVAL;
+
+	req = kmalloc(sizeof(*req), GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	req->cmd = HEXLIN_SET_BAUDRATE;
+	req->baudrate = cpu_to_le16(baudrate);
+
+	ret = hexlin_tx_req_status(priv, req, sizeof(*req));
+	if (ret)
+		hid_err(priv->hid_dev, "set baudrate failed: %d\n", ret);
+
+	kfree(req);
+	return ret;
+}
+
+static int hexlin_get_responder_answer_id(struct hexlin_priv_data *priv, u8 id,
+					  struct hexlin_responder_answer *ransw)
+{
+	struct hexlin_val8_req *req;
+	int ret;
+
+	if (id > LIN_ID_MASK)
+		return -EINVAL;
+
+	req = kmalloc(sizeof(*req), GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	req->cmd = HEXLIN_GET_RESPONDER_ANSWER_ID;
+	req->v = id;
+
+	ret = hexlin_tx_req_status(priv, req, sizeof(*req));
+	if (ret) {
+		hid_err(priv->hid_dev, "get respond answer failed: %d\n", ret);
+		kfree(req);
+		return ret;
+	}
+
+	memcpy(ransw, &priv->answ, sizeof(priv->answ));
+
+	kfree(req);
+	return 0;
+}
+
+static int hexlin_set_responder_answer_id(struct hexlin_priv_data *priv,
+					  const struct lin_responder_answer *answ)
+{
+	struct hexlin_responder_answer_req *req;
+	int ret;
+
+	if (answ->lf.lin_id > LIN_ID_MASK ||
+	    answ->event_associated_id > LIN_ID_MASK)
+		return -EINVAL;
+
+	req = kmalloc(sizeof(*req), GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	req->cmd = HEXLIN_SET_RESPONDER_ANSWER_ID;
+	req->answ.is_active = answ->is_active;
+	req->answ.is_event_frame = answ->is_event_frame;
+	req->answ.event_associated_id = answ->event_associated_id;
+	req->answ.frm.len = answ->lf.len;
+	req->answ.frm.lin_id = answ->lf.lin_id;
+	memcpy(req->answ.frm.data, answ->lf.data, LIN_MAX_DLEN);
+	req->answ.frm.checksum = answ->lf.checksum;
+	req->answ.frm.checksum_mode = answ->lf.checksum_mode;
+
+	ret = hexlin_tx_req_status(priv, req, sizeof(*req));
+	if (ret)
+		hid_err(priv->hid_dev, "set respond answer failed: %d\n", ret);
+
+	kfree(req);
+	return ret;
+}
+
+static int hexlin_open(struct lin_device *ldev)
+{
+	struct hid_device *hdev = to_hid_device(ldev->dev);
+
+	return hid_hw_open(hdev);
+}
+
+static int hexlin_stop(struct lin_device *ldev)
+{
+	struct hid_device *hdev = to_hid_device(ldev->dev);
+	struct hexlin_priv_data *priv = hid_get_drvdata(hdev);
+
+	hid_hw_close(hdev);
+
+	priv->is_error = true;
+	complete(&priv->wait_in_report);
+
+	return 0;
+}
+
+static int hexlin_ldo_tx(struct lin_device *ldev,
+			 const struct lin_frame *lf)
+{
+	struct hid_device *hdev = to_hid_device(ldev->dev);
+	struct hexlin_priv_data *priv = hid_get_drvdata(hdev);
+	int ret = -EINVAL;
+
+	hid_dbg(hdev, "id:%02x, len:%u, data:%*ph, checksum:%02x (%s)\n",
+		   lf->lin_id, lf->len, lf->len, lf->data, lf->checksum,
+		   lf->checksum_mode ? "enhanced" : "classic");
+
+	if (lf->lin_id && lf->len == 0) {
+		ret = hexlin_send_break(priv, lf->lin_id);
+	} else if (lf->len <= LIN_MAX_DLEN) {
+		struct hexlin_frame hxf;
+
+		hxf.len = lf->len;
+		hxf.lin_id = lf->lin_id;
+		memcpy(&hxf.data, lf->data, LIN_MAX_DLEN);
+		hxf.checksum = lf->checksum;
+		hxf.checksum_mode = lf->checksum_mode;
+		ret = hexlin_send_unconditional(priv, &hxf);
+	} else {
+		hid_err(hdev, "unknown format\n");
+	}
+
+	return ret;
+}
+
+static int hexlin_update_bitrate(struct lin_device *ldev, u16 bitrate)
+{
+	struct hid_device *hdev = to_hid_device(ldev->dev);
+	struct hexlin_priv_data *priv = hid_get_drvdata(hdev);
+	int ret;
+
+	hid_dbg(hdev, "update bitrate to: %u\n", bitrate);
+
+	ret = hexlin_open(ldev);
+	if (ret)
+		return ret;
+
+	ret = hexlin_set_baudrate(priv, bitrate);
+	if (ret)
+		return ret;
+
+	ret = hexlin_get_baudrate(priv);
+	if (ret)
+		return ret;
+
+	if (priv->baudrate != bitrate) {
+		hid_err(hdev, "update bitrate failed\n");
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static int hexlin_get_responder_answer(struct lin_device *ldev, u8 id,
+				       struct lin_responder_answer *answ)
+{
+	struct hid_device *hdev = to_hid_device(ldev->dev);
+	struct hexlin_priv_data *priv = hid_get_drvdata(hdev);
+	struct hexlin_responder_answer ransw;
+	int ret;
+
+	if (answ == NULL)
+		return -EINVAL;
+
+	ret = hexlin_get_responder_answer_id(priv, id, &ransw);
+	if (ret)
+		return ret;
+
+	answ->is_active = ransw.is_active;
+	answ->is_event_frame = ransw.is_event_frame;
+	answ->event_associated_id = ransw.event_associated_id;
+	answ->lf.len = ransw.frm.len;
+	answ->lf.lin_id = ransw.frm.lin_id;
+	memcpy(answ->lf.data, ransw.frm.data, LIN_MAX_DLEN);
+	answ->lf.checksum = ransw.frm.checksum;
+	answ->lf.checksum_mode = ransw.frm.checksum_mode;
+
+	return 0;
+}
+
+static int hexlin_update_resp_answer(struct lin_device *ldev,
+				     const struct lin_responder_answer *answ)
+{
+	struct hid_device *hdev = to_hid_device(ldev->dev);
+	struct hexlin_priv_data *priv = hid_get_drvdata(hdev);
+
+	if (answ == NULL)
+		return -EINVAL;
+
+	return hexlin_set_responder_answer_id(priv, answ);
+}
+
+static const struct lin_device_ops hexlin_ldo = {
+	.ldo_open = hexlin_open,
+	.ldo_stop = hexlin_stop,
+	.ldo_tx = hexlin_ldo_tx,
+	.update_bitrate = hexlin_update_bitrate,
+	.get_responder_answer = hexlin_get_responder_answer,
+	.update_responder_answer = hexlin_update_resp_answer,
+};
+
+static int hexlin_queue_frames_insert(struct hexlin_priv_data *priv,
+				      const struct hexlin_frame *hxf)
+{
+	struct hid_device *hdev = priv->hid_dev;
+	struct lin_frame lf;
+
+	lf.len = hxf->len;
+	lf.lin_id = hxf->lin_id;
+	memcpy(lf.data, hxf->data, LIN_MAX_DLEN);
+	lf.checksum = hxf->checksum;
+	lf.checksum_mode = hxf->checksum_mode;
+
+	hid_dbg(hdev, "id:%02x, len:%u, data:%*ph, chk:%02x (%s), flg:%08x\n",
+		lf.lin_id, lf.len, lf.len, lf.data, lf.checksum,
+		lf.checksum_mode ? "enhanced" : "classic", hxf->flags);
+
+	lin_rx(priv->ldev, &lf);
+
+	return 0;
+}
+
+static int hexlin_raw_event(struct hid_device *hdev,
+			    struct hid_report *report, u8 *data, int sz)
+{
+	struct hexlin_priv_data *priv;
+	struct hexlin_baudrate_req *br;
+	struct hexlin_responder_answer_req *rar;
+	struct hexlin_unconditional_req *hfr;
+	struct hexlin_val8_req *vr;
+
+	if (sz < 1 || sz > HEXLIN_PKGLEN_MAX)
+		return -EREMOTEIO;
+
+	priv = hid_get_drvdata(hdev);
+
+	hid_dbg(hdev, "%s, size:%i, data[0]: 0x%02x\n", __func__, sz, data[0]);
+
+	priv->is_error = false;
+
+	switch (data[0]) {
+	case HEXLIN_SUCCESS:
+		if (sz != HEXLIN_LEN_RETCODE)
+			return -EREMOTEIO;
+		hid_dbg(hdev, "HEXLIN_SUCCESS: 0x%02x\n", data[0]);
+		complete(&priv->wait_in_report);
+		break;
+	case HEXLIN_FAIL:
+		if (sz != HEXLIN_LEN_RETCODE)
+			return -EREMOTEIO;
+		hid_err(hdev, "HEXLIN_FAIL: 0x%02x\n", data[0]);
+		priv->is_error = true;
+		complete(&priv->wait_in_report);
+		break;
+	case HEXLIN_GET_VERSION:
+		if (sz != sizeof(*vr))
+			return -EREMOTEIO;
+		vr = (struct hexlin_val8_req *) data;
+		priv->fw_version = vr->v;
+		complete(&priv->wait_in_report);
+		break;
+	case HEXLIN_GET_RESPONDER_ANSWER_ID:
+		if (sz != sizeof(*rar))
+			return -EREMOTEIO;
+		rar = (struct hexlin_responder_answer_req *) data;
+		memcpy(&priv->answ, &rar->answ, sizeof(priv->answ));
+		complete(&priv->wait_in_report);
+		break;
+	case HEXLIN_GET_BAUDRATE:
+		if (sz != sizeof(*br))
+			return -EREMOTEIO;
+		br = (struct hexlin_baudrate_req *) data;
+		le16_to_cpus(br->baudrate);
+		priv->baudrate = br->baudrate;
+		complete(&priv->wait_in_report);
+		break;
+	/* following cases not initiated by us, so no complete() */
+	case HEXLIN_FRAME:
+		if (sz != sizeof(*hfr)) {
+			hid_err_once(hdev, "frame size mismatch: %i\n", sz);
+			return -EREMOTEIO;
+		}
+		hfr = (struct hexlin_unconditional_req *) data;
+		le32_to_cpus(hfr->frm.flags);
+		hexlin_queue_frames_insert(priv, &hfr->frm);
+		break;
+	case HEXLIN_ERROR:
+		hid_err(hdev, "error from adapter\n");
+		break;
+	default:
+		hid_err(hdev, "unknown event: 0x%02x\n", data[0]);
+	}
+
+	return 0;
+}
+
+static int init_hw(struct hexlin_priv_data *priv)
+{
+	int ret;
+
+	ret = hexlin_reset_dev(priv);
+	if (ret) {
+		/* if first reset fails, try one more time */
+		ret = hexlin_reset_dev(priv);
+		if (ret)
+			return ret;
+	}
+
+	ret = hexlin_get_version(priv);
+	if (ret)
+		return ret;
+
+	priv->baudrate = LIN_DEFAULT_BAUDRATE;
+	ret = hexlin_set_baudrate(priv, priv->baudrate);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int hexlin_probe(struct hid_device *hdev,
+			const struct hid_device_id *id)
+{
+	struct hexlin_priv_data *priv;
+	int ret;
+
+	priv = devm_kzalloc(&hdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->hid_dev = hdev;
+	hid_set_drvdata(hdev, priv);
+
+	mutex_init(&priv->tx_lock);
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		hid_err(hdev, "hid parse failed with %d\n", ret);
+		goto fail_and_free;
+	}
+
+	ret = hid_hw_start(hdev, HID_CONNECT_DRIVER);
+	if (ret) {
+		hid_err(hdev, "hid hw start failed with %d\n", ret);
+		goto fail_and_stop;
+	}
+
+	ret = hid_hw_open(hdev);
+	if (ret) {
+		hid_err(hdev, "hid hw open failed with %d\n", ret);
+		goto fail_and_close;
+	}
+
+	init_completion(&priv->wait_in_report);
+
+	hid_device_io_start(hdev);
+
+	ret = init_hw(priv);
+	if (ret)
+		goto fail_and_close;
+
+	priv->ldev = register_lin(&hdev->dev, &hexlin_ldo);
+	if (IS_ERR(priv->ldev)) {
+		ret = PTR_ERR(priv->ldev);
+		goto fail_and_close;
+	}
+
+	hid_hw_close(hdev);
+
+	hid_info(hdev, "hexLIN (fw-version: %u) probed\n", priv->fw_version);
+
+	return 0;
+
+fail_and_close:
+	hid_hw_close(hdev);
+fail_and_stop:
+	hid_hw_stop(hdev);
+fail_and_free:
+	mutex_destroy(&priv->tx_lock);
+	return ret;
+}
+
+static void hexlin_remove(struct hid_device *hdev)
+{
+	struct hexlin_priv_data *priv = hid_get_drvdata(hdev);
+
+	unregister_lin(priv->ldev);
+	hid_hw_stop(hdev);
+}
+
+static const struct hid_device_id hexlin_table[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_MCS, USB_DEVICE_ID_MCS_HEXDEV_HEXLIN) },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(hid, hexlin_table);
+
+static struct hid_driver hexlin_driver = {
+	.name = "hexLIN",
+	.id_table = hexlin_table,
+	.probe = hexlin_probe,
+	.remove = hexlin_remove,
+	.raw_event = hexlin_raw_event,
+};
+
+module_hid_driver(hexlin_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Christoph Fritz <christoph.fritz@hexdev.de>");
+MODULE_DESCRIPTION("LIN bus driver for hexLIN USB adapter");
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 61d2a21affa26..c6fe6f99a0e80 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -907,6 +907,7 @@
 
 #define USB_VENDOR_ID_MCS		0x16d0
 #define USB_DEVICE_ID_MCS_GAMEPADBLOCK	0x0bcc
+#define USB_DEVICE_ID_MCS_HEXDEV_HEXLIN	0x0648
 
 #define USB_VENDOR_MEGAWORLD		0x07b5
 #define USB_DEVICE_ID_MEGAWORLD_GAMEPAD	0x0312
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index e0bbf0c6345d6..d721110d0889b 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -436,6 +436,9 @@ static const struct hid_device_id hid_have_special_driver[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
 #endif
+#if IS_ENABLED(CONFIG_HID_MCS_HEXDEV)
+	{ HID_USB_DEVICE(USB_VENDOR_ID_MCS, USB_DEVICE_ID_MCS_HEXDEV_HEXLIN) },
+#endif
 #if IS_ENABLED(CONFIG_HID_HOLTEK)
 	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD) },
-- 
2.39.2