From 5172da6b16ea527dae1d59dbdfa2f5a843389168 Mon Sep 17 00:00:00 2001
From: gaohedong <gaohedong@xiaomi.com>
Date: Sat, 31 Aug 2024 17:39:33 +0800
Subject: [PATCH] socketlin : add lin.h and lin bus-type

Add lin.h adn lin bus-type

Signed-off-by: gaohedong <gaohedong@xiaomi.com>
---
 include/nuttx/lin.h     | 88 +++++++++++++++++++++++++++++++++++++++++
 include/nuttx/net/net.h |  2 +-
 2 files changed, 89 insertions(+), 1 deletion(-)
 create mode 100644 include/nuttx/lin.h

diff --git a/include/nuttx/lin.h b/include/nuttx/lin.h
new file mode 100644
index 0000000000..6b7113b324
--- /dev/null
+++ b/include/nuttx/lin.h
@@ -0,0 +1,88 @@
+/****************************************************************************
+ * include/nuttx/lin.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_LIN_H
+#define __INCLUDE_NUTTX_LIN_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/can.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define LIN_ID_BITS             6
+#define LIN_ID_MASK             ((1 << LIN_ID_BITS) - 1)
+#define LIN_ID_MAX              LIN_ID_MASK
+
+#define LIN_CTRL_FRAME          CAN_EFF_FLAG
+
+/* When slave response to master, slave node should send  frame immediately
+ * which already be cached in last transmission in case of response interval
+ * over time;
+ */
+
+#define LIN_CACHE_RESPONSE      (1 << (LIN_ID_BITS))
+
+/* LIN checksum have two types, default type will be classic checksum */
+
+#define LIN_CHECKSUM_EXTENDED   (1 << (LIN_ID_BITS + 1))
+
+/* Cache LIN frame only work once. then will be clear */
+
+#define LIN_SINGLE_RESPONSE     (1 << (LIN_ID_BITS + 2))
+
+/* Error flags */
+
+#define LIN_ERR_RX_TIMEOUT      (1 << (LIN_ID_BITS + 3))
+#define LIN_ERR_CHECKSUM        (1 << (LIN_ID_BITS + 4))
+#define LIN_ERR_FRAMING         (1 << (LIN_ID_BITS + 5))
+
+/* TxConfirmation flag */
+
+#define LIN_TCF_FRAMING         (1 << (LIN_ID_BITS + 6))
+
+/* Event flag */
+
+#define LIN_EVT_FRAMING         (1 << (LIN_ID_BITS + 7))
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __INCLUDE_NUTTX_LIN_H */
diff --git a/include/nuttx/net/net.h b/include/nuttx/net/net.h
index 14012630a2..5c7daf4a29 100644
--- a/include/nuttx/net/net.h
+++ b/include/nuttx/net/net.h
@@ -111,7 +111,7 @@ enum net_lltype_e
   NET_LL_IEEE802154,   /* IEEE 802.15.4 MAC */
   NET_LL_PKTRADIO,     /* Non-standard packet radio */
   NET_LL_MBIM,         /* CDC-MBIM USB host driver */
-  NET_LL_CAN,          /* CAN bus */
+  NET_LL_CAN,          /* CAN/LIN bus */
   NET_LL_CELL          /* Cellular Virtual Network Device */
 };