arch/xtensa/src/common/espressif: Introduce espnow

Move espnow:
 arch/xtensa/src/esp32 -> arch/xtensa/src/common/espressif

Signed-off-by: Laczen JMS <laczenjms@gmail.com>

arch/xtensa/src/common/espressif/Kconfig

@@ -754,6 +754,46 @@ config ESPRESSIF_WIFI_WLAN_BUFFER_OPTIMIZATION
 
 endmenu # ESPRESSIF_WIFI
 
+config ESPRESSIF_ESPNOW_PKTRADIO
+	bool "ESPNOW pktradio support"
+	depends on ESPRESSIF_WLAN
+	depends on WIRELESS_PKTRADIO
+	default n
+	---help---
+		Enable using espnow for pktradio, the addressing of nodes is
+		based on a PANID and PANADDRESS. Node communication is limited
+		to nodes with the same PANID. There is a direct relation
+		between the PANADDRESS and the ipv6 address of a node:
+		  PANADDRESS: 0xaabb
+		  ipv6 address: AAAA 0000 0000 0000 0000 00ff fe00 bbaa
+		For local link AAAA is fe80.
+
+if ESPRESSIF_ESPNOW_PKTRADIO
+
+config ESPRESSIF_ESPNOW_PKTRADIO_FRAMELEN
+	int "ESPNOW pktradio frame length"
+	range 127 250
+	default 196
+	---help---
+		Frame size used for espnow transmitions. Ensure that this is
+		set equal for all nodes.
+
+config ESPRESSIF_ESPNOW_PKTRADIO_PANID
+	hex "ESPNOW pktradio node panid"
+	range 0x0 0xffff
+	default 0x0
+	---help---
+		PANID for espnow pktradio.
+
+config ESPRESSIF_ESPNOW_PKTRADIO_PANADDR
+       hex "ESPNOW pktradio node address"
+       range 0x0 0xffff
+       default 0xfffe
+       ---help---
+                PANADDRESS for espnow pktradio.
+
+endif #ESPRESSIF_ESPNOW_PKTRADIO
+
 config ESP_PHY_IRQSTATE_FLAGS_NUMBER
 	int "Number of IRQ status lists for PHY initialization"
 	default 3

arch/xtensa/src/common/espressif/Make.defs

@@ -78,6 +78,10 @@ CHIP_CSRCS += esp_wifi_utils.c
 ifeq ($(CONFIG_ESPRESSIF_WLAN),y)
 CHIP_CSRCS += esp_wlan.c
 endif
+ifeq ($(CONFIG_ESPRESSIF_ESPNOW_PKTRADIO), y)
+CHIP_CSRCS += esp_espnow_pktradio.c
+EXTRA_LIBS += -lespnow
+endif
 endif
 
 ifeq ($(CONFIG_ESPRESSIF_WIRELESS),y)

arch/xtensa/src/common/espressif/esp_espnow_pktradio.h

@@ -0,0 +1,77 @@
+/****************************************************************************
+ * arch/xtensa/src/common/espressif/esp_espnow_pktradio.h
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 __ARCH_XTENSA_SRC_COMMON_ESPRESSIF_ESP_ESPNOW_PKTRADIO_H
+#define __ARCH_XTENSA_SRC_COMMON_ESPRESSIF_ESP_ESPNOW_PKTRADIO_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+#ifdef CONFIG_ESPRESSIF_ESPNOW_PKTRADIO
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: pktradio_espnow
+ *
+ * Description:
+ *   Initialize and register the 6LoWPAN over espnow MAC network driver.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   OK on success; Negated errno on failure.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pktradio_espnow(void);
+#endif /* CONFIG_ESPRESSIF_ESPNOW_PKTRADIO */
+
+#ifdef __cplusplus
+}
+#endif
+#undef EXTERN
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_XTENSA_SRC_COMMON_ESPRESSIF_ESP_ESPNOW_PKTRADIO_H */