Add MFRC522 RFID ISO14443 and Mifare transceiver driver

drivers/wireless/Kconfig

@@ -73,6 +73,37 @@ config WL_NRF24L01_RXFIFO_LEN
 endif # WL_NRF24L01_RXSUPPORT
 endif # WL_NRF24L01
 
+config WL_MFRC522
+	bool "NXP MFRC522 ISO14443/Mifare Transceiver"
+	default n
+	select SPI
+	---help---
+		This options adds driver support for the MFRC522 ISO14443/Mifare chip.
+
+if WL_MFRC522
+
+config MFRC522_SPI_FREQ
+	int "SPI frequency for MFRC522"
+	default 1000000
+	depends on WL_MFRC522
+
+config MFRC522_DEBUG
+	bool "Enable MFRC522 debug"
+	default n
+	depends on WL_MFRC522
+
+config MFRC522_DEBUG_TX
+	bool "trace TX frames"
+	default n
+	depends on MFRC522_DEBUG
+
+config MFRC522_DEBUG_RX
+	bool "trace RX frames"
+	default n
+	depends on MFRC522_DEBUG
+
+endif # WL_MFRC522
+
 config WL_PN532
 	bool "pn532 NFC-chip support"
 	default n

drivers/wireless/Make.defs

@@ -55,6 +55,10 @@ ifeq ($(CONFIG_WL_CC3000),y)
 include wireless$(DELIM)cc3000$(DELIM)Make.defs
 endif
 
+ifeq ($(CONFIG_WL_MFRC522),y)
+CSRCS += mfrc522.c
+endif
+
 ifeq ($(CONFIG_WL_PN532),y)
 CSRCS += pn532.c
 endif

include/nuttx/wireless/mfrc522.h

+/****************************************************************************
+ * include/wireless/mfrc522.h
+ *
+ *   Copyright(C) 2016 Uniquix Ltda. All rights reserved.
+ *   Author: Alan Carvalho de Assis <acassis@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __NUTTX_WIRELESS_MFRC522_H
+#define __NUTTX_WIRELESS_MFRC522_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/spi/spi.h>
+#include <nuttx/irq.h>
+#include <sys/ioctl.h>
+#include <nuttx/wireless/wireless.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+#define MFRC522_MIFARE_ISO14443A          (0x00)
+
+/* IOCTL Commands ***********************************************************/
+
+#define MFRC522IOC_GET_PICC_UID           _WLIOC_USER(0x0001)
+#define MFRC522IOC_GET_STATE              _WLIOC_USER(0x0002)
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+enum mfrc522_state_E
+{
+  MFRC522_STATE_NOT_INIT,
+  MFRC522_STATE_IDLE,
+  MFRC522_STATE_CMD_SENT,
+  MFRC522_STATE_DATA_READY,
+};
+
+struct mfrc522_dev_s;
+
+struct picc_uid_s
+{
+  uint8_t  size;         /* Number of bytes in the UID. 4, 7 or 10 */
+  uint8_t  uid_data[10];
+  uint8_t  sak;          /* The SAK (Select Acknowledge) return by the PICC */
+};
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Name: mfrc522_register
+ *
+ * Description:
+ *   Register the MFRC522 character device as 'devpath'
+ *
+ * Input Parameters:
+ *   devpath - The full path to the driver to register. E.g., "/dev/rfid0"
+ *   spi     - An instance of the SPI interface to use to communicate with MFRC522
+ *   config  - Device persistent board data
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int mfrc522_register(FAR const char *devpath, FAR struct spi_dev_s *spi);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __NUTTX_WIRELESS_MFRC522_H */