Add ATSAMA5D2/D4 Secure Fuse Controller (SFC) driver

arch/arm/src/sama5/Kconfig

@@ -814,6 +814,7 @@ config SAMA5_ARM
 config SAMA5_FUSE
 	bool "Fuse Controller (FUSE)"
 	default n
+	depends on SAMA5_HAVE_FUSE
 
 config SAMA5_MPDDRC
 	bool "MPDDR controller (MPDDRC)"

arch/arm/src/sama5/Make.defs

@@ -221,6 +221,10 @@ CHIP_CSRCS += sam_tickless.c
 endif
 endif
 
+ifeq ($(CONFIG_SAMA5_SFC), y)
+CHIP_CSRCS += sam_sfc.c
+endif
+
 ifeq ($(CONFIG_SAMA5_EBICS0_NAND),y)
 CHIP_CSRCS += sam_nand.c sam_pmecc.c sam_gf512.c sam_gf1024.c
 else

arch/arm/src/sama5/hardware/sam_sfc.h

@@ -0,0 +1,67 @@
+/****************************************************************************
+ * arch/arm/src/sama5/hardware/sam_sfc.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 __ARCH_ARM_SRC_SAMA5_HARDWARE_SAM_SFC_H
+#define __ARCH_ARM_SRC_SAMA5_HARDWARE_SAM_SFC_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include "hardware/sam_memorymap.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#if defined(ATSAMA5D2) || defined(ATSAMA5D4)
+
+/* SFC Register Offsets *****************************************************/
+
+#define SAM_SFC_KR_OFFSET           (0x0000) /* Key register                */
+#define SAM_SFC_MR_OFFSET           (0x0004) /* Mode register               */
+                                             /* 0x008-0x00c reserved        */
+#define SAM_SFC_IER_OFFSET          (0x0010) /* Interrupt enable register   */
+#define SAM_SFC_IDR_OFFSET          (0x0014) /* Interrupr disable register  */
+#define SAM_SFC_IMR_OFFSET          (0x0018) /* Interrupt mask register     */
+#define SAM_SFC_SR_OFFSET           (0x001c) /* Status register             */
+#define SAM_SFC_DR_OFFSET(n)        ((0x0020)+((n) << (2)))
+#define SAM_SFC_SR_PGMC_SHIFT       (0)
+#define SAM_SFC_SR_PGMC             ((1) << SAM_SFC_SR_PGMC_SHIFT)
+                                             /* Programming completed       */
+#define SAM_SFC_SR_PGMF_SHIFT       (1)
+#define SAM_SFC_SR_PGMF             ((1) << SAM_SFC_SR_PGMF_SHIFT)
+                                             /* Programming failed          */
+
+#define SAM_SFC_KR                  (SAM_SFC_VBASE + SAM_SFC_KR_OFFSET)
+#define SAM_SFC_MR                  (SAM_SFC_VBASE + SAM_SFC_MR_OFFSET)
+#define SAM_SFC_MR_MASK             (1)
+#define SAM_SFC_IER                 (SAM_SFC_VBASE + SAM_SFC_IER_OFFSET)
+#define SAM_SFC_IDR                 (SAM_SFC_VBASE + SAM_SFC_IDR_OFFSET)
+#define SAM_SFC_IMR                 (SAM_SFC_VBASE + SAM_SFC_IMR_OFFSET)
+#define SAM_SFC_SR                  (SAM_SFC_VBASE + SAM_SFC_SR_OFFSET)
+
+#define SAM_SFC_DR(n)               (SAM_SFC_VBASE + SAM_SFC_DR_OFFSET(n))
+
+#define SAM_SFC_KEYCODE             (0x00fb) /* Keycode to allow write      */
+
+#endif /* if defined(ATSAMA5D2) || defined(ATSAMA5D4) */
+#endif /* __ARCH_ARM_SRC_SAMA5_HARDWARE_SAM_SFC_H */

arch/arm/src/sama5/sam_sfc.h

@@ -0,0 +1,75 @@
+/****************************************************************************
+ * arch/arm/src/sama5/sam_sfc.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 __ARCH_ARM_SRC_SAMA5_SAM_SFC_H
+#define __ARCH_ARM_SRC_SAMA5_SAM_SFC_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "chip.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+int sama5_sfc_initialize(const char *devpath);
+void sama5_sfc_unregister(void *handle);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_ARM_SRC_SAMA5_SAM_SFC_H */

drivers/efuse/efuse.c

@@ -170,8 +170,8 @@ static int efuse_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
     case EFUSEIOC_READ_FIELD:
       {
-        FAR struct efuse_param *param =
+        FAR struct efuse_param_s *param =
-                   (FAR struct efuse_param *)((uintptr_t)arg);
+                   (FAR struct efuse_param_s *)((uintptr_t)arg);
 
         /* Read the efuse */
 
@@ -200,8 +200,8 @@ static int efuse_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
     case EFUSEIOC_WRITE_FIELD:
       {
-        FAR struct efuse_param *param =
+        FAR struct efuse_param_s *param =
-                   (FAR struct efuse_param *)((uintptr_t)arg);
+                   (FAR struct efuse_param_s *)((uintptr_t)arg);
 
         /* Write the efuse */
 

include/nuttx/efuse/efuse.h

@@ -57,6 +57,15 @@
 
 #define EFUSEIOC_WRITE_FIELD     _EFUSEIOC(0x0002)
 
+/* Command:     EFUSEIOC_MASK
+ * Description: Masks fuse registers to prevent them from being read.
+ *              Used by ATSAMA5D2 and ATSAMA5D4.
+ * Arguments:   None
+ * Return:      Zero (OK) for success.
+ */
+
+#define EFUSEIOC_MASK            _EFUSEIOC(0x0003)
+
 /****************************************************************************
  * Public Types
  ****************************************************************************/
@@ -95,10 +104,10 @@ typedef struct efuse_desc_s efuse_desc_t;
  *              on.
  */
 
-struct efuse_param
+struct efuse_param_s
 {
   FAR const efuse_desc_t **field;
-  size_t  size;
+  size_t size;
   FAR uint8_t *data;
 };
 

include/nuttx/efuse/sama5_sfc_fuses.h

@@ -0,0 +1,247 @@
+/****************************************************************************
+ * include/nuttx/efuse/sama5_sfc_fuses.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_EFUSE_SAMA5_FUSES_H
+#define __INCLUDE_NUTTX_EFUSE_SAMA5_FUSES_H
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#if defined(ATSAMA5D2)
+#define SAM_SFC_EFUSE_MAX_LEN  544    /* Max length of sfc area. */
+#elif defined ATSAMA5D4
+#define SAM_SFC_EFUSE_MAX_LEN  512    /* Max length of sfc area. */
+#endif
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Type Definitions
+ ****************************************************************************/
+
+#if defined(CONFIG_EFUSE) && defined(CONFIG_SAMA5_SFC)
+
+/* enum of SFC blocks for SAMA5 */
+
+enum
+{
+  SFC_DR0 = 0,
+  SFC_DR1,
+  SFC_DR2,
+  SFC_DR3,
+  SFC_DR4,
+  SFC_DR5,
+  SFC_DR6,
+  SFC_DR7,
+  SFC_DR8,
+  SFC_DR9,
+  SFC_DR10,
+  SFC_DR11,
+  SFC_DR12,
+  SFC_DR13,
+  SFC_DR14,
+#ifdef ATSAMA5D2
+  SFC_DR15,
+  SFC_BOOT,
+  SFC_JTAG,
+  SFC_SEC_BOOT,
+#else
+  SFC_S,
+  SFC_MD,
+  SFC_SECURE_DEBUG,
+  SFC_JTAG_DIS,
+#endif
+  SFC_DR_END,
+};
+
+/* Generic descriptions for the SAM SFC fuses, 32 bits wide.
+ * These can be replaced by user definitions in board code if required.
+ */
+
+static const efuse_desc_t SAMA5_SFC_DATA0[] =
+{
+  {
+    0, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA1[] =
+{
+  {
+    32, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA2[] =
+{
+  {
+    64, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA3[] =
+{
+  {
+    96, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA4[] =
+{
+  {
+    128, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA5[] =
+{
+  {
+    160, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA6[] =
+{
+  {
+    192, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA7[] =
+{
+  {
+    224, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA8[] =
+{
+  {
+    256, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA9[] =
+{
+  {
+    288, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA10[] =
+{
+  {
+    320, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA11[] =
+{
+  {
+    352, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA12[] =
+{
+  {
+    384, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA13[] =
+{
+  {
+    416, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_DATA14[] =
+{
+  {
+    448, 32
+  },
+};
+ #ifdef ATSAMA5D2
+static const efuse_desc_t SAMA5_SFC_DATA15[] =
+{
+  {
+    480, 32
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_BOOT_CFG[] =
+{
+  {
+    512, 30
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_JTAG_DIS[] =
+{
+  {
+    542, 1
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_SECURE_DEBUG[] =
+{
+  {
+    543, 1
+  },
+};
+
+#else
+
+static const efuse_desc_t SAMA5_SFC_S[] =
+{
+  {
+    480, 1
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_MD[] =
+{
+  {
+    482, 1
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_SECURE_DEBUG[] =
+{
+  {
+    510, 1
+  },
+};
+
+static const efuse_desc_t SAMA5_SFC_JTAG_DIS[] =
+{
+  {
+    511, 1
+  },
+};
+
+#endif
+
+#endif /* defined(CONFIG_EFUSE) && defined(CONFIG_SAMA5_SFC) */
+#endif /* __INCLUDE_NUTTX_EFUSE_SAMA5_FUSES_H */