PSOC6: add CRC and TRNG APIs

Exclude the labels from inherited FUTURE_SEQUANA targets.

Author: vmedcy

targets/TARGET_Cypress/TARGET_PSOC6/crc_api.c

@@ -0,0 +1,100 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2019 Cypress Semiconductor Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed 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.
+ */
+
+#include "device.h"
+
+#if DEVICE_CRC
+
+#include "mbed_assert.h"
+#include "crc_api.h"
+
+#include "psoc6_utils.h"
+
+#include "cy_crypto_core_crc.h"
+
+static uint32_t crcWidth = 0;
+static uint32_t crcShift = 0;
+static uint32_t crcXorMask;
+
+/* Cypress CRYPTO HW supports ANY CRC algorithms from CRC-3 to CRC-32 */
+bool hal_crc_is_supported(const crc_mbed_config_t *config)
+{
+    return (config != NULL);
+}
+
+void hal_crc_compute_partial_start(const crc_mbed_config_t *config)
+{
+    uint32_t myMask = 0;
+
+    if (!hal_crc_is_supported(config) || (cy_reserve_crypto(CY_CRYPTO_CRC_HW) != 0))
+    {
+        return;
+    }
+
+    crcWidth = config->width;
+
+    crcShift = (uint32_t)(!config->reflect_out) * (crcWidth & 7u);
+    if (crcShift) {
+        crcShift = 8u - crcShift;
+        for (uint32_t i = 0; i < crcShift; i++) {
+            myMask |= 1 << i;
+        }
+        crcXorMask = config->final_xor & myMask;
+    }
+
+    Cy_Crypto_Core_Crc_CalcInit(CRYPTO, config->width,
+                                config->polynomial,
+                                config->reflect_in,
+                                0,
+                                config->reflect_out,
+                                config->final_xor >> crcShift,
+                                config->initial_xor);
+}
+
+void hal_crc_compute_partial(const uint8_t *data, const size_t size)
+{
+    if ((data == NULL) || (size <= 0) || (crcWidth == 0)) {
+        return;
+    }
+
+    Cy_Crypto_Core_Crc_CalcPartial(CRYPTO, data, size);
+}
+
+uint32_t hal_crc_get_result(void)
+{
+    uint32_t result = 0;
+
+    if (crcWidth == 0) {
+        return 0xffffffffu;
+    }
+
+    Cy_Crypto_Core_Crc_CalcFinish(CRYPTO, crcWidth, &result);
+
+    if (crcShift) {
+        result = result << crcShift;
+        result = result ^  crcXorMask;
+    }
+
+    crcWidth = 0;
+
+    cy_free_crypto(CY_CRYPTO_CRC_HW);
+
+    return result;
+}
+
+#endif //DEVICE_CRC
+

targets/TARGET_Cypress/TARGET_PSOC6/trng_api.c

@@ -0,0 +1,73 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2019 Cypress Semiconductor Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed 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.
+ */
+
+/*  Hardware entropy collector for the PSoC6A families */
+
+#if DEVICE_TRNG
+
+#include "trng_api.h"
+#include "psoc6_utils.h"
+#include "cy_crypto_core_trng.h"
+
+/* Initialization polynomial values fro True Random Generator */
+#define GARO31_INITSTATE          (0x04c11db7u)
+#define FIRO31_INITSTATE          (0x04c11db7u)
+
+#define MAX_TRNG_BIT_SIZE         (32UL)
+
+void trng_init(trng_t *obj)
+{
+    (void)obj;
+
+    cy_reserve_crypto(CY_CRYPTO_TRNG_HW);
+}
+
+void trng_free(trng_t *obj)
+{
+    /* Deinitialization is not needed for the driver */
+    (void)obj;
+
+    cy_free_crypto(CY_CRYPTO_TRNG_HW);
+}
+
+int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+{
+    int ret = 0;
+    *output_length = 0;
+
+    /* temporary random data buffer */
+    uint32_t random;
+
+    (void)obj;
+
+    /* Get Random byte */
+    while ((*output_length < length) && (ret == 0)) {
+        if (Cy_Crypto_Core_Trng(CRYPTO, GARO31_INITSTATE, FIRO31_INITSTATE, MAX_TRNG_BIT_SIZE, &random) != CY_CRYPTO_SUCCESS) {
+            ret = -1;
+        } else {
+            for (uint8_t i = 0; (i < 4) && (*output_length < length) ; i++) {
+                *output++ = ((uint8_t *)&random)[i];
+                *output_length += 1;
+            }
+        }
+    }
+    random = 0uL;
+
+    return (ret);
+}
+
+#endif

targets/targets.json

@@ -7824,7 +7824,9 @@
             "STDIO_MESSAGES",
             "LPTICKER",
             "SLEEP",
-            "FLASH"
+            "FLASH",
+            "TRNG",
+            "CRC"
         ],
         "release_versions": ["5"],
         "extra_labels": ["Cypress", "PSOC6"],
@@ -7846,6 +7848,7 @@
         "supported_form_factors": ["ARDUINO"],
         "extra_labels_add": ["PSOC6_FUTURE", "CY8C63XX", "FUTURE_SEQUANA"],
         "extra_labels_remove": ["PSOC6"],
+        "device_has_remove": ["TRNG", "CRC"],
         "macros_add": ["CY8C6347BZI_BLD53"],
         "detect_code": ["6000"],
         "post_binary_hook": {
@@ -7874,6 +7877,7 @@
         "supported_form_factors": ["ARDUINO"],
         "extra_labels_add": ["PSOC6_FUTURE", "CY8C63XX", "CORDIO"],
         "extra_labels_remove": ["PSOC6"],
+        "device_has_remove": ["TRNG", "CRC"],
         "macros_add": ["CY8C6347BZI_BLD53"],
         "detect_code": ["6000"],
         "hex_filename": "psoc63_m0_default_1.02.hex",