crc: initial support for CRC subsystem

Migrate support from crc library to new crc subsystem
Add hardware acclerator backend for crc subsystem

Signed-off-by: Duy Vo <duy.vo.xc@bp.renesas.com>

Author: Duy Vo

MAINTAINERS.yml

@@ -857,6 +857,17 @@ Console:
   tests:
     - sample.console
 
+CRC:
+  status: maintained
+  maintainers:
+    - thenguyenyf
+  files:
+    - include/zephyr/sys/crc.h
+    - subsys/crc/
+    - tests/subsys/crc/
+  labels:
+    - "area: CRC"
+
 Debug:
   status: maintained
   maintainers:
@@ -2605,7 +2616,6 @@ Utilities:
     - dcpleung
     - peter-mitsis
   files:
-    - lib/crc/
     - lib/utils/
     - tests/unit/timeutil/
     - tests/unit/time_units/

lib/CMakeLists.txt

@@ -3,7 +3,6 @@
 # FIXME: SHADOW_VARS: Remove this once we have enabled -Wshadow globally.
 add_compile_options($<TARGET_PROPERTY:compiler,warning_shadow_variables>)
 
-add_subdirectory(crc)
 if(NOT CONFIG_EXTERNAL_LIBC)
 add_subdirectory(libc)
 endif()

lib/Kconfig

@@ -7,8 +7,6 @@ source "lib/libc/Kconfig"
 
 source "lib/cpp/Kconfig"
 
-source "lib/crc/Kconfig"
-
 menu "Additional libraries"
 
 source "lib/hash/Kconfig"

lib/crc/CMakeLists.txt

@@ -38,6 +38,7 @@ add_subdirectory_ifdef(CONFIG_ARM_SIP_SVC_SUBSYS sip_svc)
 add_subdirectory_ifdef(CONFIG_BINDESC bindesc)
 add_subdirectory_ifdef(CONFIG_BT bluetooth)
 add_subdirectory_ifdef(CONFIG_CONSOLE_SUBSYS console)
+add_subdirectory_ifdef(CONFIG_CRC crc)
 add_subdirectory_ifdef(CONFIG_DAP dap)
 add_subdirectory_ifdef(CONFIG_DEMAND_PAGING demand_paging)
 add_subdirectory_ifdef(CONFIG_DISK_ACCESS disk)

lib/crc/Kconfig

@@ -11,6 +11,7 @@ source "subsys/bindesc/Kconfig"
 source "subsys/bluetooth/Kconfig"
 source "subsys/canbus/Kconfig"
 source "subsys/console/Kconfig"
+source "subsys/crc/Kconfig"
 source "subsys/dap/Kconfig"
 source "subsys/debug/Kconfig"
 source "subsys/demand_paging/Kconfig"

subsys/CMakeLists.txt

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources(crc4_sw.c)
+zephyr_library_sources(crc8_sw.c)
+zephyr_library_sources(crc16_sw.c)
+zephyr_library_sources(crc7_sw.c)
+zephyr_library_sources(crc24_sw.c)
+zephyr_library_sources(crc32c_sw.c)
+zephyr_library_sources(crc32_sw.c)
+zephyr_library_sources(crc32k_4_2_sw.c)
+
+zephyr_library_sources_ifdef(CONFIG_CRC_HW_HANDLER crc_hardware.c)
+zephyr_library_sources_ifdef(CONFIG_CRC_SHELL crc_shell.c)

subsys/Kconfig

@@ -0,0 +1,163 @@
+# Copyright (c) 2016,2023 Intel Corporation
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+DT_CHOSEN_Z_CRC := zephyr,crc
+
+menuconfig CRC
+	bool "Cyclic redundancy check (CRC) Support"
+	help
+	  Enable use of CRC.
+
+if CRC
+
+module = CRC
+module-str = CRC
+source "subsys/logging/Kconfig.template.log_config"
+
+config CRC_HW_HANDLER
+	bool "CRC Hardware Accelerator"
+	default y if $(dt_chosen_enabled,$(DT_CHOSEN_Z_CRC))
+	select CRC_DRIVER
+	help
+	  Enable use of CRC hardware
+
+config CRC4
+	bool "CRC-4 (Generic)"
+	depends on CRC_DRIVER_HAS_CRC4
+	default y
+	help
+	  Implements a generic CRC-4 algorithm. This is suitable for platforms
+	  without hardware CRC support. Offers flexibility but has lower performance
+	  compared to hardware-based implementations.
+
+config CRC4_TI
+	bool "CRC-4 (TI Polynomial)"
+	depends on CRC_DRIVER_HAS_CRC4_TI
+	default y
+	help
+	  Implements the TI-specific CRC-4 algorithm. Commonly used in low-level
+	  embedded communication where minimal CRC overhead is needed.
+
+config CRC7_BE
+	bool "CRC-7 (Big Endian)"
+	depends on CRC_DRIVER_HAS_CRC7_BE
+	default y
+	help
+	  Implements a CRC-7 algorithm with Big Endian bit order. Often used
+	  in SD card protocols and other serial communication standards.
+
+config CRC8
+	bool "CRC-8 (Generic)"
+	depends on CRC_DRIVER_HAS_CRC8
+	default y
+	help
+	  Implements a generic CRC-8 algorithm. Useful for small data integrity
+	  checks such as checksums and simple communication protocols.
+
+config CRC8_ROHC
+	bool "CRC-8 (ROHC)"
+	depends on CRC_DRIVER_HAS_CRC8_ROHC
+	default y
+	help
+	  Implements the CRC-8 ROHC (Robust Header Compression) algorithm,
+	  typically used in compressed IP header protocols and networking.
+
+config CRC8_CCITT
+	bool "CRC-8 (CCITT)"
+	depends on CRC_DRIVER_HAS_CRC8_CCITT
+	default y
+	help
+	  Implements the CRC-8 CCITT polynomial. Commonly used in
+	  telecommunications and low-power sensor protocols.
+
+config CRC16
+	bool "CRC-16 (Generic)"
+	depends on CRC_DRIVER_HAS_CRC16
+	default y
+	help
+	  Implements the generic CRC-16 algorithm. Frequently used in
+	  storage, file transmission, and basic serial communication protocols.
+
+config CRC16_ANSI
+	bool "CRC-16 (ANSI)"
+	depends on CRC_DRIVER_HAS_CRC16_ANSI
+	default y
+	help
+	  Implements the ANSI variant of CRC-16, also known as CRC-16-IBM.
+	  Commonly applied in legacy serial and file systems.
+
+config CRC16_CCITT
+	bool "CRC-16 (CCITT)"
+	depends on CRC_DRIVER_HAS_CRC16_CCITT
+	default y
+	help
+	  Implements the CCITT variant of CRC-16, widely used in
+	  telecommunication systems such as XMODEM and HDLC protocols.
+
+config CRC16_ITU_T
+	bool "CRC-16 (ITU-T)"
+	depends on CRC_DRIVER_HAS_CRC16_ITU_T
+	default y
+	help
+	  Implements the ITU-T (formerly CCITT) CRC-16 variant.
+	  Popular in modem protocols and wireless communication standards.
+
+config CRC16_REFLECT
+	bool "CRC-16 (Reflected)"
+	depends on CRC_DRIVER_HAS_CRC16_REFLECT
+	default y
+	help
+	  Implements the reflected (bit-reversed) variant of CRC-16-CCITT.
+	  Useful in systems that process data in LSB-first order.
+
+config CRC24_PGP
+	bool "CRC-24 (PGP)"
+	depends on CRC_DRIVER_HAS_CRC24_PGP
+	default y
+	help
+	  Implements a CRC24 algorithm, used in applications like Bluetooth
+	  and certain cryptographic protocols.
+
+config CRC32_C
+	bool "CRC-32C"
+	depends on CRC_DRIVER_HAS_CRC32_C
+	default y
+	help
+	  Implements the CRC32-C (Castagnoli) algorithm, optimized for
+	  high-performance applications such as storage, networking,
+	  and error detection in modern processors.
+
+config CRC32_IEEE
+	bool "CRC-32 (IEEE)"
+	depends on CRC_DRIVER_HAS_CRC32_IEEE
+	default y
+	help
+	  Implements the CRC32-IEEE (CRC-32) algorithm, commonly used
+	  in Ethernet, ZIP file integrity checks, and other standard
+	  networking and storage applications.
+
+
+config CRC32_K_4_2
+	bool "CRC-32K/4.2"
+	depends on CRC_DRIVER_HAS_CRC32_K_4_2
+	default y
+	help
+	  Implement the CRC-32K/4.2 algorithm, a variant of the standard
+	  CRC32-IEEE used in Ethernet, ZIP files, and other data integrity
+	  applications.
+
+config CRC32_K_4_2_TABLE_256
+	bool "CRC-32K/4.2 Table 256"
+	help
+	  Enables the software implementation of the CRC-32K/4.2 algorithm
+	  using a 256-entry lookup table for faster computation.
+
+config CRC_SHELL
+	bool "CRC Shell"
+	depends on SHELL
+	select POSIX_C_LIB_EXT
+	help
+	  Enable CRC checking for memory regions from the shell.
+
+endif # CRC

subsys/crc/CMakeLists.txt

@@ -6,7 +6,7 @@
 
 #include <zephyr/sys/crc.h>
 
-uint16_t crc16(uint16_t poly, uint16_t seed, const uint8_t *src, size_t len)
+uint16_t __weak crc16(uint16_t poly, uint16_t seed, const uint8_t *src, size_t len)
 {
 	uint16_t crc = seed;
 	size_t i, j;
@@ -23,11 +23,10 @@ uint16_t crc16(uint16_t poly, uint16_t seed, const uint8_t *src, size_t len)
 		}
 	}
 
-
 	return crc;
 }
 
-uint16_t crc16_reflect(uint16_t poly, uint16_t seed, const uint8_t *src, size_t len)
+uint16_t __weak crc16_reflect(uint16_t poly, uint16_t seed, const uint8_t *src, size_t len)
 {
 	uint16_t crc = seed;
 	size_t i, j;
@@ -44,12 +43,10 @@ uint16_t crc16_reflect(uint16_t poly, uint16_t seed, const uint8_t *src, size_t
 		}
 	}
 
-
 	return crc;
 }
 
-
-uint16_t crc16_ccitt(uint16_t seed, const uint8_t *src, size_t len)
+uint16_t __weak crc16_ccitt(uint16_t seed, const uint8_t *src, size_t len)
 {
 	for (; len > 0; len--) {
 		uint8_t e, f;
@@ -63,7 +60,7 @@ uint16_t crc16_ccitt(uint16_t seed, const uint8_t *src, size_t len)
 	return seed;
 }
 
-uint16_t crc16_itu_t(uint16_t seed, const uint8_t *src, size_t len)
+uint16_t __weak crc16_itu_t(uint16_t seed, const uint8_t *src, size_t len)
 {
 	for (; len > 0; len--) {
 		seed = (seed >> 8U) | (seed << 8U);