sd: Add common SD initialization code

All SD cards require SD CMD0 (reset) and CMD8 (send IF cond) at boot.
Add this portion of the initialization flow to SD subsystem, as well as
query command to check if card is SDIO.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

CODEOWNERS

@@ -770,6 +770,7 @@ scripts/gen_image_info.py                 @tejlmand
 /subsys/shell/backends/shell_mqtt.c       @ycsin
 /subsys/stats/                            @nvlsianpu
 /subsys/storage/                          @nvlsianpu
+/subsys/sd/                               @danieldegrasse
 /subsys/task_wdt/                         @martinjaeger
 /subsys/testsuite/                        @nashif
 /subsys/testsuite/ztest/*/ztress*         @nordic-krch

subsys/CMakeLists.txt

@@ -30,3 +30,4 @@ add_subdirectory(canbus)
 add_subdirectory_ifdef(CONFIG_TIMING_FUNCTIONS     timing)
 add_subdirectory_ifdef(CONFIG_DEMAND_PAGING        demand_paging)
 add_subdirectory(modbus)
+add_subdirectory(sd)

subsys/Kconfig

@@ -48,6 +48,8 @@ source "subsys/stats/Kconfig"
 
 source "subsys/usb/device/Kconfig"
 
+source "subsys/sd/Kconfig"
+
 source "subsys/dfu/Kconfig"
 
 source "subsys/random/Kconfig"

subsys/sd/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+
+if (CONFIG_SD_STACK)
+  zephyr_interface_library_named(SD)
+
+  zephyr_library()
+  zephyr_library_sources (sd.c)
+endif()

subsys/sd/Kconfig

@@ -0,0 +1,70 @@
+# Copyright (c) 2022 NXP
+# SPDX-License-Identifier: Apache-2.0
+
+# SD stack configuration options
+
+menuconfig SD_STACK
+	bool "SD Card Support"
+	select SDHC
+	help
+	  Enable SD card support
+
+if SD_STACK
+
+module = SD
+module-str = SD stack
+source "subsys/logging/Kconfig.template.log_config"
+
+config SD_INIT_TIMEOUT
+	int "Timeout while initializing SD card"
+	default 1500
+	help
+	  Maximum time to wait, in milliseconds, for the SD card to initialize.
+
+config SD_RETRY_COUNT
+	int "Number of times to retry initialization commands"
+	default 10
+	help
+	  Number of times to retry initialization commands in case of failure
+
+config SD_OCR_RETRY_COUNT
+	int "Number of times to retry SD OCR read"
+	default 1000
+	help
+	  Number of times to retry SD OCR read command. OCR reads typically
+	  require more retries than general SD commands
+
+config SD_CMD_TIMEOUT
+	int "Timeout for SD commands (in ms)"
+	default 200
+	help
+	  Default timeout in milliseconds for SD commands
+
+config SD_DATA_TIMEOUT
+	int "Timeout for SD data transfer (in ms)"
+	default 10000
+	help
+	  Default timeout in milliseconds for SD data transfer commands
+
+config SD_BUFFER_SIZE
+	int
+	default 512
+	help
+	  Size in bytes of internal buffer SD card uses for unaligned reads and
+	  internal data reads during initialization
+
+config SD_DATA_RETRIES
+	int "Number of times to retry sending data to card"
+	default 3
+	help
+	  Number of times to retry sending data to SD card in case of failure
+
+
+config SD_UHS_PROTOCOL
+	bool "Ultra high speed SD card protocol support"
+	default y if SDHC_SUPPORTS_UHS
+	help
+	  Enable support for ultra high speed SD cards. This can be disabled to
+	  reduce code size, at the cost of data transfer speeds.
+
+endif # SD_STACK