Adding block storage emulation for NVM XIP flash devices.
Some paltforms such as Corstone-1000 need to see NVM XIP raw flash as a block storage device with read only capability.
Here NVM flash devices are devices with addressable memory (e.g: QSPI NOR flash).
The NVM XIP block storage emulation provides the following features:
- Emulate NVM XIP raw flash as a block storage device with read only capability - Being generic by design and can be used by any platform - Device tree node - Platforms can use multiple NVM XIP devices at the same time by defining a DT node for each one of them - A generic NVMXIP block driver allowing to read from the XIP flash - A generic NVMXIP Uclass driver for binding the block device - A generic NVMXIP QSPI driver - Implemented on top of memory-mapped IO (using readq macro) - Enabling NVMXIP in sandbox64 - A sandbox test case - Enabling NVMXIP in Corstone1000 platform as a use case
For more details please refer to the readme [A].
Changelog of the major changes: ===========================
v2:
* move the drivers under drivers/mtd * shorten the block device name * rename nvmxip_init() to nvmxip_post_bind(), call it from the uclass when a new device is bound * use uclass_id_count() in place of nvmxip_bdev_max_devs * moving the NVMXIP QSPI driver to a seperate commit * address nits
v1: [1]
* introduce the new feature
Cheers, Abdellatif
List of previous patches:
[1]: https://lore.kernel.org/all/20230116172832.1946-1-abdellatif.elkhlifi@arm.co...
More details:
[A]: doc/develop/driver-model/nvmxip.rst
Cc: Tom Rini trini@konsulko.com Cc: Simon Glass sjg@chromium.org Cc: Drew Reed Drew.Reed@arm.com Cc: Xueliang Zhong Xueliang.Zhong@arm.com Cc: Rui Miguel Silva rui.silva@linaro.org
Abdellatif El Khlifi (7): drivers/mtd/nvmxip: introduce NVM XIP block storage emulation drivers/mtd/nvmxip: introduce QSPI XIP driver sandbox64: fix: return unsigned long in readq() sandbox64: add support for NVMXIP QSPI corstone1000: add NVM XIP QSPI device tree node corstone1000: enable NVM XIP QSPI flash sandbox64: add a test case for UCLASS_NVMXIP
MAINTAINERS | 8 + arch/arm/dts/corstone1000.dtsi | 9 +- arch/sandbox/cpu/cpu.c | 2 +- arch/sandbox/dts/sandbox64.dts | 13 ++ arch/sandbox/dts/test.dts | 14 ++ arch/sandbox/include/asm/io.h | 2 +- configs/corstone1000_defconfig | 1 + configs/sandbox64_defconfig | 1 + doc/develop/driver-model/index.rst | 1 + doc/develop/driver-model/nvmxip.rst | 91 +++++++++++ .../nvmxip/nvmxip_qspi.txt | 56 +++++++ drivers/block/blk-uclass.c | 1 + drivers/mtd/Kconfig | 2 + drivers/mtd/Makefile | 1 + drivers/mtd/nvmxip/Kconfig | 19 +++ drivers/mtd/nvmxip/Makefile | 8 + drivers/mtd/nvmxip/nvmxip-uclass.c | 74 +++++++++ drivers/mtd/nvmxip/nvmxip.c | 119 ++++++++++++++ drivers/mtd/nvmxip/nvmxip.h | 32 ++++ drivers/mtd/nvmxip/nvmxip_qspi.c | 70 +++++++++ include/dm/uclass-id.h | 1 + test/dm/Makefile | 5 + test/dm/nvmxip.c | 145 ++++++++++++++++++ 23 files changed, 672 insertions(+), 3 deletions(-) create mode 100644 doc/develop/driver-model/nvmxip.rst create mode 100644 doc/device-tree-bindings/nvmxip/nvmxip_qspi.txt create mode 100644 drivers/mtd/nvmxip/Kconfig create mode 100644 drivers/mtd/nvmxip/Makefile create mode 100644 drivers/mtd/nvmxip/nvmxip-uclass.c create mode 100644 drivers/mtd/nvmxip/nvmxip.c create mode 100644 drivers/mtd/nvmxip/nvmxip.h create mode 100644 drivers/mtd/nvmxip/nvmxip_qspi.c create mode 100644 test/dm/nvmxip.c