Add MTD driver for Winbond W25N series SPI NAND flash.
Currently supports W25N01GV (1Gbit/128MB).
Features:
- Standard SPI interface with configurable frequency (up to 104 MHz)
- Hardware ECC enabled by default
- Block erase with sleep-based wait (releases SPI bus)
- Page read/write with busy-wait for fast operations
Limitations:
- No bad block management (BBM). Factory bad blocks and runtime bad
blocks are not tracked.
- No bad block table (BBT) scanning at initialization.
- No Quad SPI support (standard SPI only).
- No access to spare area (64 bytes/page) or OTP region.
Tested using:
- Board with STM32H743
- W25N01GV on SPI at 96 MHz with DMA enabled
- Flash mounted using littlefs
- Tested using sdbench:
- Sequential write speed of 1760 KB/s
- Sequential read speed of 4900 KB/s
Signed-off-by: Julian Oes <julian@oes.ch>
NVBLK provides a block device that operates on top of a non volatile
memory (as a mtd device) that enables wear levelling for non volatile
memory. It's operation is similar to the dhara wear levelling library,
but nvblk is meant to be used on smaller (nor, mram, rram) memory.
I am also the author and maintainer of the nvblk library.
A block device can be created during startup by using:
```
nvblk_initialize(0, mtd, CONFIG_MTD_NVBLK_DEFAULT_LBS,
CONFIG_MTD_NVBLK_DEFAULT_IOBS,
CONFIG_MTD_NVBLK_DEFAULT_SPEB);
```
and a fat filesystem on top of this as:
```
nsh> mkfatfs /dev/mtdblock0
nsh> mount -t vfat /dev/mtdblock0 /mnt
```
this fat filesystem can then be used:
```
nsh> echo "test" > /mnt/test.txt
nsh> cat test.txt
test
nsh>
```
Signed-off-by: Laczen JMS <laczenjms@gmail.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
- fix memory leak during RAM MTD initialization
- fix calculations for FILE MTD device with customized
block and erase sizes
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
Driver update
* drivers/mtd/Make.defs: Add MTD driver for QuadSPI-based Winbond NOR FLASH
* stm32l4/stm32l4_qspi.c: the "QSPI_DMA_PRIO" has been defined above
Approved-by: Gregory Nutt <gnutt@nuttx.org>
