Hello,
I'm seeing unusual behavior when u-boot attempts to attach an mtd partition to a ubi device using a spi-nor flash (MX25L51245G).
When the mtd partition size is set to less than 15MiB, the attach works, however when the mtd partition size is increased to 16MB or greater, u-boot displays the message"ubi0: attaching mtd1" and hangs indefinately.
I've searched through the u-boot mailing archives but I have yet to find anything that might shed some light on this issue.
Here are the steps to reproduce:
$ git clone https://github.com/linux4sam/u-boot-at91.git -b u-boot-2016.03-at91
$ cd u-boot-at91/
Patch the following config file: include/configs/at91sam9x5ek_spiflash_defconfig
--- include/configs/at91sam9x5ek_spiflash_defconfig 2017-01-19 19:08:50.257475024 -0500 +++ include/configs/at91sam9x5ek_spiflash_defconfig 2017-01-19 19:12:37.045475024 -0500 @@ -1,7 +1,6 @@ CONFIG_ARM=y CONFIG_ARCH_AT91=y CONFIG_TARGET_AT91SAM9X5EK=y -CONFIG_SPL=y CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9X5,SYS_USE_SPIFLASH" CONFIG_SYS_PROMPT="U-Boot> " # CONFIG_CMD_IMI is not set @@ -10,4 +9,7 @@ CONFIG_SYS_PROMPT="U-Boot> " # CONFIG_CMD_FPGA is not set # CONFIG_CMD_SETEXPR is not set CONFIG_SPI_FLASH=y -CONFIG_SPI_FLASH_ATMEL=y +CONFIG_SPI_FLASH_ABOVE_16MB=y +CONFIG_SPI_FLASH_4B_OPCODES=y +CONFIG_SPI_FLASH_MACRONIX=y +CONFIG_SPI_FLASH_MTD=y
$ make at91sam9x5ek_spiflash_defconfig
$ make
Copy u-boot.bin onto the board
1) The following is the case where the rootfs mtd partition attaches successfully and it's value is set to 15MB
U-Boot> setenv mtdparts 'mtdparts=spi32766.0:64k(bootstrap),512k(uboot),15M(rootfs)' U-Boot> setenv mtdids 'nor0=spi32766.0' U-Boot> sf probe 0 U-Boot> ubi part rootfs SF: Detected MX25L51235F with page size 256 Bytes, erase size 64 KiB, total 64 MiB ubi0: attaching mtd1 ubi0: scanning is finished ubi0: attached mtd1 (name "mtd=2", size 15 MiB) ubi0: PEB size: 65536 bytes (64 KiB), LEB size: 65408 bytes ubi0: min./max. I/O unit sizes: 1/256, sub-page size 1 ubi0: VID header offset: 64 (aligned 64), data offset: 128 ubi0: good PEBs: 240, bad PEBs: 0, corrupted PEBs: 0 ubi0: user volume: 0, internal volumes: 1, max. volumes count: 128 ubi0: max/mean erase counter: 2/1, WL threshold: 4096, image sequence number: 943000472 ubi0: available PEBs: 236, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0 U-Boot>
2) The following is the case where the rootfs mtd partition fails to attach. It's size is set to 16MB
U-Boot> setenv mtdparts 'mtdparts=spi32766.0:64k(bootstrap),512k(uboot),16M(rootfs)' U-Boot> setenv mtdids 'nor0=spi32766.0' U-Boot> sf probe 0 U-Boot> ubi part rootfs SF: Detected MX25L51235F with page size 256 Bytes, erase size 64 KiB, total 64 MiB ubi0: attaching mtd1
At this point, u-boot is now hung and the only difference between case 1 and case 2 is the size of the rootfs mtd partition changed from 15MB to 16MB
I would greatly appreciate any ideas. Unfortunately at this point, I'm stuck on this issue.
Thank you,
Davis