openblocks_a6_defconfig: improve/fix configuration
The board has an ethernet interface, so enable DHCP for it. The used flash chip uses 16K erase blocks, so use that for JFFS2: mtdinfo -a .. mtd5 Name: user Type: nand Eraseblock size: 16384 bytes, 16.0 KiB Amount of eraseblocks: 1915 (31375360 bytes, 29.9 MiB) Minimum input/output unit size: 512 bytes Sub-page size: 256 bytes OOB size: 16 bytes Character device major/minor: 90:10 Bad blocks are allowed: true Device is writable: true While we're at it, add a readme explaining how to build and upload the build to the board. Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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board/openblocks/a6/readme.txt
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78
board/openblocks/a6/readme.txt
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Openblocks A6
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Intro
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=====
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This default configuration will allow you to start experimenting with the
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buildroot environment for the Openblocks A6. With the current configuration
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it will bring-up the board, and allow access through the serial console.
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How to build it
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===============
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Configure Buildroot:
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$ make openblocks_a6_defconfig
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Compile everything:
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$ make
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Updating board over TFTP
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========================
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Copy the content of output/images to the root of your TFTP server.
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Connect serial and ethernet, power up board and stop it in U-Boot:
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DRAM (DDR2) CAS Latency = 5 tRP = 5 tRAS = 14 tRCD=5
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DRAM CS[0] base 0x00000000 size 512MB
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DRAM Total size 512MB 16bit width
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Addresses 8M - 0M are saved for the U-Boot usage.
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Mem malloc Initialization (8M - 7M): Done
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NAND:64 MB
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POST: mac verify Eth0 PASSED
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CPU : Marvell Feroceon (Rev 1)
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Streaming disabled
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Write allocate disabled
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USB 0: host mode
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Net: egiga0
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Hit any key to stop autoboot: 0
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openblocks>>
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Load kernel from tftp:
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setenv serverip <tftp-server-ip>
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setenv bootfile uImage.kirkwood-openblocks_a6
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bootp && tftp
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Write it to nand:
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nand erase 0x590000 0x1c5c000
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nand write.e $loadaddr 0x590000 0x1c5c000
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Load rootfs from tftp:
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setenv serverip <tftp-server-ip>
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setenv bootfile rootfs.jffs2
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bootp && tftp
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Write it to nand:
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nand erase 0x2214000 0x1dc4000
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nand write.jffs2 $loadaddr 0x2214000 0x1dc4000
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Configure kernel to use rootfs:
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setenv root /dev/mtdblock5 rootfstype=jffs2
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saveenv
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boot
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@ -5,10 +5,11 @@ BR2_arm926t=y
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# system
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BR2_TARGET_GENERIC_HOSTNAME="openblocks-a6"
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BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
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BR2_SYSTEM_DHCP="eth0"
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# filesystem
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BR2_TARGET_ROOTFS_JFFS2=y
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BR2_TARGET_ROOTFS_JFFS2_NANDFLASH_128K=y
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BR2_TARGET_ROOTFS_JFFS2_NANDFLASH_16K=y
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# Linux headers same as kernel, a 4.11 series
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BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_11=y
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