Technologic Systems TS-4900
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===========================
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This document explains how to set up a basic Buildroot system for the
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Technologic Systems TS-4900 System on Module.
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The TS-4900 is a TS-SOCKET macrocontroller board based on the
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Freescale i.MX6 Single or Quad Core ARM Cortex-A9 CPU clocked at
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1GHz. The TS-4900 features Gigabit Ethernet, SATA II Port, PCI Express
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Bus, high speed USB host and device (OTG), and microSD card.
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More details on the board here:
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http://wiki.embeddedarm.com/wiki/TS-4900
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The TS-4900 is not currently supported by mainline Linux, so a
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Technologic Systems Linux is used based on Linux 4.1.
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The default U-boot configuration flashed scans the SD card to find the
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0x83 partition type, corresponding to the rootfs. Then it will load
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both uImage and dts from the /boot directory.
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To build the default configuration you only have to:
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$ make ts4900_defconfig
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$ make
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The output looks like:
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output/images/
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├── imx6q-ts4900.dtb
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├── rootfs.ext2
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├── rootfs.tar
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├── sdcard.img
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└── uImage
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Since both the uImage and the dts are contained in the /boot
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directory, the provided post-image script generates an image file
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containing only one partition for the rootfs:
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$ fdisk output/images/sdcard.img
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Device Boot Start End Blocks Id System
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output/images/sdcard.img1 1 524288 262144 83 Linux
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This image can be directly written to an SD card.
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$ sudo dd if=output/images/sdcard.img of=/dev/mmcblk0
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In order to test the image on TS-4900 board, a TS baseboard, such as
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the TS-9xxx series, is needed to provide power, console header, RJ45
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connector etc.
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The bootloader comes pre-flashed on the board on an SPI flash. Since
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updating the bootloader is risky and not trivial, it is not included
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in the Buildroot defconfig. Refer to
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http://wiki.embeddedarm.com/wiki/TS-4900#U-Boot for details on which
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U-Boot config to use and how to flash it.
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