Mediatek / Ralink status

[Stanislav Galabov]

Hi all,

Just to let you know, basic support for the following Mediatek/Ralink SoCs (with FDT) should now be in -head [1]: RT3050, RT3052, RT3350, RT3352, RT5350, RT3662, RT3883, RT5350, MT7620 (A and N versions), MT7621, MT7628 and MT7688.

The following are the kernel configurations for the SoCs:
RT3050_FDT -> for RT3050, RT3052 and RT3350 SoCs
RT3352_FDT -> for RT3352 SoC
RT3883_FDT -> for RT3662 and RT3883 SoCs
RT5350_FDT -> for RT5350 SoC
MT7620A_FDT -> for MT7620A SoC
MT7620N_FDT -> for MT7620N SoC
MT7621_FDT -> for MT7621 SoC
MT7628_FDT -> for MT7628 and MT7688 SoCs

The DTS files for the supported SoCs and boards can be found in sys/gnu/dts/mips.

When compiling a kernel for a given board, the following should be taken into account:
1. Which SoC is the target board using.
2. Which DTS file describes the target board.

For example, if we look at the WiTi board, the SoC is MT7621 and the DTS file name is WITI.dts.

So, when building the kernel, we can follow the instructions at [2] (thanks, ray) and just replace the actual build line (the line after "Build mipsel toolchain and then kernel:”) with:
bmake KERNCONF=<kern_name> FDT_DTS_FILE=<dts_name> TARGET=mips TARGET_ARCH=mipsel kernel-toolchain buildkernel
where:
- kern_name is the name of the kernel which supports the target SoC from the above list
- dts_name is the name of the DTS file for the target board as found in sys/gnu/dts/mips.

So, again, for the WiTi board, we’d have:
bmake KERNCONF=MT7621_FDT FDT_DTS_FILE=WITI.dts TARGET=mips TARGET_ARCH=mipsel kernel-toolchain buildkernel

Because this question was raised before, where the wiki page [2] refers to oldlzma or lzma 4.17, I actually have successfully used lzma-4.32.7 from here (built from source) [3].

At the moment the following things are supposed to be supported, depending on whether the target SoC has support for them: interrupt controllers, pinmux, gpio, uart, spi, usb (otg/ehci, ohci/xhci), ethernet, pci.

I would appreciate feedback on all this. I’ve tried to test with most of the SoCs listed above, but I don’t have RT3350 and MT7628 and I fried my last RT3052 in another experiment recently, so I haven’t tested specifically on these. I have, however, tested on RT3050 (supported by the same kernel as the RT3052 and RT3350) and MT7688 (supported by the same kernel as MT7628) and things seem fine on my boards. Who knows, though? I may have missed something..

Best wishes,
Stanislav

[1] - https://svnweb.freebsd.org/changeset/base/298501
[2] - https://wiki.freebsd.org/FreeBSD/mips/RT3052F
[3] - http://tukaani.org/lzma/lzma-4.32.7.tar.gz
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