> Date: Mon, 29 Jan 2024 11:15:58 +0100
> From: Mark Kettenis <mark.kettenis@xs4all.nl>
> 
> > From: James Hastings <moosetek4@gmail.com>
> > Date: Mon, 29 Jan 2024 01:29:46 -0500 (EST)
> > 
> > Add support to com(4) for the UARTs found on MediaTek SoCs.
> > 
> > The "common compatible" on mainstream devicetree is "mediatek,mt6577-uart".
> > This supports most arm64 and armv7 MediaTek SoCs.
> > 
> > Datasheets claim 16550A compatibility so set sc_uarttype accordingly.
> > 
> > Serial output below from Banana Pi BPI-R64 (MT7622).
> > 
> > ok?
> 
> ok kettenis@

BTW, in general, when bringing up a new SoC, I found it useful to get
USB working first, since that gives you both storage and network!

> > Index: dev/fdt/com_fdt.c
> > ===================================================================
> > RCS file: /cvs/src/sys/dev/fdt/com_fdt.c,v
> > retrieving revision 1.8
> > diff -u -p -r1.8 com_fdt.c
> > --- dev/fdt/com_fdt.c	15 Aug 2023 07:56:27 -0000	1.8
> > +++ dev/fdt/com_fdt.c	23 Jan 2024 00:35:15 -0000
> > @@ -55,6 +55,7 @@ com_fdt_init_cons(void)
> >  
> >  	if ((node = fdt_find_cons("brcm,bcm2835-aux-uart")) == NULL &&
> >  	    (node = fdt_find_cons("marvell,armada-38x-uart")) == NULL &&
> > +	    (node = fdt_find_cons("mediatek,mt6577-uart")) == NULL &&
> >  	    (node = fdt_find_cons("ns16550a")) == NULL &&
> >  	    (node = fdt_find_cons("snps,dw-apb-uart")) == NULL &&
> >  	    (node = fdt_find_cons("ti,omap3-uart")) == NULL &&
> > @@ -96,6 +97,7 @@ com_fdt_match(struct device *parent, voi
> >  
> >  	return (OF_is_compatible(faa->fa_node, "brcm,bcm2835-aux-uart") ||
> >  	    OF_is_compatible(faa->fa_node, "marvell,armada-38x-uart") ||
> > +	    OF_is_compatible(faa->fa_node, "mediatek,mt6577-uart") ||
> >  	    OF_is_compatible(faa->fa_node, "ns16550a") ||
> >  	    OF_is_compatible(faa->fa_node, "snps,dw-apb-uart") ||
> >  	    OF_is_compatible(faa->fa_node, "ti,omap3-uart") ||
> > @@ -140,6 +142,9 @@ com_fdt_attach(struct device *parent, st
> >  
> >  	sc->sc_reg_width = OF_getpropint(faa->fa_node, "reg-io-width", width);
> >  	sc->sc_reg_shift = OF_getpropint(faa->fa_node, "reg-shift", shift);
> > +
> > +	if (OF_is_compatible(faa->fa_node, "mediatek,mt6577-uart"))
> > +		sc->sc_uarttype = COM_UART_16550A;
> >  
> >  	if (OF_is_compatible(faa->fa_node, "snps,dw-apb-uart") ||
> >  	    OF_is_compatible(faa->fa_node, "marvell,armada-38x-uart")) {
> > 
> > 
> > 
> > MT7622> dhcp BOOTAA64.EFI
> > MT7622> tftpboot 0x48800000 mt7622-bpi-r64.dtb
> > MT7622> bootefi 0x48000000 0x48800000
> > Booting /BOOTAA64.EFI
> > disks: sd0 sd1
> > >> OpenBSD/arm64 BOOTAA64 1.18
> > boot> bsd
> > booting tftp0a:bsd
> > [ using 2914592 bytes of bsd ELF symbol table ]
> > Copyright (c) 1982, 1986, 1989, 1991, 1993
> > The Regents of the University of California.  All rights reserved.
> > Copyright (c) 1995-2024 OpenBSD. All rights reserved.  https://www.OpenBSD.org
> > 
> > OpenBSD 7.4-current (GENERIC.MP) #11: Sat Jan 20 21:28:19 EST 2024
> >     hastings@arm64.moose-tek.test:/usr/src/sys/arch/arm64/compile/GENERIC.MP
> > real mem  = 1072095232 (1022MB)
> > avail mem = 998666240 (952MB)
> > random: good seed from bootblocks
> > mainbus0 at root: Bananapi BPI-R64
> > psci0 at mainbus0: PSCI 1.1, SMCCC 1.4, SYSTEM_SUSPEND
> > efi0 at mainbus0: UEFI 2.10
> > efi0: Das U-Boot rev 0x20230700
> > smbios0 at efi0: SMBIOS 3.0
> > smbios0: vendor U-Boot version "2023.07.02-OpenWrt-r24627-3eca9ba53f" date 07/01/2023
> > smbios0: Unknown Unknown Product
> > cpu0 at mainbus0 mpidr 0: ARM Cortex-A53 r0p4
> > cpu0: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache
> > cpu0: 256KB 64b/line 16-way L2 cache
> > cpu0: CRC32,SHA2,SHA1,AES+PMULL,ASID16
> > cpu1 at mainbus0 mpidr 1: ARM Cortex-A53 r0p4
> > cpu1: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache
> > cpu1: 256KB 64b/line 16-way L2 cache
> > cpu1: CRC32,SHA2,SHA1,AES+PMULL,ASID16
> > "ramoops" at mainbus0 not configured
> > "secmon" at mainbus0 not configured
> > apm0 at mainbus0
> > syscon0 at mainbus0: "infracfg"
> > syscon1 at mainbus0: "pericfg"
> > syscon2 at mainbus0: "power-controller"
> > syscon3 at mainbus0: "apmixedsys"
> > syscon4 at mainbus0: "topckgen"
> > ampintc0 at mainbus0 nirq 288, ncpu 4 ipi: 0, 1, 2: "interrupt-controller"
> > syscon5 at mainbus0: "clock-controller"
> > syscon6 at mainbus0: "ssusbsys"
> > syscon7 at mainbus0: "pciesys"
> > syscon8 at mainbus0: "pciecfg"
> > syscon9 at mainbus0: "syscon"
> > syscon10 at mainbus0: "syscon"
> > syscon11 at mainbus0: "pcie-mirror"
> > syscon12 at mainbus0: "wed"
> > syscon13 at mainbus0: "wed"
> > syscon14 at mainbus0: "ethernet"
> > syscon15 at mainbus0: "sgmiisys"
> > "opp-table" at mainbus0 not configured
> > "dummy40m" at mainbus0 not configured
> > "oscillator" at mainbus0 not configured
> > "pmu" at mainbus0 not configured
> > agtimer0 at mainbus0: 12500 kHz
> > "pwrap" at mainbus0 not configured
> > "cir" at mainbus0 not configured
> > "interrupt-controller" at mainbus0 not configured
> > "efuse" at mainbus0 not configured
> > "rng" at mainbus0 not configured
> > "pinctrl" at mainbus0 not configured
> > "watchdog" at mainbus0 not configured
> > "rtc" at mainbus0 not configured
> > "cci" at mainbus0 not configured
> > "adc" at mainbus0 not configured
> > com0 at mainbus0: ns16550a, 16 byte fifo
> > com0: console
> > "pwm" at mainbus0 not configured
> > "i2c" at mainbus0 not configured
> > "i2c" at mainbus0 not configured
> > "spi" at mainbus0 not configured
> > "thermal" at mainbus0 not configured
> > "serial" at mainbus0 not configured
> > "spi" at mainbus0 not configured
> > "ecc" at mainbus0 not configured
> > "mmc" at mainbus0 not configured
> > "mmc" at mainbus0 not configured
> > "wmac" at mainbus0 not configured
> > "usb" at mainbus0 not configured
> > "t-phy" at mainbus0 not configured
> > "pcie" at mainbus0 not configured
> > "pcie" at mainbus0 not configured
> > "dma-controller" at mainbus0 not configured
> > gpiokeys0 at mainbus0: "factory", "wps"
> > gpioleds0 at mainbus0: "bpi-r64:pio:green", "bpi-r64:pio:red"
> > "regulator-1p8v" at mainbus0 not configured
> > "regulator-3p3v" at mainbus0 not configured
> > "regulator-5v" at mainbus0 not configured
> > vscsi0 at root
> > scsibus0 at vscsi0: 256 targets
> > softraid0 at root
> > scsibus1 at softraid0: 256 targets
> > root device: 
> > use one of: exit
> > root device: exit
> > syncing disks... done
> > 
> > 
> 
>