From owner-freebsd-arm@freebsd.org  Mon Aug  6 22:28:52 2018
Return-Path: <owner-freebsd-arm@freebsd.org>
Delivered-To: freebsd-arm@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id E6DAE1067EB0
 for <freebsd-arm@mailman.ysv.freebsd.org>;
 Mon,  6 Aug 2018 22:28:51 +0000 (UTC)
 (envelope-from warlock@phouka1.phouka.net)
Received: from phouka1.phouka.net (phouka1.phouka.net [107.170.196.116])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "phouka.net",
 Issuer "Go Daddy Secure Certificate Authority - G2" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 5A3358E802
 for <freebsd-arm@freebsd.org>; Mon,  6 Aug 2018 22:28:51 +0000 (UTC)
 (envelope-from warlock@phouka1.phouka.net)
Received: from phouka1.phouka.net (localhost [127.0.0.1])
 by phouka1.phouka.net (8.15.2/8.15.2) with ESMTPS id w76MRYUX096441
 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO);
 Mon, 6 Aug 2018 15:27:34 -0700 (PDT)
 (envelope-from warlock@phouka1.phouka.net)
Received: (from warlock@localhost)
 by phouka1.phouka.net (8.15.2/8.15.2/Submit) id w76MRYNK096440;
 Mon, 6 Aug 2018 15:27:34 -0700 (PDT) (envelope-from warlock)
Date: Mon, 6 Aug 2018 15:27:34 -0700
From: John Kennedy <warlock@phouka.net>
To: bob prohaska <fbsd@www.zefox.net>
Cc: freebsd-arm@freebsd.org
Subject: Re: usb-only rpi 3b+ (+UART foo)
Message-ID: <20180806222734.GH30738@phouka1.phouka.net>
References: <20180806042122.GD30738@phouka1.phouka.net>
 <20180806044929.GA17044@www.zefox.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20180806044929.GA17044@www.zefox.net>
User-Agent: Mutt/1.10.1 (2018-07-13)
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.27
Precedence: list
List-Id: "Porting FreeBSD to ARM processors." <freebsd-arm.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arm/>
List-Post: <mailto:freebsd-arm@freebsd.org>
List-Help: <mailto:freebsd-arm-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 06 Aug 2018 22:28:52 -0000

On Sun, Aug 05, 2018 at 09:49:29PM -0700, bob prohaska wrote:
> My information is now very old, but I _thought_ one had to have u-boot on the
> SD card at a minimum. There was an option within u-boot to "boot usb" which 
> implied the boot process could be transferred to a USB device, but I think
> an SD card is required to get things started.

The RPI3B+ will boot into USB (without SD card), or at least it will using the
same SD card plugged into a Dynex DX-CR112 memory card reader.  That gets you
past the rainbow screen and into U-Boot land.  U-Boot (?) seems to be choking
at that point.

It goes through the partitions (setting currdev to disk0p#), but it is printing
efipart_readwrite messages (rw=1, blk=2591 size=272 status=7).  Varies by
partition, but rw=1 and status=7 for them and long delays.  Putting the same
SD card into the SD slot and it boots up fine.

As far as booting...

	https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/host.md

I want to say that is a fairly recent change, ~April 2018.

Hmm.  My Samsung disk is USB3.