Date: Mon, 20 Jan 2020 06:37:26 +1100 From: Peter Jeremy <peter@rulingia.com> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: freebsd-arm@freebsd.org Subject: Re: SATA on BananaPi M1 Message-ID: <20200119193726.GA97848@server.rulingia.com> In-Reply-To: <20200118231701.GA65624@server.rulingia.com> References: <20200117104142.GM25924@server.rulingia.com> <20200118174144.ad45c9296f7bab8f70f35131@bidouilliste.com> <20200118231701.GA65624@server.rulingia.com>
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On 2020-Jan-19 10:17:01 +1100, Peter Jeremy <peter@rulingia.com> wrote:
>On 2020-Jan-18 17:41:44 +0100, Emmanuel Vadot <manu@bidouilliste.com> wrot=
e:
>> I've just test SATA on my A20-Olinuxino and it works if I first tell
>>u-boot to detect drives ("scsi scan"). I have the same behavior as you
>>if I don't.
>..
>> Could you test if you have the same behavior ?
>
>Yes. If I run "scsi scan" then both u-boot and FreeBSD correctly see
>the disk. Thanks for that suggestion. This suggests that
>ahci_a10_phy_reset() is missing some magic bits but it also suggests
>where to look for them.
I had a look at the u-boot-2019.10 sources (this isn't the same as the
"U-Boot 2019.07 (Nov 01 2019 - 01:59:08 +0000) Allwinner Technology"
I have on my BPi but I hoped they'd be close enough). The PHY reset/
init code is functionally the same as FreeBSD apart from a few DELAY()
values. I tried extending the FreeBSD delays to be the same as those
in the U-Boot sources and FreeBSD still failed to see my disk.
On the positive side, once a "scsi scan" has seen a disk, I can
power cycle the disk and the FreeBSD detach/attach code will correctly
recognize that the disk has gone away or returned.
--=20
Peter Jeremy
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