From: Quentin Schulz <quentin.schulz@bootlin.com>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: alexandre.belloni@bootlin.com, ralf@linux-mips.org,
paul.burton@mips.com, jhogan@kernel.org, robh+dt@kernel.org,
mark.rutland@arm.com, davem@davemloft.net, andrew@lunn.ch,
allan.nielsen@microchip.com, linux-mips@linux-mips.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, thomas.petazzoni@bootlin.com,
antoine.tenart@bootlin.com
Subject: Re: [PATCH net-next 4/7] net: phy: mscc: add support for VSC8574 PHY
Date: Thu, 4 Oct 2018 11:45:51 +0200 [thread overview]
Message-ID: <20181004094551.wizlpc6udhkqufgo@qschulz> (raw)
In-Reply-To: <bc95fae7-cf2f-5cf1-4e24-59fcc231fd64@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 3004 bytes --]
Hi Florian,
On Fri, Sep 14, 2018 at 01:26:06PM -0700, Florian Fainelli wrote:
> On 09/14/2018 02:44 AM, Quentin Schulz wrote:
> > The VSC8574 PHY is a 4-ports PHY that is 10/100/1000BASE-T, 100BASE-FX,
> > 1000BASE-X and triple-speed copper SFP capable, can communicate with
> > the MAC via SGMII, QSGMII or 1000BASE-X, supports WOL, downshifting and
> > can set the blinking pattern of each of its 4 LEDs, supports SyncE as
> > well as HP Auto-MDIX detection.
> >
> > This adds support for 10/100/1000BASE-T, SGMII/QSGMII link with the MAC,
> > WOL, downshifting, HP Auto-MDIX detection and blinking pattern for its 4
> > LEDs.
> >
> > The VSC8574 has also an internal Intel 8051 microcontroller whose
> > firmware needs to be patched when the PHY is reset. If the 8051's
> > firmware has the expected CRC, its patching can be skipped. The
> > microcontroller can be accessed from any port of the PHY, though the CRC
> > function can only be done through the PHY that is the base PHY of the
> > package (internal address 0) due to a limitation of the firmware.
> >
> > The GPIO register bank is a set of registers that are common to all PHYs
> > in the package. So any modification in any register of this bank affects
> > all PHYs of the package.
> >
> > If the PHYs haven't been reset before booting the Linux kernel and were
> > configured to use interrupts for e.g. link status updates, it is
> > required to clear the interrupts mask register of all PHYs before being
> > able to use interrupts with any PHY. The first PHY of the package that
> > will be init will take care of clearing all PHYs interrupts mask
> > registers. Thus, we need to keep track of the init sequence in the
> > package, if it's already been done or if it's to be done.
> >
> > Most of the init sequence of a PHY of the package is common to all PHYs
> > in the package, thus we use the SMI broadcast feature which enables us
> > to propagate a write in one register of one PHY to all PHYs in the
> > package.
> >
> > Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com>
> > ---
>
> [snip]
>
> > + reg = __mdiobus_read(bus, phy, MSCC_PHY_TEST_PAGE_8);
> > + reg |= 0x8000;
>
> Having a define would be nice here? This looks like a write enable?
>
I had asked for the meaning of this bit in this register before but we
couldn't find documentation for it. I'll ask again and let you know.
> > + __mdiobus_write(bus, phy, MSCC_PHY_TEST_PAGE_8, reg);
> > +
> > + __mdiobus_write(bus, phy, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_TR);
> > +
> > + vsc8584_csr_write(bus, phy, 0x8fae, 0x000401bd);
>
> Just make this an array of address + value pairs and blast it to the
> PHY, having them be inlined here is both error prone and does not scale
> well at all.
Right. Turned out it was a great idea as the below values were
mistakenly adding 0x8000 to the register (which was fine since in
vsc8584_csr_write does a 0x8000 | reg).
Thanks,
Quentin
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2018-10-04 9:46 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-14 9:44 [PATCH net-next 0/7] add support for VSC8584 and VSC8574 Microsemi quad-port PHYs Quentin Schulz
2018-09-14 9:44 ` [PATCH net-next 1/7] dt-bindings: net: vsc8531: add two additional LED modes for VSC8584 Quentin Schulz
2018-09-14 13:11 ` Andrew Lunn
2018-09-15 21:34 ` Florian Fainelli
2018-09-14 9:44 ` [PATCH net-next 2/7] net: phy: mscc: add support for VSC8584 PHY Quentin Schulz
2018-09-14 13:18 ` Andrew Lunn
2018-09-14 13:29 ` Quentin Schulz
2018-09-14 16:28 ` Quentin Schulz
2018-09-14 16:58 ` Andrew Lunn
2018-10-01 9:16 ` Quentin Schulz
2018-09-14 17:27 ` Andrew Lunn
2018-10-01 9:15 ` Quentin Schulz
2018-09-14 9:44 ` [PATCH net-next 3/7] net: phy: mscc: split config_init in two functions for VSC8584 Quentin Schulz
2018-09-14 17:57 ` Florian Fainelli
2018-10-01 9:07 ` Quentin Schulz
2018-09-14 9:44 ` [PATCH net-next 4/7] net: phy: mscc: add support for VSC8574 PHY Quentin Schulz
2018-09-14 20:26 ` Florian Fainelli
2018-10-04 9:45 ` Quentin Schulz [this message]
2018-10-04 12:53 ` Quentin Schulz
2018-09-14 9:44 ` [PATCH 5/7] MIPS: mscc: ocelot: add GPIO4 pinmuxing DT node Quentin Schulz
2018-09-14 14:54 ` Alexandre Belloni
2018-09-14 16:26 ` Quentin Schulz
2018-09-14 17:02 ` Andrew Lunn
2018-10-01 9:01 ` Quentin Schulz
2018-09-14 18:02 ` Alexandre Belloni
2018-10-01 9:02 ` Quentin Schulz
2018-09-14 9:44 ` [PATCH 6/7] MIPS: mscc: add DT for Ocelot PCB120 Quentin Schulz
2018-09-14 14:58 ` Alexandre Belloni
2018-09-14 9:44 ` [PATCH 7/7] MIPS: mscc: add PCB120 to the ocelot fitImage Quentin Schulz
2018-09-14 15:00 ` Alexandre Belloni
2018-09-20 21:38 ` [PATCH net-next 0/7] add support for VSC8584 and VSC8574 Microsemi quad-port PHYs Linus Walleij
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181004094551.wizlpc6udhkqufgo@qschulz \
--to=quentin.schulz@bootlin.com \
--cc=alexandre.belloni@bootlin.com \
--cc=allan.nielsen@microchip.com \
--cc=andrew@lunn.ch \
--cc=antoine.tenart@bootlin.com \
--cc=davem@davemloft.net \
--cc=devicetree@vger.kernel.org \
--cc=f.fainelli@gmail.com \
--cc=jhogan@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@linux-mips.org \
--cc=mark.rutland@arm.com \
--cc=netdev@vger.kernel.org \
--cc=paul.burton@mips.com \
--cc=ralf@linux-mips.org \
--cc=robh+dt@kernel.org \
--cc=thomas.petazzoni@bootlin.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).