From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF560C3A59D for ; Sat, 22 Oct 2022 06:25:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229994AbiJVGZm (ORCPT ); Sat, 22 Oct 2022 02:25:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229980AbiJVGZi (ORCPT ); Sat, 22 Oct 2022 02:25:38 -0400 Received: from mxout1.routing.net (mxout1.routing.net [IPv6:2a03:2900:1:a::a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A4E11905FC; Fri, 21 Oct 2022 23:25:34 -0700 (PDT) Received: from mxbox1.masterlogin.de (unknown [192.168.10.88]) by mxout1.routing.net (Postfix) with ESMTP id 013F441A2A; Sat, 22 Oct 2022 06:25:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailerdienst.de; s=20200217; t=1666419932; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZMqoiUKL2i4Kmd4ZRsFKh8NDUy/+nQ+GenjiN4Z6LvA=; b=PlUurBxGweiNyiYCpxqgtFWbQiYIbqmCRWfy09ocSy5GC/sUpxXW2TMQP8umz1xjm5rCzh VrP8WPiway3wqKDwpITQFytHbY+AYUNBSrgzk0ga8Crg9Fq76HN5cmJWXUduVEiPG2zz/4 YSkvqZk0NmTn7e2tUgOdoGtI8uiVHq0= Received: from [127.0.0.1] (fttx-pool-80.245.73.148.bambit.de [80.245.73.148]) by mxbox1.masterlogin.de (Postfix) with ESMTPSA id E27054030E; Sat, 22 Oct 2022 06:25:30 +0000 (UTC) Date: Sat, 22 Oct 2022 08:25:26 +0200 From: Frank Wunderlich To: "Russell King (Oracle)" , Frank Wunderlich CC: linux-mediatek@lists.infradead.org, Alexander Couzens , Felix Fietkau , John Crispin , Sean Wang , Mark Lee , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Matthias Brugger , netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: Re: Re: [PATCH v2] net: mtk_sgmii: implement mtk_pcs_ops User-Agent: K-9 Mail for Android In-Reply-To: References: <20221020144431.126124-1-linux@fw-web.de> <02A54E45-2084-440A-A643-772C0CC9F988@public-files.de> Message-ID: <9BC397B2-3E0B-4687-99E5-B15472A1762B@fw-web.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mail-ID: 57565e2b-1798-4544-8b83-796b855bbc18 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 21=2E Oktober 2022 23:28:09 MESZ schrieb "Russell King (Oracle)" : >On Fri, Oct 21, 2022 at 09:52:36PM +0200, Frank Wunderlich wrote: >> > Gesendet: Freitag, 21=2E Oktober 2022 um 20:31 Uhr >> > Von: "Russell King (Oracle)" >>=20 >> > On Fri, Oct 21, 2022 at 07:47:47PM +0200, Frank Wunderlich wrote: >> > > > Gesendet: Freitag, 21=2E Oktober 2022 um 11:06 Uhr >> > > > Von: "Russell King (Oracle)" >>=20 >> > > > Looking at SGMSYS_PCS_CONTROL_1, this is actually the standard BM= CR in >> > > > the low 16 bits, and BMSR in the upper 16 bits, so: >> > > > >> > > > At address 4, I'd expect the PHYSID=2E >> > > > At address 8, I'd expect the advertisement register in the low 16= bits >> > > > and the link partner advertisement in the upper 16 bits=2E >> > > > >> > > > Can you try an experiment, and in mtk_sgmii_init() try accessing = the >> > > > regmap at address 0, 4, and 8 and print their contents please? >> > > >> > > is this what you want to see? >>=20 >> > > [ 1=2E083359] dev: 0 offset:0 0x840140 >> > > [ 1=2E083376] dev: 0 offset:4 0x4d544950 >> > > [ 1=2E086955] dev: 0 offset:8 0x1 >> > > [ 1=2E090697] dev: 1 offset:0 0x81140 >> > > [ 1=2E093866] dev: 1 offset:4 0x4d544950 >> > > [ 1=2E097342] dev: 1 offset:8 0x1 >> > >> > Thanks=2E Decoding these=2E=2E=2E >> > >> > dev 0: >> > BMCR: fixed, full duplex, 1000Mbps, !autoneg >> > BMSR: link up >> > Phy ID: 0x4d54 0x4950 >> > Advertise: 0x0001 (which would correspond with the MAC side of SGMII= ) >> > Link partner: 0x0000 (no advertisement received, but we're not using >> > negotiation=2E) >> > >> > dev 1: >> > BMCR: autoneg (full duplex, 1000Mbps - both would be ignored) >> > BMSR: able to do autoneg, no link >> > Phy ID: 0x4d54 0x4950 >> > Advertise: 0x0001 (same as above) >> > Link partner: 0x0000 (no advertisement received due to no link) >> > >> > Okay, what would now be interesting is to see how dev 1 behaves when >> > it has link with a 1000base-X link partner that is advertising >> > properly=2E If this changes to 0x01e0 or similar (in the high 16-bits >> > of offset 8) then we definitely know that this is an IEEE PHY registe= r >> > set laid out in memory, and we can program the advertisement and read >> > the link partner's abilities=2E >>=20 >> added register-read on the the new get_state function too >>=20 >> on bootup it is now a bit different >>=20 >> [ 1=2E086283] dev: 0 offset:0 0x40140 #was previously 0x840140 >> [ 1=2E086301] dev: 0 offset:4 0x4d544950 >> [ 1=2E089795] dev: 0 offset:8 0x1 >> [ 1=2E093584] dev: 1 offset:0 0x81140 >> [ 1=2E096716] dev: 1 offset:4 0x4d544950 >> [ 1=2E100191] dev: 1 offset:8 0x1 >>=20 >> root@bpi-r3:~# ip link set eth1 up >> [ 172=2E037519] mtk_soc_eth 15100000=2Eethernet eth1: configuring for = inband/1000base-x link mode >> root@bpi-r3:~# >> [ 172=2E102949] offset:0 0x40140 #still same value > >If this is "dev: 1" the value has changed - the ANENABLE bit has been >turned off, which means it's not going to bother receiving or sending >the 16-bit control word=2E Bit 12 needs to stay set for it to perform >the exchange=2E Your right,was confused that dev 0 (fixed link to switch chip) had differe= nt value=2E offset:0 0x81140 =3D> 0x40140 So i should change offset 8 (currently 0x1) to at least 0x1 | BIT(12)? I c= an try to set this in the get_state callback,but i'm unsure i can read out = it on my switch (basic mode changes yes,but not the value directly)=2E=2E= =2Eif mode is not autoneg i will see no change there=2E regards Frank