From nobody Sun Feb 8 15:28:35 2026 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 BA58CC7EE37 for ; Thu, 8 Jun 2023 15:52:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237450AbjFHPwQ (ORCPT ); Thu, 8 Jun 2023 11:52:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237279AbjFHPwD (ORCPT ); Thu, 8 Jun 2023 11:52:03 -0400 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFC7530C1; Thu, 8 Jun 2023 08:51:43 -0700 (PDT) X-GND-Sasl: maxime.chevallier@bootlin.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1686239502; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C4HWsGpzkoFGrF2QEu9yk0kkw2l8QL+Vcx0ZQoZOw4Y=; b=TkCouUfK9yU3pOqfJL8pfY9GNp+gYl9ldNM03VgVv9DUkJTiKLn7/EyDPIDe2AONR3ML3M 37ZQqHMOpzFLIS5Bof15p4xWSyF5nWpAoEnqFZrdM+Jv/0DoZtb0swRzfL1751Bj7fidP+ Lg1Zi8oCc07/ScByUwnpoXrv6r/Sow/5n2gdOKJUw5e95lChqXzhdYSapDoHS65Dgqf6hI 5euLD+cBEI3ZmZtZtWmU4duuqmXZ9dmF4YF3r71f13u70mLz5DDr4M1TvdHDqr97LXSYd1 tiqO9vr/8Arz2dXSfUiOfVx110roCokdh8klZpciUNXfOvtzkIKpwak/pygZxw== X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com X-GND-Sasl: maxime.chevallier@bootlin.com Received: by mail.gandi.net (Postfix) with ESMTPSA id C5B3D60010; Thu, 8 Jun 2023 15:51:40 +0000 (UTC) From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Florian Fainelli , Heiner Kallweit , Russell King , linux-arm-kernel@lists.infradead.org, Horatiu.Vultur@microchip.com, Allan.Nielsen@microchip.com, UNGLinuxDriver@microchip.com, Vladimir Oltean Subject: [PATCH net 2/2] net: phylink: use USXGMII control-word format to parse Q-USGMII word Date: Thu, 8 Jun 2023 18:34:15 +0200 Message-Id: <20230608163415.511762-4-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230608163415.511762-1-maxime.chevallier@bootlin.com> References: <20230608163415.511762-1-maxime.chevallier@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Q-USGMII is a derivative of USGMII, that uses a specific formatting for the control word. The layout is close to the USXGMII control word, but doesn't support speeds over 1Gbps. Use a dedicated decoding logic for the USGMII control word, re-using USXGMII definitions with a custom mask and only considering 10/100/1000 speeds Fixes: 5e61fe157a27 ("net: phy: Introduce QUSGMII PHY mode") Signed-off-by: Maxime Chevallier --- drivers/net/phy/phylink.c | 39 ++++++++++++++++++++++++++++++++++++++- include/uapi/linux/mdio.h | 3 +++ 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 809e6d5216dc..730f8860d2a6 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -3298,6 +3298,41 @@ void phylink_decode_usxgmii_word(struct phylink_link= _state *state, } EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); =20 +/** + * phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS + * @state: a pointer to a struct phylink_link_state. + * @lpa: a 16 bit value which stores the USGMII auto-negotiation word + * + * Helper for MAC PCS supporting the USGMII protocol and the auto-negotiat= ion + * code word. Decode the USGMII code word and populate the corresponding = fields + * (speed, duplex) into the phylink_link_state structure. The structure fo= r this + * word is the same as the USXGMII word, expect it only supports speeds up= to + * 1Gbps. + */ +static void phylink_decode_usgmii_word(struct phylink_link_state *state, + uint16_t lpa) +{ + switch (lpa & MDIO_USGMII_SPD_MASK) { + case MDIO_USXGMII_10: + state->speed =3D SPEED_10; + break; + case MDIO_USXGMII_100: + state->speed =3D SPEED_100; + break; + case MDIO_USXGMII_1000: + state->speed =3D SPEED_1000; + break; + default: + state->link =3D false; + return; + } + + if (lpa & MDIO_USXGMII_FULL_DUPLEX) + state->duplex =3D DUPLEX_FULL; + else + state->duplex =3D DUPLEX_HALF; +} + /** * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII regi= sters * @state: a pointer to a &struct phylink_link_state. @@ -3335,9 +3370,11 @@ void phylink_mii_c22_pcs_decode_state(struct phylink= _link_state *state, =20 case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_QSGMII: - case PHY_INTERFACE_MODE_QUSGMII: phylink_decode_sgmii_word(state, lpa); break; + case PHY_INTERFACE_MODE_QUSGMII: + phylink_decode_usgmii_word(state, lpa); + break; =20 default: state->link =3D false; diff --git a/include/uapi/linux/mdio.h b/include/uapi/linux/mdio.h index 256b463e47a6..1d20a9082507 100644 --- a/include/uapi/linux/mdio.h +++ b/include/uapi/linux/mdio.h @@ -444,4 +444,7 @@ static inline __u16 mdio_phy_id_c45(int prtad, int deva= d) #define MDIO_USXGMII_5000FULL 0x1a00 /* 5000Mbps full-duplex */ #define MDIO_USXGMII_LINK 0x8000 /* PHY link with copper-side partner */ =20 +/* Usgmii control word is based on Usxgmii, masking away 2.5, 5 and 10Gbps= */ +#define MDIO_USGMII_SPD_MASK 0x0600 + #endif /* _UAPI__LINUX_MDIO_H__ */ --=20 2.40.1