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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 500EFC433E0 for ; Thu, 28 May 2020 06:39:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 249A4207BC for ; Thu, 28 May 2020 06:39:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="vuUELyRx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726214AbgE1GjO (ORCPT ); Thu, 28 May 2020 02:39:14 -0400 Received: from ssl.serverraum.org ([176.9.125.105]:39891 "EHLO ssl.serverraum.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725601AbgE1GjM (ORCPT ); Thu, 28 May 2020 02:39:12 -0400 Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 81DBD22FB3; Thu, 28 May 2020 08:39:09 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1590647949; 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=4b6uM3yLCOFI3APjiQofRi+B+5helRr/4tG22efAfuk=; b=vuUELyRxavtuBDj35gZS8rBdzHzwP3fDqyJvpSmQcUKS1A+WJKGGsEwaO2DOMIwmcsdDvS HAVMz5Sh8kivBH8lI+NMggyGkLyqdDVJ5QiJxZZPGqEoTqWyslig/XYOVedNzjSku5R5GV zXIGJaWQi6mnfRgqpermFa5RkAjuk54= From: Michael Walle To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: "David S . Miller" , Jakub Kicinski , Andrew Lunn , Michael Walle , Vladimir Oltean , Alex Marginean , Claudiu Manoil , Heiko Thiery Subject: [PATCH net-next v3 2/3] net: enetc: Initialize SerDes for SGMII and USXGMII protocols Date: Thu, 28 May 2020 08:38:46 +0200 Message-Id: <20200528063847.27704-3-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200528063847.27704-1-michael@walle.cc> References: <20200528063847.27704-1-michael@walle.cc> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam: Yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org ENETC has ethernet MACs capable of SGMII, 2500BaseX and USXGMII. But in order to use these protocols some SerDes configurations need to be performed. The SerDes is configurable via an internal PCS PHY which is connected to an internal MDIO bus at address 0. This patch basically removes the dependency on bootloader regarding SerDes initialization. Signed-off-by: Michael Walle --- .../net/ethernet/freescale/enetc/enetc_hw.h | 3 + .../net/ethernet/freescale/enetc/enetc_pf.c | 135 ++++++++++++++++++ .../net/ethernet/freescale/enetc/enetc_pf.h | 2 + 3 files changed, 140 insertions(+) diff --git a/drivers/net/ethernet/freescale/enetc/enetc_hw.h b/drivers/net/ethernet/freescale/enetc/enetc_hw.h index 6314051bc6c1..e80c2c36dbe9 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h +++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h @@ -224,6 +224,9 @@ enum enetc_bdr_type {TX, RX}; #define ENETC_PM0_MAXFRM 0x8014 #define ENETC_SET_TX_MTU(val) ((val) << 16) #define ENETC_SET_MAXFRM(val) ((val) & 0xffff) + +#define ENETC_PM_IMDIO_BASE 0x8030 + #define ENETC_PM0_IF_MODE 0x8300 #define ENETC_PMO_IFM_RG BIT(2) #define ENETC_PM0_IFM_RLP (BIT(5) | BIT(11)) diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c index 824d211ec00f..79499a81c77b 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c @@ -841,6 +841,136 @@ static void enetc_of_put_phy(struct enetc_ndev_priv *priv) of_node_put(priv->phy_node); } +static int enetc_imdio_init(struct enetc_pf *pf, bool is_c45) +{ + struct device *dev = &pf->si->pdev->dev; + struct enetc_mdio_priv *mdio_priv; + struct phy_device *pcs; + struct mii_bus *bus; + int err; + + bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv)); + if (!bus) + return -ENOMEM; + + bus->name = "Freescale ENETC internal MDIO Bus"; + bus->read = enetc_mdio_read; + bus->write = enetc_mdio_write; + bus->parent = dev; + bus->phy_mask = ~0; + mdio_priv = bus->priv; + mdio_priv->hw = &pf->si->hw; + mdio_priv->mdio_base = ENETC_PM_IMDIO_BASE; + snprintf(bus->id, MII_BUS_ID_SIZE, "%s-imdio", dev_name(dev)); + + err = mdiobus_register(bus); + if (err) { + dev_err(dev, "cannot register internal MDIO bus (%d)\n", err); + goto free_mdio_bus; + } + + pcs = get_phy_device(bus, 0, is_c45); + if (IS_ERR(pcs)) { + err = PTR_ERR(pcs); + dev_err(dev, "cannot get internal PCS PHY (%d)\n", err); + goto unregister_mdiobus; + } + + pf->imdio = bus; + pf->pcs = pcs; + + return 0; + +unregister_mdiobus: + mdiobus_unregister(bus); +free_mdio_bus: + devm_mdiobus_free(dev, bus); + return err; +} + +static void enetc_imdio_remove(struct enetc_pf *pf) +{ + if (pf->pcs) + put_device(&pf->pcs->mdio.dev); + if (pf->imdio) + mdiobus_unregister(pf->imdio); +} + +static void enetc_configure_sgmii(struct phy_device *pcs) +{ + /* SGMII spec requires tx_config_Reg[15:0] to be exactly 0x4001 + * for the MAC PCS in order to acknowledge the AN. + */ + phy_write(pcs, MII_ADVERTISE, ADVERTISE_SGMII | ADVERTISE_LPACK); + + phy_write(pcs, ENETC_PCS_IF_MODE, + ENETC_PCS_IF_MODE_SGMII_EN | + ENETC_PCS_IF_MODE_USE_SGMII_AN); + + /* Adjust link timer for SGMII */ + phy_write(pcs, ENETC_PCS_LINK_TIMER1, ENETC_PCS_LINK_TIMER1_VAL); + phy_write(pcs, ENETC_PCS_LINK_TIMER2, ENETC_PCS_LINK_TIMER2_VAL); + + phy_write(pcs, MII_BMCR, BMCR_ANRESTART | BMCR_ANENABLE); +} + +static void enetc_configure_2500basex(struct phy_device *pcs) +{ + phy_write(pcs, ENETC_PCS_IF_MODE, + ENETC_PCS_IF_MODE_SGMII_EN | + ENETC_PCS_IF_MODE_SGMII_SPEED(ENETC_PCS_SPEED_2500)); + + phy_write(pcs, MII_BMCR, BMCR_SPEED1000 | BMCR_FULLDPLX | BMCR_RESET); +} + +static void enetc_configure_usxgmii(struct phy_device *pcs) +{ + /* Configure device ability for the USXGMII Replicator */ + phy_write_mmd(pcs, MDIO_MMD_VEND2, MII_ADVERTISE, + ADVERTISE_SGMII | + ADVERTISE_LPACK | + USXGMII_ADVERTISE_FDX); + + /* Restart PCS AN */ + phy_write_mmd(pcs, MDIO_MMD_VEND2, MII_BMCR, + USXGMII_BMCR_RESET | + USXGMII_BMCR_AN_EN | + USXGMII_BMCR_RST_AN); +} + +static int enetc_configure_serdes(struct enetc_ndev_priv *priv) +{ + bool is_c45 = priv->if_mode == PHY_INTERFACE_MODE_USXGMII; + struct enetc_pf *pf = enetc_si_priv(priv->si); + int err; + + if (priv->if_mode != PHY_INTERFACE_MODE_SGMII && + priv->if_mode != PHY_INTERFACE_MODE_2500BASEX && + priv->if_mode != PHY_INTERFACE_MODE_USXGMII) + return 0; + + err = enetc_imdio_init(pf, is_c45); + if (err) + return err; + + switch (priv->if_mode) { + case PHY_INTERFACE_MODE_SGMII: + enetc_configure_sgmii(pf->pcs); + break; + case PHY_INTERFACE_MODE_2500BASEX: + enetc_configure_2500basex(pf->pcs); + break; + case PHY_INTERFACE_MODE_USXGMII: + enetc_configure_usxgmii(pf->pcs); + break; + default: + dev_err(&pf->si->pdev->dev, "Unsupported link mode %s\n", + phy_modes(priv->if_mode)); + } + + return 0; +} + static int enetc_pf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { @@ -905,6 +1035,10 @@ static int enetc_pf_probe(struct pci_dev *pdev, if (err) dev_warn(&pdev->dev, "Fallback to PHY-less operation\n"); + err = enetc_configure_serdes(priv); + if (err) + dev_warn(&pdev->dev, "Attempted SerDes config but failed\n"); + err = register_netdev(ndev); if (err) goto err_reg_netdev; @@ -940,6 +1074,7 @@ static void enetc_pf_remove(struct pci_dev *pdev) priv = netdev_priv(si->ndev); unregister_netdev(si->ndev); + enetc_imdio_remove(pf); enetc_mdio_remove(pf); enetc_of_put_phy(priv); diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.h b/drivers/net/ethernet/freescale/enetc/enetc_pf.h index 59e65a6f6c3e..2cb922b59f46 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.h +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.h @@ -44,6 +44,8 @@ struct enetc_pf { DECLARE_BITMAP(active_vlans, VLAN_N_VID); struct mii_bus *mdio; /* saved for cleanup */ + struct mii_bus *imdio; + struct phy_device *pcs; }; int enetc_msg_psi_init(struct enetc_pf *pf); -- 2.20.1