From nobody Mon Sep 16 19:17:34 2024 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 13254C77B7A for ; Fri, 26 May 2023 07:43:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242525AbjEZHnV (ORCPT ); Fri, 26 May 2023 03:43:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242526AbjEZHnJ (ORCPT ); Fri, 26 May 2023 03:43:09 -0400 Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::225]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42AEB13A; Fri, 26 May 2023 00:43:05 -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=1685086981; 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=hgk3lxLbNo2xoxXLggeXdKbVXEX79dadPfwJNxSe0cA=; b=mkOtzGgkABIjstbcWvKTxyhZaqAmZv+d8FI5wxh4Sd+sEHjrN+d2Ohj8CQGuXsOAScbdkX KrSgRa2BVGPJhqcW4uhBAGq8Bn6+qHpCNBTpoTYhQNq7gBl7vCgyTQasKXgmYdDZPr2xd2 7M52u8fCwo15gj6Nd5+15NXXzZ1J13C0MH+t/F6jUpHjcofiNuYH/0DXrcIaiAj529e5YO YnP/OBsOZPOwucoyQVeRBeHS7ygGgvXuEZvTkoz2nwKsBxjXG1CYxFa5FPed+sQQONQ8lC eVKq2RzMWR9YjoV7Rk8gtlaHGQDlCqJJPdHDMtR4dwPM7Gdk9fGjUebPKy5XFg== 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 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 DD85E1C0006; Fri, 26 May 2023 07:42:59 +0000 (UTC) From: Maxime Chevallier To: Mark Brown , davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, alexis.lothore@bootlin.com, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Florian Fainelli , Heiner Kallweit , Russell King , Vladimir Oltean , Ioana Ciornei , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, Maxime Coquelin , Jose Abreu , Alexandre Torgue , Giuseppe Cavallaro , Simon Horman Subject: [PATCH net-next v3 2/4] net: ethernet: altera-tse: Convert to mdio-regmap and use PCS Lynx Date: Fri, 26 May 2023 09:42:50 +0200 Message-Id: <20230526074252.480200-3-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230526074252.480200-1-maxime.chevallier@bootlin.com> References: <20230526074252.480200-1-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" The newly introduced regmap-based MDIO driver allows for an easy mapping of an mdiodevice onto the memory-mapped TSE PCS, which is actually a Lynx PCS. Convert Altera TSE to use this PCS instead of the pcs-altera-tse, which is nothing more than a memory-mapped Lynx PCS. Signed-off-by: Maxime Chevallier --- V2->V3 : No changes V1->V2 : No changes drivers/net/ethernet/altera/altera_tse.h | 1 + drivers/net/ethernet/altera/altera_tse_main.c | 57 +++++++++++++++++-- include/linux/mdio/mdio-regmap.h | 2 + 3 files changed, 54 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/altera/altera_tse.h b/drivers/net/etherne= t/altera/altera_tse.h index db5eed06e92d..d50cf440d01b 100644 --- a/drivers/net/ethernet/altera/altera_tse.h +++ b/drivers/net/ethernet/altera/altera_tse.h @@ -477,6 +477,7 @@ struct altera_tse_private { struct phylink *phylink; struct phylink_config phylink_config; struct phylink_pcs *pcs; + struct mdio_device *pcs_mdiodev; }; =20 /* Function prototypes diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/et= hernet/altera/altera_tse_main.c index 190ff1bcd94e..66db6a7d0b22 100644 --- a/drivers/net/ethernet/altera/altera_tse_main.c +++ b/drivers/net/ethernet/altera/altera_tse_main.c @@ -27,14 +27,16 @@ #include #include #include +#include #include #include #include #include #include -#include +#include #include #include +#include #include #include =20 @@ -1134,13 +1136,21 @@ static int altera_tse_probe(struct platform_device = *pdev) const struct of_device_id *of_id =3D NULL; struct altera_tse_private *priv; struct resource *control_port; + struct regmap *pcs_regmap; struct resource *dma_res; struct resource *pcs_res; + struct mii_bus *pcs_bus; struct net_device *ndev; void __iomem *descmap; - int pcs_reg_width =3D 2; int ret =3D -ENODEV; =20 + struct regmap_config pcs_regmap_cfg; + + struct mdio_regmap_config mrc =3D { + .parent =3D &pdev->dev, + .valid_addr =3D 0x0, + }; + ndev =3D alloc_etherdev(sizeof(struct altera_tse_private)); if (!ndev) { dev_err(&pdev->dev, "Could not allocate network device\n"); @@ -1258,10 +1268,29 @@ static int altera_tse_probe(struct platform_device = *pdev) ret =3D request_and_map(pdev, "pcs", &pcs_res, &priv->pcs_base); if (ret) { + /* If we can't find a dedicated resource for the PCS, fallback + * to the internal PCS, that has a different address stride + */ priv->pcs_base =3D priv->mac_dev + tse_csroffs(mdio_phy0); - pcs_reg_width =3D 4; + pcs_regmap_cfg.reg_bits =3D 32; + /* Values are MDIO-like values, on 16 bits */ + pcs_regmap_cfg.val_bits =3D 16; + pcs_regmap_cfg.reg_shift =3D REGMAP_UPSHIFT(2); + } else { + pcs_regmap_cfg.reg_bits =3D 16; + pcs_regmap_cfg.val_bits =3D 16; + pcs_regmap_cfg.reg_shift =3D REGMAP_UPSHIFT(1); } =20 + /* Create a regmap for the PCS so that it can be used by the PCS driver */ + pcs_regmap =3D devm_regmap_init_mmio(&pdev->dev, priv->pcs_base, + &pcs_regmap_cfg); + if (IS_ERR(pcs_regmap)) { + ret =3D PTR_ERR(pcs_regmap); + goto err_free_netdev; + } + mrc.regmap =3D pcs_regmap; + /* Rx IRQ */ priv->rx_irq =3D platform_get_irq_byname(pdev, "rx_irq"); if (priv->rx_irq =3D=3D -ENXIO) { @@ -1384,7 +1413,20 @@ static int altera_tse_probe(struct platform_device *= pdev) (unsigned long) control_port->start, priv->rx_irq, priv->tx_irq); =20 - priv->pcs =3D alt_tse_pcs_create(ndev, priv->pcs_base, pcs_reg_width); + snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-pcs-mii", ndev->name); + pcs_bus =3D devm_mdio_regmap_register(&pdev->dev, &mrc); + if (IS_ERR(pcs_bus)) { + ret =3D PTR_ERR(pcs_bus); + goto err_init_phy; + } + + priv->pcs_mdiodev =3D mdio_device_create(pcs_bus, 0); + + priv->pcs =3D lynx_pcs_create(priv->pcs_mdiodev); + if (!priv->pcs) { + ret =3D -ENODEV; + goto err_init_phy; + } =20 priv->phylink_config.dev =3D &ndev->dev; priv->phylink_config.type =3D PHYLINK_NETDEV; @@ -1407,11 +1449,12 @@ static int altera_tse_probe(struct platform_device = *pdev) if (IS_ERR(priv->phylink)) { dev_err(&pdev->dev, "failed to create phylink\n"); ret =3D PTR_ERR(priv->phylink); - goto err_init_phy; + goto err_pcs; } =20 return 0; - +err_pcs: + mdio_device_free(priv->pcs_mdiodev); err_init_phy: unregister_netdev(ndev); err_register_netdev: @@ -1433,6 +1476,8 @@ static int altera_tse_remove(struct platform_device *= pdev) altera_tse_mdio_destroy(ndev); unregister_netdev(ndev); phylink_destroy(priv->phylink); + mdio_device_free(priv->pcs_mdiodev); + free_netdev(ndev); =20 return 0; diff --git a/include/linux/mdio/mdio-regmap.h b/include/linux/mdio/mdio-reg= map.h index b8508f152552..679d9069846b 100644 --- a/include/linux/mdio/mdio-regmap.h +++ b/include/linux/mdio/mdio-regmap.h @@ -7,6 +7,8 @@ #ifndef MDIO_REGMAP_H #define MDIO_REGMAP_H =20 +#include + struct device; struct regmap; =20 --=20 2.40.1