From patchwork Wed May 24 13:08:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13253978 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 51369C77B73 for ; Wed, 24 May 2023 13:09:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=m4RRYu3TNTJB5UZjroZdlwMFxRb5O6iBfguVrp4UJSk=; b=D8+/MjYdjBI0L/ 1d3Di3jECoKaTav164umI2HTIDhjuExBKhugzNe0+ZbbxCepDj94qV2iOJNWTqvADehqcrGWA0is3 lYAutGy0HjO/A24basEsLVz34PEQsbhg09rbWkTqqX/3hnmjsx94ROSCDPhZBSiw6XFAcH7y12OS7 oX4qH5wO56mc7N7TLbhKSGnLwK1MZPxbma4/c9mESntcFY7pw4bpdCGW/lFfzNi4PKB5UPokLxykJ 1qpGbuDAdtLHDPAJOEnSRafVYkAu/GMkrSW69jnuDQixgKrIMpEaHVaZzIaEjV80RuOlPcKvLtst0 KVIBR5jlLsTphAIUAwOw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q1oEH-00DWke-2r; Wed, 24 May 2023 13:08:37 +0000 Received: from relay9-d.mail.gandi.net ([2001:4b98:dc4:8::229]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q1oE6-00DWbv-0Y for linux-arm-kernel@lists.infradead.org; Wed, 24 May 2023 13:08:27 +0000 Received: (Authenticated sender: maxime.chevallier@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 1228EFF812; Wed, 24 May 2023 13:08:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1684933698; 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=UML/HQzv1bXDYAb0sUpe3dCwmMQADF0HA1+wJ+YRJiw=; b=UDd2UcbOCEvml5+n524nkqaPRAIn8snkyV66HTR99Asx4v6B3o9CHGd7cABdRRuhwaeiZF x6vwV5OrkB2rFVGDTgDNOIIk4CKbKJ3wLCfPS1xE1BkreAAI2AzmyURDYLxDZdTZjoZH3x t+dnvcdQmM1Zsx4VFW6qr4d/+hSdWKxczZrTfHYMUgrq4Dk4FnWYOROVjL+fJPAzy+63YR 1g0E80buYUyVKgOCW8XXRvh3jNNxIF5qnao6RTrn7zOUwoCv8c5YktorKu35bpi6cXK22e IKrSekUicQqs1lbLDiTNc22lvKbpXevqNfZ97mTiLDkVJmniLAsF4DFFXWFbNg== 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 Subject: [PATCH net-next 2/4] net: ethernet: altera-tse: Convert to mdio-regmap and use PCS Lynx Date: Wed, 24 May 2023 15:08:05 +0200 Message-Id: <20230524130807.310089-3-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230524130807.310089-1-maxime.chevallier@bootlin.com> References: <20230524130807.310089-1-maxime.chevallier@bootlin.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230524_060826_500536_93EBC0CB X-CRM114-Status: GOOD ( 19.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- 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/ethernet/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; }; /* Function prototypes diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/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 @@ -1134,13 +1136,21 @@ static int altera_tse_probe(struct platform_device *pdev) const struct of_device_id *of_id = 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 = 2; int ret = -ENODEV; + struct regmap_config pcs_regmap_cfg; + + struct mdio_regmap_config mrc = { + .parent = &pdev->dev, + .valid_addr = 0x0, + }; + ndev = 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 = 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 = priv->mac_dev + tse_csroffs(mdio_phy0); - pcs_reg_width = 4; + pcs_regmap_cfg.reg_bits = 32; + /* Values are MDIO-like values, on 16 bits */ + pcs_regmap_cfg.val_bits = 16; + pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(2); + } else { + pcs_regmap_cfg.reg_bits = 16; + pcs_regmap_cfg.val_bits = 16; + pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(1); } + /* Create a regmap for the PCS so that it can be used by the PCS driver */ + pcs_regmap = devm_regmap_init_mmio(&pdev->dev, priv->pcs_base, + &pcs_regmap_cfg); + if (IS_ERR(pcs_regmap)) { + ret = PTR_ERR(pcs_regmap); + goto err_free_netdev; + } + mrc.regmap = pcs_regmap; + /* Rx IRQ */ priv->rx_irq = platform_get_irq_byname(pdev, "rx_irq"); if (priv->rx_irq == -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); - priv->pcs = 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 = devm_mdio_regmap_register(&pdev->dev, &mrc); + if (IS_ERR(pcs_bus)) { + ret = PTR_ERR(pcs_bus); + goto err_init_phy; + } + + priv->pcs_mdiodev = mdio_device_create(pcs_bus, 0); + + priv->pcs = lynx_pcs_create(priv->pcs_mdiodev); + if (!priv->pcs) { + ret = -ENODEV; + goto err_init_phy; + } priv->phylink_config.dev = &ndev->dev; priv->phylink_config.type = 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 = PTR_ERR(priv->phylink); - goto err_init_phy; + goto err_pcs; } 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); return 0; diff --git a/include/linux/mdio/mdio-regmap.h b/include/linux/mdio/mdio-regmap.h index 536a5bfcce35..d09968bbc4ce 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 +#include + struct device; struct regmap;