From patchwork Mon Mar 15 15:45:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?= X-Patchwork-Id: 12139881 X-Patchwork-Delegate: kuba@kernel.org 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 28543C43332 for ; Mon, 15 Mar 2021 15:46:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0E9164EE1 for ; Mon, 15 Mar 2021 15:46:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231561AbhCOPpo (ORCPT ); Mon, 15 Mar 2021 11:45:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231575AbhCOPpe (ORCPT ); Mon, 15 Mar 2021 11:45:34 -0400 Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1C80C06174A; Mon, 15 Mar 2021 08:45:33 -0700 (PDT) Received: by mail-wm1-x32b.google.com with SMTP id g20so8405554wmk.3; Mon, 15 Mar 2021 08:45:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=7zidAh8iuTF0Kc8fsEe5bDCb1/wU5HukfUwj/mszyQY=; b=bZPynnspLZDb5z4QGVFC4oEZkSof1OEk5A4lmF/1dM+urAOTA4S50i73af6uhTQeoY IRvK8KjZU+YFMAxT0ChpSqKTkDNFsmisLb9CbISrDTtaHk6iFMOfxMGj0MBwseUuCVwq Ki3qSJsI/wWfvSqG/Lkaz3+aCHKuIZlBRagqIPb+tY1NAF+yrlG1XXslTCrpIMDuBP8B W5lgvFAzwj2S+QkQ2PpC9DVL1kO2GvVCkMc5cRBs48V6pem2Q5ErrOwwzirlvcjzQvMP chnh73lqedAlyj7g1t5dWI39GTA7r8StFyC8CXOj4I8owUYAm/YXdNgnn5H39TYW6R+2 3xcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7zidAh8iuTF0Kc8fsEe5bDCb1/wU5HukfUwj/mszyQY=; b=dB7wwCSMxtHgsWhVu9sojuIbYlW1m/UObt113t60WwcptMrOmQH4918nMlDKb+JluA RZOco4NCsRNkuFHtayUVWFklaF+/fAIic8BtVYvZh6MAuFcL54bp4R1LhqQtAJl9rjwo oEfU+uEi+1alx7eqvVNBq9pLdKFTDJLoq9oorZfQ60ysaw7BJqTDp7mZ6gt6DvwRp3NJ z0svNabmWhtBRf7fZZP0ZFOfHV5ad2FT077IkQZSOXpH1nqvMKNpY+C5HV1Y9IoOUoD6 ZLaum6NO8134MFGNuCIe390k5SJ6pbhLu9TN5JhmFsemo2vZaY3ECOcy4booTymymWH2 FgBw== X-Gm-Message-State: AOAM530j/VfltiRhj/MEnGuKBzN+zgoAVfWLxNXEkH+zqGAMEBDJ/fqb Xg3l4mqIi/oVqBICSUe2+FQ= X-Google-Smtp-Source: ABdhPJxXACo8qVVdJB+S7MmREzRC9GqjIRZLDrCW6uzjYfrkfsTENRP4MHcoGrnYPQIGZbHIuJSjYQ== X-Received: by 2002:a05:600c:204f:: with SMTP id p15mr269886wmg.165.1615823132542; Mon, 15 Mar 2021 08:45:32 -0700 (PDT) Received: from skynet.lan ([80.31.204.166]) by smtp.gmail.com with ESMTPSA id i10sm18043507wrs.11.2021.03.15.08.45.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Mar 2021 08:45:32 -0700 (PDT) From: =?utf-8?q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?= To: jonas.gorski@gmail.com, "David S. Miller" , Jakub Kicinski , Rob Herring , Andrew Lunn , Heiner Kallweit , Russell King , =?utf-8?q?Fern=C3=A1ndez_Rojas?= , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 net-next 2/2] net: mdio: Add BCM6368 MDIO mux bus controller Date: Mon, 15 Mar 2021 16:45:28 +0100 Message-Id: <20210315154528.30212-3-noltari@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210315154528.30212-1-noltari@gmail.com> References: <20210315154528.30212-1-noltari@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This controller is present on BCM6318, BCM6328, BCM6362, BCM6368 and BCM63268 SoCs. Signed-off-by: Álvaro Fernández Rojas --- v2: add missing module author, description and license. drivers/net/mdio/Kconfig | 11 ++ drivers/net/mdio/Makefile | 1 + drivers/net/mdio/mdio-mux-bcm6368.c | 183 ++++++++++++++++++++++++++++ 3 files changed, 195 insertions(+) create mode 100644 drivers/net/mdio/mdio-mux-bcm6368.c diff --git a/drivers/net/mdio/Kconfig b/drivers/net/mdio/Kconfig index a10cc460d7cf..d06e06f5e31a 100644 --- a/drivers/net/mdio/Kconfig +++ b/drivers/net/mdio/Kconfig @@ -200,6 +200,17 @@ config MDIO_BUS_MUX_MESON_G12A the amlogic g12a SoC. The multiplexers connects either the external or the internal MDIO bus to the parent bus. +config MDIO_BUS_MUX_BCM6368 + tristate "Broadcom BCM6368 MDIO bus multiplexers" + depends on OF && OF_MDIO && (BMIPS_GENERIC || COMPILE_TEST) + select MDIO_BUS_MUX + default BMIPS_GENERIC + help + This module provides a driver for MDIO bus multiplexers found in + BCM6368 based Broadcom SoCs. This multiplexer connects one of several + child MDIO bus to a parent bus. Buses could be internal as well as + external and selection logic lies inside the same multiplexer. + config MDIO_BUS_MUX_BCM_IPROC tristate "Broadcom iProc based MDIO bus multiplexers" depends on OF && OF_MDIO && (ARCH_BCM_IPROC || COMPILE_TEST) diff --git a/drivers/net/mdio/Makefile b/drivers/net/mdio/Makefile index 5c498dde463f..c3ec0ef989df 100644 --- a/drivers/net/mdio/Makefile +++ b/drivers/net/mdio/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_MDIO_THUNDER) += mdio-thunder.o obj-$(CONFIG_MDIO_XGENE) += mdio-xgene.o obj-$(CONFIG_MDIO_BUS_MUX) += mdio-mux.o +obj-$(CONFIG_MDIO_BUS_MUX_BCM6368) += mdio-mux-bcm6368.o obj-$(CONFIG_MDIO_BUS_MUX_BCM_IPROC) += mdio-mux-bcm-iproc.o obj-$(CONFIG_MDIO_BUS_MUX_GPIO) += mdio-mux-gpio.o obj-$(CONFIG_MDIO_BUS_MUX_MESON_G12A) += mdio-mux-meson-g12a.o diff --git a/drivers/net/mdio/mdio-mux-bcm6368.c b/drivers/net/mdio/mdio-mux-bcm6368.c new file mode 100644 index 000000000000..0abd83a9124f --- /dev/null +++ b/drivers/net/mdio/mdio-mux-bcm6368.c @@ -0,0 +1,184 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Broadcom BCM6368 mdiomux bus controller driver + * + * Copyright (C) 2021 Álvaro Fernández Rojas + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MDIOC_REG 0x0 +#define MDIOC_EXT_MASK BIT(16) +#define MDIOC_REG_SHIFT 20 +#define MDIOC_PHYID_SHIFT 25 +#define MDIOC_RD_MASK BIT(30) +#define MDIOC_WR_MASK BIT(31) + +#define MDIOD_REG 0x4 + +struct bcm6368_mdiomux_desc { + void *mux_handle; + void __iomem *base; + struct device *dev; + struct mii_bus *mii_bus; + int ext_phy; +}; + +static int bcm6368_mdiomux_read(struct mii_bus *bus, int phy_id, int loc) +{ + struct bcm6368_mdiomux_desc *md = bus->priv; + uint32_t reg; + int ret; + + __raw_writel(0, md->base + MDIOC_REG); + + reg = MDIOC_RD_MASK | + (phy_id << MDIOC_PHYID_SHIFT) | + (loc << MDIOC_REG_SHIFT); + if (md->ext_phy) + reg |= MDIOC_EXT_MASK; + + __raw_writel(reg, md->base + MDIOC_REG); + udelay(50); + ret = __raw_readw(md->base + MDIOD_REG); + + return ret; +} + +static int bcm6368_mdiomux_write(struct mii_bus *bus, int phy_id, int loc, + uint16_t val) +{ + struct bcm6368_mdiomux_desc *md = bus->priv; + uint32_t reg; + + __raw_writel(0, md->base + MDIOC_REG); + + reg = MDIOC_WR_MASK | + (phy_id << MDIOC_PHYID_SHIFT) | + (loc << MDIOC_REG_SHIFT); + if (md->ext_phy) + reg |= MDIOC_EXT_MASK; + reg |= val; + + __raw_writel(reg, md->base + MDIOC_REG); + udelay(50); + + return 0; +} + +static int bcm6368_mdiomux_switch_fn(int current_child, int desired_child, + void *data) +{ + struct bcm6368_mdiomux_desc *md = data; + + md->ext_phy = desired_child; + + return 0; +} + +static int bcm6368_mdiomux_probe(struct platform_device *pdev) +{ + struct bcm6368_mdiomux_desc *md; + struct mii_bus *bus; + struct resource *res; + int rc; + + md = devm_kzalloc(&pdev->dev, sizeof(*md), GFP_KERNEL); + if (!md) + return -ENOMEM; + md->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + + /* + * Just ioremap, as this MDIO block is usually integrated into an + * Ethernet MAC controller register range + */ + md->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!md->base) { + dev_err(&pdev->dev, "failed to ioremap register\n"); + return -ENOMEM; + } + + md->mii_bus = devm_mdiobus_alloc(&pdev->dev); + if (!md->mii_bus) { + dev_err(&pdev->dev, "mdiomux bus alloc failed\n"); + return ENOMEM; + } + + bus = md->mii_bus; + bus->priv = md; + bus->name = "BCM6368 MDIO mux bus"; + snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id); + bus->parent = &pdev->dev; + bus->read = bcm6368_mdiomux_read; + bus->write = bcm6368_mdiomux_write; + bus->phy_mask = 0x3f; + bus->dev.of_node = pdev->dev.of_node; + + rc = mdiobus_register(bus); + if (rc) { + dev_err(&pdev->dev, "mdiomux registration failed\n"); + return rc; + } + + platform_set_drvdata(pdev, md); + + rc = mdio_mux_init(md->dev, md->dev->of_node, + bcm6368_mdiomux_switch_fn, &md->mux_handle, md, + md->mii_bus); + if (rc) { + dev_info(md->dev, "mdiomux initialization failed\n"); + goto out_register; + } + + dev_info(&pdev->dev, "Broadcom BCM6368 MDIO mux bus\n"); + + return 0; + +out_register: + mdiobus_unregister(bus); + return rc; +} + +static int bcm6368_mdiomux_remove(struct platform_device *pdev) +{ + struct bcm6368_mdiomux_desc *md = platform_get_drvdata(pdev); + + mdio_mux_uninit(md->mux_handle); + mdiobus_unregister(md->mii_bus); + + return 0; +} + +static const struct of_device_id bcm6368_mdiomux_ids[] = { + { .compatible = "brcm,bcm6368-mdio-mux", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, bcm6368_mdiomux_ids); + +static struct platform_driver bcm6368_mdiomux_driver = { + .driver = { + .name = "bcm6368-mdio-mux", + .of_match_table = bcm6368_mdiomux_ids, + }, + .probe = bcm6368_mdiomux_probe, + .remove = bcm6368_mdiomux_remove, +}; +module_platform_driver(bcm6368_mdiomux_driver); + +MODULE_AUTHOR("Álvaro Fernández Rojas "); +MODULE_DESCRIPTION("BCM6368 mdiomux bus controller driver"); +MODULE_LICENSE("GPL v2");