From patchwork Thu Jan 12 15:15:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 13098186 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 BA98BC54EBC for ; Thu, 12 Jan 2023 15:18:13 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+neBKpyijBBXGgutKf6imBDONhvcNSju4XXRWzjWyo0=; b=tOvzcBGktPyQ8c 2pjJAEwpw73WIbS5aUO0qqlFdFrqyMA7BrYmA2WRzpwEcAkmZdQbIHE2wrxaJFW3YzZTQci7s2f3U 4dg119pIbQs6RfQszglsCva1qU10IMsrqxphFiiTL+DKKZGYVBV6OqV5e3ABvOY2YnFRH16VTzeMx xJcNJsNeKbHFtgz856HxdbBSyUyxdN2RMbElJVM72jkvvb+KXdiaE0jpdDqZQHwNmAFuFTwM00vRJ 5G87dVSlO8F4o1wUPg352Xge82hQ23Eui0ZLtOqGwtT1e2zr2155H5ABRP9oyfKP0K6kGLdTdKMyB SilZDxluA0WyE9UhozVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pFzK0-00FYzT-J4; Thu, 12 Jan 2023 15:16:53 +0000 Received: from 0001.3ffe.de ([159.69.201.130] helo=mail.3ffe.de) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pFzIk-00FYOy-A1; Thu, 12 Jan 2023 15:15:38 +0000 Received: from mwalle01.sab.local (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.3ffe.de (Postfix) with ESMTPSA id 3F45B16D0; Thu, 12 Jan 2023 16:15:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2022082101; t=1673536527; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GHiclTSJcQpEuXc7UZJCs+DUc7vMe7Q2Zx9qkP/i6VE=; b=v2xaDV+uTTGZtERRTebXFr9t/CTFUCCN4cIyZ36GhKO6lzWaiK6KNnXMqdsfJ6FC6hOlr1 cMQIaSkUzmLe05Kkra3vSNOCD67P5B0c+FnQM71eVfwP7LAYft7Za0E8e4hsHFVeP+D33b gVw0+UOT+g2TEcxMRSCIFZVzNPSiMMjoN4Aoogtd/83d4apM4H9AwxC2+Ga5Mq0ZPYezqg hHSwR+rwZXD6/B8nHnzpdi2tGbZSnRhe5OoWjgWV0B3zyVaFydCpBEHcdhFwiIKoJvDrR0 ZYu9qvGBlRIPTgTMH8KuVwtuD81vpI44p7MTkR7mVtmCNV1iMzWZYpVoIrIs0Q== From: Michael Walle Date: Thu, 12 Jan 2023 16:15:14 +0100 Subject: [PATCH net-next 08/10] net: stmmac: Separate C22 and C45 transactions for xgmac2 MIME-Version: 1.0 Message-Id: <20230112-net-next-c45-seperation-part-2-v1-8-5eeaae931526@walle.cc> References: <20230112-net-next-c45-seperation-part-2-v1-0-5eeaae931526@walle.cc> In-Reply-To: <20230112-net-next-c45-seperation-part-2-v1-0-5eeaae931526@walle.cc> To: Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ray Jui , Scott Branden , Broadcom internal kernel review list , Joel Stanley , Andrew Jeffery , Felix Fietkau , John Crispin , Sean Wang , Mark Lee , Lorenzo Bianconi , Matthias Brugger , Bryan Whitehead , UNGLinuxDriver@microchip.com, Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , Maxime Coquelin , Vladimir Oltean , Claudiu Manoil , Alexandre Belloni , Florian Fainelli , Li Yang Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-mediatek@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linuxppc-dev@lists.ozlabs.org, Andrew Lunn , Michael Walle X-Mailer: b4 0.11.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230112_071534_781470_FA75D04B X-CRM114-Status: GOOD ( 18.50 ) 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 From: Andrew Lunn The stmicro stmmac xgmac2 MDIO bus driver can perform both C22 and C45 transfers. Create separate functions for each and register the C45 versions using the new API calls where appropriate. Signed-off-by: Andrew Lunn Signed-off-by: Michael Walle --- drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 131 +++++++++++++--------- 1 file changed, 81 insertions(+), 50 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c index 5f177ea80725..4836a40df1af 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c @@ -45,8 +45,8 @@ #define MII_XGMAC_PA_SHIFT 16 #define MII_XGMAC_DA_SHIFT 21 -static int stmmac_xgmac2_c45_format(struct stmmac_priv *priv, int phyaddr, - int phyreg, u32 *hw_addr) +static void stmmac_xgmac2_c45_format(struct stmmac_priv *priv, int phyaddr, + int devad, int phyreg, u32 *hw_addr) { u32 tmp; @@ -56,19 +56,14 @@ static int stmmac_xgmac2_c45_format(struct stmmac_priv *priv, int phyaddr, writel(tmp, priv->ioaddr + XGMAC_MDIO_C22P); *hw_addr = (phyaddr << MII_XGMAC_PA_SHIFT) | (phyreg & 0xffff); - *hw_addr |= (phyreg >> MII_DEVADDR_C45_SHIFT) << MII_XGMAC_DA_SHIFT; - return 0; + *hw_addr |= devad << MII_XGMAC_DA_SHIFT; } -static int stmmac_xgmac2_c22_format(struct stmmac_priv *priv, int phyaddr, - int phyreg, u32 *hw_addr) +static void stmmac_xgmac2_c22_format(struct stmmac_priv *priv, int phyaddr, + int phyreg, u32 *hw_addr) { u32 tmp; - /* HW does not support C22 addr >= 4 */ - if (phyaddr > MII_XGMAC_MAX_C22ADDR) - return -ENODEV; - /* Set port as Clause 22 */ tmp = readl(priv->ioaddr + XGMAC_MDIO_C22P); tmp &= ~MII_XGMAC_C22P_MASK; @@ -76,16 +71,14 @@ static int stmmac_xgmac2_c22_format(struct stmmac_priv *priv, int phyaddr, writel(tmp, priv->ioaddr + XGMAC_MDIO_C22P); *hw_addr = (phyaddr << MII_XGMAC_PA_SHIFT) | (phyreg & 0x1f); - return 0; } -static int stmmac_xgmac2_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg) +static int stmmac_xgmac2_mdio_read(struct stmmac_priv *priv, u32 addr, + u32 value) { - struct net_device *ndev = bus->priv; - struct stmmac_priv *priv = netdev_priv(ndev); unsigned int mii_address = priv->hw->mii.addr; unsigned int mii_data = priv->hw->mii.data; - u32 tmp, addr, value = MII_XGMAC_BUSY; + u32 tmp; int ret; ret = pm_runtime_resume_and_get(priv->device); @@ -99,20 +92,6 @@ static int stmmac_xgmac2_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg) goto err_disable_clks; } - if (phyreg & MII_ADDR_C45) { - phyreg &= ~MII_ADDR_C45; - - ret = stmmac_xgmac2_c45_format(priv, phyaddr, phyreg, &addr); - if (ret) - goto err_disable_clks; - } else { - ret = stmmac_xgmac2_c22_format(priv, phyaddr, phyreg, &addr); - if (ret) - goto err_disable_clks; - - value |= MII_XGMAC_SADDR; - } - value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift) & priv->hw->mii.clk_csr_mask; value |= MII_XGMAC_READ; @@ -144,14 +123,44 @@ static int stmmac_xgmac2_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg) return ret; } -static int stmmac_xgmac2_mdio_write(struct mii_bus *bus, int phyaddr, - int phyreg, u16 phydata) +static int stmmac_xgmac2_mdio_read_c22(struct mii_bus *bus, int phyaddr, + int phyreg) { struct net_device *ndev = bus->priv; - struct stmmac_priv *priv = netdev_priv(ndev); + struct stmmac_priv *priv; + u32 addr; + + priv = netdev_priv(ndev); + + /* HW does not support C22 addr >= 4 */ + if (phyaddr > MII_XGMAC_MAX_C22ADDR) + return -ENODEV; + + stmmac_xgmac2_c22_format(priv, phyaddr, phyreg, &addr); + + return stmmac_xgmac2_mdio_read(priv, addr, MII_XGMAC_BUSY); +} + +static int stmmac_xgmac2_mdio_read_c45(struct mii_bus *bus, int phyaddr, + int devad, int phyreg) +{ + struct net_device *ndev = bus->priv; + struct stmmac_priv *priv; + u32 addr; + + priv = netdev_priv(ndev); + + stmmac_xgmac2_c45_format(priv, phyaddr, devad, phyreg, &addr); + + return stmmac_xgmac2_mdio_read(priv, addr, MII_XGMAC_BUSY); +} + +static int stmmac_xgmac2_mdio_write(struct stmmac_priv *priv, u32 addr, + u32 value, u16 phydata) +{ unsigned int mii_address = priv->hw->mii.addr; unsigned int mii_data = priv->hw->mii.data; - u32 addr, tmp, value = MII_XGMAC_BUSY; + u32 tmp; int ret; ret = pm_runtime_resume_and_get(priv->device); @@ -165,20 +174,6 @@ static int stmmac_xgmac2_mdio_write(struct mii_bus *bus, int phyaddr, goto err_disable_clks; } - if (phyreg & MII_ADDR_C45) { - phyreg &= ~MII_ADDR_C45; - - ret = stmmac_xgmac2_c45_format(priv, phyaddr, phyreg, &addr); - if (ret) - goto err_disable_clks; - } else { - ret = stmmac_xgmac2_c22_format(priv, phyaddr, phyreg, &addr); - if (ret) - goto err_disable_clks; - - value |= MII_XGMAC_SADDR; - } - value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift) & priv->hw->mii.clk_csr_mask; value |= phydata; @@ -205,6 +200,40 @@ static int stmmac_xgmac2_mdio_write(struct mii_bus *bus, int phyaddr, return ret; } +static int stmmac_xgmac2_mdio_write_c22(struct mii_bus *bus, int phyaddr, + int phyreg, u16 phydata) +{ + struct net_device *ndev = bus->priv; + struct stmmac_priv *priv; + u32 addr; + + priv = netdev_priv(ndev); + + /* HW does not support C22 addr >= 4 */ + if (phyaddr > MII_XGMAC_MAX_C22ADDR) + return -ENODEV; + + stmmac_xgmac2_c22_format(priv, phyaddr, phyreg, &addr); + + return stmmac_xgmac2_mdio_write(priv, addr, + MII_XGMAC_BUSY | MII_XGMAC_SADDR, phydata); +} + +static int stmmac_xgmac2_mdio_write_c45(struct mii_bus *bus, int phyaddr, + int devad, int phyreg, u16 phydata) +{ + struct net_device *ndev = bus->priv; + struct stmmac_priv *priv; + u32 addr; + + priv = netdev_priv(ndev); + + stmmac_xgmac2_c45_format(priv, phyaddr, devad, phyreg, &addr); + + return stmmac_xgmac2_mdio_write(priv, addr, MII_XGMAC_BUSY, + phydata); +} + /** * stmmac_mdio_read * @bus: points to the mii_bus structure @@ -457,8 +486,10 @@ int stmmac_mdio_register(struct net_device *ndev) new_bus->probe_capabilities = MDIOBUS_C22_C45; if (priv->plat->has_xgmac) { - new_bus->read = &stmmac_xgmac2_mdio_read; - new_bus->write = &stmmac_xgmac2_mdio_write; + new_bus->read = &stmmac_xgmac2_mdio_read_c22; + new_bus->write = &stmmac_xgmac2_mdio_write_c22; + new_bus->read_c45 = &stmmac_xgmac2_mdio_read_c45; + new_bus->write_c45 = &stmmac_xgmac2_mdio_write_c45; /* Right now only C22 phys are supported */ max_addr = MII_XGMAC_MAX_C22ADDR + 1; @@ -490,7 +521,7 @@ int stmmac_mdio_register(struct net_device *ndev) /* Looks like we need a dummy read for XGMAC only and C45 PHYs */ if (priv->plat->has_xgmac) - stmmac_xgmac2_mdio_read(new_bus, 0, MII_ADDR_C45); + stmmac_xgmac2_mdio_read_c45(new_bus, 0, 0, 0); /* If fixed-link is set, skip PHY scanning */ if (!fwnode)