From patchwork Tue May 4 22:29:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 12238617 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=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 B0D20C43460 for ; Tue, 4 May 2021 22:30:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7971B613DD for ; Tue, 4 May 2021 22:30:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233356AbhEDWbS (ORCPT ); Tue, 4 May 2021 18:31:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233036AbhEDWao (ORCPT ); Tue, 4 May 2021 18:30:44 -0400 Received: from mail-ed1-x531.google.com (mail-ed1-x531.google.com [IPv6:2a00:1450:4864:20::531]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB586C06134C; Tue, 4 May 2021 15:29:48 -0700 (PDT) Received: by mail-ed1-x531.google.com with SMTP id u13so9599528edd.3; Tue, 04 May 2021 15:29:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Ste482S+caberMonV+nJ/r/9b0oXoNQbzg4c027HzJA=; b=YodBcEz/tDpTDjuPP6XSjtZtCF5vmImPMlBIKye/ziVWDEAX7UKLWIrw4brXkOyv9q RQnQ/s3SGqwqDsvfn6TKnVJroP/4waByqFuVfXDeVV/td8K84gUkG5uqexO2d3wcesoS lMTAMZ/nssqZSQUiUecp4fqbqRVsMmI1NMojAN6drFG/iR2YhmkzPODyYdBY+t0z6w8C nlxldkwfVx/M6AOmx0LhJVW2yGf3AUWZJJ9g7LSPkpGtG30s5vZtVZQLVXF1J+dNa0bf NFPvdxX4kKDeKTkYk1chKLaALeolFPF5irg1Y9msXEl5hp66b4iV361q6Kp/cSRwopO9 9osQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Ste482S+caberMonV+nJ/r/9b0oXoNQbzg4c027HzJA=; b=DByJjwsEwBPX9GdDq63Aq0aNImKsBuGiLh37Hv943Yns1Hv5hyNpMTCJfoamk+vvf5 Q1UJqVmQrinZNQZHkCl4Y/qvHwpRqZ/yuVxpqtth2uAMNS2mAwvgZGG8W/XVjwK0XMio 230/omm8ZCkPpODfmvFCKLLA8nzypEwogY/bxr3M7OistRNgE9bSq+BDKdxa0GjnJkfQ YH51IPQ3uAPM4DesC994fLZtupSLJiF4Ulku7cdSMvwJfr9hgl8iAxZX+VuVhELwHctG glO9dItTHQJ1Vcf052wB2tw7/Ja2x9Zoj3Jt90IPv7vu9rU2G4CUnqCXGji0hAKne2fo /y+w== X-Gm-Message-State: AOAM530kw7ZgGSUkSrOkvEPyUA4jEwnJJuxD3Vc21memSFs8WRwH8gpw 6zbdHrOC+5yvlGp/3BlbwkU= X-Google-Smtp-Source: ABdhPJxVHAfjFXzXX59Y8cA8YNOojeYfzkSpaxcOgYx64pkY9jv05zEP0cVSVCC/ZiNMkYfPKhPmWQ== X-Received: by 2002:aa7:d306:: with SMTP id p6mr11856593edq.168.1620167387444; Tue, 04 May 2021 15:29:47 -0700 (PDT) Received: from Ansuel-xps.localdomain (93-35-189-2.ip56.fastwebnet.it. [93.35.189.2]) by smtp.googlemail.com with ESMTPSA id q12sm2052946ejy.91.2021.05.04.15.29.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 May 2021 15:29:47 -0700 (PDT) From: Ansuel Smith To: Florian Fainelli Cc: Ansuel Smith , Andrew Lunn , Vivien Didelot , Vladimir Oltean , "David S. Miller" , Jakub Kicinski , Russell King , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH net-next v3 13/20] net: dsa: qca8k: make rgmii delay configurable Date: Wed, 5 May 2021 00:29:07 +0200 Message-Id: <20210504222915.17206-13-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210504222915.17206-1-ansuelsmth@gmail.com> References: <20210504222915.17206-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC The legacy qsdk code used a different delay instead of the max value. Qsdk use 1 ps for rx and 2 ps for tx. Make these values configurable using the standard rx/tx-internal-delay-ps ethernet binding and apply qsdk values by default. The connected gmac doesn't add any delay so no additional delay is added to tx/rx. Signed-off-by: Ansuel Smith --- drivers/net/dsa/qca8k.c | 51 +++++++++++++++++++++++++++++++++++++++-- drivers/net/dsa/qca8k.h | 11 +++++---- 2 files changed, 55 insertions(+), 7 deletions(-) diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index 22334d416f53..cb9b44769e92 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -779,6 +779,47 @@ qca8k_setup_mdio_bus(struct qca8k_priv *priv) return 0; } +static int +qca8k_setup_of_rgmii_delay(struct qca8k_priv *priv) +{ + struct device_node *ports, *port; + u32 val; + + ports = of_get_child_by_name(priv->dev->of_node, "ports"); + if (!ports) + return -EINVAL; + + /* Assume only one port with rgmii-id mode */ + for_each_available_child_of_node(ports, port) { + if (!of_property_match_string(port, "phy-mode", "rgmii-id")) + continue; + + if (of_property_read_u32(port, "rx-internal-delay-ps", &val)) + val = 2; + + if (val > QCA8K_MAX_DELAY) { + dev_err(priv->dev, "rgmii rx delay is limited to more than 3ps, setting to the max value"); + priv->rgmii_rx_delay = 3; + } else { + priv->rgmii_rx_delay = val; + } + + if (of_property_read_u32(port, "rx-internal-delay-ps", &val)) + val = 1; + + if (val > QCA8K_MAX_DELAY) { + dev_err(priv->dev, "rgmii tx delay is limited to more than 3ps, setting to the max value"); + priv->rgmii_tx_delay = 3; + } else { + priv->rgmii_rx_delay = val; + } + } + + of_node_put(ports); + + return 0; +} + static int qca8k_setup(struct dsa_switch *ds) { @@ -808,6 +849,10 @@ qca8k_setup(struct dsa_switch *ds) if (ret) return ret; + ret = qca8k_setup_of_rgmii_delay(priv); + if (ret) + return ret; + /* Enable CPU Port */ ret = qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0, QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN); @@ -1018,8 +1063,10 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, */ qca8k_write(priv, reg, QCA8K_PORT_PAD_RGMII_EN | - QCA8K_PORT_PAD_RGMII_TX_DELAY(QCA8K_MAX_DELAY) | - QCA8K_PORT_PAD_RGMII_RX_DELAY(QCA8K_MAX_DELAY)); + QCA8K_PORT_PAD_RGMII_TX_DELAY(priv->rgmii_tx_delay) | + QCA8K_PORT_PAD_RGMII_RX_DELAY(priv->rgmii_rx_delay) | + QCA8K_PORT_PAD_RGMII_TX_DELAY_EN | + QCA8K_PORT_PAD_RGMII_RX_DELAY_EN); /* QCA8337 requires to set rgmii rx delay */ if (data->id == QCA8K_ID_QCA8337) qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL, diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h index 0b503f78bf92..80830bb42736 100644 --- a/drivers/net/dsa/qca8k.h +++ b/drivers/net/dsa/qca8k.h @@ -36,12 +36,11 @@ #define QCA8K_REG_PORT5_PAD_CTRL 0x008 #define QCA8K_REG_PORT6_PAD_CTRL 0x00c #define QCA8K_PORT_PAD_RGMII_EN BIT(26) -#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) \ - ((0x8 + (x & 0x3)) << 22) -#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) \ - ((0x10 + (x & 0x3)) << 20) -#define QCA8K_MAX_DELAY 3 +#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) ((x) << 22) +#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) ((x) << 20) +#define QCA8K_PORT_PAD_RGMII_TX_DELAY_EN BIT(25) #define QCA8K_PORT_PAD_RGMII_RX_DELAY_EN BIT(24) +#define QCA8K_MAX_DELAY 3 #define QCA8K_PORT_PAD_SGMII_EN BIT(7) #define QCA8K_REG_PWS 0x010 #define QCA8K_PWS_SERDES_AEN_DIS BIT(7) @@ -251,6 +250,8 @@ struct qca8k_match_data { struct qca8k_priv { u8 switch_revision; + u8 rgmii_tx_delay; + u8 rgmii_rx_delay; struct regmap *regmap; struct mii_bus *bus; struct ar8xxx_port_status port_sts[QCA8K_NUM_PORTS];