From patchwork Mon May 24 23:22:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Oltean X-Patchwork-Id: 12277187 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 17DC9C2B9F7 for ; Mon, 24 May 2021 23:22:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D42106135F for ; Mon, 24 May 2021 23:22:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229915AbhEXXYH (ORCPT ); Mon, 24 May 2021 19:24:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229668AbhEXXYC (ORCPT ); Mon, 24 May 2021 19:24:02 -0400 Received: from mail-ej1-x62b.google.com (mail-ej1-x62b.google.com [IPv6:2a00:1450:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C18EEC061574 for ; Mon, 24 May 2021 16:22:32 -0700 (PDT) Received: by mail-ej1-x62b.google.com with SMTP id i7so26456730ejc.5 for ; Mon, 24 May 2021 16:22:32 -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=JVCqEUjVazF1IKwMITcNDAYvDTu9khNkDACk0ywuDFU=; b=YTm0vyZ+oJ8dYlZDLiZtdakioNjdctKQ6Tqre+oSLdMJ3kfNsUrnR84MUsI3Iqfyny +7983GYm3ixjBP/I6h8cftCXQIgBVzM9HbiekjHnkdv62HCu2ItwCRAEMS+VLDGsZYd9 I5M/07PueMEqXOZzY3edUN1DM4eYc1PCSD0iSUwMJcjF+S8ohv+wRBlsx3b9WWWA/Ccw G8sqmNv1NfzYbG6TKIxmvIO0/ALW55UOTdJw2fXJboBXzYJaGVUqxtFMwZughvc+7zQR sobnxCEslwH/myMjHjMDJ/T7mKSYStdirP0dn++pNOjaRntTK9vdxbp4Pw9ORAlBp+id LrBA== 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=JVCqEUjVazF1IKwMITcNDAYvDTu9khNkDACk0ywuDFU=; b=liNveBTxyCOY8F+WboeI1zH63tMuDK0pPwch8s5YXgDP4bBp94/4nAMcg3pN4havFo bg3zUezYdmpQmsyQwzHqG7+gU3CuZdY9drVHVnQyeT7mvfYCqt+b/Xhk3A2QJW4CjnOT KOL1zzcKt1/m6rX8tRhVSsDvh0Prcryh8JXNJ5nDy99B68oOcQeP0iEQoINNR53BnhMA n/of9eEsMDGHLTozib1k9aDKjXoFWc00mY/22OQfCDtQS8Lxu35C3Pc4VfCEYWl4k8tP zyxqx2WJQyvi1rGUPIvwaF6727sWdUfj5Yfdd3Qm5NqZqaK0cnN0HsxhbekaC8DW1RLO Anaw== X-Gm-Message-State: AOAM530/henQA2aWw2ZSZh4C2SGgw4ZoEiNWsoVXZFWHEVQ3bPpVecjr dXXV4fs61RlxTBdIpfGux4bfweiTrJQ= X-Google-Smtp-Source: ABdhPJxaxi7WijUIC0DegqUvX3/4e9T0jEWymLiI6xy2F1rarMVmVgOGRBy+Db+e/qBBo866oGU41g== X-Received: by 2002:a17:907:75e9:: with SMTP id jz9mr25224416ejc.314.1621898551218; Mon, 24 May 2021 16:22:31 -0700 (PDT) Received: from localhost.localdomain ([188.26.52.84]) by smtp.gmail.com with ESMTPSA id di7sm9922746edb.34.2021.05.24.16.22.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 May 2021 16:22:31 -0700 (PDT) From: Vladimir Oltean To: Jakub Kicinski , "David S. Miller" , netdev@vger.kernel.org Cc: Florian Fainelli , Andrew Lunn , Vivien Didelot , Vladimir Oltean Subject: [PATCH net-next 03/13] net: dsa: sja1105: the 0x1F0000 SGMII "base address" is actually MDIO_MMD_VEND2 Date: Tue, 25 May 2021 02:22:04 +0300 Message-Id: <20210524232214.1378937-4-olteanv@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210524232214.1378937-1-olteanv@gmail.com> References: <20210524232214.1378937-1-olteanv@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Vladimir Oltean Looking at the SGMII PCS from SJA1110, which is accessed indirectly through a different base address as can be seen in the next patch, it appears odd that the address accessed through indirection still references the base address from the SJA1105S register map (first MDIO register is at 0x1f0000), when it could index the SGMII registers starting from zero. Except that the 0x1f0000 is not a base address at all, it seems. It is 0x1f << 16 | 0x0000, and 0x1f is coding for the vendor-specific MMD2. So, it turns out, the Synopsys PCS implements all its registers inside the vendor-specific MMDs 1 and 2 (0x1e and 0x1f). This explains why the PCS has no overlaps (for the other MMDs) with other register regions of the switch (because no other MMDs are implemented). Change the code to remove the SGMII "base address" and explicitly encode the MMD for reads/writes. This will become necessary for SJA1110 support. Signed-off-by: Vladimir Oltean --- drivers/net/dsa/sja1105/sja1105.h | 1 - drivers/net/dsa/sja1105/sja1105_main.c | 31 +++++++++++++------------- drivers/net/dsa/sja1105/sja1105_spi.c | 1 - 3 files changed, 16 insertions(+), 17 deletions(-) diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h index 2ec03917feb3..830ea5ca359f 100644 --- a/drivers/net/dsa/sja1105/sja1105.h +++ b/drivers/net/dsa/sja1105/sja1105.h @@ -48,7 +48,6 @@ struct sja1105_regs { u64 rgu; u64 vl_status; u64 config; - u64 sgmii; u64 rmii_pll1; u64 ptppinst; u64 ptppindur; diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c index 1a49cfce9611..292490a2ea0e 100644 --- a/drivers/net/dsa/sja1105/sja1105_main.c +++ b/drivers/net/dsa/sja1105/sja1105_main.c @@ -898,36 +898,34 @@ static int sja1105_parse_dt(struct sja1105_private *priv, return rc; } -static int sja1105_sgmii_read(struct sja1105_private *priv, int port, +static int sja1105_sgmii_read(struct sja1105_private *priv, int port, int mmd, int pcs_reg) { - const struct sja1105_regs *regs = priv->info->regs; + u64 addr = (mmd << 16) | pcs_reg; u32 val; int rc; if (port != SJA1105_SGMII_PORT) return -ENODEV; - rc = sja1105_xfer_u32(priv, SPI_READ, regs->sgmii + pcs_reg, - &val, NULL); + rc = sja1105_xfer_u32(priv, SPI_READ, addr, &val, NULL); if (rc < 0) return rc; return val; } -static int sja1105_sgmii_write(struct sja1105_private *priv, int port, +static int sja1105_sgmii_write(struct sja1105_private *priv, int port, int mmd, int pcs_reg, u16 pcs_val) { - const struct sja1105_regs *regs = priv->info->regs; + u64 addr = (mmd << 16) | pcs_reg; u32 val = pcs_val; int rc; if (port != SJA1105_SGMII_PORT) return -ENODEV; - rc = sja1105_xfer_u32(priv, SPI_WRITE, regs->sgmii + pcs_reg, - &val, NULL); + rc = sja1105_xfer_u32(priv, SPI_WRITE, addr, &val, NULL); if (rc < 0) return rc; @@ -943,24 +941,24 @@ static void sja1105_sgmii_pcs_config(struct sja1105_private *priv, int port, * stop the clock during LPI mode, make the MAC reconfigure * autonomously after PCS autoneg is done, flush the internal FIFOs. */ - sja1105_sgmii_write(priv, port, SJA1105_DC1, + sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, SJA1105_DC1, SJA1105_DC1_EN_VSMMD1 | SJA1105_DC1_CLOCK_STOP_EN | SJA1105_DC1_MAC_AUTO_SW | SJA1105_DC1_INIT); /* DIGITAL_CONTROL_2: No polarity inversion for TX and RX lanes */ - sja1105_sgmii_write(priv, port, SJA1105_DC2, + sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, SJA1105_DC2, SJA1105_DC2_TX_POL_INV_DISABLE); /* AUTONEG_CONTROL: Use SGMII autoneg */ if (an_master) ac |= SJA1105_AC_PHY_MODE | SJA1105_AC_SGMII_LINK; - sja1105_sgmii_write(priv, port, SJA1105_AC, ac); + sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, SJA1105_AC, ac); /* BASIC_CONTROL: enable in-band AN now, if requested. Otherwise, * sja1105_sgmii_pcs_force_speed must be called later for the link * to become operational. */ if (an_enabled) - sja1105_sgmii_write(priv, port, MII_BMCR, + sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, MDIO_CTRL1, BMCR_ANENABLE | BMCR_ANRESTART); } @@ -983,7 +981,8 @@ static void sja1105_sgmii_pcs_force_speed(struct sja1105_private *priv, dev_err(priv->ds->dev, "Invalid speed %d\n", speed); return; } - sja1105_sgmii_write(priv, port, MII_BMCR, pcs_speed | BMCR_FULLDPLX); + sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, MDIO_CTRL1, + pcs_speed | BMCR_FULLDPLX); } /* Convert link speed from SJA1105 to ethtool encoding */ @@ -1201,7 +1200,7 @@ static int sja1105_mac_pcs_get_state(struct dsa_switch *ds, int port, int ais; /* Read the vendor-specific AUTONEG_INTR_STATUS register */ - ais = sja1105_sgmii_read(priv, port, SJA1105_AIS); + ais = sja1105_sgmii_read(priv, port, MDIO_MMD_VEND2, SJA1105_AIS); if (ais < 0) return ais; @@ -1905,7 +1904,9 @@ int sja1105_static_config_reload(struct sja1105_private *priv, mac[i].speed = SJA1105_SPEED_AUTO; if (sja1105_supports_sgmii(priv, i)) - bmcr[i] = sja1105_sgmii_read(priv, i, MII_BMCR); + bmcr[i] = sja1105_sgmii_read(priv, i, + MDIO_MMD_VEND2, + MDIO_CTRL1); } /* No PTP operations can run right now */ diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c b/drivers/net/dsa/sja1105/sja1105_spi.c index d0bc6cf90bfd..615e0906b1fa 100644 --- a/drivers/net/dsa/sja1105/sja1105_spi.c +++ b/drivers/net/dsa/sja1105/sja1105_spi.c @@ -440,7 +440,6 @@ static struct sja1105_regs sja1105pqrs_regs = { .pad_mii_tx = {0x100800, 0x100802, 0x100804, 0x100806, 0x100808}, .pad_mii_rx = {0x100801, 0x100803, 0x100805, 0x100807, 0x100809}, .pad_mii_id = {0x100810, 0x100811, 0x100812, 0x100813, 0x100814}, - .sgmii = 0x1F0000, .rmii_pll1 = 0x10000A, .cgu_idiv = {0x10000B, 0x10000C, 0x10000D, 0x10000E, 0x10000F}, .stats[MAC] = {0x200, 0x202, 0x204, 0x206, 0x208},