From patchwork Mon Apr 12 08:38:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 419966 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 9098AC43600 for ; Mon, 12 Apr 2021 09:05:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F315613CA for ; Mon, 12 Apr 2021 09:05:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238037AbhDLJGP (ORCPT ); Mon, 12 Apr 2021 05:06:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:54638 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238988AbhDLJCR (ORCPT ); Mon, 12 Apr 2021 05:02:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C4A5E61220; Mon, 12 Apr 2021 09:00:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618218052; bh=hVbYCz/9WfYrFQmnE77euXnoc9pDzhUZ0wwqOUp4IAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=w4H/0jHryT8UCFQxDHQtYHibNpRROEf1n3gki+kr9vFf499uh82R6rdByPGqydm08 Cm5FsRsZVTH6r2QyUvvVlbNRKWLpBQK7PSUnxE70mnNQaBdKEMb8jnpndG2YFX0aSX m0qQvYJtc/VxngT8SAv+WUX8LPjEtLqTZkJ4eyOE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hauke Mehrtens , Martin Blumenstingl , Florian Fainelli , "David S. Miller" Subject: [PATCH 5.11 018/210] net: dsa: lantiq_gswip: Configure all remaining GSWIP_MII_CFG bits Date: Mon, 12 Apr 2021 10:38:43 +0200 Message-Id: <20210412084016.614703345@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210412084016.009884719@linuxfoundation.org> References: <20210412084016.009884719@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Martin Blumenstingl commit 4b5923249b8fa427943b50b8f35265176472be38 upstream. There are a few more bits in the GSWIP_MII_CFG register for which we did rely on the boot-loader (or the hardware defaults) to set them up properly. For some external RMII PHYs we need to select the GSWIP_MII_CFG_RMII_CLK bit and also we should un-set it for non-RMII PHYs. The GSWIP_MII_CFG_RMII_CLK bit is ignored for other PHY connection modes. The GSWIP IP also supports in-band auto-negotiation for RGMII PHYs when the GSWIP_MII_CFG_RGMII_IBS bit is set. Clear this bit always as there's no known hardware which uses this (so it is not tested yet). Clear the xMII isolation bit when set at initialization time if it was previously set by the bootloader. Not doing so could lead to no traffic (neither RX nor TX) on a port with this bit set. While here, also add the GSWIP_MII_CFG_RESET bit. We don't need to manage it because this bit is self-clearning when set. We still add it here to get a better overview of the GSWIP_MII_CFG register. Fixes: 14fceff4771e51 ("net: dsa: Add Lantiq / Intel DSA driver for vrx200") Cc: stable@vger.kernel.org Suggested-by: Hauke Mehrtens Acked-by: Hauke Mehrtens Signed-off-by: Martin Blumenstingl Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/dsa/lantiq_gswip.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) --- a/drivers/net/dsa/lantiq_gswip.c +++ b/drivers/net/dsa/lantiq_gswip.c @@ -93,8 +93,12 @@ /* GSWIP MII Registers */ #define GSWIP_MII_CFGp(p) (0x2 * (p)) +#define GSWIP_MII_CFG_RESET BIT(15) #define GSWIP_MII_CFG_EN BIT(14) +#define GSWIP_MII_CFG_ISOLATE BIT(13) #define GSWIP_MII_CFG_LDCLKDIS BIT(12) +#define GSWIP_MII_CFG_RGMII_IBS BIT(8) +#define GSWIP_MII_CFG_RMII_CLK BIT(7) #define GSWIP_MII_CFG_MODE_MIIP 0x0 #define GSWIP_MII_CFG_MODE_MIIM 0x1 #define GSWIP_MII_CFG_MODE_RMIIP 0x2 @@ -833,9 +837,11 @@ static int gswip_setup(struct dsa_switch /* Configure the MDIO Clock 2.5 MHz */ gswip_mdio_mask(priv, 0xff, 0x09, GSWIP_MDIO_MDC_CFG1); - /* Disable the xMII link */ + /* Disable the xMII interface and clear it's isolation bit */ for (i = 0; i < priv->hw_info->max_ports; i++) - gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_EN, 0, i); + gswip_mii_mask_cfg(priv, + GSWIP_MII_CFG_EN | GSWIP_MII_CFG_ISOLATE, + 0, i); /* enable special tag insertion on cpu port */ gswip_switch_mask(priv, 0, GSWIP_FDMA_PCTRL_STEN, @@ -1611,6 +1617,9 @@ static void gswip_phylink_mac_config(str break; case PHY_INTERFACE_MODE_RMII: miicfg |= GSWIP_MII_CFG_MODE_RMIIM; + + /* Configure the RMII clock as output: */ + miicfg |= GSWIP_MII_CFG_RMII_CLK; break; case PHY_INTERFACE_MODE_RGMII: case PHY_INTERFACE_MODE_RGMII_ID: @@ -1623,7 +1632,11 @@ static void gswip_phylink_mac_config(str "Unsupported interface: %d\n", state->interface); return; } - gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_MODE_MASK, miicfg, port); + + gswip_mii_mask_cfg(priv, + GSWIP_MII_CFG_MODE_MASK | GSWIP_MII_CFG_RMII_CLK | + GSWIP_MII_CFG_RGMII_IBS | GSWIP_MII_CFG_LDCLKDIS, + miicfg, port); switch (state->interface) { case PHY_INTERFACE_MODE_RGMII_ID: