From patchwork Mon Sep 11 06:02:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: MD Danish Anwar X-Patchwork-Id: 13378803 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 410313D76 for ; Mon, 11 Sep 2023 06:03:31 +0000 (UTC) Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68C1C1B8; Sun, 10 Sep 2023 23:02:48 -0700 (PDT) Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 38B62MV3032449; Mon, 11 Sep 2023 01:02:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1694412142; bh=PqCk36zd1ArgBmbJorVXLrlQP4/2RI28rsxTy1PC71k=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=ZrXZQ0XY0uOvkyws4MC9H9YpJjPr53n2pow6E4U5CR/yZt6cb9Cf5c1rC7p3N1EV3 enDQJyeeUOTTjGLNEwpvrhtiLq7O9HXToN1jF64QE+Je7mHiyl/JyR3uI6UaxZudjZ smZmVr2HQhS5SzjcDHIKlnFeHFFzkhqcMiujNutY= Received: from DFLE115.ent.ti.com (dfle115.ent.ti.com [10.64.6.36]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 38B62MqY013088 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 11 Sep 2023 01:02:22 -0500 Received: from DFLE104.ent.ti.com (10.64.6.25) by DFLE115.ent.ti.com (10.64.6.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Mon, 11 Sep 2023 01:02:22 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Mon, 11 Sep 2023 01:02:22 -0500 Received: from lelv0854.itg.ti.com (lelv0854.itg.ti.com [10.181.64.140]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 38B62M5u037605; Mon, 11 Sep 2023 01:02:22 -0500 Received: from localhost (danish-tpc.dhcp.ti.com [10.24.69.199]) by lelv0854.itg.ti.com (8.14.7/8.14.7) with ESMTP id 38B62LkV000534; Mon, 11 Sep 2023 01:02:22 -0500 From: MD Danish Anwar To: Andrew Lunn , Roger Quadros , MD Danish Anwar , Conor Dooley , Krzysztof Kozlowski , Rob Herring , Paolo Abeni , Jakub Kicinski , Eric Dumazet , "David S. Miller" , Vignesh Raghavendra , Simon Horman CC: , , , , , Roger Quadros Subject: [PATCH net-next v2 2/2] net: ti: icssg-prueth: Add support for half duplex operation Date: Mon, 11 Sep 2023 11:32:00 +0530 Message-ID: <20230911060200.2164771-3-danishanwar@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230911060200.2164771-1-danishanwar@ti.com> References: <20230911060200.2164771-1-danishanwar@ti.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org This patch adds support for half duplex operation at 10M and 100M link speeds for AM654x/AM64x devices. - Driver configures rand_seed, a random number, in DMEM HD_RAND_SEED_OFFSET field, which will be used by firmware for Back off time calculation. - Driver informs FW about half duplex link operation in DMEM PORT_LINK_SPEED_OFFSET field by setting bit 7 for 10/100M HD. Hence, the half duplex operation depends on board design the "ti,half-duplex-capable" property has to be enabled for ICSS-G ports if HW is capable to perform half duplex. Reviewed-by: Andrew Lunn Reviewed-by: Roger Quadros Signed-off-by: MD Danish Anwar --- drivers/net/ethernet/ti/icssg/icssg_config.c | 14 ++++++++++++++ drivers/net/ethernet/ti/icssg/icssg_prueth.c | 17 +++++++++++++++-- drivers/net/ethernet/ti/icssg/icssg_prueth.h | 2 ++ 3 files changed, 31 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/ti/icssg/icssg_config.c b/drivers/net/ethernet/ti/icssg/icssg_config.c index 933b84666574..c1da70f247d4 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_config.c +++ b/drivers/net/ethernet/ti/icssg/icssg_config.c @@ -433,6 +433,17 @@ int emac_set_port_state(struct prueth_emac *emac, return ret; } +void icssg_config_half_duplex(struct prueth_emac *emac) +{ + u32 val; + + if (!emac->half_duplex) + return; + + val = get_random_u32(); + writel(val, emac->dram.va + HD_RAND_SEED_OFFSET); +} + void icssg_config_set_speed(struct prueth_emac *emac) { u8 fw_speed; @@ -453,5 +464,8 @@ void icssg_config_set_speed(struct prueth_emac *emac) return; } + if (emac->duplex == DUPLEX_HALF) + fw_speed |= FW_LINK_SPEED_HD; + writeb(fw_speed, emac->dram.va + PORT_LINK_SPEED_OFFSET); } diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index 410612f43cbd..e736652567cd 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -1029,6 +1029,8 @@ static void emac_adjust_link(struct net_device *ndev) * values */ if (emac->link) { + if (emac->duplex == DUPLEX_HALF) + icssg_config_half_duplex(emac); /* Set the RGMII cfg for gig en and full duplex */ icssg_update_rgmii_cfg(prueth->miig_rt, emac); @@ -1147,9 +1149,13 @@ static int emac_phy_connect(struct prueth_emac *emac) return -ENODEV; } + if (!emac->half_duplex) { + dev_dbg(prueth->dev, "half duplex mode is not supported\n"); + phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT); + phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT); + } + /* remove unsupported modes */ - phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT); - phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Pause_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT); @@ -2113,6 +2119,10 @@ static int prueth_probe(struct platform_device *pdev) eth0_node->name); goto exit_iep; } + + if (of_find_property(eth0_node, "ti,half-duplex-capable", NULL)) + prueth->emac[PRUETH_MAC0]->half_duplex = 1; + prueth->emac[PRUETH_MAC0]->iep = prueth->iep0; } @@ -2124,6 +2134,9 @@ static int prueth_probe(struct platform_device *pdev) goto netdev_exit; } + if (of_find_property(eth1_node, "ti,half-duplex-capable", NULL)) + prueth->emac[PRUETH_MAC1]->half_duplex = 1; + prueth->emac[PRUETH_MAC1]->iep = prueth->iep0; } diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h index 3fe80a8758d3..8b6d6b497010 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h @@ -145,6 +145,7 @@ struct prueth_emac { struct icss_iep *iep; unsigned int rx_ts_enabled : 1; unsigned int tx_ts_enabled : 1; + unsigned int half_duplex : 1; /* DMA related */ struct prueth_tx_chn tx_chns[PRUETH_MAX_TX_QUEUES]; @@ -271,6 +272,7 @@ int icssg_config(struct prueth *prueth, struct prueth_emac *emac, int emac_set_port_state(struct prueth_emac *emac, enum icssg_port_state_cmd state); void icssg_config_set_speed(struct prueth_emac *emac); +void icssg_config_half_duplex(struct prueth_emac *emac); /* Buffer queue helpers */ int icssg_queue_pop(struct prueth *prueth, u8 queue);