From patchwork Fri May 17 10:29:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?U2t5TGFrZSBIdWFuZyAo6buD5ZWf5r6kKQ==?= X-Patchwork-Id: 13666868 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 DFDF0C04FFE for ; Fri, 17 May 2024 10:51:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zotP/X0kJr5B6g+bKMaXNDskzCSlvgU0qbm1yBlS+94=; b=vAZCFSib4LipXx3lkiSzfQet4Y jg52Y+c4BNehenZicU8cih6Jok8IPqLQgnWYv7EBTN83u4U76zilwH2+uN9XS1Yn2fszj+371y5ex OA6QRKgGk+5NvgBoWtsNkkbDEv65eFbssA2Ok2GV5jPIpuxXBgnZc2H2LfuzRNSnKtJ7AnHewkPYx qaMM1K1RBj7UeLfqoJ/0w7057qNPv2aiidwTqeNW34cQ3N1zSrwoaC7+2AG9h56oMBhUuK/NrePDs 7JJtzAcSpgSpYwBirmD5pMaps3N6nilhJI/erWuMNIfeaggBPgleRyFqtHGH/KiEY2s/FQmGSsqrO 15pIaW/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7vBl-00000007ZNi-1Q2E; Fri, 17 May 2024 10:51:49 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7vBi-00000007ZMy-1KqP; Fri, 17 May 2024 10:51:47 +0000 X-UUID: 70d98018143b11efa8f1cd58ee6c2400-20240517 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=zotP/X0kJr5B6g+bKMaXNDskzCSlvgU0qbm1yBlS+94=; b=SF2xGnzm6UZjk4Yyt95CdUFt8lxdjilELwPFzyzZef6sdnkR+KRQpIuzPhLo74EmvatTOe2quZOk0nWl3zUM7eZvYnjc7ZEUjM3Gme7P04zYbjyXt4AC6RclqX3gwC5aBSoXhxce2q7miFEjlHQv+5qkXHT/XatVxJBRK1rmiKI=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.38,REQID:58d5414a-0dd3-4853-904d-5fd17e5d0a86,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:82c5f88,CLOUDID:85c9e292-e2c0-40b0-a8fe-7c7e47299109,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1, SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 70d98018143b11efa8f1cd58ee6c2400-20240517 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1613101396; Fri, 17 May 2024 03:51:40 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 17 May 2024 18:30:39 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 17 May 2024 18:30:39 +0800 From: Sky Huang To: Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Daniel Golle , Qingfang Deng , SkyLake Huang , Matthias Brugger , AngeloGioacchino Del Regno , , , , CC: Steven Liu , SkyLake.Huang Subject: [PATCH net-next v2 4/5] net: phy: mediatek: Extend 1G TX/RX link pulse time Date: Fri, 17 May 2024 18:29:07 +0800 Message-ID: <20240517102908.12079-5-SkyLake.Huang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240517102908.12079-1-SkyLake.Huang@mediatek.com> References: <20240517102908.12079-1-SkyLake.Huang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240517_035146_466384_F0726136 X-CRM114-Status: GOOD ( 22.47 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: "SkyLake.Huang" We observe that some 10G devices' (mostly Marvell's chips inside) 1G training time violates specification, which may last 2230ms and affect later TX/RX link pulse time. This will invalidate MediaTek series gigabit Ethernet PHYs' hardware auto downshift mechanism. Without this patch, if someone is trying to use "4-wire" cable to connect above devices, MediaTek' gigabit Ethernet PHYs may fail to downshift to 100Mbps. (If partner 10G devices' downshift mechanism stops at 1G) This patch extends our 1G TX/RX link pulse time so that we can still link up with those 10G devices. Tested device: - Netgear GS110EMX's 10G port (Marvell 88X3340P) - QNAP QSW-M408-4C Signed-off-by: SkyLake.Huang --- drivers/net/phy/mediatek/mtk-ge-soc.c | 2 + drivers/net/phy/mediatek/mtk-ge.c | 1 + drivers/net/phy/mediatek/mtk-phy-lib.c | 90 ++++++++++++++++++++++++++ drivers/net/phy/mediatek/mtk.h | 16 +++++ 4 files changed, 109 insertions(+) diff --git a/drivers/net/phy/mediatek/mtk-ge-soc.c b/drivers/net/phy/mediatek/mtk-ge-soc.c index 8f23137..62424d4 100644 --- a/drivers/net/phy/mediatek/mtk-ge-soc.c +++ b/drivers/net/phy/mediatek/mtk-ge-soc.c @@ -1339,6 +1339,7 @@ static struct phy_driver mtk_socphy_driver[] = { PHY_ID_MATCH_EXACT(MTK_GPHY_ID_MT7981), .name = "MediaTek MT7981 PHY", .config_init = mt798x_phy_config_init, + .read_status = mtk_gphy_cl22_read_status, .config_intr = genphy_no_config_intr, .handle_interrupt = genphy_handle_interrupt_no_ack, .probe = mt7981_phy_probe, @@ -1356,6 +1357,7 @@ static struct phy_driver mtk_socphy_driver[] = { PHY_ID_MATCH_EXACT(MTK_GPHY_ID_MT7988), .name = "MediaTek MT7988 PHY", .config_init = mt798x_phy_config_init, + .read_status = mtk_gphy_cl22_read_status, .config_intr = genphy_no_config_intr, .handle_interrupt = genphy_handle_interrupt_no_ack, .probe = mt7988_phy_probe, diff --git a/drivers/net/phy/mediatek/mtk-ge.c b/drivers/net/phy/mediatek/mtk-ge.c index 5c0226d..c832c90 100644 --- a/drivers/net/phy/mediatek/mtk-ge.c +++ b/drivers/net/phy/mediatek/mtk-ge.c @@ -211,6 +211,7 @@ static struct phy_driver mtk_gephy_driver[] = { .name = "MediaTek MT7531 PHY", .probe = mt7531_phy_probe, .config_init = mt7531_phy_config_init, + .read_status = mtk_gphy_cl22_read_status, /* Interrupts are handled by the switch, not the PHY * itself. */ diff --git a/drivers/net/phy/mediatek/mtk-phy-lib.c b/drivers/net/phy/mediatek/mtk-phy-lib.c index 39bfefe..9e302c5 100644 --- a/drivers/net/phy/mediatek/mtk-phy-lib.c +++ b/drivers/net/phy/mediatek/mtk-phy-lib.c @@ -106,6 +106,96 @@ int mtk_phy_write_page(struct phy_device *phydev, int page) } EXPORT_SYMBOL_GPL(mtk_phy_write_page); +static void extend_an_new_lp_cnt_limit(struct phy_device *phydev) +{ + int mmd_read_ret; + int ret; + u32 reg_val; + + ret = read_poll_timeout(mmd_read_ret = phy_read_mmd, reg_val, + (mmd_read_ret < 0) || reg_val & MTK_PHY_FINAL_SPEED_1000, + 10000, 1000000, false, phydev, + MDIO_MMD_VEND1, MTK_PHY_LINK_STATUS_MISC); + if (mmd_read_ret < 0) + ret = mmd_read_ret; + /* If final_speed_1000 is raised, try to extend timeout period + * of auto downshift. + */ + if (!ret) { + tr_modify(phydev, 0x0, 0xf, 0x3c, AN_NEW_LP_CNT_LIMIT_MASK, + FIELD_PREP(AN_NEW_LP_CNT_LIMIT_MASK, 0xf)); + mdelay(1500); + + ret = read_poll_timeout(mmd_read_ret = tr_read, reg_val, + (mmd_read_ret < 0) || + (reg_val & AN_STATE_MASK) != + (AN_STATE_TX_DISABLE << AN_STATE_SHIFT), + 10000, 1000000, false, phydev, + 0x0, 0xf, 0x2); + + if (mmd_read_ret < 0) + ret = mmd_read_ret; + + if (!ret) { + mdelay(625); + tr_modify(phydev, 0x0, 0xf, 0x3c, AN_NEW_LP_CNT_LIMIT_MASK, + FIELD_PREP(AN_NEW_LP_CNT_LIMIT_MASK, 0x8)); + mdelay(500); + tr_modify(phydev, 0x0, 0xf, 0x3c, AN_NEW_LP_CNT_LIMIT_MASK, + FIELD_PREP(AN_NEW_LP_CNT_LIMIT_MASK, 0xf)); + } + } +} + +int mtk_gphy_cl22_read_status(struct phy_device *phydev) +{ + int err, old_link = phydev->link; + int mii_ctrl; + + /* Update the link, but return if there was an error */ + err = genphy_update_link(phydev); + if (err) + return err; + + /* why bother the PHY if nothing can have changed */ + if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) + return 0; + + phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; + phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; + phydev->speed = SPEED_UNKNOWN; + phydev->duplex = DUPLEX_UNKNOWN; + phydev->pause = 0; + phydev->asym_pause = 0; + + if (phydev->is_gigabit_capable) { + err = genphy_read_master_slave(phydev); + if (err < 0) + return err; + } + + err = genphy_read_lpa(phydev); + if (err < 0) + return err; + + if (phydev->autoneg == AUTONEG_ENABLE) { + if (phydev->autoneg_complete) { + phy_resolve_aneg_linkmode(phydev); + } else { + mii_ctrl = phy_read(phydev, MII_CTRL1000); + if ((mii_ctrl & ADVERTISE_1000FULL) || (mii_ctrl & ADVERTISE_1000HALF)) + extend_an_new_lp_cnt_limit(phydev); + } + } else if (phydev->autoneg == AUTONEG_DISABLE) { + err = genphy_read_status_fixed(phydev); + if (err < 0) + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mtk_gphy_cl22_read_status); + int mtk_phy_led_hw_is_supported(struct phy_device *phydev, u8 index, unsigned long rules, unsigned long supported_triggers) { diff --git a/drivers/net/phy/mediatek/mtk.h b/drivers/net/phy/mediatek/mtk.h index 10ee9be..32fa3f1 100644 --- a/drivers/net/phy/mediatek/mtk.h +++ b/drivers/net/phy/mediatek/mtk.h @@ -12,6 +12,20 @@ #define MTK_PHY_PAGE_STANDARD 0x0000 #define MTK_PHY_PAGE_EXTENDED_52B5 0x52b5 +/* Registers on Token Ring debug nodes */ +/* ch_addr = 0x0, node_addr = 0xf, data_addr = 0x2 */ +#define AN_STATE_MASK GENMASK(22, 19) +#define AN_STATE_SHIFT 19 +#define AN_STATE_TX_DISABLE 1 + +/* ch_addr = 0x0, node_addr = 0xf, data_addr = 0x3c */ +#define AN_NEW_LP_CNT_LIMIT_MASK GENMASK(23, 20) +#define AUTO_NP_10XEN BIT(6) + +/* Registers on MDIO_MMD_VEND1 */ +#define MTK_PHY_LINK_STATUS_MISC (0xa2) +#define MTK_PHY_FINAL_SPEED_1000 BIT(3) + /* Registers on MDIO_MMD_VEND2 */ #define MTK_PHY_LED0_ON_CTRL 0x24 #define MTK_PHY_LED1_ON_CTRL 0x26 @@ -75,6 +89,8 @@ void __tr_clr_bits(struct phy_device *phydev, u8 ch_addr, u8 node_addr, u8 data_ int mtk_phy_read_page(struct phy_device *phydev); int mtk_phy_write_page(struct phy_device *phydev, int page); +int mtk_gphy_cl22_read_status(struct phy_device *phydev); + int mtk_phy_led_hw_is_supported(struct phy_device *phydev, u8 index, unsigned long rules, unsigned long supported_triggers); int mtk_phy_led_hw_ctrl_set(struct phy_device *phydev, u8 index, unsigned long rules,