From patchwork Tue May 21 10:15:47 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: 13669217 X-Patchwork-Delegate: kuba@kernel.org Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (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 816F37CF34; Tue, 21 May 2024 10:18:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716286696; cv=none; b=tq3etrYyS3+KE3WL7dHofy6u/gtZbDgN/2iCirgBu28Jb3rs7uNjVu5MhGho/NKxtw92WnonmV9dy0vT0qfmQMcUAXxGoNbxSJEsTzVnlr2X1o+lQJARndz9L/mEJ19CO6Y/F/MC3Nce2Uq07Tq3dt1ekRk4dqw95ZNy8w+zKw4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716286696; c=relaxed/simple; bh=dyn0wnOs5ah6OzX/Bmsg49n3vC+8iuKjjPFZXueJA6I=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=J1xkSIs8pEjzcHBYWW0mfF8hbRnv4m6XW8duY5SE63Xy529JbWyjF60BCO9GmbJaIt0STkj1Hiy4rSwPhQFc4QgCzVkQUT5jcYFmdmKUQoR0nf9SaOXcuczbSZqKu7iDONtLo+EfbLwwusu5ZleqpYSctX8QGw/rQc8oyIuidQQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=ij3MtVTp; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="ij3MtVTp" X-UUID: 6c1af96c175b11efb92737409a0e9459-20240521 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=n6049CLmOykfsLJuEGhnBsULqwRkvRXGeSxXNY14rlc=; b=ij3MtVTpRkAWxtuEpUaMqnVSkjlsgOigQdgMa8Idp3lptAH43WfUOfKfGP045tqnCW38J/2UpIsMwH5+dj7OMr+G6stwn0+oK8jkGl/KRdDIgFBkHVNVzradAvOESayfLB86UvZirLEuj5ResC+zeDcJwj0uWt51kxTpLbPNTRQ=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.38,REQID:ce18e183-02bf-44ba-961a-e6ad899c057a,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:82c5f88,CLOUDID:c2d65cfc-ed05-4274-9204-014369d201e8,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: 6c1af96c175b11efb92737409a0e9459-20240521 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 573676641; Tue, 21 May 2024 18:18:09 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) 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; Tue, 21 May 2024 18:18:08 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 21 May 2024 18:18:08 +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 v4 4/5] net: phy: mediatek: Extend 1G TX/RX link pulse time Date: Tue, 21 May 2024 18:15:47 +0800 Message-ID: <20240521101548.9286-5-SkyLake.Huang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240521101548.9286-1-SkyLake.Huang@mediatek.com> References: <20240521101548.9286-1-SkyLake.Huang@mediatek.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N X-Patchwork-Delegate: kuba@kernel.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 v3: Refactor mtk_gphy_cl22_read_status() with genphy_read_status(). v4: 1. Change extend_an_new_lp_cnt_limit()'s return type and all return values 2. Refactor comments in extend_an_new_lp_cnt_limit() 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 | 66 ++++++++++++++++++++++++++ drivers/net/phy/mediatek/mtk.h | 16 +++++++ 4 files changed, 85 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 43547f4..8ec1699 100644 --- a/drivers/net/phy/mediatek/mtk-phy-lib.c +++ b/drivers/net/phy/mediatek/mtk-phy-lib.c @@ -106,6 +106,72 @@ int mtk_phy_write_page(struct phy_device *phydev, int page) } EXPORT_SYMBOL_GPL(mtk_phy_write_page); +static int extend_an_new_lp_cnt_limit(struct phy_device *phydev) +{ + int mmd_read_ret; + u32 reg_val; + int timeout; + + timeout = 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) + return mmd_read_ret; + + /* [When cable is plugged in] + * We expect final_speed_1000 will be set, which means this phy starts 1G link-up + * training. In this case, try to extend timeout period of auto downshift. + * [When cable is unplugged] + * We expect that reading MTK_PHY_FINAL_SPEED_1000 will time out. Do nothing but + * return. + */ + if (!timeout) { + tr_modify(phydev, 0x0, 0xf, 0x3c, AN_NEW_LP_CNT_LIMIT_MASK, + FIELD_PREP(AN_NEW_LP_CNT_LIMIT_MASK, 0xf)); + mdelay(1500); + + timeout = read_poll_timeout(tr_read, reg_val, + (reg_val & AN_STATE_MASK) != + (AN_STATE_TX_DISABLE << AN_STATE_SHIFT), + 10000, 1000000, false, phydev, + 0x0, 0xf, 0x2); + if (!timeout) { + 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)); + } else { + return -ETIMEDOUT; + } + } + + return 0; +} + +int mtk_gphy_cl22_read_status(struct phy_device *phydev) +{ + int ret; + + ret = genphy_read_status(phydev); + if (ret) + return ret; + + if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) { + ret = phy_read(phydev, MII_CTRL1000); + if ((ret & ADVERTISE_1000FULL) || (ret & ADVERTISE_1000HALF)) { + ret = extend_an_new_lp_cnt_limit(phydev); + if (ret < 0) + return ret; + } + } + + 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,