From patchwork Fri Jun 21 12:20:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sky Huang X-Patchwork-Id: 13707521 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 810CAC27C4F for ; Fri, 21 Jun 2024 12:28:19 +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=x/wa8z0oP0zNaG3GE5EFppENbM7/5Mkzd1EZjAayPUk=; b=JFGaCHyYuo+53yIlTt3Gkn6ZdY qsjzqW+MfKHcberH9phOmcxdyBprneY0UHX818dQAA4N0cOuFtBXRanLdwyemdjBd0vXKC94DMlBD ciUOGASHeljgz6q2taaqc8oKmhKvWoWjufeEPISwFj0koIN355Fj7dvWOJJC1gzoVOly4E8YTFOuO c9e1iHwVA34wIAswvl08dGAH46W0K1XPiAXvkWN1AuJ3NphskeF8gBgFZiJY1eobJTmbhPwssiGCr F2jHdd4XDi4mqXxRiEbhCBVYVsGG+xFqQVEJahGotO3YydjF0nVwqwyJW8hVJrCF174oSJmAhSBRE hwCJ0v4w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sKdN7-000000097tl-1rir; Fri, 21 Jun 2024 12:28:05 +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 1sKdN0-000000097q8-3MdB; Fri, 21 Jun 2024 12:28:00 +0000 X-UUID: b04857842fc911ef9daba96ee3f3cc8c-20240621 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=x/wa8z0oP0zNaG3GE5EFppENbM7/5Mkzd1EZjAayPUk=; b=ELFfIQjNGQvu0K25t/9EKQRbfY+u5W0urctte2qcOGqzW84gWUo83RV/qDddFcn8nykOxDF33lToiCPWuVh6SmjcLNSf9l8IhJU7HNZyWbRUpC4ffaXJUQFyh5n9bUXVgJGwuEt3QMyxEDfs5IpZjEMxbtrOxVP+xdw/UEdXKx4=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.39,REQID:c6fd541e-247a-40ee-ac18-eac57c9c89c3,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:393d96e,CLOUDID:c5c4df88-8d4f-477b-89d2-1e3bdbef96d1,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,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: b04857842fc911ef9daba96ee3f3cc8c-20240621 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 911197113; Fri, 21 Jun 2024 05:27:56 -0700 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; Fri, 21 Jun 2024 20:27:54 +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; Fri, 21 Jun 2024 20:27:54 +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 v8 10/13] net: phy: mediatek: Extend 1G TX/RX link pulse time Date: Fri, 21 Jun 2024 20:20:42 +0800 Message-ID: <20240621122045.30732-11-SkyLake.Huang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240621122045.30732-1-SkyLake.Huang@mediatek.com> References: <20240621122045.30732-1-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-20240621_052758_921106_B566DD22 X-CRM114-Status: GOOD ( 20.96 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=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 Reviewed-by: Andrew Lunn --- Changes in v8: - Replace tr_modify with mtk_tr_modify and fix alignment. --- drivers/net/phy/mediatek/mtk-ge-soc.c | 2 + drivers/net/phy/mediatek/mtk-ge.c | 5 +- drivers/net/phy/mediatek/mtk-phy-lib.c | 92 ++++++++++++++++++++++++++ drivers/net/phy/mediatek/mtk.h | 21 ++++++ 4 files changed, 116 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/mediatek/mtk-ge-soc.c b/drivers/net/phy/mediatek/mtk-ge-soc.c index 1dcdf1f..59c815e 100644 --- a/drivers/net/phy/mediatek/mtk-ge-soc.c +++ b/drivers/net/phy/mediatek/mtk-ge-soc.c @@ -1401,6 +1401,7 @@ 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, @@ -1418,6 +1419,7 @@ 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 7d5420f..ea85c94 100644 --- a/drivers/net/phy/mediatek/mtk-ge.c +++ b/drivers/net/phy/mediatek/mtk-ge.c @@ -8,10 +8,6 @@ #define MTK_GPHY_ID_MT7530 0x03a29412 #define MTK_GPHY_ID_MT7531 0x03a29441 -#define MTK_PHY_PAGE_EXTENDED_1 0x0001 -#define MTK_PHY_AUX_CTRL_AND_STATUS 0x14 -#define MTK_PHY_ENABLE_DOWNSHIFT BIT(4) - #define MTK_PHY_PAGE_EXTENDED_2 0x0002 #define MTK_PHY_PAGE_EXTENDED_3 0x0003 #define MTK_PHY_RG_LPI_PCS_DSP_CTRL_REG11 0x11 @@ -220,6 +216,7 @@ 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 e9bb36b..8fe1395 100644 --- a/drivers/net/phy/mediatek/mtk-phy-lib.c +++ b/drivers/net/phy/mediatek/mtk-phy-lib.c @@ -109,6 +109,98 @@ int mtk_phy_write_page(struct phy_device *phydev, int page) } EXPORT_SYMBOL_GPL(mtk_phy_write_page); +/* This function deals with the case that 1G AN starts but isn't completed. We + * set AN_NEW_LP_CNT_LIMIT with different values time after time to let our + * 1G->100Mbps hardware automatic downshift to fit more partner devices. + */ +static int extend_an_new_lp_cnt_limit(struct phy_device *phydev) +{ + int mmd_read_ret; + u32 reg_val; + int timeout; + + /* According to table 28-9 & Figure 28-18 in IEEE 802.3, + * link_fail_inhibit_timer of 10/100/1000 Mbps devices ranges from 750 + * to "1000ms". Once MTK_PHY_FINAL_SPEED_1000 is set, it means that we + * enter "FLP LINK GOOD CHECK" state, link_fail_inhibit_timer starts and + * this PHY's 1G training starts. If 1G training never starts, we do + * nothing but leave. + */ + 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; + + if (!timeout) { + /* Once we found MTK_PHY_FINAL_SPEED_1000 is set, no matter 1G + * AN is completed or not, we'll set AN_NEW_LP_CNT_LIMIT again + * and again. + */ + mtk_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(mtk_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); + mtk_tr_modify(phydev, 0x0, 0xf, 0x3c, + AN_NEW_LP_CNT_LIMIT_MASK, + FIELD_PREP(AN_NEW_LP_CNT_LIMIT_MASK, + 0x8)); + mdelay(500); + mtk_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_paged(phydev, MTK_PHY_PAGE_EXTENDED_1, + MTK_PHY_AUX_CTRL_AND_STATUS); + if (ret < 0) + return ret; + + /* Once LP_DETECTED is set, it means that"ability_match" in + * IEEE 802.3 Figure 28-18 is set. This happens after we plug in + * cable. Also, LP_DETECTED will be cleared after AN complete. + */ + if (!FIELD_GET(MTK_PHY_LP_DETECTED_MASK, ret)) + return 0; + + ret = phy_read(phydev, MII_CTRL1000); + if (ret & (ADVERTISE_1000FULL | 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 e443151..a1bc318 100644 --- a/drivers/net/phy/mediatek/mtk.h +++ b/drivers/net/phy/mediatek/mtk.h @@ -10,8 +10,28 @@ #define MTK_EXT_PAGE_ACCESS 0x1f #define MTK_PHY_PAGE_STANDARD 0x0000 +#define MTK_PHY_PAGE_EXTENDED_1 0x0001 +#define MTK_PHY_AUX_CTRL_AND_STATUS 0x14 +/* suprv_media_select_RefClk */ +#define MTK_PHY_LP_DETECTED_MASK GENMASK(7, 6) +#define MTK_PHY_ENABLE_DOWNSHIFT BIT(4) + #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 @@ -78,6 +98,7 @@ void __mtk_tr_clr_bits(struct phy_device *phydev, u8 ch_addr, u8 node_addr, 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);