From patchwork Tue Dec 12 03:46:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 13488493 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 BE744C4167D for ; Tue, 12 Dec 2023 03:47:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YJNXiDa4kghghYPARh7KoqZrfOYWLAJ0KDJ2p8C4Wy4=; b=L6luliptrtXK5W tF/hPWoC84S7gu5bEtAQuDqB4d+9DNSoBl4newPeuwQ+Y9qBZOsUqiZGlv4cw2C0NAI9p99CePImp aUn5cee1dDd/vlGxppo1xSOiIMC32dnuhs37zjQ7ywaI8Xdv3Qz7lP79A5EgE0k/o7ma+Hlr2S+/S Fn+Xez39gnjfaBXxanCCVkBDFFFCx/q3wn8HeyZjKkhNb1X6N7+KXmHAx5MJlG73gm2Gp/VECz1Ix JcCBD+H4KL5ek47Ralrw8bXzji1ETyZ4YAQvFJ9BOdPWM3aZ4qPS+mvUMMlN/UdPg6k5GrKs75XGF Auw4Fl52bz53O8tm8sNQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rCtjk-00Af0t-1O; Tue, 12 Dec 2023 03:47:12 +0000 Received: from pidgin.makrotopia.org ([185.142.180.65]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rCtjg-00Aeze-2B; Tue, 12 Dec 2023 03:47:10 +0000 Received: from local by pidgin.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.96.2) (envelope-from ) id 1rCtjT-0002qO-1p; Tue, 12 Dec 2023 03:46:56 +0000 Date: Tue, 12 Dec 2023 03:46:52 +0000 From: Daniel Golle To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chunfeng Yun , Vinod Koul , Kishon Vijay Abraham I , Felix Fietkau , John Crispin , Sean Wang , Mark Lee , Lorenzo Bianconi , Matthias Brugger , AngeloGioacchino Del Regno , Andrew Lunn , Heiner Kallweit , Russell King , Alexander Couzens , Daniel Golle , Qingfang Deng , SkyLake Huang , Philipp Zabel , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-phy@lists.infradead.org Subject: [RFC PATCH net-next v3 2/8] phy: add driver for MediaTek pextp 10GE SerDes PHY Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231211_194708_858100_1A6297AE X-CRM114-Status: GOOD ( 26.12 ) 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 Add driver for MediaTek's pextp 10 Gigabit/s Ethernet SerDes PHY which can be found in the MT7988 SoC. The PHY can operates only in PHY_MODE_ETHERNET, the submode is one of PHY_INTERFACE_MODE_* corresponding to the supported modes: * USXGMII * 10GBase-R * 5GBase-R * 2500Base-X * 1000Base-X * Cisco SGMII (MAC side) In order to work-around a performance issue present on the first of two PEXTP present in MT7988 special tuning is applied which can be selected by adding the mediatek,usxgmii-performance-errata property to the device tree node. There is no documentation what-so-ever for the pextp registers and this driver is based on a GPL licensed implementation found in MediaTek's SDK. Signed-off-by: Daniel Golle --- MAINTAINERS | 1 + drivers/phy/mediatek/Kconfig | 11 + drivers/phy/mediatek/Makefile | 1 + drivers/phy/mediatek/phy-mtk-pextp.c | 361 +++++++++++++++++++++++++++ 4 files changed, 374 insertions(+) create mode 100644 drivers/phy/mediatek/phy-mtk-pextp.c diff --git a/MAINTAINERS b/MAINTAINERS index 98f7dd0499f17..b2772cfe2a704 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13510,6 +13510,7 @@ L: netdev@vger.kernel.org S: Maintained F: drivers/net/phy/mediatek-ge-soc.c F: drivers/net/phy/mediatek-ge.c +F: drivers/phy/mediatek/phy-mtk-pextp.c MEDIATEK I2C CONTROLLER DRIVER M: Qii Wang diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig index 3125ecb5d119f..a7749a6d96541 100644 --- a/drivers/phy/mediatek/Kconfig +++ b/drivers/phy/mediatek/Kconfig @@ -13,6 +13,17 @@ config PHY_MTK_PCIE callback for PCIe GEN3 port, it supports software efuse initialization. +config PHY_MTK_PEXTP + tristate "MediaTek PEXTP Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF && OF_ADDRESS + depends on HAS_IOMEM + select GENERIC_PHY + help + Say 'Y' here to add support for MediaTek pextp PHY driver. + The driver provides access to the Ethernet SerDes PHY supporting + various 1GE, 2.5GE, 5GE and 10GE modes. + config PHY_MTK_TPHY tristate "MediaTek T-PHY Driver" depends on ARCH_MEDIATEK || COMPILE_TEST diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile index c9a50395533eb..ca60c7b9b02ac 100644 --- a/drivers/phy/mediatek/Makefile +++ b/drivers/phy/mediatek/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_PHY_MTK_PCIE) += phy-mtk-pcie.o obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o obj-$(CONFIG_PHY_MTK_UFS) += phy-mtk-ufs.o obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o +obj-$(CONFIG_PHY_MTK_PEXTP) += phy-mtk-pextp.o phy-mtk-hdmi-drv-y := phy-mtk-hdmi.o phy-mtk-hdmi-drv-y += phy-mtk-hdmi-mt2701.o diff --git a/drivers/phy/mediatek/phy-mtk-pextp.c b/drivers/phy/mediatek/phy-mtk-pextp.c new file mode 100644 index 0000000000000..3ec48cf129105 --- /dev/null +++ b/drivers/phy/mediatek/phy-mtk-pextp.c @@ -0,0 +1,361 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* MediaTek 10GE SerDes PHY driver + * + * Copyright (c) 2023 Daniel Golle + * based on mtk_usxgmii.c found in MediaTek's SDK released under GPL-2.0 + * Copyright (c) 2022 MediaTek Inc. + * Author: Henry Yen + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MTK_PEXTP_NUM_CLOCKS 2 + +struct mtk_pextp_phy { + void __iomem *base; + struct device *dev; + struct reset_control *reset; + struct clk_bulk_data clocks[MTK_PEXTP_NUM_CLOCKS]; + bool da_war; +}; + +static bool mtk_interface_mode_is_xgmii(phy_interface_t interface) +{ + switch (interface) { + case PHY_INTERFACE_MODE_INTERNAL: + case PHY_INTERFACE_MODE_USXGMII: + case PHY_INTERFACE_MODE_10GBASER: + case PHY_INTERFACE_MODE_5GBASER: + return true; + default: + return false; + } +} + +static void mtk_pextp_setup(struct mtk_pextp_phy *pextp, phy_interface_t interface) +{ + bool is_10g = (interface == PHY_INTERFACE_MODE_10GBASER || + interface == PHY_INTERFACE_MODE_USXGMII); + bool is_2p5g = (interface == PHY_INTERFACE_MODE_2500BASEX); + bool is_5g = (interface == PHY_INTERFACE_MODE_5GBASER); + + dev_dbg(pextp->dev, "setting up for mode %s\n", phy_modes(interface)); + + /* Setup operation mode */ + if (is_10g) + iowrite32(0x00c9071c, pextp->base + 0x9024); + else + iowrite32(0x00d9071c, pextp->base + 0x9024); + + if (is_5g) + iowrite32(0xaaa5a5aa, pextp->base + 0x2020); + else + iowrite32(0xaa8585aa, pextp->base + 0x2020); + + if (is_2p5g || is_5g || is_10g) { + iowrite32(0x0c020707, pextp->base + 0x2030); + iowrite32(0x0e050f0f, pextp->base + 0x2034); + iowrite32(0x00140032, pextp->base + 0x2040); + } else { + iowrite32(0x0c020207, pextp->base + 0x2030); + iowrite32(0x0e05050f, pextp->base + 0x2034); + iowrite32(0x00200032, pextp->base + 0x2040); + } + + if (is_2p5g || is_10g) + iowrite32(0x00c014aa, pextp->base + 0x50f0); + else if (is_5g) + iowrite32(0x00c018aa, pextp->base + 0x50f0); + else + iowrite32(0x00c014ba, pextp->base + 0x50f0); + + if (is_5g) { + iowrite32(0x3777812b, pextp->base + 0x50e0); + iowrite32(0x005c9cff, pextp->base + 0x506c); + iowrite32(0x9dfafafa, pextp->base + 0x5070); + iowrite32(0x273f3f3f, pextp->base + 0x5074); + iowrite32(0xa8883868, pextp->base + 0x5078); + iowrite32(0x14661466, pextp->base + 0x507c); + } else { + iowrite32(0x3777c12b, pextp->base + 0x50e0); + iowrite32(0x005f9cff, pextp->base + 0x506c); + iowrite32(0x9d9dfafa, pextp->base + 0x5070); + iowrite32(0x27273f3f, pextp->base + 0x5074); + iowrite32(0xa7883c68, pextp->base + 0x5078); + iowrite32(0x11661166, pextp->base + 0x507c); + } + + if (is_2p5g || is_10g) { + iowrite32(0x0e000aaf, pextp->base + 0x5080); + iowrite32(0x08080d0d, pextp->base + 0x5084); + iowrite32(0x02030909, pextp->base + 0x5088); + } else if (is_5g) { + iowrite32(0x0e001abf, pextp->base + 0x5080); + iowrite32(0x080b0d0d, pextp->base + 0x5084); + iowrite32(0x02050909, pextp->base + 0x5088); + } else { + iowrite32(0x0e000eaf, pextp->base + 0x5080); + iowrite32(0x08080e0d, pextp->base + 0x5084); + iowrite32(0x02030b09, pextp->base + 0x5088); + } + + if (is_5g) { + iowrite32(0x0c000000, pextp->base + 0x50e4); + iowrite32(0x04000000, pextp->base + 0x50e8); + } else { + iowrite32(0x0c0c0000, pextp->base + 0x50e4); + iowrite32(0x04040000, pextp->base + 0x50e8); + } + + if (is_2p5g || mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x0f0f0c06, pextp->base + 0x50eC); + else + iowrite32(0x0f0f0606, pextp->base + 0x50eC); + + if (is_5g) { + iowrite32(0x50808c8c, pextp->base + 0x50a8); + iowrite32(0x18000000, pextp->base + 0x6004); + } else { + iowrite32(0x506e8c8c, pextp->base + 0x50a8); + iowrite32(0x18190000, pextp->base + 0x6004); + } + + if (is_10g) + iowrite32(0x01423342, pextp->base + 0x00f8); + else if (is_5g) + iowrite32(0x00a132a1, pextp->base + 0x00f8); + else if (is_2p5g) + iowrite32(0x009c329c, pextp->base + 0x00f8); + else + iowrite32(0x00fa32fa, pextp->base + 0x00f8); + + /* Force SGDT_OUT off and select PCS */ + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x80201f20, pextp->base + 0x00f4); + else + iowrite32(0x80201f21, pextp->base + 0x00f4); + + /* Force GLB_CKDET_OUT */ + iowrite32(0x00050c00, pextp->base + 0x0030); + + /* Force AEQ on */ + iowrite32(0x02002800, pextp->base + 0x0070); + ndelay(1020); + + /* Setup DA default value */ + iowrite32(0x00000020, pextp->base + 0x30b0); + iowrite32(0x00008a01, pextp->base + 0x3028); + iowrite32(0x0000a884, pextp->base + 0x302c); + iowrite32(0x00083002, pextp->base + 0x3024); + if (mtk_interface_mode_is_xgmii(interface)) { + iowrite32(0x00022220, pextp->base + 0x3010); + iowrite32(0x0f020a01, pextp->base + 0x5064); + iowrite32(0x06100600, pextp->base + 0x50b4); + if (interface == PHY_INTERFACE_MODE_USXGMII) + iowrite32(0x40704000, pextp->base + 0x3048); + else + iowrite32(0x47684100, pextp->base + 0x3048); + } else { + iowrite32(0x00011110, pextp->base + 0x3010); + iowrite32(0x40704000, pextp->base + 0x3048); + } + + if (!mtk_interface_mode_is_xgmii(interface) && !is_2p5g) + iowrite32(0x0000c000, pextp->base + 0x3064); + + if (interface != PHY_INTERFACE_MODE_10GBASER) { + iowrite32(0xa8000000, pextp->base + 0x3050); + iowrite32(0x000000aa, pextp->base + 0x3054); + } else { + iowrite32(0x00000000, pextp->base + 0x3050); + iowrite32(0x00000000, pextp->base + 0x3054); + } + + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x00000f00, pextp->base + 0x306c); + else if (is_2p5g) + iowrite32(0x22000f00, pextp->base + 0x306c); + else + iowrite32(0x20200f00, pextp->base + 0x306c); + + if (interface == PHY_INTERFACE_MODE_10GBASER && pextp->da_war) + iowrite32(0x0007b400, pextp->base + 0xa008); + + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x00040000, pextp->base + 0xa060); + else + iowrite32(0x00050000, pextp->base + 0xa060); + + if (is_10g) + iowrite32(0x00000001, pextp->base + 0x90d0); + else if (is_5g) + iowrite32(0x00000003, pextp->base + 0x90d0); + else if (is_2p5g) + iowrite32(0x00000005, pextp->base + 0x90d0); + else + iowrite32(0x00000007, pextp->base + 0x90d0); + + /* Release reset */ + iowrite32(0x0200e800, pextp->base + 0x0070); + usleep_range(150, 500); + + /* Switch to P0 */ + iowrite32(0x0200c111, pextp->base + 0x0070); + ndelay(1020); + iowrite32(0x0200c101, pextp->base + 0x0070); + usleep_range(15, 50); + + if (mtk_interface_mode_is_xgmii(interface)) { + /* Switch to Gen3 */ + iowrite32(0x0202c111, pextp->base + 0x0070); + } else { + /* Switch to Gen2 */ + iowrite32(0x0201c111, pextp->base + 0x0070); + } + ndelay(1020); + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x0202c101, pextp->base + 0x0070); + else + iowrite32(0x0201c101, pextp->base + 0x0070); + usleep_range(100, 500); + iowrite32(0x00000030, pextp->base + 0x30b0); + if (mtk_interface_mode_is_xgmii(interface)) + iowrite32(0x80201f00, pextp->base + 0x00f4); + else + iowrite32(0x80201f01, pextp->base + 0x00f4); + + iowrite32(0x30000000, pextp->base + 0x3040); + usleep_range(400, 1000); +} + +static int mtk_pextp_set_mode(struct phy *phy, enum phy_mode mode, int submode) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + if (mode != PHY_MODE_ETHERNET) + return -EINVAL; + + switch (submode) { + case PHY_INTERFACE_MODE_1000BASEX: + case PHY_INTERFACE_MODE_2500BASEX: + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_5GBASER: + case PHY_INTERFACE_MODE_10GBASER: + case PHY_INTERFACE_MODE_USXGMII: + mtk_pextp_setup(pextp, submode); + return 0; + default: + return -EINVAL; + } +} + +static int mtk_pextp_reset(struct phy *phy) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + reset_control_assert(pextp->reset); + usleep_range(100, 500); + reset_control_deassert(pextp->reset); + usleep_range(1, 10); + + return 0; +} + +static int mtk_pextp_power_on(struct phy *phy) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + return clk_bulk_prepare_enable(MTK_PEXTP_NUM_CLOCKS, pextp->clocks); +} + +static int mtk_pextp_power_off(struct phy *phy) +{ + struct mtk_pextp_phy *pextp = phy_get_drvdata(phy); + + clk_bulk_disable_unprepare(MTK_PEXTP_NUM_CLOCKS, pextp->clocks); + + return 0; +} + +static const struct phy_ops mtk_pextp_ops = { + .power_on = mtk_pextp_power_on, + .power_off = mtk_pextp_power_off, + .set_mode = mtk_pextp_set_mode, + .reset = mtk_pextp_reset, + .owner = THIS_MODULE, +}; + +static int mtk_pextp_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct phy_provider *phy_provider; + struct mtk_pextp_phy *pextp; + struct phy *phy; + + if (!np) + return -ENODEV; + + pextp = devm_kzalloc(&pdev->dev, sizeof(*pextp), GFP_KERNEL); + if (!pextp) + return -ENOMEM; + + pextp->base = devm_of_iomap(&pdev->dev, np, 0, NULL); + if (!pextp->base) + return -EIO; + + pextp->dev = &pdev->dev; + + pextp->clocks[0].id = "topxtal"; + pextp->clocks[0].clk = devm_clk_get(&pdev->dev, pextp->clocks[0].id); + if (IS_ERR(pextp->clocks[0].clk)) + return PTR_ERR(pextp->clocks[0].clk); + + pextp->clocks[1].id = "xfipll"; + pextp->clocks[1].clk = devm_clk_get(&pdev->dev, pextp->clocks[1].id); + if (IS_ERR(pextp->clocks[1].clk)) + return PTR_ERR(pextp->clocks[1].clk); + + pextp->reset = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(pextp->reset)) + return PTR_ERR(pextp->reset); + + pextp->da_war = of_property_read_bool(np, "mediatek,usxgmii-performance-errata"); + + phy = devm_phy_create(&pdev->dev, NULL, &mtk_pextp_ops); + if (IS_ERR(phy)) + return PTR_ERR(phy); + + phy_set_drvdata(phy, pextp); + + phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id mtk_pextp_match[] = { + { .compatible = "mediatek,mt7988-xfi-pextp", }, + { } +}; +MODULE_DEVICE_TABLE(of, mtk_pextp_match); + +static struct platform_driver mtk_pextp_driver = { + .probe = mtk_pextp_probe, + .driver = { + .name = "mtk-pextp", + .of_match_table = mtk_pextp_match, + }, +}; +module_platform_driver(mtk_pextp_driver); + +MODULE_DESCRIPTION("MediaTek pextp SerDes PHY driver"); +MODULE_AUTHOR("Daniel Golle "); +MODULE_LICENSE("GPL");