From patchwork Sat Nov 16 13:12:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 13877583 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 0A4DBD68BC9 for ; Sat, 16 Nov 2024 13:18:16 +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-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:To:From:Reply-To: Cc:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5IGP+shESsvu2ndUT27AHkdM7Q1r5cRdKUCipxdLz28=; b=i7ARGqaGRkpL0WcmvUryOgL1lB FyFQBXjrRMcAj3ztXoySU0iMqen5MLWpFjQ/IW7iGN7tFDzZoR0ozKqbKwfJODH4fPD6br5ARhM7t +WrYRuC8TlReeOpr/m7gsztPZ3962tQVgh+KC8hzMvgo5rNIeJgTi6hBiiSPG13/S25/VEBasVSQp sYZQP/1KJ7gpuE7tQr/oAmimdkYYbtTyPh0reLH19XHS0z53thrArFo4bot6y4vzllYecir8Amb5Y vvwgfCCEfM73D749JotaOBQbO2VAyxvMPfHOAYOQA7clLKA4WfH/Zp8EMO8oAVJHC7lDha6PpZwjP 8F/Yw9XQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tCIgp-00000005dsz-0RWM; Sat, 16 Nov 2024 13:18:15 +0000 Received: from mail-wm1-x32d.google.com ([2a00:1450:4864:20::32d]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tCIcM-00000005crQ-1xjr; Sat, 16 Nov 2024 13:13:40 +0000 Received: by mail-wm1-x32d.google.com with SMTP id 5b1f17b1804b1-4319399a411so23940025e9.2; Sat, 16 Nov 2024 05:13:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1731762817; x=1732367617; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=5IGP+shESsvu2ndUT27AHkdM7Q1r5cRdKUCipxdLz28=; b=bawT4mffN74zRanqSS6JJZRE+CDJBaQrRUG4iKz1IPnfnlHszCnjKafEmn5gukjqX0 /bw9kWp7EgwKtckpehzQ75bb0mTl6muKUEcklfju5lSzbVB/UTlKgSI9Jfck875R8t+o lSdQCa2p4sUrqSCSugrSPFmzUfGxMiBMUaRiZ6cfs4D8Z5x813cEiOaxQtTtLlAh1zVq i6OYj3m9hA+JhnTNT4vltVTVF9MI2Yx/TQCQp5funRMyO2s+fKVa1GO5/pf9+f7R4xLC GQTBOMXv7S+Ma8a0n81/HC5xb92DaFkbUFPCVb4qCnBS5MFV0a6pK+mYNOe0AKNC7U5A sItw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731762817; x=1732367617; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5IGP+shESsvu2ndUT27AHkdM7Q1r5cRdKUCipxdLz28=; b=RN4zhxP65rotFK1VBgOEK/viduNIP6nVY8M9xqj1BADhcKLkvC6ncdw/Kgj1NsLo2s gSdikhw6wNCs/MDIgHDXR4QHA+iTXHXE94Xg5I9TR+Hhv76zAazF7pJRyDzvsh79kIuc HQvcNokdlpSOLJOwjpxVvD0BK+TmijPwiEVdr40MnBIBoIusGIdz5VnaZ0qTt9ZgKxIT fZMbl51n/xqyYJ7thN2VtKCIzwxNK6wpFpBJ3qemaPpXyoc3L1Ma79Yic5RtFL46Lmap RmjOQWjHatnRIIeuOg+xF3Ym4iYwIMTLDNcyfFZ0Od8pwR1MPkbQMObSBdqquThnkvg4 VrWg== X-Forwarded-Encrypted: i=1; AJvYcCXBjiCygMcN3vhrwktLwQhL6p4ah9qiXCrmNRLjMu+/6Av1aKPnMicB++G6k9N6EMWeMpxu9caXnORQ3tI6VT4=@lists.infradead.org, AJvYcCXrhT7uquPO80B0rPt94AI1JMI6Ff9AT+x2yLGgYyG36D9tXKqZOxHVF8/ZBav1jMcq9xkdsmRPxLF5YIVWWEAV@lists.infradead.org X-Gm-Message-State: AOJu0YzI2ECYNBZ1LNStQebcPvnlvvolm/U6l/Yb3m7GSpG1KVlMS9fU K9KevAs3bhpcJJR3zlWo6ggQ8gMUt8BgXMIAziFWvMP18s7G0lZ3 X-Google-Smtp-Source: AGHT+IGxo8METDeYsFobgVImGHqDWR52OTWb2f+UWHXEkulQMVTL5b0vlutAiyprkZqrzSxoK3/fJA== X-Received: by 2002:a05:600c:1c09:b0:431:3927:d1bc with SMTP id 5b1f17b1804b1-432df71af8bmr56637485e9.2.1731762816896; Sat, 16 Nov 2024 05:13:36 -0800 (PST) Received: from localhost.localdomain (93-34-91-161.ip49.fastwebnet.it. [93.34.91.161]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-432dab7206csm87459595e9.7.2024.11.16.05.13.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 Nov 2024 05:13:36 -0800 (PST) From: Christian Marangi To: Christian Marangi , Andrew Lunn , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiner Kallweit , Russell King , Matthias Brugger , AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, upstream@airoha.com Subject: [net-next PATCH v6 4/4] net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY Date: Sat, 16 Nov 2024 14:12:49 +0100 Message-ID: <20241116131257.51249-5-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241116131257.51249-1-ansuelsmth@gmail.com> References: <20241116131257.51249-1-ansuelsmth@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241116_051338_528793_742CD5BC X-CRM114-Status: GOOD ( 25.06 ) 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 Add support for Airoha AN8855 Internal Switch Gigabit PHY. This is a simple PHY driver to configure and calibrate the PHY for the AN8855 Switch with the use of NVMEM cells. Signed-off-by: Christian Marangi --- MAINTAINERS | 1 + drivers/net/phy/Kconfig | 5 + drivers/net/phy/Makefile | 1 + drivers/net/phy/air_an8855.c | 268 +++++++++++++++++++++++++++++++++++ 4 files changed, 275 insertions(+) create mode 100644 drivers/net/phy/air_an8855.c diff --git a/MAINTAINERS b/MAINTAINERS index e3077d9feee2..cf34add2a0bb 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -726,6 +726,7 @@ S: Maintained F: Documentation/devicetree/bindings/net/dsa/airoha,an8855.yaml F: drivers/net/dsa/an8855.c F: drivers/net/dsa/an8855.h +F: drivers/net/phy/air_an8855.c AIROHA ETHERNET DRIVER M: Lorenzo Bianconi diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index ee3ea0b56d48..1d474038ea7f 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -79,6 +79,11 @@ config SFP comment "MII PHY device drivers" +config AIR_AN8855_PHY + tristate "Airoha AN8855 Internal Gigabit PHY" + help + Currently supports the internal Airoha AN8855 Switch PHY. + config AIR_EN8811H_PHY tristate "Airoha EN8811H 2.5 Gigabit PHY" help diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 90f886844381..baba7894785b 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -35,6 +35,7 @@ obj-y += $(sfp-obj-y) $(sfp-obj-m) obj-$(CONFIG_ADIN_PHY) += adin.o obj-$(CONFIG_ADIN1100_PHY) += adin1100.o +obj-$(CONFIG_AIR_AN8855_PHY) += air_an8855.o obj-$(CONFIG_AIR_EN8811H_PHY) += air_en8811h.o obj-$(CONFIG_AMD_PHY) += amd.o obj-$(CONFIG_AMCC_QT2025_PHY) += qt2025.o diff --git a/drivers/net/phy/air_an8855.c b/drivers/net/phy/air_an8855.c new file mode 100644 index 000000000000..10627ea2be38 --- /dev/null +++ b/drivers/net/phy/air_an8855.c @@ -0,0 +1,268 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2024 Christian Marangi + */ + +#include +#include +#include +#include + +#define AN8855_PHY_SELECT_PAGE 0x1f +/* Mask speculation based on page up to 0x4 */ +#define AN8855_PHY_PAGE GENMASK(2, 0) +#define AN8855_PHY_PAGE_STANDARD FIELD_PREP_CONST(AN8855_PHY_PAGE, 0x0) +#define AN8855_PHY_PAGE_EXTENDED_1 FIELD_PREP_CONST(AN8855_PHY_PAGE, 0x1) + +/* MII Registers Page 1 */ +#define AN8855_PHY_EXT_REG_14 0x14 +#define AN8855_PHY_EN_DOWN_SHIFT BIT(4) + +/* R50 Calibration regs in MDIO_MMD_VEND1 */ +#define AN8855_PHY_R500HM_RSEL_TX_AB 0x174 +#define AN8855_PHY_R50OHM_RSEL_TX_A_EN BIT(15) +#define AN8855_PHY_R50OHM_RSEL_TX_A GENMASK(14, 8) +#define AN8855_PHY_R50OHM_RSEL_TX_B_EN BIT(7) +#define AN8855_PHY_R50OHM_RSEL_TX_B GENMASK(6, 0) +#define AN8855_PHY_R500HM_RSEL_TX_CD 0x175 +#define AN8855_PHY_R50OHM_RSEL_TX_C_EN BIT(15) +#define AN8855_PHY_R50OHM_RSEL_TX_C GENMASK(14, 8) +#define AN8855_PHY_R50OHM_RSEL_TX_D_EN BIT(7) +#define AN8855_PHY_R50OHM_RSEL_TX_D GENMASK(6, 0) + +#define AN8855_SWITCH_EFUSE_R50O GENMASK(30, 24) + +/* PHY TX PAIR DELAY SELECT Register */ +#define AN8855_PHY_TX_PAIR_DLY_SEL_GBE 0x013 +#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_A_GBE GENMASK(14, 12) +#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_B_GBE GENMASK(10, 8) +#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_C_GBE GENMASK(6, 4) +#define AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_D_GBE GENMASK(2, 0) +/* PHY ADC Register */ +#define AN8855_PHY_RXADC_CTRL 0x0d8 +#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_A BIT(12) +#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_B BIT(8) +#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_C BIT(4) +#define AN8855_PHY_RG_AD_SAMNPLE_PHSEL_D BIT(0) +#define AN8855_PHY_RXADC_REV_0 0x0d9 +#define AN8855_PHY_RG_AD_RESERVE0_A GENMASK(15, 8) +#define AN8855_PHY_RG_AD_RESERVE0_B GENMASK(7, 0) +#define AN8855_PHY_RXADC_REV_1 0x0da +#define AN8855_PHY_RG_AD_RESERVE0_C GENMASK(15, 8) +#define AN8855_PHY_RG_AD_RESERVE0_D GENMASK(7, 0) + +#define AN8855_PHY_ID 0xc0ff0410 + +#define AN8855_PHY_FLAGS_EN_CALIBRATION BIT(0) + +struct air_an8855_priv { + u8 calibration_data[4]; +}; + +static const u8 dsa_r50ohm_table[] = { + 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, + 127, 127, 127, 127, 127, 127, 127, 126, 122, 117, + 112, 109, 104, 101, 97, 94, 90, 88, 84, 80, + 78, 74, 72, 68, 66, 64, 61, 58, 56, 53, + 51, 48, 47, 44, 42, 40, 38, 36, 34, 32, + 31, 28, 27, 24, 24, 22, 20, 18, 16, 16, + 14, 12, 11, 9 +}; + +static int en8855_get_r50ohm_val(struct device *dev, const char *calib_name, + u8 *dest) +{ + u32 shift_sel, val; + int ret; + int i; + + ret = nvmem_cell_read_u32(dev, calib_name, &val); + if (ret) + return ret; + + shift_sel = FIELD_GET(AN8855_SWITCH_EFUSE_R50O, val); + for (i = 0; i < ARRAY_SIZE(dsa_r50ohm_table); i++) + if (dsa_r50ohm_table[i] == shift_sel) + break; + + if (i < 8 || i >= ARRAY_SIZE(dsa_r50ohm_table)) + *dest = dsa_r50ohm_table[25]; + else + *dest = dsa_r50ohm_table[i - 8]; + + return 0; +} + +static int an8855_probe(struct phy_device *phydev) +{ + struct device *dev = &phydev->mdio.dev; + struct device_node *node = dev->of_node; + struct air_an8855_priv *priv; + int ret; + + /* If we don't have a node, skip get calib */ + if (!node) + return 0; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = en8855_get_r50ohm_val(dev, "tx_a", &priv->calibration_data[0]); + if (ret) + return ret; + + ret = en8855_get_r50ohm_val(dev, "tx_b", &priv->calibration_data[1]); + if (ret) + return ret; + + ret = en8855_get_r50ohm_val(dev, "tx_c", &priv->calibration_data[2]); + if (ret) + return ret; + + ret = en8855_get_r50ohm_val(dev, "tx_d", &priv->calibration_data[3]); + if (ret) + return ret; + + phydev->priv = priv; + + return 0; +} + +static int an8855_get_downshift(struct phy_device *phydev, u8 *data) +{ + int val; + + val = phy_read_paged(phydev, AN8855_PHY_PAGE_EXTENDED_1, AN8855_PHY_EXT_REG_14); + if (val < 0) + return val; + + *data = val & AN8855_PHY_EN_DOWN_SHIFT ? DOWNSHIFT_DEV_DEFAULT_COUNT : + DOWNSHIFT_DEV_DISABLE; + + return 0; +} + +static int an8855_set_downshift(struct phy_device *phydev, u8 cnt) +{ + u16 ds = cnt != DOWNSHIFT_DEV_DISABLE ? AN8855_PHY_EN_DOWN_SHIFT : 0; + + return phy_modify_paged(phydev, AN8855_PHY_PAGE_EXTENDED_1, + AN8855_PHY_EXT_REG_14, AN8855_PHY_EN_DOWN_SHIFT, + ds); +} + +static int an8855_config_init(struct phy_device *phydev) +{ + struct air_an8855_priv *priv = phydev->priv; + int ret; + + /* Enable HW auto downshift */ + ret = an8855_set_downshift(phydev, DOWNSHIFT_DEV_DEFAULT_COUNT); + if (ret) + return ret; + + /* Apply calibration values, if needed. + * AN8855_PHY_FLAGS_EN_CALIBRATION signal this. + */ + if (priv && phydev->dev_flags & AN8855_PHY_FLAGS_EN_CALIBRATION) { + u8 *calibration_data = priv->calibration_data; + + ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_R500HM_RSEL_TX_AB, + AN8855_PHY_R50OHM_RSEL_TX_A | AN8855_PHY_R50OHM_RSEL_TX_B, + FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_A, calibration_data[0]) | + FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_B, calibration_data[1])); + if (ret) + return ret; + ret = phy_modify_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_R500HM_RSEL_TX_CD, + AN8855_PHY_R50OHM_RSEL_TX_C | AN8855_PHY_R50OHM_RSEL_TX_D, + FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_C, calibration_data[2]) | + FIELD_PREP(AN8855_PHY_R50OHM_RSEL_TX_D, calibration_data[3])); + if (ret) + return ret; + } + + /* Apply values to reduce signal noise */ + ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_TX_PAIR_DLY_SEL_GBE, + FIELD_PREP(AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_A_GBE, 0x4) | + FIELD_PREP(AN8855_PHY_CR_DA_TX_PAIR_DELKAY_SEL_C_GBE, 0x4)); + if (ret) + return ret; + ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_RXADC_CTRL, + AN8855_PHY_RG_AD_SAMNPLE_PHSEL_A | + AN8855_PHY_RG_AD_SAMNPLE_PHSEL_C); + if (ret) + return ret; + ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_RXADC_REV_0, + FIELD_PREP(AN8855_PHY_RG_AD_RESERVE0_A, 0x1)); + if (ret) + return ret; + ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, AN8855_PHY_RXADC_REV_1, + FIELD_PREP(AN8855_PHY_RG_AD_RESERVE0_C, 0x1)); + if (ret) + return ret; + + return 0; +} + +static int an8855_get_tunable(struct phy_device *phydev, + struct ethtool_tunable *tuna, void *data) +{ + switch (tuna->id) { + case ETHTOOL_PHY_DOWNSHIFT: + return an8855_get_downshift(phydev, data); + default: + return -EOPNOTSUPP; + } +} + +static int an8855_set_tunable(struct phy_device *phydev, + struct ethtool_tunable *tuna, const void *data) +{ + switch (tuna->id) { + case ETHTOOL_PHY_DOWNSHIFT: + return an8855_set_downshift(phydev, *(const u8 *)data); + default: + return -EOPNOTSUPP; + } +} + +static int an8855_read_page(struct phy_device *phydev) +{ + return __phy_read(phydev, AN8855_PHY_SELECT_PAGE); +} + +static int an8855_write_page(struct phy_device *phydev, int page) +{ + return __phy_write(phydev, AN8855_PHY_SELECT_PAGE, page); +} + +static struct phy_driver an8855_driver[] = { +{ + PHY_ID_MATCH_EXACT(AN8855_PHY_ID), + .name = "Airoha AN8855 internal PHY", + /* PHY_GBIT_FEATURES */ + .flags = PHY_IS_INTERNAL, + .probe = an8855_probe, + .config_init = an8855_config_init, + .soft_reset = genphy_soft_reset, + .get_tunable = an8855_get_tunable, + .set_tunable = an8855_set_tunable, + .suspend = genphy_suspend, + .resume = genphy_resume, + .read_page = an8855_read_page, + .write_page = an8855_write_page, +}, }; + +module_phy_driver(an8855_driver); + +static struct mdio_device_id __maybe_unused an8855_tbl[] = { + { PHY_ID_MATCH_EXACT(AN8855_PHY_ID) }, + { } +}; + +MODULE_DEVICE_TABLE(mdio, an8855_tbl); + +MODULE_DESCRIPTION("Airoha AN8855 PHY driver"); +MODULE_AUTHOR("Christian Marangi "); +MODULE_LICENSE("GPL");