From patchwork Thu Apr 16 18:57:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Jernej_=C5=A0krabec?= X-Patchwork-Id: 11493681 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AC14592C for ; Thu, 16 Apr 2020 18:58:40 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2A1DD21D95 for ; Thu, 16 Apr 2020 18:58:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DLEtmIye" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2A1DD21D95 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=siol.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=IBYPJgpw6VtvmDBspszjXzitrYo+GgfHTVwDGO3v+7w=; b=DLEtmIyed+iXMO 8r5b5eohmPvAD01YA5GR2ba5bS1IBYK3oDuT+kjaN2iKYoMK5sf+v0XNJlxHfBnSWEwxlynRRjsfu nNxAocDOfRcV72U8G5VKK1W6ln2mNuDy/KzXgY17XbuIWOQnaQDWYu7ToMlpGumo72mTg6GZVgn2S 7FDBufvBoSKNJ3ZofskOH6ITMgLSgnVLyNBl4w2bwdbKaFUxvLD+S2eAPuLxjWlZSK9flStSTJt6T lzn1c4fLC1R+53l+X9ckB2Km48zaCq7NhjllTF0zHQvuYOGKAWI/QI8ZinPUv5stOmxLTSmRHRnK5 wv3X8etgWN1UVI+5uIoA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jP9iZ-0002GA-3v; Thu, 16 Apr 2020 18:58:31 +0000 Received: from mailoutvs52.siol.net ([185.57.226.243] helo=mail.siol.net) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jP9iM-00026u-SI for linux-arm-kernel@lists.infradead.org; Thu, 16 Apr 2020 18:58:21 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTP id DD8D0524696; Thu, 16 Apr 2020 20:58:13 +0200 (CEST) X-Virus-Scanned: amavisd-new at psrvmta09.zcs-production.pri Received: from mail.siol.net ([127.0.0.1]) by localhost (psrvmta09.zcs-production.pri [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id Y-h1UHWlQNt9; Thu, 16 Apr 2020 20:58:13 +0200 (CEST) Received: from mail.siol.net (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTPS id 30C905246A3; Thu, 16 Apr 2020 20:58:13 +0200 (CEST) Received: from localhost.localdomain (cpe-194-152-20-232.static.triera.net [194.152.20.232]) (Authenticated sender: 031275009) by mail.siol.net (Postfix) with ESMTPSA id B19535246A4; Thu, 16 Apr 2020 20:58:10 +0200 (CEST) From: Jernej Skrabec To: robh+dt@kernel.org, andrew@lunn.ch, f.fainelli@gmail.com, hkallweit1@gmail.com Subject: [RFC PATCH 2/4] net: phy: Add support for AC200 EPHY Date: Thu, 16 Apr 2020 20:57:56 +0200 Message-Id: <20200416185758.1388148-3-jernej.skrabec@siol.net> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200416185758.1388148-1-jernej.skrabec@siol.net> References: <20200416185758.1388148-1-jernej.skrabec@siol.net> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200416_115819_075106_043DA6C8 X-CRM114-Status: GOOD ( 16.46 ) X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [185.57.226.243 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, netdev@vger.kernel.org, linux@armlinux.org.uk, mripard@kernel.org, linux-kernel@vger.kernel.org, wens@csie.org, lee.jones@linaro.org, davem@davemloft.net, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org AC200 MFD IC supports Fast Ethernet PHY. Add a driver for it. Signed-off-by: Jernej Skrabec --- drivers/net/phy/Kconfig | 7 ++ drivers/net/phy/Makefile | 1 + drivers/net/phy/ac200.c | 206 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 214 insertions(+) create mode 100644 drivers/net/phy/ac200.c diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 3fa33d27eeba..16af69f69eaf 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -288,6 +288,13 @@ config ADIN_PHY - ADIN1300 - Robust,Industrial, Low Latency 10/100/1000 Gigabit Ethernet PHY +config AC200_PHY + tristate "AC200 EPHY" + depends on NVMEM + depends on OF + help + Fast ethernet PHY as found in X-Powers AC200 multi-function device. + config AMD_PHY tristate "AMD PHYs" ---help--- diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 2f5c7093a65b..b0c5b91900fa 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -53,6 +53,7 @@ obj-$(CONFIG_SFP) += sfp.o sfp-obj-$(CONFIG_SFP) += sfp-bus.o obj-y += $(sfp-obj-y) $(sfp-obj-m) +obj-$(CONFIG_AC200_PHY) += ac200.o obj-$(CONFIG_ADIN_PHY) += adin.o obj-$(CONFIG_AMD_PHY) += amd.o aquantia-objs += aquantia_main.o diff --git a/drivers/net/phy/ac200.c b/drivers/net/phy/ac200.c new file mode 100644 index 000000000000..3d7856ff8f91 --- /dev/null +++ b/drivers/net/phy/ac200.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0+ +/** + * Driver for AC200 Ethernet PHY + * + * Copyright (c) 2020 Jernej Skrabec + */ + +#include +#include +#include +#include +#include +#include +#include + +#define AC200_EPHY_ID 0x00441400 +#define AC200_EPHY_ID_MASK 0x0ffffff0 + +/* macros for system ephy control 0 register */ +#define AC200_EPHY_RESET_INVALID BIT(0) +#define AC200_EPHY_SYSCLK_GATING BIT(1) + +/* macros for system ephy control 1 register */ +#define AC200_EPHY_E_EPHY_MII_IO_EN BIT(0) +#define AC200_EPHY_E_LNK_LED_IO_EN BIT(1) +#define AC200_EPHY_E_SPD_LED_IO_EN BIT(2) +#define AC200_EPHY_E_DPX_LED_IO_EN BIT(3) + +/* macros for ephy control register */ +#define AC200_EPHY_SHUTDOWN BIT(0) +#define AC200_EPHY_LED_POL BIT(1) +#define AC200_EPHY_CLK_SEL BIT(2) +#define AC200_EPHY_ADDR(x) (((x) & 0x1F) << 4) +#define AC200_EPHY_XMII_SEL BIT(11) +#define AC200_EPHY_CALIB(x) (((x) & 0xF) << 12) + +struct ac200_ephy_dev { + struct phy_driver *ephy; + struct regmap *regmap; +}; + +static char *ac200_phy_name = "AC200 EPHY"; + +static int ac200_ephy_config_init(struct phy_device *phydev) +{ + const struct ac200_ephy_dev *priv = phydev->drv->driver_data; + unsigned int value; + int ret; + + phy_write(phydev, 0x1f, 0x0100); /* Switch to Page 1 */ + phy_write(phydev, 0x12, 0x4824); /* Disable APS */ + + phy_write(phydev, 0x1f, 0x0200); /* Switch to Page 2 */ + phy_write(phydev, 0x18, 0x0000); /* PHYAFE TRX optimization */ + + phy_write(phydev, 0x1f, 0x0600); /* Switch to Page 6 */ + phy_write(phydev, 0x14, 0x708f); /* PHYAFE TX optimization */ + phy_write(phydev, 0x13, 0xF000); /* PHYAFE RX optimization */ + phy_write(phydev, 0x15, 0x1530); + + phy_write(phydev, 0x1f, 0x0800); /* Switch to Page 6 */ + phy_write(phydev, 0x18, 0x00bc); /* PHYAFE TRX optimization */ + + phy_write(phydev, 0x1f, 0x0100); /* switch to page 1 */ + phy_clear_bits(phydev, 0x17, BIT(3)); /* disable intelligent IEEE */ + + /* next two blocks disable 802.3az IEEE */ + phy_write(phydev, 0x1f, 0x0200); /* switch to page 2 */ + phy_write(phydev, 0x18, 0x0000); + + phy_write(phydev, 0x1f, 0x0000); /* switch to page 0 */ + phy_clear_bits_mmd(phydev, 0x7, 0x3c, BIT(1)); + + if (phydev->interface == PHY_INTERFACE_MODE_RMII) + value = AC200_EPHY_XMII_SEL; + else + value = 0; + + ret = regmap_update_bits(priv->regmap, AC200_EPHY_CTL, + AC200_EPHY_XMII_SEL, value); + if (ret) + return ret; + + /* FIXME: This is H6 specific */ + phy_set_bits(phydev, 0x13, BIT(12)); + + return 0; +} + +static int ac200_ephy_probe(struct platform_device *pdev) +{ + struct ac200_dev *ac200 = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct ac200_ephy_dev *priv; + struct nvmem_cell *calcell; + struct phy_driver *ephy; + u16 *caldata, calib; + size_t callen; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ephy = devm_kzalloc(dev, sizeof(*ephy), GFP_KERNEL); + if (!ephy) + return -ENOMEM; + + calcell = devm_nvmem_cell_get(dev, "calibration"); + if (IS_ERR(calcell)) { + dev_err(dev, "Unable to find calibration data!\n"); + return PTR_ERR(calcell); + } + + caldata = nvmem_cell_read(calcell, &callen); + if (IS_ERR(caldata)) { + dev_err(dev, "Unable to read calibration data!\n"); + return PTR_ERR(caldata); + } + + if (callen != 2) { + dev_err(dev, "Calibration data has wrong length: 2 != %zu\n", + callen); + kfree(caldata); + return -EINVAL; + } + + calib = *caldata + 3; + kfree(caldata); + + ephy->phy_id = AC200_EPHY_ID; + ephy->phy_id_mask = AC200_EPHY_ID_MASK; + ephy->name = ac200_phy_name; + ephy->driver_data = priv; + ephy->soft_reset = genphy_soft_reset; + ephy->config_init = ac200_ephy_config_init; + ephy->suspend = genphy_suspend; + ephy->resume = genphy_resume; + + priv->ephy = ephy; + priv->regmap = ac200->regmap; + platform_set_drvdata(pdev, priv); + + ret = regmap_write(ac200->regmap, AC200_SYS_EPHY_CTL0, + AC200_EPHY_RESET_INVALID | + AC200_EPHY_SYSCLK_GATING); + if (ret) + return ret; + + ret = regmap_write(ac200->regmap, AC200_SYS_EPHY_CTL1, + AC200_EPHY_E_EPHY_MII_IO_EN | + AC200_EPHY_E_LNK_LED_IO_EN | + AC200_EPHY_E_SPD_LED_IO_EN | + AC200_EPHY_E_DPX_LED_IO_EN); + if (ret) + return ret; + + ret = regmap_write(ac200->regmap, AC200_EPHY_CTL, + AC200_EPHY_LED_POL | + AC200_EPHY_CLK_SEL | + AC200_EPHY_ADDR(1) | + AC200_EPHY_CALIB(calib)); + if (ret) + return ret; + + ret = phy_driver_register(priv->ephy, THIS_MODULE); + if (ret) { + dev_err(dev, "Unable to register phy\n"); + return ret; + } + + return 0; +} + +static int ac200_ephy_remove(struct platform_device *pdev) +{ + struct ac200_ephy_dev *priv = platform_get_drvdata(pdev); + + phy_driver_unregister(priv->ephy); + + regmap_write(priv->regmap, AC200_EPHY_CTL, AC200_EPHY_SHUTDOWN); + regmap_write(priv->regmap, AC200_SYS_EPHY_CTL1, 0); + regmap_write(priv->regmap, AC200_SYS_EPHY_CTL0, 0); + + return 0; +} + +static const struct of_device_id ac200_ephy_match[] = { + { .compatible = "x-powers,ac200-ephy" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ac200_ephy_match); + +static struct platform_driver ac200_ephy_driver = { + .probe = ac200_ephy_probe, + .remove = ac200_ephy_remove, + .driver = { + .name = "ac200-ephy", + .of_match_table = ac200_ephy_match, + }, +}; +module_platform_driver(ac200_ephy_driver); + +MODULE_AUTHOR("Jernej Skrabec "); +MODULE_DESCRIPTION("AC200 Ethernet PHY driver"); +MODULE_LICENSE("GPL");