From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A94DEC6787A for ; Mon, 8 Oct 2018 23:50:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 60EA721508 for ; Mon, 8 Oct 2018 23:50:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="lm4aRRYc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 60EA721508 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727031AbeJIHEN (ORCPT ); Tue, 9 Oct 2018 03:04:13 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:42974 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726886AbeJIHEN (ORCPT ); Tue, 9 Oct 2018 03:04:13 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id w98NnqcZ126366; Mon, 8 Oct 2018 18:49:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1539042592; bh=1MLc6uK8ga7tgU6hXX5r/Nx9hLnMbXXXaWdHd27QlvM=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=lm4aRRYcQsUBH31/RrWvLFxCD/T+L+rT4YkXQ/IkUwRCo3UyVgFA0k9Zk2SVu2B/2 H0ZwifQ8ePIv08YuDYzg5a7pbvo0/Ekv+CmJRStBFROBrMGY9Fyd2pBeC7PV9LlgUY xeNnSvJuDGPnkgRB8vlWlBz9dw7JvjiaEToVap+8= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id w98NnqZ3004763; Mon, 8 Oct 2018 18:49:52 -0500 Received: from DFLE115.ent.ti.com (10.64.6.36) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Mon, 8 Oct 2018 18:49:52 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DFLE115.ent.ti.com (10.64.6.36) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Mon, 8 Oct 2018 18:49:52 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w98NnpMi019770; Mon, 8 Oct 2018 18:49:52 -0500 Received: from localhost (uda0226610.dhcp.ti.com [128.247.59.147]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id w98Nnpx25220; Mon, 8 Oct 2018 18:49:51 -0500 (CDT) From: Grygorii Strashko To: "David S. Miller" , , Tony Lindgren , Rob Herring , Kishon Vijay Abraham I CC: Sekhar Nori , , , , Grygorii Strashko Subject: [RFC PATCH 03/11] phy: ti: introduce phy-gmii-sel driver Date: Mon, 8 Oct 2018 18:49:41 -0500 Message-ID: <20181008234949.15416-4-grygorii.strashko@ti.com> X-Mailer: git-send-email 2.10.5 In-Reply-To: <20181008234949.15416-1-grygorii.strashko@ti.com> References: <20181008234949.15416-1-grygorii.strashko@ti.com> MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org TI am335x/am437x/dra7(am5)/dm814x CPSW3G Ethernet Subsystem supports two 10/100/1000 Ethernet ports with selectable G/MII, RMII, and RGMII interfaces. The interface mode is selected by configuring the MII mode selection register(s) (GMII_SEL) in the System Control Module chapter (SCM). GMII_SEL register(s) and bit fields placement in SCM are different between SoCs while fields meaning is the same. Historically CPSW external Port's interface mode selection configuartion was introduced using custom API and driver cpsw-phy-sel.c. This leads to unnecessary driver, DT binding and custom API support effort. This patch introduces CPSW Port's PHY Interface Mode selection Driver (phy-gmii-sel) which implements standard Linux PHY interface and proposed as a replacement for TI's specific driver cpsw-phy-sel.c and coresponding custom API. Cc: Kishon Vijay Abraham I Cc: Tony Lindgren Signed-off-by: Grygorii Strashko --- drivers/phy/ti/Kconfig | 10 ++ drivers/phy/ti/Makefile | 1 + drivers/phy/ti/phy-gmii-sel.c | 345 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 356 insertions(+) create mode 100644 drivers/phy/ti/phy-gmii-sel.c diff --git a/drivers/phy/ti/Kconfig b/drivers/phy/ti/Kconfig index 2050356..f137e01 100644 --- a/drivers/phy/ti/Kconfig +++ b/drivers/phy/ti/Kconfig @@ -76,3 +76,13 @@ config TWL4030_USB family chips (including the TWL5030 and TPS659x0 devices). This transceiver supports high and full speed devices plus, in host mode, low speed. + +config PHY_TI_GMII_SEL + tristate + default y if TI_CPSW=y + depends on TI_CPSW || COMPILE_TEST + select GENERIC_PHY + default m + help + This driver supports configuring of the TI CPSW Port mode depending on + the Ethernet PHY connected to the CPSW Port. diff --git a/drivers/phy/ti/Makefile b/drivers/phy/ti/Makefile index 9f36175..bea8f25 100644 --- a/drivers/phy/ti/Makefile +++ b/drivers/phy/ti/Makefile @@ -6,3 +6,4 @@ obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o +obj-$(CONFIG_PHY_TI_GMII_SEL) += phy-gmii-sel.o diff --git a/drivers/phy/ti/phy-gmii-sel.c b/drivers/phy/ti/phy-gmii-sel.c new file mode 100644 index 0000000..61a3aa1 --- /dev/null +++ b/drivers/phy/ti/phy-gmii-sel.c @@ -0,0 +1,345 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Texas Instruments CPSW Port's PHY Interface Mode selection Driver + * + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * + * Based on cpsw-phy-sel.c driver created by Mugunthan V N + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* AM33xx SoC specific definitions for the CONTROL port */ +#define AM33XX_GMII_SEL_MODE_MII 0 +#define AM33XX_GMII_SEL_MODE_RMII 1 +#define AM33XX_GMII_SEL_MODE_RGMII 2 + +enum { + PHY_GMII_SEL_PORT_MODE, + PHY_GMII_SEL_RGMII_ID_MODE, + PHY_GMII_SEL_RMII_IO_CLK_EN, + PHY_GMII_SEL_LAST, +}; + +struct phy_gmii_sel_phy_priv { + struct phy_gmii_sel_priv *priv; + u32 id; + struct phy *if_phy; + int rmii_clock_external; + int phy_if_mode; + struct regmap_field *fields[PHY_GMII_SEL_LAST]; +}; + +struct phy_gmii_sel_soc_data { + u32 num_ports; + u32 features; + const struct reg_field (*regfields)[PHY_GMII_SEL_LAST]; +}; + +struct phy_gmii_sel_priv { + struct device *dev; + const struct phy_gmii_sel_soc_data *soc_data; + struct regmap *regmap; + struct phy_provider *phy_provider; + + struct phy_gmii_sel_phy_priv *if_phys; +}; + +static int phy_gmii_sel_mode(struct phy *phy, phy_interface_t intf_mode) +{ + struct phy_gmii_sel_phy_priv *if_phy = phy_get_drvdata(phy); + const struct phy_gmii_sel_soc_data *soc_data = if_phy->priv->soc_data; + struct device *dev = if_phy->priv->dev; + struct regmap_field *regfield; + int ret, rgmii_id = 0; + u32 mode = 0; + + if_phy->phy_if_mode = intf_mode; + + switch (if_phy->phy_if_mode) { + case PHY_INTERFACE_MODE_RMII: + mode = AM33XX_GMII_SEL_MODE_RMII; + break; + + case PHY_INTERFACE_MODE_RGMII: + mode = AM33XX_GMII_SEL_MODE_RGMII; + break; + + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + mode = AM33XX_GMII_SEL_MODE_RGMII; + rgmii_id = 1; + break; + + default: + dev_warn(dev, + "port%u: unsupported mode: \"%s\". Defaulting to MII.\n", + if_phy->id, phy_modes(rgmii_id)); + /* fall through */ + case PHY_INTERFACE_MODE_MII: + mode = AM33XX_GMII_SEL_MODE_MII; + break; + }; + + dev_dbg(dev, "%s id:%u mode:%u rgmii_id:%d rmii_clk_ext:%d\n", + __func__, if_phy->id, mode, rgmii_id, + if_phy->rmii_clock_external); + + regfield = if_phy->fields[PHY_GMII_SEL_PORT_MODE]; + ret = regmap_field_write(regfield, mode); + + if (soc_data->features & BIT(PHY_GMII_SEL_RGMII_ID_MODE) && + if_phy->fields[PHY_GMII_SEL_RGMII_ID_MODE]) { + regfield = if_phy->fields[PHY_GMII_SEL_RGMII_ID_MODE]; + ret |= regmap_field_write(regfield, rgmii_id); + } + + if (soc_data->features & BIT(PHY_GMII_SEL_RMII_IO_CLK_EN) && + if_phy->fields[PHY_GMII_SEL_RMII_IO_CLK_EN]) { + regfield = if_phy->fields[PHY_GMII_SEL_RMII_IO_CLK_EN]; + ret |= regmap_field_write(regfield, + if_phy->rmii_clock_external); + } + + if (ret) { + dev_err(dev, "port%u: set mode fail %d", if_phy->id, ret); + return -EIO; + } + + return 0; +} + +static const +struct reg_field phy_gmii_sel_fields_am33xx[][PHY_GMII_SEL_LAST] = { + { + [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x650, 0, 1), + [PHY_GMII_SEL_RGMII_ID_MODE] = REG_FIELD(0x650, 4, 4), + [PHY_GMII_SEL_RMII_IO_CLK_EN] = REG_FIELD(0x650, 6, 6), + }, + { + [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x650, 2, 3), + [PHY_GMII_SEL_RGMII_ID_MODE] = REG_FIELD(0x650, 5, 5), + [PHY_GMII_SEL_RMII_IO_CLK_EN] = REG_FIELD(0x650, 7, 7), + }, +}; + +static const +struct phy_gmii_sel_soc_data phy_gmii_sel_soc_am33xx = { + .num_ports = 2, + .features = BIT(PHY_GMII_SEL_RGMII_ID_MODE) | + BIT(PHY_GMII_SEL_RMII_IO_CLK_EN), + .regfields = phy_gmii_sel_fields_am33xx, +}; + +static const +struct reg_field phy_gmii_sel_fields_dra7[][PHY_GMII_SEL_LAST] = { + { + [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x554, 0, 1), + [PHY_GMII_SEL_RGMII_ID_MODE] = REG_FIELD((~0), 0, 0), + [PHY_GMII_SEL_RMII_IO_CLK_EN] = REG_FIELD((~0), 0, 0), + }, + { + [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x554, 4, 5), + [PHY_GMII_SEL_RGMII_ID_MODE] = REG_FIELD((~0), 0, 0), + [PHY_GMII_SEL_RMII_IO_CLK_EN] = REG_FIELD((~0), 0, 0), + }, +}; + +static const +struct phy_gmii_sel_soc_data phy_gmii_sel_soc_dra7 = { + .num_ports = 2, + .regfields = phy_gmii_sel_fields_dra7, +}; + +static const +struct phy_gmii_sel_soc_data phy_gmii_sel_soc_dm814 = { + .num_ports = 2, + .features = BIT(PHY_GMII_SEL_RGMII_ID_MODE), + .regfields = phy_gmii_sel_fields_am33xx, +}; + +static const struct of_device_id phy_gmii_sel_id_table[] = { + { + .compatible = "ti,am3352-phy-gmii-sel", + .data = &phy_gmii_sel_soc_am33xx, + }, + { + .compatible = "ti,dra7xx-phy-gmii-sel", + .data = &phy_gmii_sel_soc_dra7, + }, + { + .compatible = "ti,am43xx-phy-gmii-sel", + .data = &phy_gmii_sel_soc_am33xx, + }, + { + .compatible = "ti,dm814-phy-gmii-sel", + .data = &phy_gmii_sel_soc_dm814, + }, + {} +}; +MODULE_DEVICE_TABLE(of, phy_gmii_sel_id_table); + +static const struct phy_ops phy_gmii_sel_ops = { + .set_netif_mode = phy_gmii_sel_mode, + .owner = THIS_MODULE, +}; + +static struct phy *phy_gmii_sel_of_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct phy_gmii_sel_priv *priv = dev_get_drvdata(dev); + int phy_id = args->args[0]; + + if (args->args_count < 1) + return ERR_PTR(-EINVAL); + if (priv->soc_data->features & BIT(PHY_GMII_SEL_RMII_IO_CLK_EN) && + args->args_count < 2) + return ERR_PTR(-EINVAL); + if (!priv || !priv->if_phys) + return ERR_PTR(-ENODEV); + if (phy_id > priv->soc_data->num_ports) + return ERR_PTR(-EINVAL); + if (phy_id != priv->if_phys[phy_id - 1].id) + return ERR_PTR(-EINVAL); + + phy_id--; + if (priv->soc_data->features & BIT(PHY_GMII_SEL_RMII_IO_CLK_EN)) + priv->if_phys[phy_id].rmii_clock_external = args->args[1]; + dev_dbg(dev, "%s id:%u ext:%d\n", __func__, + priv->if_phys[phy_id].id, args->args[1]); + + return priv->if_phys[phy_id].if_phy; +} + +static int phy_gmii_sel_init_ports(struct phy_gmii_sel_priv *priv) +{ + const struct phy_gmii_sel_soc_data *soc_data = priv->soc_data; + struct device *dev = priv->dev; + struct phy_gmii_sel_phy_priv *if_phys; + int i, num_ports, ret; + + num_ports = priv->soc_data->num_ports; + + if_phys = devm_kcalloc(priv->dev, num_ports, + sizeof(*if_phys), GFP_KERNEL); + if (!if_phys) + return -ENOMEM; + dev_dbg(dev, "%s %d\n", __func__, num_ports); + + for (i = 0; i < num_ports; i++) { + const struct reg_field *field; + struct regmap_field *regfield; + + if_phys[i].id = i + 1; + if_phys[i].priv = priv; + + field = &soc_data->regfields[i][PHY_GMII_SEL_PORT_MODE]; + dev_dbg(dev, "%s field %x %d %d\n", __func__, + field->reg, field->msb, field->lsb); + + regfield = devm_regmap_field_alloc(dev, priv->regmap, *field); + if (IS_ERR(regfield)) + return PTR_ERR(regfield); + if_phys[i].fields[PHY_GMII_SEL_PORT_MODE] = regfield; + + field = &soc_data->regfields[i][PHY_GMII_SEL_RGMII_ID_MODE]; + if (field->reg != (~0)) { + regfield = devm_regmap_field_alloc(dev, + priv->regmap, + *field); + if (IS_ERR(regfield)) + return PTR_ERR(regfield); + if_phys[i].fields[PHY_GMII_SEL_RGMII_ID_MODE] = + regfield; + } + + field = &soc_data->regfields[i][PHY_GMII_SEL_RMII_IO_CLK_EN]; + if (field->reg != (~0)) { + regfield = devm_regmap_field_alloc(dev, + priv->regmap, + *field); + if (IS_ERR(regfield)) + return PTR_ERR(regfield); + if_phys[i].fields[PHY_GMII_SEL_RMII_IO_CLK_EN] = + regfield; + } + + if_phys[i].if_phy = devm_phy_create(dev, + priv->dev->of_node, + &phy_gmii_sel_ops); + if (IS_ERR(if_phys[i].if_phy)) { + ret = PTR_ERR(if_phys[i].if_phy); + dev_err(dev, "Failed to create phy%d %d\n", i, ret); + return ret; + } + phy_set_drvdata(if_phys[i].if_phy, &if_phys[i]); + } + + priv->if_phys = if_phys; + return 0; +} + +static int phy_gmii_sel_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + const struct of_device_id *of_id; + struct phy_gmii_sel_priv *priv; + int ret; + + of_id = of_match_node(phy_gmii_sel_id_table, pdev->dev.of_node); + if (!of_id) + return -EINVAL; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &pdev->dev; + priv->soc_data = of_id->data; + + priv->regmap = syscon_regmap_lookup_by_phandle(node, "syscon-scm"); + if (IS_ERR(priv->regmap)) { + ret = PTR_ERR(priv->regmap); + dev_err(dev, "Failed to get syscon %d\n", ret); + return ret; + } + + ret = phy_gmii_sel_init_ports(priv); + if (ret) + return ret; + + dev_set_drvdata(&pdev->dev, priv); + + priv->phy_provider = + devm_of_phy_provider_register(dev, + phy_gmii_sel_of_xlate); + if (IS_ERR(priv->phy_provider)) { + ret = PTR_ERR(priv->phy_provider); + dev_err(dev, "Failed to create phy provider %d\n", ret); + return ret; + } + + return 0; +} + +static struct platform_driver phy_gmii_sel_driver = { + .probe = phy_gmii_sel_probe, + .driver = { + .name = "phy-gmii-sel", + .of_match_table = phy_gmii_sel_id_table, + }, +}; +module_platform_driver(phy_gmii_sel_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Grygorii Strashko "); +MODULE_DESCRIPTION("TI CPSW Port's PHY Interface Mode selection Driver"); -- 2.10.5