From patchwork Wed Aug 30 13:42:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keguang Zhang X-Patchwork-Id: 13370666 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31B13C83F19 for ; Wed, 30 Aug 2023 18:56:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343964AbjH3S4P (ORCPT ); Wed, 30 Aug 2023 14:56:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55442 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244688AbjH3NnK (ORCPT ); Wed, 30 Aug 2023 09:43:10 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 929B1A3; Wed, 30 Aug 2023 06:43:07 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1c0bae4da38so6593425ad.0; Wed, 30 Aug 2023 06:43:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693402987; x=1694007787; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=zUnaYcHdg78olKUiBYZxRGGudCm0BIz7EXgTZrFFlmM=; b=e4cIkydFceJXrnuled5mJvSSAtXQJxVKN4TTLBi1Y9Earn1EZR/Gz6LMhB3/lhBbUG H7+htQEIJKU4N4TU7txdZ+CGQbC4Bx2jmo4yx6MSpezRGTHBmJpmZMPEJ16rlqdvrNw2 BfoNKjX3lCVbL5hyNpBe5NMD0vkoSw7UFt9clhgycurnGOsVmf7PJFpJTiOy0Yr8Dy14 zmcqOhTWGcZBT1N9Dc7yrpkK5QgA1uyY7emzzPmDmHeDvbxn11gmadWzEbHMnSezTyiC XttSrze0vRdg73zHAf5RdBqpFUVZeFYAHyQa/QzdMYCWg2AfdSOYvMRlyFDEdzEx3FO+ dBng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693402987; x=1694007787; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zUnaYcHdg78olKUiBYZxRGGudCm0BIz7EXgTZrFFlmM=; b=CZx0+2nlPhXHrptUqk2TTNV1Lt80uPfY+/PneJCsd9qAwKnyoh9wVocoSZMdcQPdwh MLPR+QRi7Yw8ccB5iTdBTo3tnXO+bnUcTaXavaOtf6a6y3yaTIVHwVyEuACe2onW4HJr RlQDNjkTjz/gD16YBbGfwKRXyByW75qipafFnudUumlaGBjTLD7xiuG7m3mQbYTBndSK j6qEMVl/Q2GCtUvFhEDebWR0decJ2OtXZQzkR3HdUTunBz2RFuZu+1PslOTkOqNxIvcC Gz8hPlKy0YgVbYwYN7cAGnDfiYJmwrF9qu76f7LzTTr5HjXVc59p5sVEG2uT0G/3hxm/ 8//A== X-Gm-Message-State: AOJu0YwL+wPdMyyPqxwGleYYO/2E2N3+HAjtSyHLBqoesK1+fSPmjX3w 9LRRJYgkFsGngqAi09mcg497m8Wmi9uV3xez X-Google-Smtp-Source: AGHT+IEtePLz1/bsMfnU+XPeeJU35uBsu0Zi8cUSQDpkzMeKQ3hkFOTDXEXNkaTTvht8/3NyxylbRQ== X-Received: by 2002:a17:902:f0ca:b0:1bd:dbec:8673 with SMTP id v10-20020a170902f0ca00b001bddbec8673mr6987592pla.11.1693402986533; Wed, 30 Aug 2023 06:43:06 -0700 (PDT) Received: from kelvin-ThinkPad-L14-Gen-1.lan ([103.184.129.7]) by smtp.gmail.com with ESMTPSA id a11-20020a170902eccb00b001b86dd825e7sm11042280plh.108.2023.08.30.06.43.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Aug 2023 06:43:06 -0700 (PDT) From: Keguang Zhang To: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Thomas Bogendoerfer , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , Serge Semin , Keguang Zhang Subject: [PATCH v4 3/4] net: stmmac: Add glue layer for Loongson-1 SoC Date: Wed, 30 Aug 2023 21:42:40 +0800 Message-Id: <20230830134241.506464-4-keguang.zhang@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230830134241.506464-1-keguang.zhang@gmail.com> References: <20230830134241.506464-1-keguang.zhang@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org This glue driver is created based on the arch-code implemented earlier with the platform-specific settings. Use syscon for SYSCON register access. Partially based on the previous work by Serge Semin. Signed-off-by: Keguang Zhang --- V3 -> V4: Drop ls1x_dwmac_syscon definition and its instances Drop three redundant fields from the ls1x_dwmac structure Drop the ls1x_dwmac_init() method. Some minor improvements V2 -> V3: Determine the device ID by physical base address(suggested by Serge Semin) Use regmap instead of regmap fields Use syscon_regmap_lookup_by_phandle() Some minor fixes V1 -> V2: Fix the build errors due to CONFIG_OF being unset Change struct reg_field definitions to const Rename the syscon property to "loongson,dwmac-syscon" Add MII PHY mode for LS1C drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 + drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../ethernet/stmicro/stmmac/dwmac-loongson1.c | 219 ++++++++++++++++++ 3 files changed, 231 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 06c6871f8788..a2b9e289aa36 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -239,6 +239,17 @@ config DWMAC_INTEL_PLAT the stmmac device driver. This driver is used for the Intel Keem Bay SoC. +config DWMAC_LOONGSON1 + tristate "Loongson1 GMAC support" + default MACH_LOONGSON32 + depends on OF && (MACH_LOONGSON32 || COMPILE_TEST) + help + Support for ethernet controller on Loongson1 SoC. + + This selects Loongson1 SoC glue layer support for the stmmac + device driver. This driver is used for Loongson1-based boards + like Loongson LS1B/LS1C. + config DWMAC_TEGRA tristate "NVIDIA Tegra MGBE support" depends on ARCH_TEGRA || COMPILE_TEST diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 5b57aee19267..80e598bd4255 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o obj-$(CONFIG_DWMAC_SUN8I) += dwmac-sun8i.o obj-$(CONFIG_DWMAC_DWC_QOS_ETH) += dwmac-dwc-qos-eth.o obj-$(CONFIG_DWMAC_INTEL_PLAT) += dwmac-intel-plat.o +obj-$(CONFIG_DWMAC_LOONGSON1) += dwmac-loongson1.o obj-$(CONFIG_DWMAC_GENERIC) += dwmac-generic.o obj-$(CONFIG_DWMAC_IMX8) += dwmac-imx.o obj-$(CONFIG_DWMAC_TEGRA) += dwmac-tegra.o diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c new file mode 100644 index 000000000000..f1732f15ff87 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c @@ -0,0 +1,219 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Loongson-1 DWMAC glue layer + * + * Copyright (C) 2011-2023 Keguang Zhang + */ + +#include +#include +#include +#include +#include +#include + +#include "stmmac.h" +#include "stmmac_platform.h" + +#define LS1B_GMAC0_BASE (0x1fe10000) +#define LS1B_GMAC1_BASE (0x1fe20000) + +/* Loongson-1 SYSCON Registers */ +#define LS1X_SYSCON0 (0x0) +#define LS1X_SYSCON1 (0x4) + +/* Loongson-1B SYSCON Register Bits */ +#define GMAC1_USE_UART1 BIT(4) +#define GMAC1_USE_UART0 BIT(3) + +#define GMAC1_SHUT BIT(13) +#define GMAC0_SHUT BIT(12) + +#define GMAC1_USE_TXCLK BIT(3) +#define GMAC0_USE_TXCLK BIT(2) +#define GMAC1_USE_PWM23 BIT(1) +#define GMAC0_USE_PWM01 BIT(0) + +/* Loongson-1C SYSCON Register Bits */ +#define GMAC_SHUT BIT(6) + +#define PHY_INTF_SELI GENMASK(30, 28) +#define PHY_INTF_MII FIELD_PREP(PHY_INTF_SELI, 0) +#define PHY_INTF_RMII FIELD_PREP(PHY_INTF_SELI, 4) + +struct ls1x_dwmac { + struct plat_stmmacenet_data *plat_dat; + struct regmap *regmap; +}; + +static int ls1b_dwmac_syscon_init(struct platform_device *pdev, void *priv) +{ + struct ls1x_dwmac *dwmac = priv; + struct plat_stmmacenet_data *plat = dwmac->plat_dat; + struct regmap *regmap = dwmac->regmap; + struct resource *res; + unsigned long reg_base; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "Could not get IO_MEM resources\n"); + return -EINVAL; + } + reg_base = (unsigned long)res->start; + + if (reg_base == LS1B_GMAC0_BASE) { + switch (plat->phy_interface) { + case PHY_INTERFACE_MODE_RGMII_ID: + regmap_update_bits(regmap, LS1X_SYSCON0, + GMAC0_USE_TXCLK | GMAC0_USE_PWM01, + 0); + break; + case PHY_INTERFACE_MODE_MII: + regmap_update_bits(regmap, LS1X_SYSCON0, + GMAC0_USE_TXCLK | GMAC0_USE_PWM01, + GMAC0_USE_TXCLK | GMAC0_USE_PWM01); + break; + default: + dev_err(&pdev->dev, "Unsupported PHY mode %u\n", + plat->phy_interface); + return -EOPNOTSUPP; + } + + regmap_update_bits(regmap, LS1X_SYSCON0, GMAC0_SHUT, 0); + } else if (reg_base == LS1B_GMAC1_BASE) { + regmap_update_bits(regmap, LS1X_SYSCON0, + GMAC1_USE_UART1 | GMAC1_USE_UART0, + GMAC1_USE_UART1 | GMAC1_USE_UART0); + + switch (plat->phy_interface) { + case PHY_INTERFACE_MODE_RGMII_ID: + regmap_update_bits(regmap, LS1X_SYSCON1, + GMAC1_USE_TXCLK | GMAC1_USE_PWM23, + 0); + + break; + case PHY_INTERFACE_MODE_MII: + regmap_update_bits(regmap, LS1X_SYSCON1, + GMAC1_USE_TXCLK | GMAC1_USE_PWM23, + GMAC1_USE_TXCLK | GMAC1_USE_PWM23); + break; + default: + dev_err(&pdev->dev, "Unsupported PHY mode %u\n", + plat->phy_interface); + return -EOPNOTSUPP; + } + + regmap_update_bits(regmap, LS1X_SYSCON1, GMAC1_SHUT, 0); + } else { + dev_err(&pdev->dev, "Invalid Ethernet MAC base address %lx", + reg_base); + return -EINVAL; + } + + return 0; +} + +static int ls1c_dwmac_syscon_init(struct platform_device *pdev, void *priv) +{ + struct ls1x_dwmac *dwmac = priv; + struct plat_stmmacenet_data *plat = dwmac->plat_dat; + struct regmap *regmap = dwmac->regmap; + + switch (plat->phy_interface) { + case PHY_INTERFACE_MODE_MII: + regmap_update_bits(regmap, LS1X_SYSCON1, PHY_INTF_SELI, + PHY_INTF_MII); + break; + case PHY_INTERFACE_MODE_RMII: + regmap_update_bits(regmap, LS1X_SYSCON1, PHY_INTF_SELI, + PHY_INTF_RMII); + break; + default: + dev_err(&pdev->dev, "Unsupported PHY-mode %u\n", + plat->phy_interface); + return -EOPNOTSUPP; + } + + regmap_update_bits(regmap, LS1X_SYSCON0, GMAC0_SHUT, 0); + + return 0; +} + +static int ls1x_dwmac_probe(struct platform_device *pdev) +{ + struct plat_stmmacenet_data *plat_dat; + struct stmmac_resources stmmac_res; + struct regmap *regmap; + struct ls1x_dwmac *dwmac; + int (*init)(struct platform_device *pdev, void *priv); + int ret; + + ret = stmmac_get_platform_resources(pdev, &stmmac_res); + if (ret) + return ret; + + /* Probe syscon */ + regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "loongson,ls1-syscon"); + if (IS_ERR(regmap)) + return dev_err_probe(&pdev->dev, PTR_ERR(regmap), + "Unable to find syscon\n"); + + init = of_device_get_match_data(&pdev->dev); + if (!init) { + dev_err(&pdev->dev, "No of match data provided\n"); + return -EINVAL; + } + + dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL); + if (!dwmac) + return -ENOMEM; + + plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac); + if (IS_ERR(plat_dat)) + return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat), + "dt configuration failed\n"); + + plat_dat->bsp_priv = dwmac; + plat_dat->init = init; + dwmac->plat_dat = plat_dat; + dwmac->regmap = regmap; + + ret = stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res); + if (ret) + goto err_remove_config_dt; + + return 0; + +err_remove_config_dt: + stmmac_remove_config_dt(pdev, plat_dat); + + return ret; +} + +static const struct of_device_id ls1x_dwmac_match[] = { + { + .compatible = "loongson,ls1b-gmac", + .data = &ls1b_dwmac_syscon_init, + }, + { + .compatible = "loongson,ls1c-emac", + .data = &ls1c_dwmac_syscon_init, + }, + { } +}; +MODULE_DEVICE_TABLE(of, ls1x_dwmac_match); + +static struct platform_driver ls1x_dwmac_driver = { + .probe = ls1x_dwmac_probe, + .remove_new = stmmac_pltfr_remove, + .driver = { + .name = "loongson1-dwmac", + .of_match_table = ls1x_dwmac_match, + }, +}; +module_platform_driver(ls1x_dwmac_driver); + +MODULE_AUTHOR("Keguang Zhang "); +MODULE_DESCRIPTION("Loongson-1 DWMAC glue layer"); +MODULE_LICENSE("GPL");