[v2,3/4] net: stmmac: Add glue layer for Loongson-1 SoC

Message ID	20230816111310.1656224-4-keguang.zhang@gmail.com (mailing list archive)
State	Superseded
Headers	show Return-Path: <linux-mips-owner@vger.kernel.org> From: Keguang Zhang <keguang.zhang@gmail.com> To: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lee Jones <lee@kernel.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, "David S . Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Giuseppe Cavallaro <peppe.cavallaro@st.com>, Alexandre Torgue <alexandre.torgue@foss.st.com>, Jose Abreu <joabreu@synopsys.com>, Serge Semin <Sergey.Semin@baikalelectronics.ru>, Keguang Zhang <keguang.zhang@gmail.com> Subject: [PATCH v2 3/4] net: stmmac: Add glue layer for Loongson-1 SoC Date: Wed, 16 Aug 2023 19:13:09 +0800 Message-Id: <20230816111310.1656224-4-keguang.zhang@gmail.com> In-Reply-To: <20230816111310.1656224-1-keguang.zhang@gmail.com> References: <20230816111310.1656224-1-keguang.zhang@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Move Loongson1 MAC arch-code to the driver dir \| expand [v2,0/4] Move Loongson1 MAC arch-code to the driver dir [v2,1/4] dt-bindings: mfd: syscon: Add compatibles for Loongson-1 syscon [v2,2/4] dt-bindings: net: Add Loongson-1 DWMAC glue layer [v2,3/4] net: stmmac: Add glue layer for Loongson-1 SoC [v2,4/4] MAINTAINERS: Update MIPS/LOONGSON1 entry

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..5210b5e8ae47 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c @@ -0,0 +1,273 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Loongson-1 DWMAC glue layer + * + * Copyright (C) 2011-2023 Keguang Zhang <keguang.zhang@gmail.com> + */ + +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/phy.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include "stmmac.h" +#include "stmmac_platform.h" + +/* Loongson-1 SYSCON Registers */ +#define LS1X_SYSCON0 (0x0) +#define LS1X_SYSCON1 (0x4) + +struct ls1x_dwmac_syscon { + const struct reg_field *reg_fields; + unsigned int nr_reg_fields; + int (*syscon_init)(struct plat_stmmacenet_data *plat); +}; + +struct ls1x_dwmac { + struct device *dev; + struct plat_stmmacenet_data *plat_dat; + const struct ls1x_dwmac_syscon *syscon; + struct regmap *regmap; + struct regmap_field *regmap_fields[]; +}; + +enum ls1b_dwmac_syscon_regfield { + GMAC1_USE_UART1, + GMAC1_USE_UART0, + GMAC1_SHUT, + GMAC0_SHUT, + GMAC1_USE_TXCLK, + GMAC0_USE_TXCLK, + GMAC1_USE_PWM23, + GMAC0_USE_PWM01, +}; + +enum ls1c_dwmac_syscon_regfield { + GMAC_SHUT, + PHY_INTF_SELI, +}; + +static const struct reg_field ls1b_dwmac_syscon_regfields[] = { + [GMAC1_USE_UART1] = REG_FIELD(LS1X_SYSCON0, 4, 4), + [GMAC1_USE_UART0] = REG_FIELD(LS1X_SYSCON0, 3, 3), + [GMAC1_SHUT] = REG_FIELD(LS1X_SYSCON1, 13, 13), + [GMAC0_SHUT] = REG_FIELD(LS1X_SYSCON1, 12, 12), + [GMAC1_USE_TXCLK] = REG_FIELD(LS1X_SYSCON1, 3, 3), + [GMAC0_USE_TXCLK] = REG_FIELD(LS1X_SYSCON1, 2, 2), + [GMAC1_USE_PWM23] = REG_FIELD(LS1X_SYSCON1, 1, 1), + [GMAC0_USE_PWM01] = REG_FIELD(LS1X_SYSCON1, 0, 0) +}; + +static const struct reg_field ls1c_dwmac_syscon_regfields[] = { + [GMAC_SHUT] = REG_FIELD(LS1X_SYSCON0, 6, 6), + [PHY_INTF_SELI] = REG_FIELD(LS1X_SYSCON1, 28, 30) +}; + +static int ls1b_dwmac_syscon_init(struct plat_stmmacenet_data *plat) +{ + struct ls1x_dwmac *dwmac = plat->bsp_priv; + struct regmap_field **regmap_fields = dwmac->regmap_fields; + + if (plat->bus_id) { + regmap_field_write(regmap_fields[GMAC1_USE_UART1], 1); + regmap_field_write(regmap_fields[GMAC1_USE_UART0], 1); + + switch (plat->phy_interface) { + case PHY_INTERFACE_MODE_RGMII: + regmap_field_write(regmap_fields[GMAC1_USE_TXCLK], 0); + regmap_field_write(regmap_fields[GMAC1_USE_PWM23], 0); + break; + case PHY_INTERFACE_MODE_MII: + regmap_field_write(regmap_fields[GMAC1_USE_TXCLK], 1); + regmap_field_write(regmap_fields[GMAC1_USE_PWM23], 1); + break; + default: + dev_err(dwmac->dev, "Unsupported PHY mode %u\n", + plat->phy_interface); + return -EOPNOTSUPP; + } + + regmap_field_write(regmap_fields[GMAC1_SHUT], 0); + } else { + switch (plat->phy_interface) { + case PHY_INTERFACE_MODE_RGMII: + regmap_field_write(regmap_fields[GMAC0_USE_TXCLK], 0); + regmap_field_write(regmap_fields[GMAC0_USE_PWM01], 0); + break; + case PHY_INTERFACE_MODE_MII: + regmap_field_write(regmap_fields[GMAC0_USE_TXCLK], 1); + regmap_field_write(regmap_fields[GMAC0_USE_PWM01], 1); + break; + default: + dev_err(dwmac->dev, "Unsupported PHY mode %u\n", + plat->phy_interface); + return -EOPNOTSUPP; + } + + regmap_field_write(regmap_fields[GMAC0_SHUT], 0); + } + + return 0; +} + +static int ls1c_dwmac_syscon_init(struct plat_stmmacenet_data *plat) +{ + struct ls1x_dwmac *dwmac = plat->bsp_priv; + struct regmap_field **regmap_fields = dwmac->regmap_fields; + + switch (plat->phy_interface) { + case PHY_INTERFACE_MODE_MII: + regmap_field_write(regmap_fields[PHY_INTF_SELI], 0); + break; + case PHY_INTERFACE_MODE_RMII: + regmap_field_write(regmap_fields[PHY_INTF_SELI], 4); + break; + default: + dev_err(dwmac->dev, "Unsupported PHY-mode %u\n", + plat->phy_interface); + return -EOPNOTSUPP; + } + + regmap_field_write(regmap_fields[GMAC_SHUT], 0); + + return 0; +} + +static const struct ls1x_dwmac_syscon ls1b_dwmac_syscon = { + .reg_fields = ls1b_dwmac_syscon_regfields, + .nr_reg_fields = ARRAY_SIZE(ls1b_dwmac_syscon_regfields), + .syscon_init = ls1b_dwmac_syscon_init, +}; + +static const struct ls1x_dwmac_syscon ls1c_dwmac_syscon = { + .reg_fields = ls1c_dwmac_syscon_regfields, + .nr_reg_fields = ARRAY_SIZE(ls1c_dwmac_syscon_regfields), + .syscon_init = ls1c_dwmac_syscon_init, +}; + +static int ls1x_dwmac_init(struct platform_device *pdev, void *priv) +{ + struct ls1x_dwmac *dwmac = priv; + int ret; + + ret = devm_regmap_field_bulk_alloc(dwmac->dev, dwmac->regmap, + dwmac->regmap_fields, + dwmac->syscon->reg_fields, + dwmac->syscon->nr_reg_fields); + if (ret) + return ret; + + if (dwmac->syscon->syscon_init) { + ret = dwmac->syscon->syscon_init(dwmac->plat_dat); + if (ret) + return ret; + } + + return 0; +} + +static const struct of_device_id ls1x_dwmac_syscon_match[] = { + { + .compatible = "loongson,ls1b-dwmac-syscon", + .data = &ls1b_dwmac_syscon, + }, + { + .compatible = "loongson,ls1c-dwmac-syscon", + .data = &ls1c_dwmac_syscon, + }, + { } +}; + +static int ls1x_dwmac_probe(struct platform_device *pdev) +{ + struct plat_stmmacenet_data *plat_dat; + struct stmmac_resources stmmac_res; + struct device_node *syscon_np; + const struct of_device_id *match; + struct regmap *regmap; + struct ls1x_dwmac *dwmac; + const struct ls1x_dwmac_syscon *syscon; + size_t size; + int ret; + + ret = stmmac_get_platform_resources(pdev, &stmmac_res); + if (ret) + return ret; + + /* Probe syscon */ + syscon_np = + of_parse_phandle(pdev->dev.of_node, "loongson,dwmac-syscon", 0); + if (!syscon_np) { + dev_err(&pdev->dev, "missing loongson,dwmac-syscon property\n"); + return -ENODEV; + } + + match = of_match_node(ls1x_dwmac_syscon_match, syscon_np); + if (!match) { + dev_err(&pdev->dev, "no matching node found in dtb\n"); + of_node_put(syscon_np); + return -EINVAL; + } + syscon = (const struct ls1x_dwmac_syscon *)match->data; + + regmap = syscon_node_to_regmap(syscon_np); + of_node_put(syscon_np); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(&pdev->dev, "Unable to map syscon: %d\n", ret); + return ret; + } + + size = syscon->nr_reg_fields * sizeof(struct regmap_field *); + dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac) + size, GFP_KERNEL); + if (!dwmac) + return -ENOMEM; + + plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac); + if (IS_ERR(plat_dat)) { + dev_err(&pdev->dev, "dt configuration failed\n"); + return PTR_ERR(plat_dat); + } + + plat_dat->bsp_priv = dwmac; + plat_dat->init = ls1x_dwmac_init; + dwmac->dev = &pdev->dev; + dwmac->plat_dat = plat_dat; + dwmac->syscon = syscon; + 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: + if (pdev->dev.of_node) + stmmac_remove_config_dt(pdev, plat_dat); + + return ret; +} + +static const struct of_device_id ls1x_dwmac_match[] = { + { .compatible = "loongson,ls1b-dwmac" }, + { .compatible = "loongson,ls1c-dwmac" }, + { } +}; +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 <keguang.zhang@gmail.com>"); +MODULE_DESCRIPTION("Loongson1 DWMAC glue layer"); +MODULE_LICENSE("GPL");

[v2,3/4] net: stmmac: Add glue layer for Loongson-1 SoC

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