From patchwork Sun Aug 20 12:02:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 13358773 X-Patchwork-Delegate: kuba@kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4D0FC2573 for ; Sun, 20 Aug 2023 12:14:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4441DC433C9; Sun, 20 Aug 2023 12:14:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692533656; bh=Den5dFS0MXDAQfMUN5eWruNGI0pHi2wHRF4CX/oFhPU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WAWeleQQXgSnGBz+bKec0yrb1T+7jeNMDNsHql0UcfYmV0J77tSPOorMEJwMpeu6C AWHfiUp2W0gq60d3KViN4Iqg14fabrwtSp1W5XtuvHI8Ididi4UkRHvydQXFMSX82o pCN7l+cGuosKiNXqjyiX29D6KEVXvNGvtLpY6ck5hHGA4z2Cq44Zv1ysG3jVbhL9/M TLGWRRXeGMtv71YF2JoecVmuEOFK4JqYUNyK63ePNUOmsnDzUAd8nuFz1iOqbjexeP 01SGbXzbBTsZCp6MjeSZh6DwG82+UZOTNHWPUmkNJx6Cu6NsEQ+zvLMTpzZaDs8agH 7ifgar5a/FxKw== From: Jisheng Zhang To: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , Maxime Coquelin Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH net-next 3/3] net: stmmac: add glue layer for T-HEAD TH1520 SoC Date: Sun, 20 Aug 2023 20:02:13 +0800 Message-Id: <20230820120213.2054-4-jszhang@kernel.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230820120213.2054-1-jszhang@kernel.org> References: <20230820120213.2054-1-jszhang@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add dwmac glue driver to support the dwmac on the T-HEAD TH1520 SoC. Signed-off-by: Jisheng Zhang --- drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 + drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../net/ethernet/stmicro/stmmac/dwmac-thead.c | 304 ++++++++++++++++++ 3 files changed, 316 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 06c6871f8788..1bf71804c270 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -216,6 +216,17 @@ config DWMAC_SUN8I stmmac device driver. This driver is used for H3/A83T/A64 EMAC ethernet controller. +config DWMAC_THEAD + tristate "T-HEAD dwmac support" + depends on OF && (ARCH_THEAD || COMPILE_TEST) + select MFD_SYSCON + help + Support for ethernet controllers on T-HEAD RISC-V SoCs + + This selects the T-HEAD platform specific glue layer support for + the stmmac device driver. This driver is used for T-HEAD TH1520 + ethernet controller. + config DWMAC_IMX8 tristate "NXP IMX8 DWMAC support" default ARCH_MXC diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 5b57aee19267..d73171ed6ad7 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o obj-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o obj-$(CONFIG_DWMAC_SUN8I) += dwmac-sun8i.o +obj-$(CONFIG_DWMAC_THEAD) += dwmac-thead.o obj-$(CONFIG_DWMAC_DWC_QOS_ETH) += dwmac-dwc-qos-eth.o obj-$(CONFIG_DWMAC_INTEL_PLAT) += dwmac-intel-plat.o obj-$(CONFIG_DWMAC_GENERIC) += dwmac-generic.o diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c new file mode 100644 index 000000000000..1a5a174b88ff --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c @@ -0,0 +1,304 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * T-HEAD DWMAC platform driver + * + * Copyright (C) 2023 Jisheng Zhang + * Copyright (C) 2021 Alibaba Group Holding Limited. + * + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "stmmac_platform.h" + +#define GMAC_CLK_EN 0x00 +#define GMAC_TX_CLK_EN BIT(1) +#define GMAC_TX_CLK_N_EN BIT(2) +#define GMAC_TX_CLK_OUT_EN BIT(3) +#define GMAC_RX_CLK_EN BIT(4) +#define GMAC_RX_CLK_N_EN BIT(5) +#define GMAC_EPHY_REF_CLK_EN BIT(6) +#define GMAC_RXCLK_DELAY_CTRL 0x04 +#define GMAC_RXCLK_BYPASS BIT(15) +#define GMAC_RXCLK_INVERT BIT(14) +#define GMAC_RXCLK_DELAY_MASK GENMASK(4, 0) +#define GMAC_RXCLK_DELAY_VAL(x) FIELD_PREP(GMAC_RXCLK_DELAY_MASK, (x)) +#define GMAC_TXCLK_DELAY_CTRL 0x08 +#define GMAC_TXCLK_BYPASS BIT(15) +#define GMAC_TXCLK_INVERT BIT(14) +#define GMAC_TXCLK_DELAY_MASK GENMASK(4, 0) +#define GMAC_TXCLK_DELAY_VAL(x) FIELD_PREP(GMAC_RXCLK_DELAY_MASK, (x)) +#define GMAC_PLLCLK_DIV 0x0c +#define GMAC_PLLCLK_DIV_EN BIT(31) +#define GMAC_PLLCLK_DIV_MASK GENMASK(7, 0) +#define GMAC_PLLCLK_DIV_NUM(x) FIELD_PREP(GMAC_PLLCLK_DIV_MASK, (x)) +#define GMAC_GTXCLK_SEL 0x18 +#define GMAC_GTXCLK_SEL_PLL BIT(0) +#define GMAC_INTF_CTRL 0x1c +#define PHY_INTF_MASK BIT(0) +#define PHY_INTF_RGMII FIELD_PREP(PHY_INTF_MASK, 1) +#define PHY_INTF_MII_GMII FIELD_PREP(PHY_INTF_MASK, 0) +#define GMAC_TXCLK_OEN 0x20 +#define TXCLK_DIR_MASK BIT(0) +#define TXCLK_DIR_OUTPUT FIELD_PREP(TXCLK_DIR_MASK, 0) +#define TXCLK_DIR_INPUT FIELD_PREP(TXCLK_DIR_MASK, 1) + +#define GMAC_GMII_RGMII_RATE 125000000 +#define GMAC_MII_RATE 25000000 + +struct thead_dwmac { + struct plat_stmmacenet_data *plat; + struct regmap *apb_regmap; + struct device *dev; + struct clk *clk_axi; + u32 rx_delay; + u32 tx_delay; +}; + +static int thead_dwmac_set_phy_if(struct plat_stmmacenet_data *plat) +{ + struct thead_dwmac *dwmac = plat->bsp_priv; + u32 phyif; + + switch (plat->interface) { + case PHY_INTERFACE_MODE_MII: + phyif = PHY_INTF_MII_GMII; + break; + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_TXID: + case PHY_INTERFACE_MODE_RGMII_RXID: + phyif = PHY_INTF_RGMII; + break; + default: + dev_err(dwmac->dev, "unsupported phy interface %d\n", + plat->interface); + return -EINVAL; + }; + + regmap_write(dwmac->apb_regmap, GMAC_INTF_CTRL, phyif); + + return 0; +} + +static int thead_dwmac_set_txclk_dir(struct plat_stmmacenet_data *plat) +{ + struct thead_dwmac *dwmac = plat->bsp_priv; + u32 txclk_dir;; + + switch (plat->interface) { + case PHY_INTERFACE_MODE_MII: + txclk_dir = TXCLK_DIR_INPUT; + break; + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_TXID: + case PHY_INTERFACE_MODE_RGMII_RXID: + txclk_dir = TXCLK_DIR_OUTPUT; + break; + default: + dev_err(dwmac->dev, "unsupported phy interface %d\n", + plat->interface); + return -EINVAL; + }; + + regmap_write(dwmac->apb_regmap, GMAC_TXCLK_OEN, txclk_dir); + + return 0; +} + +static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int mode) +{ + struct thead_dwmac *dwmac = priv; + struct plat_stmmacenet_data *plat = dwmac->plat; + unsigned long rate; + u32 div; + + switch (plat->interface) { + /* For MII, rxc/txc is provided by phy */ + case PHY_INTERFACE_MODE_MII: + return; + + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + rate = clk_get_rate(plat->stmmac_clk); + if (!rate || rate % GMAC_GMII_RGMII_RATE != 0 || + rate % GMAC_MII_RATE != 0) { + dev_err(dwmac->dev, "invalid gmac rate %ld\n", rate); + return; + } + + regmap_update_bits(dwmac->apb_regmap, GMAC_PLLCLK_DIV, GMAC_PLLCLK_DIV_EN, 0); + + switch (speed) { + case SPEED_1000: + div = rate / GMAC_GMII_RGMII_RATE; + break; + case SPEED_100: + div = rate / GMAC_MII_RATE; + break; + case SPEED_10: + div = rate * 10 / GMAC_MII_RATE; + break; + default: + dev_err(dwmac->dev, "invalid speed %u\n", speed); + break; + } + regmap_update_bits(dwmac->apb_regmap, GMAC_PLLCLK_DIV, + GMAC_PLLCLK_DIV_MASK, GMAC_PLLCLK_DIV_NUM(div)); + + regmap_update_bits(dwmac->apb_regmap, GMAC_PLLCLK_DIV, + GMAC_PLLCLK_DIV_EN, GMAC_PLLCLK_DIV_EN); + break; + default: + dev_err(dwmac->dev, "unsupported phy interface %d\n", + plat->interface); + return; + } +} + +static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) +{ + struct thead_dwmac *dwmac = plat->bsp_priv; + u32 reg; + + switch (plat->interface) { + case PHY_INTERFACE_MODE_MII: + reg = GMAC_RX_CLK_EN | GMAC_TX_CLK_EN; + break; + + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + /* use pll */ + regmap_write(dwmac->apb_regmap, GMAC_GTXCLK_SEL, GMAC_GTXCLK_SEL_PLL); + + reg = GMAC_TX_CLK_EN | GMAC_TX_CLK_N_EN | GMAC_TX_CLK_OUT_EN | + GMAC_RX_CLK_EN | GMAC_RX_CLK_N_EN; + break; + + default: + dev_err(dwmac->dev, "unsupported phy interface %d\n", + plat->interface); + return -EINVAL; + } + + regmap_write(dwmac->apb_regmap, GMAC_CLK_EN, reg); + + return 0; +} + +static int thead_dwmac_init(struct platform_device *pdev, + struct plat_stmmacenet_data *plat) +{ + struct thead_dwmac *dwmac = plat->bsp_priv; + int ret; + + ret = thead_dwmac_set_phy_if(plat); + if (ret) + return ret; + + ret = thead_dwmac_set_txclk_dir(plat); + if (ret) + return ret; + + regmap_write(dwmac->apb_regmap, GMAC_RXCLK_DELAY_CTRL, + GMAC_RXCLK_DELAY_VAL(dwmac->rx_delay)); + regmap_write(dwmac->apb_regmap, GMAC_TXCLK_DELAY_CTRL, + GMAC_TXCLK_DELAY_VAL(dwmac->tx_delay)); + + thead_dwmac_fix_speed(dwmac, SPEED_1000, 0); + + return thead_dwmac_enable_clk(plat); +} + +static int thead_dwmac_probe(struct platform_device *pdev) +{ + struct plat_stmmacenet_data *plat; + struct stmmac_resources stmmac_res; + struct thead_dwmac *dwmac; + struct device_node *np = pdev->dev.of_node; + u32 delay_ps; + int ret; + + ret = stmmac_get_platform_resources(pdev, &stmmac_res); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "failed to get resources\n"); + + plat = stmmac_probe_config_dt(pdev, stmmac_res.mac); + if (IS_ERR(plat)) + return dev_err_probe(&pdev->dev, PTR_ERR(plat), + "dt configuration failed\n"); + + dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL); + if (!dwmac) + return -ENOMEM; + + dwmac->clk_axi = devm_clk_get_enabled(&pdev->dev, "axi"); + if (IS_ERR(dwmac->clk_axi)) + return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->clk_axi), + "error getting axi clock\n"); + + if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay_ps)) + dwmac->rx_delay = delay_ps; + if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay_ps)) + dwmac->tx_delay = delay_ps; + + dwmac->apb_regmap = syscon_regmap_lookup_by_phandle(np, "thead,gmacapb"); + if (IS_ERR(dwmac->apb_regmap)) { + dev_err(&pdev->dev, "Failed to get gmac apb syscon\n"); + return PTR_ERR(dwmac->apb_regmap); + } + + dwmac->dev = &pdev->dev; + dwmac->plat = plat; + plat->bsp_priv = dwmac; + plat->fix_mac_speed = thead_dwmac_fix_speed; + + ret = thead_dwmac_init(pdev, plat); + if (ret) + goto err_dvr_probe; + + ret = stmmac_dvr_probe(&pdev->dev, plat, &stmmac_res); + if (ret) + goto err_dvr_probe; + + return 0; + +err_dvr_probe: + stmmac_remove_config_dt(pdev, plat); + + return ret; +} + +static const struct of_device_id thead_dwmac_match[] = { + { .compatible = "thead,th1520-dwmac" }, + { } +}; +MODULE_DEVICE_TABLE(of, thead_dwmac_match); + +static struct platform_driver thead_dwmac_driver = { + .probe = thead_dwmac_probe, + .remove_new = stmmac_pltfr_remove, + .driver = { + .name = "thead-dwmac", + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = thead_dwmac_match, + }, +}; +module_platform_driver(thead_dwmac_driver); + +MODULE_AUTHOR("T-HEAD"); +MODULE_AUTHOR("Jisheng Zhang "); +MODULE_DESCRIPTION("T-HEAD dwmac platform driver"); +MODULE_LICENSE("GPL");