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[71.34.69.82]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e5ad355bebsm2337008a91.7.2024.10.20.19.36.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Oct 2024 19:36:55 -0700 (PDT) From: Drew Fustini Date: Sun, 20 Oct 2024 19:36:01 -0700 Subject: [PATCH net-next v4 2/3] net: stmmac: Add glue layer for T-HEAD TH1520 SoC MIME-Version: 1.0 Message-Id: <20241020-th1520-dwmac-v4-2-c77acd33ccef@tenstorrent.com> References: <20241020-th1520-dwmac-v4-0-c77acd33ccef@tenstorrent.com> In-Reply-To: <20241020-th1520-dwmac-v4-0-c77acd33ccef@tenstorrent.com> To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexandre Torgue , Giuseppe Cavallaro , Jose Abreu , Maxime Coquelin , Emil Renner Berthing , Jisheng Zhang , Guo Ren , Fu Wei , Paul Walmsley , Palmer Dabbelt , Albert Ou , Andrew Lunn , Drew Fustini Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, Drew Fustini , linux-stm32@st-md-mailman.stormreply.com X-Mailer: b4 0.14.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241020_193657_421809_195E86E2 X-CRM114-Status: GOOD ( 23.69 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Jisheng Zhang Add dwmac glue driver to support the DesignWare-based GMAC controllers on the T-HEAD TH1520 SoC. Signed-off-by: Jisheng Zhang [esmil: rename plat->interface -> plat->mac_interface, use devm_stmmac_probe_config_dt()] Signed-off-by: Emil Renner Berthing [drew: convert from stmmac_dvr_probe() to devm_stmmac_pltfr_probe(), convert register access from regmap to regular mmio] Signed-off-by: Drew Fustini --- MAINTAINERS | 1 + drivers/net/ethernet/stmicro/stmmac/Kconfig | 10 + drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c | 268 ++++++++++++++++++++++ 4 files changed, 280 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index a16418d68383..db05123389ac 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -20070,6 +20070,7 @@ F: Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml F: Documentation/devicetree/bindings/pinctrl/thead,th1520-pinctrl.yaml F: arch/riscv/boot/dts/thead/ F: drivers/clk/thead/clk-th1520-ap.c +F: drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c F: drivers/pinctrl/pinctrl-th1520.c F: include/dt-bindings/clock/thead,th1520-clk-ap.h diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 05cc07b8f48c..6658536a4e17 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -228,6 +228,16 @@ 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) + 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 c2f0e91f6bf8..d065634c6223 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -28,6 +28,7 @@ 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_LOONGSON1) += dwmac-loongson1.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..273efcc66890 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c @@ -0,0 +1,268 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * T-HEAD DWMAC platform driver + * + * Copyright (C) 2021 Alibaba Group Holding Limited. + * Copyright (C) 2023 Jisheng Zhang + * + */ + +#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; + void __iomem *apb_base; + struct device *dev; +}; + +static int thead_dwmac_set_phy_if(struct plat_stmmacenet_data *plat) +{ + struct thead_dwmac *dwmac = plat->bsp_priv; + u32 phyif; + + switch (plat->mac_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->mac_interface); + return -EINVAL; + }; + + writel(phyif, dwmac->apb_base + GMAC_INTF_CTRL); + 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->mac_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->mac_interface); + return -EINVAL; + }; + + writel(txclk_dir, dwmac->apb_base + GMAC_TXCLK_OEN); + return 0; +} + +static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int mode) +{ + struct plat_stmmacenet_data *plat; + struct thead_dwmac *dwmac = priv; + unsigned long rate; + u32 div, reg; + + plat = dwmac->plat; + + switch (plat->mac_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; + } + + writel(FIELD_PREP(GMAC_PLLCLK_DIV_EN, 0), dwmac->apb_base + GMAC_PLLCLK_DIV); + + 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); + return; + } + + reg = FIELD_PREP(GMAC_PLLCLK_DIV_EN, 1) | + FIELD_PREP(GMAC_PLLCLK_DIV_MASK, GMAC_PLLCLK_DIV_NUM(div)); + writel(reg, dwmac->apb_base + GMAC_PLLCLK_DIV); + break; + default: + dev_err(dwmac->dev, "unsupported phy interface %d\n", + plat->mac_interface); + return; + } +} + +static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) +{ + struct thead_dwmac *dwmac = plat->bsp_priv; + u32 reg; + + switch (plat->mac_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 */ + writel(GMAC_GTXCLK_SEL_PLL, dwmac->apb_base + GMAC_GTXCLK_SEL); + 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->mac_interface); + return -EINVAL; + } + + writel(reg, dwmac->apb_base + GMAC_CLK_EN); + return 0; +} + +static int thead_dwmac_init(struct platform_device *pdev, void *priv) +{ + struct thead_dwmac *dwmac = priv; + int ret; + + ret = thead_dwmac_set_phy_if(dwmac->plat); + if (ret) + return ret; + + ret = thead_dwmac_set_txclk_dir(dwmac->plat); + if (ret) + return ret; + + writel(GMAC_RXCLK_DELAY_VAL(0), dwmac->apb_base + GMAC_RXCLK_DELAY_CTRL); + writel(GMAC_TXCLK_DELAY_VAL(0), dwmac->apb_base + GMAC_TXCLK_DELAY_CTRL); + + return thead_dwmac_enable_clk(dwmac->plat); +} + +static int thead_dwmac_probe(struct platform_device *pdev) +{ + struct stmmac_resources stmmac_res; + struct plat_stmmacenet_data *plat; + struct thead_dwmac *dwmac; + void __iomem *apb; + 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 = devm_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; + + apb = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(apb)) + return dev_err_probe(&pdev->dev, PTR_ERR(apb), + "Failed to remap gmac apb registers\n"); + + dwmac->dev = &pdev->dev; + dwmac->plat = plat; + dwmac->apb_base = apb; + plat->bsp_priv = dwmac; + plat->fix_mac_speed = thead_dwmac_fix_speed; + plat->init = thead_dwmac_init; + + return devm_stmmac_pltfr_probe(pdev, plat, &stmmac_res); +} + +static const struct of_device_id thead_dwmac_match[] = { + { .compatible = "thead,th1520-gmac" }, + { } +}; +MODULE_DEVICE_TABLE(of, thead_dwmac_match); + +static struct platform_driver thead_dwmac_driver = { + .probe = thead_dwmac_probe, + .driver = { + .name = "thead-dwmac", + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = thead_dwmac_match, + }, +}; +module_platform_driver(thead_dwmac_driver); + +MODULE_AUTHOR("Jisheng Zhang "); +MODULE_AUTHOR("Drew Fustini "); +MODULE_DESCRIPTION("T-HEAD DWMAC platform driver"); +MODULE_LICENSE("GPL");