| Message ID | 20240930-th1520-dwmac-v3-2-ae3e03c225ab@tenstorrent.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Add the dwmac driver support for T-HEAD TH1520 SoC | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Guessing tree name failed - patch did not apply |
Drew Fustini wrote: > From: Jisheng Zhang <jszhang@kernel.org> > > Add dwmac glue driver to support the DesignWare-based GMAC controllers > on the T-HEAD TH1520 SoC. > > Signed-off-by: Jisheng Zhang <jszhang@kernel.org> > [esmil: rename plat->interface -> plat->mac_interface, > use devm_stmmac_probe_config_dt()] > Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com> > [drew: convert from stmmac_dvr_probe() to devm_stmmac_pltfr_probe()] > Signed-off-by: Drew Fustini <dfustini@tenstorrent.com> > --- > MAINTAINERS | 1 + > drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 + > drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + > drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c | 291 ++++++++++++++++++++++ > 4 files changed, 304 insertions(+) > > diff --git a/MAINTAINERS b/MAINTAINERS > index 9e50107efb37..1d24863c01df 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -19946,6 +19946,7 @@ 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..82030adaf16e 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig > +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig > @@ -228,6 +228,17 @@ 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 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..f2f94539c0d2 > --- /dev/null > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c > @@ -0,0 +1,291 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * T-HEAD DWMAC platform driver > + * > + * Copyright (C) 2021 Alibaba Group Holding Limited. > + * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org> > + * > + */ > + > +#include <linux/bitfield.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_device.h> > +#include <linux/of_net.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#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 > + > +static const struct regmap_config regmap_config = { > + .reg_bits = 32, > + .val_bits = 32, > + .reg_stride = 4, > +}; > + > +struct thead_dwmac { > + struct plat_stmmacenet_data *plat; > + struct regmap *apb_regmap; > + 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; > + }; > + > + return regmap_write(dwmac->apb_regmap, GMAC_INTF_CTRL, phyif); > +} > + > +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; > + }; > + > + return regmap_write(dwmac->apb_regmap, GMAC_TXCLK_OEN, txclk_dir); > +} > + > +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; > + > + 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; > + } > + > + 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); > + return; > + } > + 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->mac_interface); > + return; > + } > +} > + > +static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) > +{ > + struct thead_dwmac *dwmac = plat->bsp_priv; > + int err; > + 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 */ > + err = regmap_write(dwmac->apb_regmap, GMAC_GTXCLK_SEL, GMAC_GTXCLK_SEL_PLL); > + if (err) > + return dev_err_probe(dwmac->dev, err, > + "failed to set phy interface\n"); > + > + 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; > + } > + > + return regmap_write(dwmac->apb_regmap, GMAC_CLK_EN, reg); > +} > + > +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; > + > + ret = regmap_write(dwmac->apb_regmap, GMAC_RXCLK_DELAY_CTRL, > + GMAC_RXCLK_DELAY_VAL(0)); > + if (ret) > + return dev_err_probe(dwmac->dev, ret, > + "failed to set GMAC RX clock delay\n"); > + > + ret = regmap_write(dwmac->apb_regmap, GMAC_TXCLK_DELAY_CTRL, > + GMAC_TXCLK_DELAY_VAL(0)); > + if (ret) > + return dev_err_probe(dwmac->dev, ret, > + "failed to set GMAC TX clock delay\n"); > + > + 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->apb_regmap = devm_regmap_init_mmio(&pdev->dev, apb, ®map_config); > + if (IS_ERR(dwmac->apb_regmap)) > + return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->apb_regmap), > + "Failed to access gmac apb registers\n"); Why do you need to convert the APB range to a regmap? As far as I can tell it's just regular 32bit memory mapped registers, so should work fine with just readl()/writel() /Emil > + > + dwmac->dev = &pdev->dev; > + dwmac->plat = plat; > + 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 <jszhang@kernel.org>"); > +MODULE_AUTHOR("Drew Fustini <drew@pdp7.com>"); > +MODULE_DESCRIPTION("T-HEAD DWMAC platform driver"); > +MODULE_LICENSE("GPL"); > > -- > 2.34.1 > > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv
On Tue, Oct 01, 2024 at 02:48:13AM -0700, Emil Renner Berthing wrote: > Drew Fustini wrote: > > From: Jisheng Zhang <jszhang@kernel.org> > > > > Add dwmac glue driver to support the DesignWare-based GMAC controllers > > on the T-HEAD TH1520 SoC. > > > > Signed-off-by: Jisheng Zhang <jszhang@kernel.org> > > [esmil: rename plat->interface -> plat->mac_interface, > > use devm_stmmac_probe_config_dt()] > > Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com> > > [drew: convert from stmmac_dvr_probe() to devm_stmmac_pltfr_probe()] > > Signed-off-by: Drew Fustini <dfustini@tenstorrent.com> > > --- > > MAINTAINERS | 1 + > > drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 + > > drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + > > drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c | 291 ++++++++++++++++++++++ > > 4 files changed, 304 insertions(+) > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index 9e50107efb37..1d24863c01df 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -19946,6 +19946,7 @@ 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..82030adaf16e 100644 > > --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig > > +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig > > @@ -228,6 +228,17 @@ 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 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..f2f94539c0d2 > > --- /dev/null > > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c > > @@ -0,0 +1,291 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * T-HEAD DWMAC platform driver > > + * > > + * Copyright (C) 2021 Alibaba Group Holding Limited. > > + * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org> > > + * > > + */ > > + > > +#include <linux/bitfield.h> > > +#include <linux/module.h> > > +#include <linux/of.h> > > +#include <linux/of_device.h> > > +#include <linux/of_net.h> > > +#include <linux/platform_device.h> > > +#include <linux/regmap.h> > > + > > +#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 > > + > > +static const struct regmap_config regmap_config = { > > + .reg_bits = 32, > > + .val_bits = 32, > > + .reg_stride = 4, > > +}; > > + > > +struct thead_dwmac { > > + struct plat_stmmacenet_data *plat; > > + struct regmap *apb_regmap; > > + 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; > > + }; > > + > > + return regmap_write(dwmac->apb_regmap, GMAC_INTF_CTRL, phyif); > > +} > > + > > +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; > > + }; > > + > > + return regmap_write(dwmac->apb_regmap, GMAC_TXCLK_OEN, txclk_dir); > > +} > > + > > +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; > > + > > + 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; > > + } > > + > > + 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); > > + return; > > + } > > + 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->mac_interface); > > + return; > > + } > > +} > > + > > +static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) > > +{ > > + struct thead_dwmac *dwmac = plat->bsp_priv; > > + int err; > > + 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 */ > > + err = regmap_write(dwmac->apb_regmap, GMAC_GTXCLK_SEL, GMAC_GTXCLK_SEL_PLL); > > + if (err) > > + return dev_err_probe(dwmac->dev, err, > > + "failed to set phy interface\n"); > > + > > + 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; > > + } > > + > > + return regmap_write(dwmac->apb_regmap, GMAC_CLK_EN, reg); > > +} > > + > > +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; > > + > > + ret = regmap_write(dwmac->apb_regmap, GMAC_RXCLK_DELAY_CTRL, > > + GMAC_RXCLK_DELAY_VAL(0)); > > + if (ret) > > + return dev_err_probe(dwmac->dev, ret, > > + "failed to set GMAC RX clock delay\n"); > > + > > + ret = regmap_write(dwmac->apb_regmap, GMAC_TXCLK_DELAY_CTRL, > > + GMAC_TXCLK_DELAY_VAL(0)); > > + if (ret) > > + return dev_err_probe(dwmac->dev, ret, > > + "failed to set GMAC TX clock delay\n"); > > + > > + 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->apb_regmap = devm_regmap_init_mmio(&pdev->dev, apb, ®map_config); > > + if (IS_ERR(dwmac->apb_regmap)) > > + return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->apb_regmap), > > + "Failed to access gmac apb registers\n"); > > Why do you need to convert the APB range to a regmap? As far as I can tell it's > just regular 32bit memory mapped registers, so should work fine with just > readl()/writel() Good point, I don't think there is any benefit to using regmap. I will change the next revision to use writel() instead. I just tested this and the network interface still works okay. Thanks, Drew diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c index f2f94539c0d2..df2fe0fdd128 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c @@ -13,7 +13,6 @@ #include <linux/of_device.h> #include <linux/of_net.h> #include <linux/platform_device.h> -#include <linux/regmap.h> #include "stmmac_platform.h" @@ -52,15 +51,9 @@ #define GMAC_GMII_RGMII_RATE 125000000 #define GMAC_MII_RATE 25000000 -static const struct regmap_config regmap_config = { - .reg_bits = 32, - .val_bits = 32, - .reg_stride = 4, -}; - struct thead_dwmac { struct plat_stmmacenet_data *plat; - struct regmap *apb_regmap; + void __iomem *apb_base; struct device *dev; }; @@ -85,7 +78,8 @@ static int thead_dwmac_set_phy_if(struct plat_stmmacenet_data *plat) return -EINVAL; }; - return regmap_write(dwmac->apb_regmap, GMAC_INTF_CTRL, phyif); + writel(phyif, dwmac->apb_base + GMAC_INTF_CTRL); + return 0; } static int thead_dwmac_set_txclk_dir(struct plat_stmmacenet_data *plat) @@ -109,7 +103,8 @@ static int thead_dwmac_set_txclk_dir(struct plat_stmmacenet_data *plat) return -EINVAL; }; - return regmap_write(dwmac->apb_regmap, GMAC_TXCLK_OEN, txclk_dir); + 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) @@ -117,7 +112,7 @@ static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int m struct plat_stmmacenet_data *plat; struct thead_dwmac *dwmac = priv; unsigned long rate; - u32 div; + u32 div, reg; plat = dwmac->plat; @@ -137,7 +132,7 @@ static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int m return; } - regmap_update_bits(dwmac->apb_regmap, GMAC_PLLCLK_DIV, GMAC_PLLCLK_DIV_EN, 0); + writel(FIELD_PREP(GMAC_PLLCLK_DIV_EN, 0), dwmac->apb_base + GMAC_PLLCLK_DIV); switch (speed) { case SPEED_1000: @@ -153,11 +148,10 @@ static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int m dev_err(dwmac->dev, "invalid speed %u\n", speed); return; } - 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); + 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", @@ -169,7 +163,6 @@ static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int m static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) { struct thead_dwmac *dwmac = plat->bsp_priv; - int err; u32 reg; switch (plat->mac_interface) { @@ -182,11 +175,7 @@ static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) case PHY_INTERFACE_MODE_RGMII_RXID: case PHY_INTERFACE_MODE_RGMII_TXID: /* use pll */ - err = regmap_write(dwmac->apb_regmap, GMAC_GTXCLK_SEL, GMAC_GTXCLK_SEL_PLL); - if (err) - return dev_err_probe(dwmac->dev, err, - "failed to set phy interface\n"); - + 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; @@ -197,7 +186,8 @@ static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) return -EINVAL; } - return regmap_write(dwmac->apb_regmap, GMAC_CLK_EN, reg); + writel(reg, dwmac->apb_base + GMAC_CLK_EN); + return 0; } static int thead_dwmac_init(struct platform_device *pdev, void *priv) @@ -213,17 +203,8 @@ static int thead_dwmac_init(struct platform_device *pdev, void *priv) if (ret) return ret; - ret = regmap_write(dwmac->apb_regmap, GMAC_RXCLK_DELAY_CTRL, - GMAC_RXCLK_DELAY_VAL(0)); - if (ret) - return dev_err_probe(dwmac->dev, ret, - "failed to set GMAC RX clock delay\n"); - - ret = regmap_write(dwmac->apb_regmap, GMAC_TXCLK_DELAY_CTRL, - GMAC_TXCLK_DELAY_VAL(0)); - if (ret) - return dev_err_probe(dwmac->dev, ret, - "failed to set GMAC TX clock delay\n"); + 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); } @@ -255,13 +236,9 @@ static int thead_dwmac_probe(struct platform_device *pdev) return dev_err_probe(&pdev->dev, PTR_ERR(apb), "Failed to remap gmac apb registers\n"); - dwmac->apb_regmap = devm_regmap_init_mmio(&pdev->dev, apb, ®map_config); - if (IS_ERR(dwmac->apb_regmap)) - return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->apb_regmap), - "Failed to access 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;
diff --git a/MAINTAINERS b/MAINTAINERS index 9e50107efb37..1d24863c01df 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19946,6 +19946,7 @@ 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..82030adaf16e 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -228,6 +228,17 @@ 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 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..f2f94539c0d2 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c @@ -0,0 +1,291 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * T-HEAD DWMAC platform driver + * + * Copyright (C) 2021 Alibaba Group Holding Limited. + * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org> + * + */ + +#include <linux/bitfield.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_net.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#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 + +static const struct regmap_config regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +struct thead_dwmac { + struct plat_stmmacenet_data *plat; + struct regmap *apb_regmap; + 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; + }; + + return regmap_write(dwmac->apb_regmap, GMAC_INTF_CTRL, phyif); +} + +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; + }; + + return regmap_write(dwmac->apb_regmap, GMAC_TXCLK_OEN, txclk_dir); +} + +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; + + 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; + } + + 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); + return; + } + 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->mac_interface); + return; + } +} + +static int thead_dwmac_enable_clk(struct plat_stmmacenet_data *plat) +{ + struct thead_dwmac *dwmac = plat->bsp_priv; + int err; + 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 */ + err = regmap_write(dwmac->apb_regmap, GMAC_GTXCLK_SEL, GMAC_GTXCLK_SEL_PLL); + if (err) + return dev_err_probe(dwmac->dev, err, + "failed to set phy interface\n"); + + 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; + } + + return regmap_write(dwmac->apb_regmap, GMAC_CLK_EN, reg); +} + +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; + + ret = regmap_write(dwmac->apb_regmap, GMAC_RXCLK_DELAY_CTRL, + GMAC_RXCLK_DELAY_VAL(0)); + if (ret) + return dev_err_probe(dwmac->dev, ret, + "failed to set GMAC RX clock delay\n"); + + ret = regmap_write(dwmac->apb_regmap, GMAC_TXCLK_DELAY_CTRL, + GMAC_TXCLK_DELAY_VAL(0)); + if (ret) + return dev_err_probe(dwmac->dev, ret, + "failed to set GMAC TX clock delay\n"); + + 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->apb_regmap = devm_regmap_init_mmio(&pdev->dev, apb, ®map_config); + if (IS_ERR(dwmac->apb_regmap)) + return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->apb_regmap), + "Failed to access gmac apb registers\n"); + + dwmac->dev = &pdev->dev; + dwmac->plat = plat; + 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 <jszhang@kernel.org>"); +MODULE_AUTHOR("Drew Fustini <drew@pdp7.com>"); +MODULE_DESCRIPTION("T-HEAD DWMAC platform driver"); +MODULE_LICENSE("GPL");