diff --git a/MAINTAINERS b/MAINTAINERS index c58947fb2f..4e740fb5d2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -617,6 +617,7 @@ F: drivers/i2c/muxes/pca954x.c F: drivers/i2c/zynq_i2c.c F: drivers/mmc/zynq_sdhci.c F: drivers/mtd/nand/raw/zynq_nand.c +F: drivers/net/phy/ethernet_id.c F: drivers/net/phy/xilinx_phy.c F: drivers/net/zynq_gem.c F: drivers/serial/serial_zynq.c diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 4f8d33ce8f..74339a25ca 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -307,6 +307,14 @@ config PHY_XILINX_GMII2RGMII as bridge between MAC connected over GMII and external phy that is connected over RGMII interface. +config PHY_ETHERNET_ID + bool "Read ethernet PHY id" + depends on DM_GPIO + default y if ZYNQ_GEM + help + Enable this config to read ethernet phy id from the phy node of DT + and create a phy device using id. + config PHY_FIXED bool "Fixed-Link PHY" depends on DM_ETH diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 77f7f60621..b28440bc4e 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_PHY_TI_DP83867) += dp83867.o obj-$(CONFIG_PHY_TI_DP83869) += dp83869.o obj-$(CONFIG_PHY_XILINX) += xilinx_phy.o obj-$(CONFIG_PHY_XILINX_GMII2RGMII) += xilinx_gmii2rgmii.o +obj-$(CONFIG_PHY_ETHERNET_ID) += ethernet_id.o obj-$(CONFIG_PHY_VITESSE) += vitesse.o obj-$(CONFIG_PHY_MSCC) += mscc.o obj-$(CONFIG_PHY_FIXED) += fixed.o diff --git a/drivers/net/phy/ethernet_id.c b/drivers/net/phy/ethernet_id.c new file mode 100644 index 0000000000..5617ac3ad6 --- /dev/null +++ b/drivers/net/phy/ethernet_id.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Xilinx ethernet phy reset driver + * + * Copyright (C) 2022 Xilinx, Inc. + */ + +#include +#include +#include +#include +#include + +struct phy_device *phy_connect_phy_id(struct mii_dev *bus, struct udevice *dev, + phy_interface_t interface) +{ + struct phy_device *phydev; + struct ofnode_phandle_args phandle_args; + struct gpio_desc gpio; + ofnode node; + u32 id, assert, deassert; + u16 vendor, device; + int ret; + + if (dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0, + &phandle_args)) + return NULL; + + if (!ofnode_valid(phandle_args.node)) + return NULL; + + node = phandle_args.node; + + ret = ofnode_read_eth_phy_id(node, &vendor, &device); + if (ret) { + dev_err(dev, "Failed to read eth PHY id, err: %d\n", ret); + return NULL; + } + + ret = gpio_request_by_name_nodev(node, "reset-gpios", 0, &gpio, + GPIOD_ACTIVE_LOW); + if (!ret) { + assert = ofnode_read_u32_default(node, "reset-assert-us", 0); + deassert = ofnode_read_u32_default(node, + "reset-deassert-us", 0); + ret = dm_gpio_set_value(&gpio, 1); + if (ret) { + dev_err(dev, "Failed assert gpio, err: %d\n", ret); + return NULL; + } + + udelay(assert); + + ret = dm_gpio_set_value(&gpio, 0); + if (ret) { + dev_err(dev, "Failed deassert gpio, err: %d\n", ret); + return NULL; + } + + udelay(deassert); + } + + id = vendor << 16 | device; + phydev = phy_device_create(bus, 0, id, false, interface); + if (phydev) + phydev->node = node; + + return phydev; +} diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index f63705e1b9..fffa10f68b 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1047,6 +1047,11 @@ struct phy_device *phy_connect(struct mii_dev *bus, int addr, phydev = phy_device_create(bus, 0, PHY_NCSI_ID, false, interface); #endif +#ifdef CONFIG_PHY_ETHERNET_ID + if (!phydev) + phydev = phy_connect_phy_id(bus, dev, interface); +#endif + #ifdef CONFIG_PHY_XILINX_GMII2RGMII if (!phydev) phydev = phy_connect_gmii2rgmii(bus, dev, interface); diff --git a/include/phy.h b/include/phy.h index 832d7a1695..9ea4bd42db 100644 --- a/include/phy.h +++ b/include/phy.h @@ -468,6 +468,19 @@ struct phy_device *phy_device_create(struct mii_dev *bus, int addr, u32 phy_id, bool is_c45, phy_interface_t interface); +/** + * phy_connect_phy_id() - Connect to phy device by reading PHY id + * from phy node. + * + * @bus: MII/MDIO bus that hosts the PHY + * @dev: Ethernet device to associate to the PHY + * @interface: Interface between the MAC and PHY + * @return: pointer to phy_device if a PHY is found, + * or NULL otherwise + */ +struct phy_device *phy_connect_phy_id(struct mii_dev *bus, struct udevice *dev, + phy_interface_t interface); + static inline ofnode phy_get_ofnode(struct phy_device *phydev) { if (ofnode_valid(phydev->node))