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Date: Thu, 5 May 2022 14:12:41 +0200 From: Oleksij Rempel <o.rempel@...gutronix.de> To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> Cc: linux-kernel@...r.kernel.org, kernel@...gutronix.de, netdev@...r.kernel.org Subject: Re: [PATCH net-next v3 7/7] net: phy: dp83td510: Add support for the DP83TD510 Ethernet PHY On Thu, May 05, 2022 at 08:33:18AM +0200, Oleksij Rempel wrote: > The DP83TD510E is an ultra-low power Ethernet physical layer transceiver > that supports 10M single pair cable. > > This driver was tested with NXP SJA1105, STMMAC and ASIX AX88772B USB Ethernet > controller. > > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de> > --- > drivers/net/phy/Kconfig | 6 ++ > drivers/net/phy/Makefile | 1 + > drivers/net/phy/dp83td510.c | 210 ++++++++++++++++++++++++++++++++++++ > 3 files changed, 217 insertions(+) > create mode 100644 drivers/net/phy/dp83td510.c > > diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig > index bbbf6c07ea53..9fee639ee5c8 100644 > --- a/drivers/net/phy/Kconfig > +++ b/drivers/net/phy/Kconfig > @@ -342,6 +342,12 @@ config DP83869_PHY > Currently supports the DP83869 PHY. This PHY supports copper and > fiber connections. > > +config DP83TD510_PHY > + tristate "Texas Instruments DP83TD510 Ethernet 10Base-T1L PHY" > + help > + Support for the DP83TD510 Ethernet 10Base-T1L PHY. This PHY supports > + a 10M single pair Ethernet connection for up to 1000 meter cable. > + > config VITESSE_PHY > tristate "Vitesse PHYs" > help > diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile > index b82651b57043..b12b1d86fc99 100644 > --- a/drivers/net/phy/Makefile > +++ b/drivers/net/phy/Makefile > @@ -57,6 +57,7 @@ obj-$(CONFIG_DP83848_PHY) += dp83848.o > obj-$(CONFIG_DP83867_PHY) += dp83867.o > obj-$(CONFIG_DP83869_PHY) += dp83869.o > obj-$(CONFIG_DP83TC811_PHY) += dp83tc811.o > +obj-$(CONFIG_DP83TD510_PHY) += dp83td510.o > obj-$(CONFIG_FIXED_PHY) += fixed_phy.o > obj-$(CONFIG_ICPLUS_PHY) += icplus.o > obj-$(CONFIG_INTEL_XWAY_PHY) += intel-xway.o > diff --git a/drivers/net/phy/dp83td510.c b/drivers/net/phy/dp83td510.c > new file mode 100644 > index 000000000000..5c3251602e4a > --- /dev/null > +++ b/drivers/net/phy/dp83td510.c > @@ -0,0 +1,210 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* Driver for the Texas Instruments DP83TD510 PHY > + * Copyright (c) 2022 Pengutronix, Oleksij Rempel <kernel@...gutronix.de> > + */ > + > +#include <linux/bitfield.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/phy.h> > + > +#define DP83TD510E_PHY_ID 0x20000181 > + > +/* MDIO_MMD_VEND2 registers */ > +#define DP83TD510E_PHY_STS 0x10 > +#define DP83TD510E_STS_MII_INT BIT(7) > +#define DP83TD510E_LINK_STATUS BIT(0) > + > +#define DP83TD510E_GEN_CFG 0x11 > +#define DP83TD510E_GENCFG_INT_POLARITY BIT(3) > +#define DP83TD510E_GENCFG_INT_EN BIT(1) > +#define DP83TD510E_GENCFG_INT_OE BIT(0) > + > +#define DP83TD510E_INTERRUPT_REG_1 0x12 > +#define DP83TD510E_INT1_LINK BIT(13) > +#define DP83TD510E_INT1_LINK_EN BIT(5) > + > +#define DP83TD510E_AN_STAT_1 0x60c > +#define DP83TD510E_MASTER_SLAVE_RESOL_FAIL BIT(15) > + > +static int dp83td510_config_intr(struct phy_device *phydev) > +{ > + int ret; > + > + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { > + /* Clear any pending interrupts */ > + ret = phy_write_mmd(phydev, MDIO_MMD_VEND2, DP83TD510E_PHY_STS, > + 0x0); > + if (ret) > + return ret; > + > + ret = phy_write_mmd(phydev, MDIO_MMD_VEND2, > + DP83TD510E_INTERRUPT_REG_1, > + DP83TD510E_INT1_LINK_EN); > + if (ret) > + return ret; > + > + ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, > + DP83TD510E_GEN_CFG, > + DP83TD510E_GENCFG_INT_POLARITY | > + DP83TD510E_GENCFG_INT_EN | > + DP83TD510E_GENCFG_INT_OE); > + } else { > + ret = phy_write_mmd(phydev, MDIO_MMD_VEND2, > + DP83TD510E_INTERRUPT_REG_1, 0x0); > + if (ret) > + return ret; > + > + ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2, > + DP83TD510E_GEN_CFG, > + DP83TD510E_GENCFG_INT_EN); > + if (ret) > + return ret; > + > + /* Clear any pending interrupts */ > + ret = phy_write_mmd(phydev, MDIO_MMD_VEND2, DP83TD510E_PHY_STS, > + 0x0); > + } > + > + return ret; > +} > + > +static irqreturn_t dp83td510_handle_interrupt(struct phy_device *phydev) > +{ > + int ret; > + > + ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, DP83TD510E_PHY_STS); > + if (ret < 0) { > + phy_error(phydev); > + return IRQ_NONE; > + } else if (!(ret & DP83TD510E_STS_MII_INT)) { > + return IRQ_NONE; > + } > + > + /* Read the current enabled interrupts */ > + ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, DP83TD510E_INTERRUPT_REG_1); > + if (ret < 0) { > + phy_error(phydev); > + return IRQ_NONE; > + } else if (!(ret & DP83TD510E_INT1_LINK_EN) || > + !(ret & DP83TD510E_INT1_LINK)) { > + return IRQ_NONE; > + } > + > + phy_trigger_machine(phydev); > + > + return IRQ_HANDLED; > +} > + > +static int dp83td510_read_status(struct phy_device *phydev) > +{ > + u16 phy_sts; > + int ret, cfg; Heh, here is unused variable. Need to fix it. Regards, Oleksij -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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