// SPDX-License-Identifier: GPL-2.0+ /* * drivers/net/phy/davicom.c * * Driver for Davicom PHYs * * Author: Andy Fleming * * Copyright (c) 2004 Freescale Semiconductor, Inc. */ #include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/unistd.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <linux/spinlock.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/mii.h> #include <linux/ethtool.h> #include <linux/phy.h> #include <asm/io.h> #include <asm/irq.h> #include <linux/uaccess.h> #define MII_DM9161_SCR 0x10 #define MII_DM9161_SCR_INIT 0x0610 #define MII_DM9161_SCR_RMII 0x0100 /* DM9161 Interrupt Register */ #define MII_DM9161_INTR 0x15 #define MII_DM9161_INTR_PEND 0x8000 #define MII_DM9161_INTR_DPLX_MASK 0x0800 #define MII_DM9161_INTR_SPD_MASK 0x0400 #define MII_DM9161_INTR_LINK_MASK 0x0200 #define MII_DM9161_INTR_MASK 0x0100 #define MII_DM9161_INTR_DPLX_CHANGE 0x0010 #define MII_DM9161_INTR_SPD_CHANGE 0x0008 #define MII_DM9161_INTR_LINK_CHANGE 0x0004 #define MII_DM9161_INTR_INIT 0x0000 #define MII_DM9161_INTR_STOP \ (MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \ | MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK) /* DM9161 10BT Configuration/Status */ #define MII_DM9161_10BTCSR 0x12 #define MII_DM9161_10BTCSR_INIT 0x7800 MODULE_DESCRIPTION("Davicom PHY driver"); MODULE_AUTHOR("Andy Fleming"); MODULE_LICENSE("GPL"); #define DM9161_DELAY 1 static int dm9161_config_intr(struct phy_device *phydev) { int temp; temp = phy_read(phydev, MII_DM9161_INTR); if (temp < 0) return temp; if (PHY_INTERRUPT_ENABLED == phydev->interrupts) temp &= ~(MII_DM9161_INTR_STOP); else temp |= MII_DM9161_INTR_STOP; temp = phy_write(phydev, MII_DM9161_INTR, temp); return temp; } static int dm9161_config_aneg(struct phy_device *phydev) { int err; /* Isolate the PHY */ err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE); if (err < 0) return err; /* Configure the new settings */ err = genphy_config_aneg(phydev); if (err < 0) return err; return 0; } static int dm9161_config_init(struct phy_device *phydev) { int err, temp; /* Isolate the PHY */ err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE); if (err < 0) return err; switch (phydev->interface) { case PHY_INTERFACE_MODE_MII: temp = MII_DM9161_SCR_INIT; break; case PHY_INTERFACE_MODE_RMII: temp = MII_DM9161_SCR_INIT | MII_DM9161_SCR_RMII; break; default: return -EINVAL; } /* Do not bypass the scrambler/descrambler */ err = phy_write(phydev, MII_DM9161_SCR, temp); if (err < 0) return err; /* Clear 10BTCSR to default */ err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT); if (err < 0) return err; /* Reconnect the PHY, and enable Autonegotiation */ return phy_write(phydev, MII_BMCR, BMCR_ANENABLE); } static int dm9161_ack_interrupt(struct phy_device *phydev) { int err = phy_read(phydev, MII_DM9161_INTR); return (err < 0) ? err : 0; } static struct phy_driver dm91xx_driver[] = { { .phy_id = 0x0181b880, .name = "Davicom DM9161E", .phy_id_mask = 0x0ffffff0, /* PHY_BASIC_FEATURES */ .config_init = dm9161_config_init, .config_aneg = dm9161_config_aneg, .ack_interrupt = dm9161_ack_interrupt, .config_intr = dm9161_config_intr, }, { .phy_id = 0x0181b8b0, .name = "Davicom DM9161B/C", .phy_id_mask = 0x0ffffff0, /* PHY_BASIC_FEATURES */ .config_init = dm9161_config_init, .config_aneg = dm9161_config_aneg, .ack_interrupt = dm9161_ack_interrupt, .config_intr = dm9161_config_intr, }, { .phy_id = 0x0181b8a0, .name = "Davicom DM9161A", .phy_id_mask = 0x0ffffff0, /* PHY_BASIC_FEATURES */ .config_init = dm9161_config_init, .config_aneg = dm9161_config_aneg, .ack_interrupt = dm9161_ack_interrupt, .config_intr = dm9161_config_intr, }, { .phy_id = 0x00181b80, .name = "Davicom DM9131", .phy_id_mask = 0x0ffffff0, /* PHY_BASIC_FEATURES */ .ack_interrupt = dm9161_ack_interrupt, .config_intr = dm9161_config_intr, } }; module_phy_driver(dm91xx_driver); static struct mdio_device_id __maybe_unused davicom_tbl[] = { { 0x0181b880, 0x0ffffff0 }, { 0x0181b8b0, 0x0ffffff0 }, { 0x0181b8a0, 0x0ffffff0 }, { 0x00181b80, 0x0ffffff0 }, { } }; MODULE_DEVICE_TABLE(mdio, davicom_tbl);