diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/phy/davicom.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/drivers/net/phy/davicom.c b/drivers/net/phy/davicom.c new file mode 100644 index 000000000..4ac4bce1b --- /dev/null +++ b/drivers/net/phy/davicom.c @@ -0,0 +1,220 @@ +// 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) +#define MII_DM9161_INTR_CHANGE \ + (MII_DM9161_INTR_DPLX_CHANGE | \ + MII_DM9161_INTR_SPD_CHANGE | \ + MII_DM9161_INTR_LINK_CHANGE) + +/* 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"); + + +static int dm9161_ack_interrupt(struct phy_device *phydev) +{ + int err = phy_read(phydev, MII_DM9161_INTR); + + return (err < 0) ? err : 0; +} + +#define DM9161_DELAY 1 +static int dm9161_config_intr(struct phy_device *phydev) +{ + int temp, err; + + temp = phy_read(phydev, MII_DM9161_INTR); + + if (temp < 0) + return temp; + + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { + err = dm9161_ack_interrupt(phydev); + if (err) + return err; + + temp &= ~(MII_DM9161_INTR_STOP); + err = phy_write(phydev, MII_DM9161_INTR, temp); + } else { + temp |= MII_DM9161_INTR_STOP; + err = phy_write(phydev, MII_DM9161_INTR, temp); + if (err) + return err; + + err = dm9161_ack_interrupt(phydev); + } + + return err; +} + +static irqreturn_t dm9161_handle_interrupt(struct phy_device *phydev) +{ + int irq_status; + + irq_status = phy_read(phydev, MII_DM9161_INTR); + if (irq_status < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + if (!(irq_status & MII_DM9161_INTR_CHANGE)) + return IRQ_NONE; + + phy_trigger_machine(phydev); + + return IRQ_HANDLED; +} + +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 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, + .config_intr = dm9161_config_intr, + .handle_interrupt = dm9161_handle_interrupt, +}, { + .phy_id = 0x0181b8b0, + .name = "Davicom DM9161B/C", + .phy_id_mask = 0x0ffffff0, + /* PHY_BASIC_FEATURES */ + .config_init = dm9161_config_init, + .config_aneg = dm9161_config_aneg, + .config_intr = dm9161_config_intr, + .handle_interrupt = dm9161_handle_interrupt, +}, { + .phy_id = 0x0181b8a0, + .name = "Davicom DM9161A", + .phy_id_mask = 0x0ffffff0, + /* PHY_BASIC_FEATURES */ + .config_init = dm9161_config_init, + .config_aneg = dm9161_config_aneg, + .config_intr = dm9161_config_intr, + .handle_interrupt = dm9161_handle_interrupt, +}, { + .phy_id = 0x00181b80, + .name = "Davicom DM9131", + .phy_id_mask = 0x0ffffff0, + /* PHY_BASIC_FEATURES */ + .config_intr = dm9161_config_intr, + .handle_interrupt = dm9161_handle_interrupt, +} }; + +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); |