0cefeebaf3
The ICPlus IP175C sports a 100Mbit/s 4-port switch in addition to a dedicated 100Mbit/s WAN port. Signed-off-by: Michael Barkowski <michael.barkowski@freescale.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
134 lines
3 KiB
C
134 lines
3 KiB
C
/*
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* Driver for ICPlus PHYs
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*
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* Copyright (c) 2007 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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MODULE_DESCRIPTION("ICPlus IP175C PHY driver");
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MODULE_AUTHOR("Michael Barkowski");
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MODULE_LICENSE("GPL");
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static int ip175c_config_init(struct phy_device *phydev)
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{
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int err, i;
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static int full_reset_performed = 0;
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if (full_reset_performed == 0) {
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/* master reset */
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err = phydev->bus->write(phydev->bus, 30, 0, 0x175c);
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if (err < 0)
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return err;
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/* ensure no bus delays overlap reset period */
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err = phydev->bus->read(phydev->bus, 30, 0);
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/* data sheet specifies reset period is 2 msec */
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mdelay(2);
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/* enable IP175C mode */
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err = phydev->bus->write(phydev->bus, 29, 31, 0x175c);
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if (err < 0)
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return err;
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/* Set MII0 speed and duplex (in PHY mode) */
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err = phydev->bus->write(phydev->bus, 29, 22, 0x420);
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if (err < 0)
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return err;
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/* reset switch ports */
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for (i = 0; i < 5; i++) {
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err = phydev->bus->write(phydev->bus, i,
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MII_BMCR, BMCR_RESET);
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if (err < 0)
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return err;
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}
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for (i = 0; i < 5; i++)
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err = phydev->bus->read(phydev->bus, i, MII_BMCR);
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mdelay(2);
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full_reset_performed = 1;
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}
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if (phydev->addr != 4) {
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phydev->state = PHY_RUNNING;
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phydev->speed = SPEED_100;
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phydev->duplex = DUPLEX_FULL;
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phydev->link = 1;
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netif_carrier_on(phydev->attached_dev);
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}
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return 0;
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}
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static int ip175c_read_status(struct phy_device *phydev)
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{
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if (phydev->addr == 4) /* WAN port */
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genphy_read_status(phydev);
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else
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/* Don't need to read status for switch ports */
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phydev->irq = PHY_IGNORE_INTERRUPT;
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return 0;
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}
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static int ip175c_config_aneg(struct phy_device *phydev)
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{
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if (phydev->addr == 4) /* WAN port */
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genphy_config_aneg(phydev);
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return 0;
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}
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static struct phy_driver ip175c_driver = {
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.phy_id = 0x02430d80,
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.name = "ICPlus IP175C",
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.phy_id_mask = 0x0ffffff0,
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.features = PHY_BASIC_FEATURES,
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.config_init = &ip175c_config_init,
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.config_aneg = &ip175c_config_aneg,
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.read_status = &ip175c_read_status,
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.driver = { .owner = THIS_MODULE,},
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};
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static int __init ip175c_init(void)
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{
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return phy_driver_register(&ip175c_driver);
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}
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static void __exit ip175c_exit(void)
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{
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phy_driver_unregister(&ip175c_driver);
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}
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module_init(ip175c_init);
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module_exit(ip175c_exit);
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