/*
*Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.
* Chenghu Wu <b16972@freescale.com>
*
* Driver for broadcom PHYs 522x
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/netdevice.h>
/* DP83865 phy identifier values */
#define BCM5222_PHY_ID 0x00406320
/* PHY Register */
#define BCM5222_TIMEOUT 0x100
/* MII Registers */
#define BCM5222_CTRL 0x00
#define BCM5222_STATUS 0x01
#define BCM5222_ID_HIGH 0x02
#define BCM5222_ID_LOW 0x03
#define BCM5222_AN_ADV 0x04
#define BCM5222_AN_LP 0x05
#define BCM5222_AN_EXP 0x06
#define BCM5222_AN_NEXTPG 0x07
#define BCM5222_AN_LP_NPTX 0x08
#define BCM5222_AUX_CS 0x18
#define BCM5222_AUX_STATUS 0x19
/* CONTROL Bits */
#define BCM5222_CTRL_RESET 0x8000
#define BCM5222_CTRL_LOOPBACK 0x4000
#define BCM5222_CTRL_FORCE 0x2000
#define BCM5222_CTRL_AUTOEN 0x1000
#define BCM5222_CTRL_PWRDN 0x0800
#define BCM5222_CTRL_ISOLATE 0x0400
#define BCM5222_CTRL_RESTART 0x0200
#define BCM5222_CTRL_DUPLEX 0x0100
#define BCM5222_CTRL_COLLEN 0x0080
/* STATUS Bits */
#define BCM5222_STATUS_100T4 0x8000
#define BCM5222_STATUS_100TXFDX 0x4000
#define BCM5222_STATUS_100TX 0x2000
#define BCM5222_STATUS_10FDX 0x1000
#define BCM5222_STATUS_10 0x0800
#define BCM5222_STATUS_MF_PREAMBLE 0x0040
#define BCM5222_STATUS_AN_COMPLETE 0x0020
#define BCM5222_STATUS_REMOTE_FAULT 0x0010
#define BCM5222_STATUS_AN_CAPABLE 0x0008
#define BCM5222_STATUS_LINK 0x0004
#define BCM5222_STATUS_JABBER 0x0002
#define BCM5222_STATUS_EXT_CAP 0x0001
/* ID Values */
#define BCM5222_ID_HIGH_VAL 0x0040
#define BCM5222_ID_LOW_VAL 0x6320
/* Advertise Bits */
#define BCM5222_AN_ADV_NEXTPG 0x8000
#define BCM5222_AN_ADV_REMOTE_FAULT 0x2000
#define BCM5222_AN_ADV_PAUSE 0x0400
#define BCM5222_AN_ADV_100T4 0x0200
#define BCM5222_AN_ADV_100TXFDX 0x0100
#define BCM5222_AN_ADV_100TX 0x0080
#define BCM5222_AN_ADV_10FDX 0x0040
#define BCM5222_AN_ADV_10 0x0020
#define BCM5222_AN_ADV_8023 0x0001
#define BCM5222_AN_ADV_ALL \
(BCM5222_AN_ADV_100TXFDX | \
BCM5222_AN_ADV_100TXFDX | \
BCM5222_AN_ADV_100TX | \
BCM5222_AN_ADV_10FDX | \
BCM5222_AN_ADV_10 | \
BCM5222_AN_ADV_8023)
/* AUX CTRL/STATUS Bits */
#define BCM5222_AUX_CS_JABBER_DIS 0x8000
#define BCM5222_AUX_CS_FORCE_LINK 0x4000
#define BCM5222_AUX_CS_10M_TX_PWR 0x0100
#define BCM5222_AUX_CS_HSQ_LSQ_MASK 0x00c0
#define BCM5222_AUX_CS_EDGE_RATE_MASK 0x0030
#define BCM5222_AUX_CS_AN_IND 0x0008
#define BCM5222_AUX_CS_SPEED_FORCE 0x0004
#define BCM5222_AUX_CS_SPEED 0x0002
#define BCM5222_AUX_CS_DUPLEX 0x0001
/* AUX STATUS Bits */
#define BCM5222_AUX_STATUS_AN_COMP 0x8000
#define BCM5222_AUX_STATUS_AN_COMPACK 0x4000
#define BCM5222_AUX_STATUS_AN_ACKDET 0x2000
#define BCM5222_AUX_STATUS_AN_ABDET 0x1000
#define BCM5222_AUX_STATUS_AN_PAUSE 0x0800
#define BCM5222_AUX_STATUS_AN_HCDMASK 0x0700
#define BCM5222_AUX_STATUS_AN_PDFAULT 0x0080
#define BCM5222_AUX_STATUS_LP_RMTFAULT 0x0040
#define BCM5222_AUX_STATUS_LP_PGRX 0x0020
#define BCM5222_AUX_STATUS_LP_NEGABLE 0x0010
#define BCM5222_AUX_STATUS_SPEED 0x0008
#define BCM5222_AUX_STATUS_LINK 0x0004
#define BCM5222_AUX_STATUS_AN_EN 0x0002
#define BCM5222_AUX_STATUS_JABBER 0x0001
static int bcm5222_config_intr(struct phy_device *phydev)
{
int err = 0;
printk(KERN_INFO "%s PHY_INTERRUPT %x\n",
__func__, phydev->interrupts);
return err;
}
static int bcm5222_ack_interrupt(struct phy_device *phydev)
{
return 0;
}
static int bcm5222_config_init(struct phy_device *phydev)
{
return bcm5222_ack_interrupt(phydev);
}
static int bcm5222_config_init_old(struct phy_device *phydev)
{
int timeout;
int flag = 1;
int ret = phy_read(phydev, BCM5222_AUX_STATUS);
if (ret < 0) {
printk(KERN_INFO "%s MII_BCM5222_ISR %x\n",
__func__, ret);
}
/*
* reset
*/
phy_write(phydev, BCM5222_CTRL, BCM5222_CTRL_RESET);
/* check that it cleared */
ret = phy_read(phydev, BCM5222_CTRL);
printk(KERN_INFO "%s BCM5222_CTRL %x\n",
__func__, ret);
/*if reset bit is set, return */
if (ret & BCM5222_CTRL_RESET) {
printk(KERN_ERR "%s %x = BCM5222_CTRL_RESET(%x)\n",
__func__, ret, BCM5222_CTRL_RESET);
return -ETIME;
}
/*
* setup auto-negotiation
*/
/* disable */
phy_write(phydev, BCM5222_CTRL, 0);
ret = phy_read(phydev, BCM5222_CTRL);
printk(KERN_INFO "%s BCM5222_CTRL %x\n",
__func__, ret);
/* set the auto-negotiation advertisement register */
phy_write(phydev, BCM5222_AN_ADV, BCM5222_AN_ADV_ALL);
ret = phy_read(phydev, BCM5222_AN_ADV);
printk(KERN_INFO "%s BCM5222_AN_ADV %x, BCM5222_AN_ADV_ALL %x\n",
__func__, ret, BCM5222_AN_ADV_ALL);
/* enable */
phy_write(phydev, BCM5222_CTRL, BCM5222_CTRL_AUTOEN);
ret = phy_read(phydev, BCM5222_CTRL);
printk(KERN_INFO "%s BCM5222_CTRL %x\n",
__func__, ret);
printk(KERN_INFO "** wait for complete\n");
/* read aux status reg */
ret = phy_read(phydev, BCM5222_AUX_STATUS);
/* Wait for the auto-negotiation completion */
timeout = BCM5222_TIMEOUT;
while (!(ret & BCM5222_AUX_STATUS_AN_COMP)) {
if (!timeout--) {
flag = 0;
printk(KERN_INFO "BCM5222: TIMEOUT\n");
break;
}
mdelay(10);
/* Read PHY status register */
ret = phy_read(phydev, BCM5222_AUX_STATUS);
}
ret = phy_read(phydev, BCM5222_AUX_STATUS);
ret = phy_read(phydev, BCM5222_AN_ADV);
return 0;
}
static int bcm5222_read_status(struct phy_device *phydev)
{
int ret;
ret = phy_read(phydev, BCM5222_AUX_STATUS);
printk(KERN_INFO "%s ret %x\n", __func__, ret);
if (ret & BCM5222_AUX_STATUS_LINK)
phydev->link = 1;
else
phydev->link = 0;
if (ret & BCM5222_AUX_STATUS_SPEED)
phydev->speed = SPEED_100;
else
phydev->speed = SPEED_10;
ret = phy_read(phydev, BCM5222_AUX_CS);
printk(KERN_INFO "%s ret %x\n", __func__, ret);
if (ret & BCM5222_AUX_CS_DUPLEX)
phydev->duplex = DUPLEX_FULL;
else
phydev->duplex = DUPLEX_HALF;
return 0;
}
static int bcm5222_config_aneg(struct phy_device *phydev)
{
phy_read(phydev, BCM5222_AUX_STATUS);
phy_read(phydev, BCM5222_AN_ADV);
return 0;
}
static struct phy_driver bcm5222_driver = {
.phy_id = BCM5222_PHY_ID,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5222",
.features = PHY_BASIC_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_init = bcm5222_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm5222_ack_interrupt,
.config_intr = bcm5222_config_intr,
.driver = {.owner = THIS_MODULE,}
};
static int __init bcm5222_init(void)
{
int ret;
ret = phy_driver_register(&bcm5222_driver);
if (ret)
goto err1;
return 0;
err1:
printk(KERN_INFO "register bcm5222 PHY driver fail\n");
return ret;
}
static void __exit bcm5222_exit(void)
{
phy_driver_unregister(&bcm5222_driver);
}
MODULE_DESCRIPTION("Broadcom PHY driver");
MODULE_LICENSE("GPL v2");
module_init(bcm5222_init);
module_exit(bcm5222_exit);