mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 21:38:32 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
399 lines
11 KiB
C
399 lines
11 KiB
C
/*
|
|
|
|
mii.c: MII interface library
|
|
|
|
Maintained by Jeff Garzik <jgarzik@pobox.com>
|
|
Copyright 2001,2002 Jeff Garzik
|
|
|
|
Various code came from myson803.c and other files by
|
|
Donald Becker. Copyright:
|
|
|
|
Written 1998-2002 by Donald Becker.
|
|
|
|
This software may be used and distributed according
|
|
to the terms of the GNU General Public License (GPL),
|
|
incorporated herein by reference. Drivers based on
|
|
or derived from this code fall under the GPL and must
|
|
retain the authorship, copyright and license notice.
|
|
This file is not a complete program and may only be
|
|
used when the entire operating system is licensed
|
|
under the GPL.
|
|
|
|
The author may be reached as becker@scyld.com, or C/O
|
|
Scyld Computing Corporation
|
|
410 Severn Ave., Suite 210
|
|
Annapolis MD 21403
|
|
|
|
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/mii.h>
|
|
|
|
int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
|
|
{
|
|
struct net_device *dev = mii->dev;
|
|
u32 advert, bmcr, lpa, nego;
|
|
u32 advert2 = 0, bmcr2 = 0, lpa2 = 0;
|
|
|
|
ecmd->supported =
|
|
(SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
|
|
SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
|
|
SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
|
|
if (mii->supports_gmii)
|
|
ecmd->supported |= SUPPORTED_1000baseT_Half |
|
|
SUPPORTED_1000baseT_Full;
|
|
|
|
/* only supports twisted-pair */
|
|
ecmd->port = PORT_MII;
|
|
|
|
/* only supports internal transceiver */
|
|
ecmd->transceiver = XCVR_INTERNAL;
|
|
|
|
/* this isn't fully supported at higher layers */
|
|
ecmd->phy_address = mii->phy_id;
|
|
|
|
ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
|
|
advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
|
|
if (mii->supports_gmii)
|
|
advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
|
|
|
|
if (advert & ADVERTISE_10HALF)
|
|
ecmd->advertising |= ADVERTISED_10baseT_Half;
|
|
if (advert & ADVERTISE_10FULL)
|
|
ecmd->advertising |= ADVERTISED_10baseT_Full;
|
|
if (advert & ADVERTISE_100HALF)
|
|
ecmd->advertising |= ADVERTISED_100baseT_Half;
|
|
if (advert & ADVERTISE_100FULL)
|
|
ecmd->advertising |= ADVERTISED_100baseT_Full;
|
|
if (advert2 & ADVERTISE_1000HALF)
|
|
ecmd->advertising |= ADVERTISED_1000baseT_Half;
|
|
if (advert2 & ADVERTISE_1000FULL)
|
|
ecmd->advertising |= ADVERTISED_1000baseT_Full;
|
|
|
|
bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
|
|
lpa = mii->mdio_read(dev, mii->phy_id, MII_LPA);
|
|
if (mii->supports_gmii) {
|
|
bmcr2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
|
|
lpa2 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000);
|
|
}
|
|
if (bmcr & BMCR_ANENABLE) {
|
|
ecmd->advertising |= ADVERTISED_Autoneg;
|
|
ecmd->autoneg = AUTONEG_ENABLE;
|
|
|
|
nego = mii_nway_result(advert & lpa);
|
|
if ((bmcr2 & (ADVERTISE_1000HALF | ADVERTISE_1000FULL)) &
|
|
(lpa2 >> 2))
|
|
ecmd->speed = SPEED_1000;
|
|
else if (nego == LPA_100FULL || nego == LPA_100HALF)
|
|
ecmd->speed = SPEED_100;
|
|
else
|
|
ecmd->speed = SPEED_10;
|
|
if ((lpa2 & LPA_1000FULL) || nego == LPA_100FULL ||
|
|
nego == LPA_10FULL) {
|
|
ecmd->duplex = DUPLEX_FULL;
|
|
mii->full_duplex = 1;
|
|
} else {
|
|
ecmd->duplex = DUPLEX_HALF;
|
|
mii->full_duplex = 0;
|
|
}
|
|
} else {
|
|
ecmd->autoneg = AUTONEG_DISABLE;
|
|
|
|
ecmd->speed = ((bmcr & BMCR_SPEED1000 &&
|
|
(bmcr & BMCR_SPEED100) == 0) ? SPEED_1000 :
|
|
(bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10);
|
|
ecmd->duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
|
|
}
|
|
|
|
/* ignore maxtxpkt, maxrxpkt for now */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
|
|
{
|
|
struct net_device *dev = mii->dev;
|
|
|
|
if (ecmd->speed != SPEED_10 &&
|
|
ecmd->speed != SPEED_100 &&
|
|
ecmd->speed != SPEED_1000)
|
|
return -EINVAL;
|
|
if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
|
|
return -EINVAL;
|
|
if (ecmd->port != PORT_MII)
|
|
return -EINVAL;
|
|
if (ecmd->transceiver != XCVR_INTERNAL)
|
|
return -EINVAL;
|
|
if (ecmd->phy_address != mii->phy_id)
|
|
return -EINVAL;
|
|
if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
|
|
return -EINVAL;
|
|
if ((ecmd->speed == SPEED_1000) && (!mii->supports_gmii))
|
|
return -EINVAL;
|
|
|
|
/* ignore supported, maxtxpkt, maxrxpkt */
|
|
|
|
if (ecmd->autoneg == AUTONEG_ENABLE) {
|
|
u32 bmcr, advert, tmp;
|
|
u32 advert2 = 0, tmp2 = 0;
|
|
|
|
if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
|
|
ADVERTISED_10baseT_Full |
|
|
ADVERTISED_100baseT_Half |
|
|
ADVERTISED_100baseT_Full |
|
|
ADVERTISED_1000baseT_Half |
|
|
ADVERTISED_1000baseT_Full)) == 0)
|
|
return -EINVAL;
|
|
|
|
/* advertise only what has been requested */
|
|
advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
|
|
tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
|
|
if (mii->supports_gmii) {
|
|
advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
|
|
tmp2 = advert2 & ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
|
|
}
|
|
if (ecmd->advertising & ADVERTISED_10baseT_Half)
|
|
tmp |= ADVERTISE_10HALF;
|
|
if (ecmd->advertising & ADVERTISED_10baseT_Full)
|
|
tmp |= ADVERTISE_10FULL;
|
|
if (ecmd->advertising & ADVERTISED_100baseT_Half)
|
|
tmp |= ADVERTISE_100HALF;
|
|
if (ecmd->advertising & ADVERTISED_100baseT_Full)
|
|
tmp |= ADVERTISE_100FULL;
|
|
if (mii->supports_gmii) {
|
|
if (ecmd->advertising & ADVERTISED_1000baseT_Half)
|
|
tmp2 |= ADVERTISE_1000HALF;
|
|
if (ecmd->advertising & ADVERTISED_1000baseT_Full)
|
|
tmp2 |= ADVERTISE_1000FULL;
|
|
}
|
|
if (advert != tmp) {
|
|
mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
|
|
mii->advertising = tmp;
|
|
}
|
|
if ((mii->supports_gmii) && (advert2 != tmp2))
|
|
mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
|
|
|
|
/* turn on autonegotiation, and force a renegotiate */
|
|
bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
|
|
bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
|
|
mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
|
|
|
|
mii->force_media = 0;
|
|
} else {
|
|
u32 bmcr, tmp;
|
|
|
|
/* turn off auto negotiation, set speed and duplexity */
|
|
bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
|
|
tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
|
|
BMCR_SPEED1000 | BMCR_FULLDPLX);
|
|
if (ecmd->speed == SPEED_1000)
|
|
tmp |= BMCR_SPEED1000;
|
|
else if (ecmd->speed == SPEED_100)
|
|
tmp |= BMCR_SPEED100;
|
|
if (ecmd->duplex == DUPLEX_FULL) {
|
|
tmp |= BMCR_FULLDPLX;
|
|
mii->full_duplex = 1;
|
|
} else
|
|
mii->full_duplex = 0;
|
|
if (bmcr != tmp)
|
|
mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
|
|
|
|
mii->force_media = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int mii_link_ok (struct mii_if_info *mii)
|
|
{
|
|
/* first, a dummy read, needed to latch some MII phys */
|
|
mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
|
|
if (mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR) & BMSR_LSTATUS)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
int mii_nway_restart (struct mii_if_info *mii)
|
|
{
|
|
int bmcr;
|
|
int r = -EINVAL;
|
|
|
|
/* if autoneg is off, it's an error */
|
|
bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR);
|
|
|
|
if (bmcr & BMCR_ANENABLE) {
|
|
bmcr |= BMCR_ANRESTART;
|
|
mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, bmcr);
|
|
r = 0;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
void mii_check_link (struct mii_if_info *mii)
|
|
{
|
|
int cur_link = mii_link_ok(mii);
|
|
int prev_link = netif_carrier_ok(mii->dev);
|
|
|
|
if (cur_link && !prev_link)
|
|
netif_carrier_on(mii->dev);
|
|
else if (prev_link && !cur_link)
|
|
netif_carrier_off(mii->dev);
|
|
}
|
|
|
|
unsigned int mii_check_media (struct mii_if_info *mii,
|
|
unsigned int ok_to_print,
|
|
unsigned int init_media)
|
|
{
|
|
unsigned int old_carrier, new_carrier;
|
|
int advertise, lpa, media, duplex;
|
|
int lpa2 = 0;
|
|
|
|
/* if forced media, go no further */
|
|
if (mii->force_media)
|
|
return 0; /* duplex did not change */
|
|
|
|
/* check current and old link status */
|
|
old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
|
|
new_carrier = (unsigned int) mii_link_ok(mii);
|
|
|
|
/* if carrier state did not change, this is a "bounce",
|
|
* just exit as everything is already set correctly
|
|
*/
|
|
if ((!init_media) && (old_carrier == new_carrier))
|
|
return 0; /* duplex did not change */
|
|
|
|
/* no carrier, nothing much to do */
|
|
if (!new_carrier) {
|
|
netif_carrier_off(mii->dev);
|
|
if (ok_to_print)
|
|
printk(KERN_INFO "%s: link down\n", mii->dev->name);
|
|
return 0; /* duplex did not change */
|
|
}
|
|
|
|
/*
|
|
* we have carrier, see who's on the other end
|
|
*/
|
|
netif_carrier_on(mii->dev);
|
|
|
|
/* get MII advertise and LPA values */
|
|
if ((!init_media) && (mii->advertising))
|
|
advertise = mii->advertising;
|
|
else {
|
|
advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE);
|
|
mii->advertising = advertise;
|
|
}
|
|
lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
|
|
if (mii->supports_gmii)
|
|
lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
|
|
|
|
/* figure out media and duplex from advertise and LPA values */
|
|
media = mii_nway_result(lpa & advertise);
|
|
duplex = (media & ADVERTISE_FULL) ? 1 : 0;
|
|
if (lpa2 & LPA_1000FULL)
|
|
duplex = 1;
|
|
|
|
if (ok_to_print)
|
|
printk(KERN_INFO "%s: link up, %sMbps, %s-duplex, lpa 0x%04X\n",
|
|
mii->dev->name,
|
|
lpa2 & (LPA_1000FULL | LPA_1000HALF) ? "1000" :
|
|
media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? "100" : "10",
|
|
duplex ? "full" : "half",
|
|
lpa);
|
|
|
|
if ((init_media) || (mii->full_duplex != duplex)) {
|
|
mii->full_duplex = duplex;
|
|
return 1; /* duplex changed */
|
|
}
|
|
|
|
return 0; /* duplex did not change */
|
|
}
|
|
|
|
int generic_mii_ioctl(struct mii_if_info *mii_if,
|
|
struct mii_ioctl_data *mii_data, int cmd,
|
|
unsigned int *duplex_chg_out)
|
|
{
|
|
int rc = 0;
|
|
unsigned int duplex_changed = 0;
|
|
|
|
if (duplex_chg_out)
|
|
*duplex_chg_out = 0;
|
|
|
|
mii_data->phy_id &= mii_if->phy_id_mask;
|
|
mii_data->reg_num &= mii_if->reg_num_mask;
|
|
|
|
switch(cmd) {
|
|
case SIOCGMIIPHY:
|
|
mii_data->phy_id = mii_if->phy_id;
|
|
/* fall through */
|
|
|
|
case SIOCGMIIREG:
|
|
mii_data->val_out =
|
|
mii_if->mdio_read(mii_if->dev, mii_data->phy_id,
|
|
mii_data->reg_num);
|
|
break;
|
|
|
|
case SIOCSMIIREG: {
|
|
u16 val = mii_data->val_in;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (mii_data->phy_id == mii_if->phy_id) {
|
|
switch(mii_data->reg_num) {
|
|
case MII_BMCR: {
|
|
unsigned int new_duplex = 0;
|
|
if (val & (BMCR_RESET|BMCR_ANENABLE))
|
|
mii_if->force_media = 0;
|
|
else
|
|
mii_if->force_media = 1;
|
|
if (mii_if->force_media &&
|
|
(val & BMCR_FULLDPLX))
|
|
new_duplex = 1;
|
|
if (mii_if->full_duplex != new_duplex) {
|
|
duplex_changed = 1;
|
|
mii_if->full_duplex = new_duplex;
|
|
}
|
|
break;
|
|
}
|
|
case MII_ADVERTISE:
|
|
mii_if->advertising = val;
|
|
break;
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
}
|
|
|
|
mii_if->mdio_write(mii_if->dev, mii_data->phy_id,
|
|
mii_data->reg_num, val);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
rc = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
if ((rc == 0) && (duplex_chg_out) && (duplex_changed))
|
|
*duplex_chg_out = 1;
|
|
|
|
return rc;
|
|
}
|
|
|
|
MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
|
|
MODULE_DESCRIPTION ("MII hardware support library");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
EXPORT_SYMBOL(mii_link_ok);
|
|
EXPORT_SYMBOL(mii_nway_restart);
|
|
EXPORT_SYMBOL(mii_ethtool_gset);
|
|
EXPORT_SYMBOL(mii_ethtool_sset);
|
|
EXPORT_SYMBOL(mii_check_link);
|
|
EXPORT_SYMBOL(mii_check_media);
|
|
EXPORT_SYMBOL(generic_mii_ioctl);
|
|
|