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[realtek] Forcibly enable advertisement of 1000Mbps speeds

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Some RTL8169 cards (observed with an RTL8169SC) power up advertising
only 100Mbps, despite being capable of 1000Mbps.  Forcibly enable
advertisement of 1000Mbps on any RTL8169-like card.

This change relies on the assumption that the CTRL1000 register will
not exist on 100Mbps-only RTL8169 cards such as the RTL8101.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-08-23 22:44:20 +01:00
parent 6e50e7950f
commit 5676abead2
1 changed files with 72 additions and 7 deletions
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79
src/drivers/net/realtek.c
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@ -272,6 +272,75 @@ static int realtek_reset ( struct realtek_nic *rtl ) {
return -ETIMEDOUT;
}
/**
* Configure PHY for Gigabit operation
*
* @v rtl Realtek device
* @ret rc Return status code
*/
static int realtek_phy_speed ( struct realtek_nic *rtl ) {
int ctrl1000;
int rc;
/* Read CTRL1000 register */
ctrl1000 = mii_read ( &rtl->mii, MII_CTRL1000 );
if ( ctrl1000 < 0 ) {
rc = ctrl1000;
DBGC ( rtl, "REALTEK %p could not read CTRL1000: %s\n",
rtl, strerror ( rc ) );
return rc;
}
/* Advertise 1000Mbps speeds */
ctrl1000 |= ( ADVERTISE_1000FULL | ADVERTISE_1000HALF );
if ( ( rc = mii_write ( &rtl->mii, MII_CTRL1000, ctrl1000 ) ) != 0 ) {
DBGC ( rtl, "REALTEK %p could not write CTRL1000: %s\n",
rtl, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Reset PHY
*
* @v rtl Realtek device
* @ret rc Return status code
*/
static int realtek_phy_reset ( struct realtek_nic *rtl ) {
int rc;
/* Do nothing if we have no separate PHY register access */
if ( ! rtl->have_phy_regs )
return 0;
/* Perform MII reset */
if ( ( rc = mii_reset ( &rtl->mii ) ) != 0 ) {
DBGC ( rtl, "REALTEK %p could not reset MII: %s\n",
rtl, strerror ( rc ) );
return rc;
}
/* Some cards (e.g. RTL8169SC) do not advertise Gigabit by
* default. Try to enable advertisement of Gigabit speeds.
*/
if ( ( rc = realtek_phy_speed ( rtl ) ) != 0 ) {
/* Ignore failures, since the register may not be
* present on non-Gigabit PHYs (e.g. RTL8101).
*/
}
/* Restart autonegotiation */
if ( ( rc = mii_restart ( &rtl->mii ) ) != 0 ) {
DBGC ( rtl, "REALTEK %p could not restart MII: %s\n",
rtl, strerror ( rc ) );
return rc;
}
return 0;
}
/******************************************************************************
*
* Link state
@ -970,12 +1039,8 @@ static int realtek_probe ( struct pci_device *pci ) {
/* Initialise and reset MII interface */
mii_init ( &rtl->mii, &realtek_mii_operations );
if ( rtl->have_phy_regs &&
( ( rc = mii_reset ( &rtl->mii ) ) != 0 ) ) {
DBGC ( rtl, "REALTEK %p could not reset MII: %s\n",
rtl, strerror ( rc ) );
goto err_mii_reset;
}
if ( ( rc = realtek_phy_reset ( rtl ) ) != 0 )
goto err_phy_reset;
/* Register network device */
if ( ( rc = register_netdev ( netdev ) ) != 0 )
@ -996,7 +1061,7 @@ static int realtek_probe ( struct pci_device *pci ) {
err_register_nvo:
unregister_netdev ( netdev );
err_register_netdev:
err_mii_reset:
err_phy_reset:
err_nvs_read:
realtek_reset ( rtl );
err_reset: