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net: phy: bcm7xx: add jumbo frame configuration to PHY

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The BCM7XX PHY family requires special configuration to pass jumbo
frames. Do that during initial PHY setup.

Signed-off-by: Murali Krishna Policharla <murali.policharla@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Murali Krishna Policharla
2020-03-27 21:55:40 +02:00
committed by David S. Miller
parent 22f33971aa
commit ab41ca3455
4 changed files with 29 additions and 0 deletions
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22
drivers/net/phy/bcm-phy-lib.c
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@@ -423,6 +423,28 @@ int bcm_phy_28nm_a0b0_afe_config_init(struct phy_device *phydev)
}
EXPORT_SYMBOL_GPL(bcm_phy_28nm_a0b0_afe_config_init);
int bcm_phy_enable_jumbo(struct phy_device *phydev)
{
int ret;
ret = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL);
if (ret < 0)
return ret;
/* Enable extended length packet reception */
ret = bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL,
ret | MII_BCM54XX_AUXCTL_ACTL_EXT_PKT_LEN);
if (ret < 0)
return ret;
/* Enable the elastic FIFO for raising the transmission limit from
* 4.5KB to 10KB, at the expense of an additional 16 ns in propagation
* latency.
*/
return phy_set_bits(phydev, MII_BCM54XX_ECR, MII_BCM54XX_ECR_FIFOE);
}
EXPORT_SYMBOL_GPL(bcm_phy_enable_jumbo);
MODULE_DESCRIPTION("Broadcom PHY Library");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Broadcom Corporation");