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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");

1
drivers/net/phy/bcm-phy-lib.h
View File

@ -65,5 +65,6 @@ void bcm_phy_get_stats(struct phy_device *phydev, u64 *shadow,
struct ethtool_stats *stats, u64 *data);
void bcm_phy_r_rc_cal_reset(struct phy_device *phydev);
int bcm_phy_28nm_a0b0_afe_config_init(struct phy_device *phydev);
int bcm_phy_enable_jumbo(struct phy_device *phydev);
#endif /* _LINUX_BCM_PHY_LIB_H */

4
drivers/net/phy/bcm7xxx.c
View File

@ -178,6 +178,10 @@ static int bcm7xxx_28nm_config_init(struct phy_device *phydev)
break;
}
if (ret)
return ret;
ret = bcm_phy_enable_jumbo(phydev);
if (ret)
return ret;

2
include/linux/brcmphy.h
View File

@ -79,6 +79,7 @@
#define MII_BCM54XX_ECR 0x10 /* BCM54xx extended control register */
#define MII_BCM54XX_ECR_IM 0x1000 /* Interrupt mask */
#define MII_BCM54XX_ECR_IF 0x0800 /* Interrupt force */
#define MII_BCM54XX_ECR_FIFOE 0x0001 /* FIFO elasticity */
#define MII_BCM54XX_ESR 0x11 /* BCM54xx extended status register */
#define MII_BCM54XX_ESR_IS 0x1000 /* Interrupt status */
@ -119,6 +120,7 @@
#define MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL 0x00
#define MII_BCM54XX_AUXCTL_ACTL_TX_6DB 0x0400
#define MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA 0x0800
#define MII_BCM54XX_AUXCTL_ACTL_EXT_PKT_LEN 0x4000
#define MII_BCM54XX_AUXCTL_SHDWSEL_MISC 0x07
#define MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN 0x0010