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net: phy: nxp-c45-tja11xx: add TJA112XB SGMII PCS restart errata

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TJA1120B/TJA1121B can achieve a stable operation of SGMII after
a startup event by putting the SGMII PCS into power down mode and
restart afterwards.

It is necessary to put the SGMII PCS into power down mode and back up.

Cc: stable@vger.kernel.org
Fixes: f1fe5dff2b ("net: phy: nxp-c45-tja11xx: add TJA1120 support")
Signed-off-by: Andrei Botila <andrei.botila@oss.nxp.com>
Link: https://patch.msgid.link/20250304160619.181046-3-andrei.botila@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Andrei Botila 2025-03-04 18:06:14 +02:00 committed by Jakub Kicinski
parent a07364b394
commit 4893952384
1 changed files with 18 additions and 2 deletions
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20
drivers/net/phy/nxp-c45-tja11xx.c
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@ -114,6 +114,9 @@
#define MII_BASIC_CONFIG_RMII 0x5
#define MII_BASIC_CONFIG_MII 0x4
#define VEND1_SGMII_BASIC_CONTROL 0xB000
#define SGMII_LPM BIT(11)
#define VEND1_SYMBOL_ERROR_CNT_XTD 0x8351
#define EXTENDED_CNT_EN BIT(15)
#define VEND1_MONITOR_STATUS 0xAC80
@ -1598,11 +1601,11 @@ static int nxp_c45_set_phy_mode(struct phy_device *phydev)
return 0;
}
/* Errata: ES_TJA1120 and ES_TJA1121 Rev. 1.0 — 28 November 2024 Section 3.1 */
/* Errata: ES_TJA1120 and ES_TJA1121 Rev. 1.0 — 28 November 2024 Section 3.1 & 3.2 */
static void nxp_c45_tja1120_errata(struct phy_device *phydev)
{
bool macsec_ability, sgmii_ability;
int silicon_version, sample_type;
bool macsec_ability;
int phy_abilities;
int ret = 0;
@ -1619,6 +1622,7 @@ static void nxp_c45_tja1120_errata(struct phy_device *phydev)
phy_abilities = phy_read_mmd(phydev, MDIO_MMD_VEND1,
VEND1_PORT_ABILITIES);
macsec_ability = !!(phy_abilities & MACSEC_ABILITY);
sgmii_ability = !!(phy_abilities & SGMII_ABILITY);
if ((!macsec_ability && silicon_version == 2) ||
(macsec_ability && silicon_version == 1)) {
/* TJA1120/TJA1121 PHY configuration errata workaround.
@ -1639,6 +1643,18 @@ static void nxp_c45_tja1120_errata(struct phy_device *phydev)
phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x01F8, 0x0);
phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x01F9, 0x0);
if (sgmii_ability) {
/* TJA1120B/TJA1121B SGMII PCS restart errata workaround.
* Put SGMII PCS into power down mode and back up.
*/
phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
VEND1_SGMII_BASIC_CONTROL,
SGMII_LPM);
phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
VEND1_SGMII_BASIC_CONTROL,
SGMII_LPM);
}
}
}