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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Stefan Eichenberger , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 4/4] net: phy: marvell-88q2xxx: add driver for the Marvell 88Q2220 PHY Date: Thu, 21 Dec 2023 08:28:51 +0100 Message-Id: <20231221072853.107678-5-dima.fedrau@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231221072853.107678-1-dima.fedrau@gmail.com> References: <20231219093554.GA6393@debian> <20231221072853.107678-1-dima.fedrau@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1785385119439851027 X-GMAIL-MSGID: 1785875779313764761 Add a driver for the Marvell 88Q2220. This driver allows to detect the link, switch between 100BASE-T1 and 1000BASE-T1 and switch between master and slave mode and autonegotiation. Signed-off-by: Dimitri Fedrau --- drivers/net/phy/marvell-88q2xxx.c | 310 ++++++++++++++++++++++++++++-- include/linux/marvell_phy.h | 1 + 2 files changed, 300 insertions(+), 11 deletions(-) diff --git a/drivers/net/phy/marvell-88q2xxx.c b/drivers/net/phy/marvell-88q2xxx.c index 1c3ff77de56b..4e930b5ffaef 100644 --- a/drivers/net/phy/marvell-88q2xxx.c +++ b/drivers/net/phy/marvell-88q2xxx.c @@ -27,6 +27,13 @@ #define MDIO_MMD_PCS_MV_100BT1_STAT2_LINK 0x0004 #define MDIO_MMD_PCS_MV_100BT1_STAT2_ANGE 0x0008 +#define MDIO_MMD_PCS_MV_RX_STAT 33328 + +#define MDIO_MMD_AN_MV_STAT2 32794 +#define MDIO_MMD_AN_MV_STAT2_AN_RESOLVED 0x0800 +#define MDIO_MMD_AN_MV_STAT2_100BT1 0x2000 +#define MDIO_MMD_AN_MV_STAT2_1000BT1 0x4000 + static int mv88q2xxx_soft_reset(struct phy_device *phydev) { int ret; @@ -120,24 +127,87 @@ static int mv88q2xxx_read_link_100m(struct phy_device *phydev) static int mv88q2xxx_read_link(struct phy_device *phydev) { - int ret; - /* The 88Q2XXX PHYs do not have the PMA/PMD status register available, * therefore we need to read the link status from the vendor specific * registers depending on the speed. */ + if (phydev->speed == SPEED_1000) - ret = mv88q2xxx_read_link_gbit(phydev); + return mv88q2xxx_read_link_gbit(phydev); + else if (phydev->speed == SPEED_100) + return mv88q2xxx_read_link_100m(phydev); + + phydev->link = false; + return 0; +} + +static int mv88q2xxx_read_master_slave_state(struct phy_device *phydev) +{ + int ret; + + phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; + ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_MMD_AN_MV_STAT); + if (ret < 0) + return ret; + + if (ret & MDIO_MMD_AN_MV_STAT_LOCAL_MASTER) + phydev->master_slave_state = MASTER_SLAVE_STATE_MASTER; else - ret = mv88q2xxx_read_link_100m(phydev); + phydev->master_slave_state = MASTER_SLAVE_STATE_SLAVE; + + return 0; +} + +static int mv88q2xxx_read_aneg_speed(struct phy_device *phydev) +{ + int ret; - return ret; + phydev->speed = SPEED_UNKNOWN; + + ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_MMD_AN_MV_STAT2); + if (ret < 0) + return ret; + + if (!(ret & MDIO_MMD_AN_MV_STAT2_AN_RESOLVED)) + return 0; + + if (ret & MDIO_MMD_AN_MV_STAT2_100BT1) + phydev->speed = SPEED_100; + else if (ret & MDIO_MMD_AN_MV_STAT2_1000BT1) + phydev->speed = SPEED_1000; + + return 0; } static int mv88q2xxx_read_status(struct phy_device *phydev) { int ret; + if (phydev->autoneg == AUTONEG_ENABLE) { + phydev->duplex = DUPLEX_FULL; + + /* We have to get the negotiated speed first, otherwise we are + * not able to read the link. + */ + ret = mv88q2xxx_read_aneg_speed(phydev); + if (ret < 0) + return ret; + + ret = mv88q2xxx_read_link(phydev); + if (ret < 0) + return ret; + + ret = genphy_c45_read_lpa(phydev); + if (ret < 0) + return ret; + + ret = genphy_c45_baset1_read_status(phydev); + if (ret < 0) + return ret; + + return mv88q2xxx_read_master_slave_state(phydev); + } + ret = mv88q2xxx_read_link(phydev); if (ret < 0) return ret; @@ -166,7 +236,9 @@ static int mv88q2xxx_get_features(struct phy_device *phydev) * sequence provided by Marvell. Disable it for now until a proper * workaround is found or a new PHY revision is released. */ - linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported); + if (phydev->drv->phy_id == MARVELL_PHY_ID_88Q2110) + linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, + phydev->supported); return 0; } @@ -192,6 +264,9 @@ static int mv88q2xxx_config_init(struct phy_device *phydev) */ phydev->pma_extable = MDIO_PMA_EXTABLE_BT1; + if (phydev->drv->phy_id == MARVELL_PHY_ID_88Q2220) + return 0; + /* Read the current PHY configuration */ ret = genphy_c45_read_pma(phydev); if (ret) @@ -200,7 +275,7 @@ static int mv88q2xxx_config_init(struct phy_device *phydev) return mv88q2xxx_config_aneg(phydev); } -static int mv88q2xxxx_get_sqi(struct phy_device *phydev) +static int mv88q2xxx_get_sqi(struct phy_device *phydev) { int ret; @@ -208,7 +283,8 @@ static int mv88q2xxxx_get_sqi(struct phy_device *phydev) /* Read the SQI from the vendor specific receiver status * register */ - ret = phy_read_mmd(phydev, MDIO_MMD_PCS, 0x8230); + ret = phy_read_mmd(phydev, MDIO_MMD_PCS, + MDIO_MMD_PCS_MV_RX_STAT); if (ret < 0) return ret; @@ -230,11 +306,208 @@ static int mv88q2xxxx_get_sqi(struct phy_device *phydev) return ret & 0x0F; } -static int mv88q2xxxx_get_sqi_max(struct phy_device *phydev) +static int mv88q2xxx_get_sqi_max(struct phy_device *phydev) { return 15; } +static int mv88q222x_soft_reset(struct phy_device *phydev) +{ + int ret; + + /* Enable RESET of DCL */ + if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed == SPEED_1000) { + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x48); + if (ret < 0) + return ret; + } + + /* Soft reset */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_1000BT1_CTRL, + MDIO_PCS_1000BT1_CTRL_RESET); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xffe4, 0xc); + if (ret < 0) + return ret; + + /* Disable RESET of DCL */ + if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed == SPEED_1000) + return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x58); + else + return ret; +} + +static int mv88q222x_config_aneg_gbit(struct phy_device *phydev) +{ + int ret; + + /* send_s detection threshold, slave and master */ + ret = phy_write_mmd(phydev, MDIO_MMD_AN, 0x8032, 0x2020); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_AN, 0x8031, 0xa28); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_AN, 0x8031, 0xc28); + if (ret < 0) + return ret; + + /* Disable DCL calibratin during tear down */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xffdb, 0xfc10); + if (ret < 0) + return ret; + + /* Disable RESET of DCL*/ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x58); + if (ret < 0) + return ret; + + /* Turn CM Clamp ON */ + return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe79, 0x4); +} + +static int mv88q222x_config_aneg_100m(struct phy_device *phydev) +{ + int ret; + + /* Update Initial FFE Coefficients */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfbba, 0xcb2); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfbbb, 0xc4a); + if (ret < 0) + return ret; + + /* Turn CM Clamp ON */ + return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe79, 0x4); +} + +static int mv88q222x_config_aneg_preinit(struct phy_device *phydev) +{ + int ret, val, i; + + /* Enable txdac */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8033, 0x6801); + if (ret < 0) + return ret; + + /* Disable ANEG */ + ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_CTRL, 0x0); + if (ret < 0) + return ret; + + /* Set IEEE power down */ + ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, + MDIO_CTRL1_LPOWER | MDIO_PMA_CTRL1_SPEED1000); + if (ret < 0) + return ret; + + /* Exit standby state(internal state) */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x48); + if (ret < 0) + return ret; + + /* Set power management state breakpoint (internal state) */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xffe4, 0x6b6); + if (ret < 0) + return ret; + + /* Exit IEEE power down */ + ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, 0x0); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, 0x0); + if (ret < 0) + return ret; + + /* Wait up to 5ms to enter to power management state, if we do not meet + * the target value, it is still ok to proceed + */ + for (i = 0; i < 5; i++) { + val = phy_read_mmd(phydev, MDIO_MMD_PCS, 0xffe4); + if (val == 0x6ba) + break; + + usleep_range(1000, 2000); + } + + /* Turn CM Clamp OFF */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe79, 0x0); + if (ret < 0) + return ret; + + /* mdi vcm */ + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe07, 0x125a); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe09, 0x1288); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe08, 0x2588); + if (ret < 0) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe11, 0x1105); + if (ret < 0) + return ret; + + /* aux_boost */ + return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe72, 0x042c); +} + +static int mv88q222x_config_aneg_init_b0(struct phy_device *phydev) +{ + int ret; + + ret = mv88q222x_config_aneg_preinit(phydev); + if (ret < 0) + return ret; + + if (phydev->autoneg == AUTONEG_DISABLE) { + if (phydev->speed == SPEED_100) + return mv88q222x_config_aneg_100m(phydev); + else + return mv88q222x_config_aneg_gbit(phydev); + } + + ret = mv88q222x_config_aneg_100m(phydev); + if (ret) + return ret; + + ret = mv88q222x_config_aneg_gbit(phydev); + if (ret) + return ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe5f, 0xe8); + if (ret) + return ret; + + return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe05, 0x755c); +} + +static int mv88q222x_config_aneg(struct phy_device *phydev) +{ + int ret; + + ret = mv88q222x_config_aneg_init_b0(phydev); + if (ret < 0) + return ret; + + ret = genphy_c45_config_aneg(phydev); + if (ret) + return ret; + + return mv88q222x_soft_reset(phydev); +} + static struct phy_driver mv88q2xxx_driver[] = { { .phy_id = MARVELL_PHY_ID_88Q2110, @@ -246,8 +519,22 @@ static struct phy_driver mv88q2xxx_driver[] = { .read_status = mv88q2xxx_read_status, .soft_reset = mv88q2xxx_soft_reset, .set_loopback = genphy_c45_loopback, - .get_sqi = mv88q2xxxx_get_sqi, - .get_sqi_max = mv88q2xxxx_get_sqi_max, + .get_sqi = mv88q2xxx_get_sqi, + .get_sqi_max = mv88q2xxx_get_sqi_max, + }, + { + .phy_id = MARVELL_PHY_ID_88Q2220, + .phy_id_mask = MARVELL_PHY_ID_MASK, + .name = "mv88q2220", + .get_features = mv88q2xxx_get_features, + .config_aneg = mv88q222x_config_aneg, + .aneg_done = genphy_c45_aneg_done, + .config_init = mv88q2xxx_config_init, + .read_status = mv88q2xxx_read_status, + .soft_reset = mv88q222x_soft_reset, + .set_loopback = genphy_c45_loopback, + .get_sqi = mv88q2xxx_get_sqi, + .get_sqi_max = mv88q2xxx_get_sqi_max, }, }; @@ -255,6 +542,7 @@ module_phy_driver(mv88q2xxx_driver); static struct mdio_device_id __maybe_unused mv88q2xxx_tbl[] = { { MARVELL_PHY_ID_88Q2110, MARVELL_PHY_ID_MASK }, + { MARVELL_PHY_ID_88Q2220, MARVELL_PHY_ID_MASK }, { /*sentinel*/ } }; MODULE_DEVICE_TABLE(mdio, mv88q2xxx_tbl); diff --git a/include/linux/marvell_phy.h b/include/linux/marvell_phy.h index 9b54c4f0677f..693eba9869e4 100644 --- a/include/linux/marvell_phy.h +++ b/include/linux/marvell_phy.h @@ -26,6 +26,7 @@ #define MARVELL_PHY_ID_88E2110 0x002b09b0 #define MARVELL_PHY_ID_88X2222 0x01410f10 #define MARVELL_PHY_ID_88Q2110 0x002b0980 +#define MARVELL_PHY_ID_88Q2220 0x002b0b20 /* Marvel 88E1111 in Finisar SFP module with modified PHY ID */ #define MARVELL_PHY_ID_88E1111_FINISAR 0x01ff0cc0