diff options
Diffstat (limited to 'drivers/net/phy/marvell-88x2222.c')
| -rw-r--r-- | drivers/net/phy/marvell-88x2222.c | 624 |
1 files changed, 624 insertions, 0 deletions
diff --git a/drivers/net/phy/marvell-88x2222.c b/drivers/net/phy/marvell-88x2222.c new file mode 100644 index 000000000..fd9ad4820 --- /dev/null +++ b/drivers/net/phy/marvell-88x2222.c @@ -0,0 +1,624 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Marvell 88x2222 dual-port multi-speed ethernet transceiver. + * + * Supports: + * XAUI on the host side. + * 1000Base-X or 10GBase-R on the line side. + * SGMII over 1000Base-X. + */ +#include <linux/module.h> +#include <linux/phy.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/mdio.h> +#include <linux/marvell_phy.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/sfp.h> +#include <linux/netdevice.h> + +/* Port PCS Configuration */ +#define MV_PCS_CONFIG 0xF002 +#define MV_PCS_HOST_XAUI 0x73 +#define MV_PCS_LINE_10GBR (0x71 << 8) +#define MV_PCS_LINE_1GBX_AN (0x7B << 8) +#define MV_PCS_LINE_SGMII_AN (0x7F << 8) + +/* Port Reset and Power Down */ +#define MV_PORT_RST 0xF003 +#define MV_LINE_RST_SW BIT(15) +#define MV_HOST_RST_SW BIT(7) +#define MV_PORT_RST_SW (MV_LINE_RST_SW | MV_HOST_RST_SW) + +/* PMD Receive Signal Detect */ +#define MV_RX_SIGNAL_DETECT 0x000A +#define MV_RX_SIGNAL_DETECT_GLOBAL BIT(0) + +/* 1000Base-X/SGMII Control Register */ +#define MV_1GBX_CTRL (0x2000 + MII_BMCR) + +/* 1000BASE-X/SGMII Status Register */ +#define MV_1GBX_STAT (0x2000 + MII_BMSR) + +/* 1000Base-X Auto-Negotiation Advertisement Register */ +#define MV_1GBX_ADVERTISE (0x2000 + MII_ADVERTISE) + +/* 1000Base-X PHY Specific Status Register */ +#define MV_1GBX_PHY_STAT 0xA003 +#define MV_1GBX_PHY_STAT_AN_RESOLVED BIT(11) +#define MV_1GBX_PHY_STAT_DUPLEX BIT(13) +#define MV_1GBX_PHY_STAT_SPEED100 BIT(14) +#define MV_1GBX_PHY_STAT_SPEED1000 BIT(15) + +#define AUTONEG_TIMEOUT 3 + +struct mv2222_data { + phy_interface_t line_interface; + __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); + bool sfp_link; +}; + +/* SFI PMA transmit enable */ +static int mv2222_tx_enable(struct phy_device *phydev) +{ + return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_TXDIS, + MDIO_PMD_TXDIS_GLOBAL); +} + +/* SFI PMA transmit disable */ +static int mv2222_tx_disable(struct phy_device *phydev) +{ + return phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_TXDIS, + MDIO_PMD_TXDIS_GLOBAL); +} + +static int mv2222_soft_reset(struct phy_device *phydev) +{ + int val, ret; + + ret = phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PORT_RST, + MV_PORT_RST_SW); + if (ret < 0) + return ret; + + return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND2, MV_PORT_RST, + val, !(val & MV_PORT_RST_SW), + 5000, 1000000, true); +} + +static int mv2222_disable_aneg(struct phy_device *phydev) +{ + int ret = phy_clear_bits_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL, + BMCR_ANENABLE | BMCR_ANRESTART); + if (ret < 0) + return ret; + + return mv2222_soft_reset(phydev); +} + +static int mv2222_enable_aneg(struct phy_device *phydev) +{ + int ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL, + BMCR_ANENABLE | BMCR_RESET); + if (ret < 0) + return ret; + + return mv2222_soft_reset(phydev); +} + +static int mv2222_set_sgmii_speed(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + + switch (phydev->speed) { + default: + case SPEED_1000: + if ((linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, + priv->supported))) + return phy_modify_mmd(phydev, MDIO_MMD_PCS, + MV_1GBX_CTRL, + BMCR_SPEED1000 | BMCR_SPEED100, + BMCR_SPEED1000); + + fallthrough; + case SPEED_100: + if ((linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, + priv->supported))) + return phy_modify_mmd(phydev, MDIO_MMD_PCS, + MV_1GBX_CTRL, + BMCR_SPEED1000 | BMCR_SPEED100, + BMCR_SPEED100); + fallthrough; + case SPEED_10: + if ((linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, + priv->supported))) + return phy_modify_mmd(phydev, MDIO_MMD_PCS, + MV_1GBX_CTRL, + BMCR_SPEED1000 | BMCR_SPEED100, + BMCR_SPEED10); + + return -EINVAL; + } +} + +static bool mv2222_is_10g_capable(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + + return (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, + priv->supported)); +} + +static bool mv2222_is_1gbx_capable(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + + return linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, + priv->supported); +} + +static bool mv2222_is_sgmii_capable(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + + return (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, + priv->supported)); +} + +static int mv2222_config_line(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + + switch (priv->line_interface) { + case PHY_INTERFACE_MODE_10GBASER: + return phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG, + MV_PCS_HOST_XAUI | MV_PCS_LINE_10GBR); + case PHY_INTERFACE_MODE_1000BASEX: + return phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG, + MV_PCS_HOST_XAUI | MV_PCS_LINE_1GBX_AN); + case PHY_INTERFACE_MODE_SGMII: + return phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG, + MV_PCS_HOST_XAUI | MV_PCS_LINE_SGMII_AN); + default: + return -EINVAL; + } +} + +/* Switch between 1G (1000Base-X/SGMII) and 10G (10GBase-R) modes */ +static int mv2222_swap_line_type(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + bool changed = false; + int ret; + + switch (priv->line_interface) { + case PHY_INTERFACE_MODE_10GBASER: + if (mv2222_is_1gbx_capable(phydev)) { + priv->line_interface = PHY_INTERFACE_MODE_1000BASEX; + changed = true; + } + + if (mv2222_is_sgmii_capable(phydev)) { + priv->line_interface = PHY_INTERFACE_MODE_SGMII; + changed = true; + } + + break; + case PHY_INTERFACE_MODE_1000BASEX: + case PHY_INTERFACE_MODE_SGMII: + if (mv2222_is_10g_capable(phydev)) { + priv->line_interface = PHY_INTERFACE_MODE_10GBASER; + changed = true; + } + + break; + default: + return -EINVAL; + } + + if (changed) { + ret = mv2222_config_line(phydev); + if (ret < 0) + return ret; + } + + return 0; +} + +static int mv2222_setup_forced(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + int ret; + + if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER) { + if (phydev->speed < SPEED_10000 && + phydev->speed != SPEED_UNKNOWN) { + ret = mv2222_swap_line_type(phydev); + if (ret < 0) + return ret; + } + } + + if (priv->line_interface == PHY_INTERFACE_MODE_SGMII) { + ret = mv2222_set_sgmii_speed(phydev); + if (ret < 0) + return ret; + } + + return mv2222_disable_aneg(phydev); +} + +static int mv2222_config_aneg(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + int ret, adv; + + /* SFP is not present, do nothing */ + if (priv->line_interface == PHY_INTERFACE_MODE_NA) + return 0; + + if (phydev->autoneg == AUTONEG_DISABLE || + priv->line_interface == PHY_INTERFACE_MODE_10GBASER) + return mv2222_setup_forced(phydev); + + adv = linkmode_adv_to_mii_adv_x(priv->supported, + ETHTOOL_LINK_MODE_1000baseX_Full_BIT); + + ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_ADVERTISE, + ADVERTISE_1000XFULL | + ADVERTISE_1000XPAUSE | ADVERTISE_1000XPSE_ASYM, + adv); + if (ret < 0) + return ret; + + return mv2222_enable_aneg(phydev); +} + +static int mv2222_aneg_done(struct phy_device *phydev) +{ + int ret; + + if (mv2222_is_10g_capable(phydev)) { + ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1); + if (ret < 0) + return ret; + + if (ret & MDIO_STAT1_LSTATUS) + return 1; + } + + ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT); + if (ret < 0) + return ret; + + return (ret & BMSR_ANEGCOMPLETE); +} + +/* Returns negative on error, 0 if link is down, 1 if link is up */ +static int mv2222_read_status_10g(struct phy_device *phydev) +{ + static int timeout; + int val, link = 0; + + val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1); + if (val < 0) + return val; + + if (val & MDIO_STAT1_LSTATUS) { + link = 1; + + /* 10GBASE-R do not support auto-negotiation */ + phydev->autoneg = AUTONEG_DISABLE; + phydev->speed = SPEED_10000; + phydev->duplex = DUPLEX_FULL; + } else { + if (phydev->autoneg == AUTONEG_ENABLE) { + timeout++; + + if (timeout > AUTONEG_TIMEOUT) { + timeout = 0; + + val = mv2222_swap_line_type(phydev); + if (val < 0) + return val; + + return mv2222_config_aneg(phydev); + } + } + } + + return link; +} + +/* Returns negative on error, 0 if link is down, 1 if link is up */ +static int mv2222_read_status_1g(struct phy_device *phydev) +{ + static int timeout; + int val, link = 0; + + val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT); + if (val < 0) + return val; + + if (phydev->autoneg == AUTONEG_ENABLE && + !(val & BMSR_ANEGCOMPLETE)) { + timeout++; + + if (timeout > AUTONEG_TIMEOUT) { + timeout = 0; + + val = mv2222_swap_line_type(phydev); + if (val < 0) + return val; + + return mv2222_config_aneg(phydev); + } + + return 0; + } + + if (!(val & BMSR_LSTATUS)) + return 0; + + link = 1; + + val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_PHY_STAT); + if (val < 0) + return val; + + if (val & MV_1GBX_PHY_STAT_AN_RESOLVED) { + if (val & MV_1GBX_PHY_STAT_DUPLEX) + phydev->duplex = DUPLEX_FULL; + else + phydev->duplex = DUPLEX_HALF; + + if (val & MV_1GBX_PHY_STAT_SPEED1000) + phydev->speed = SPEED_1000; + else if (val & MV_1GBX_PHY_STAT_SPEED100) + phydev->speed = SPEED_100; + else + phydev->speed = SPEED_10; + } + + return link; +} + +static bool mv2222_link_is_operational(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + int val; + + val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MV_RX_SIGNAL_DETECT); + if (val < 0 || !(val & MV_RX_SIGNAL_DETECT_GLOBAL)) + return false; + + if (phydev->sfp_bus && !priv->sfp_link) + return false; + + return true; +} + +static int mv2222_read_status(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + int link; + + phydev->link = 0; + phydev->speed = SPEED_UNKNOWN; + phydev->duplex = DUPLEX_UNKNOWN; + + if (!mv2222_link_is_operational(phydev)) + return 0; + + if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER) + link = mv2222_read_status_10g(phydev); + else + link = mv2222_read_status_1g(phydev); + + if (link < 0) + return link; + + phydev->link = link; + + return 0; +} + +static int mv2222_resume(struct phy_device *phydev) +{ + return mv2222_tx_enable(phydev); +} + +static int mv2222_suspend(struct phy_device *phydev) +{ + return mv2222_tx_disable(phydev); +} + +static int mv2222_get_features(struct phy_device *phydev) +{ + /* All supported linkmodes are set at probe */ + + return 0; +} + +static int mv2222_config_init(struct phy_device *phydev) +{ + if (phydev->interface != PHY_INTERFACE_MODE_XAUI) + return -EINVAL; + + return 0; +} + +static int mv2222_sfp_insert(void *upstream, const struct sfp_eeprom_id *id) +{ + DECLARE_PHY_INTERFACE_MASK(interfaces); + struct phy_device *phydev = upstream; + phy_interface_t sfp_interface; + struct mv2222_data *priv; + struct device *dev; + int ret; + + __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_supported) = { 0, }; + + priv = (struct mv2222_data *)phydev->priv; + dev = &phydev->mdio.dev; + + sfp_parse_support(phydev->sfp_bus, id, sfp_supported, interfaces); + phydev->port = sfp_parse_port(phydev->sfp_bus, id, sfp_supported); + sfp_interface = sfp_select_interface(phydev->sfp_bus, sfp_supported); + + dev_info(dev, "%s SFP module inserted\n", phy_modes(sfp_interface)); + + if (sfp_interface != PHY_INTERFACE_MODE_10GBASER && + sfp_interface != PHY_INTERFACE_MODE_1000BASEX && + sfp_interface != PHY_INTERFACE_MODE_SGMII) { + dev_err(dev, "Incompatible SFP module inserted\n"); + + return -EINVAL; + } + + priv->line_interface = sfp_interface; + linkmode_and(priv->supported, phydev->supported, sfp_supported); + + ret = mv2222_config_line(phydev); + if (ret < 0) + return ret; + + if (mutex_trylock(&phydev->lock)) { + ret = mv2222_config_aneg(phydev); + mutex_unlock(&phydev->lock); + } + + return ret; +} + +static void mv2222_sfp_remove(void *upstream) +{ + struct phy_device *phydev = upstream; + struct mv2222_data *priv; + + priv = (struct mv2222_data *)phydev->priv; + + priv->line_interface = PHY_INTERFACE_MODE_NA; + linkmode_zero(priv->supported); + phydev->port = PORT_NONE; +} + +static void mv2222_sfp_link_up(void *upstream) +{ + struct phy_device *phydev = upstream; + struct mv2222_data *priv; + + priv = phydev->priv; + priv->sfp_link = true; +} + +static void mv2222_sfp_link_down(void *upstream) +{ + struct phy_device *phydev = upstream; + struct mv2222_data *priv; + + priv = phydev->priv; + priv->sfp_link = false; +} + +static const struct sfp_upstream_ops sfp_phy_ops = { + .module_insert = mv2222_sfp_insert, + .module_remove = mv2222_sfp_remove, + .link_up = mv2222_sfp_link_up, + .link_down = mv2222_sfp_link_down, + .attach = phy_sfp_attach, + .detach = phy_sfp_detach, +}; + +static int mv2222_probe(struct phy_device *phydev) +{ + struct device *dev = &phydev->mdio.dev; + struct mv2222_data *priv = NULL; + + __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, }; + + linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_TP_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, supported); + + linkmode_copy(phydev->supported, supported); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->line_interface = PHY_INTERFACE_MODE_NA; + phydev->priv = priv; + + return phy_sfp_probe(phydev, &sfp_phy_ops); +} + +static struct phy_driver mv2222_drivers[] = { + { + .phy_id = MARVELL_PHY_ID_88X2222, + .phy_id_mask = MARVELL_PHY_ID_MASK, + .name = "Marvell 88X2222", + .get_features = mv2222_get_features, + .soft_reset = mv2222_soft_reset, + .config_init = mv2222_config_init, + .config_aneg = mv2222_config_aneg, + .aneg_done = mv2222_aneg_done, + .probe = mv2222_probe, + .suspend = mv2222_suspend, + .resume = mv2222_resume, + .read_status = mv2222_read_status, + }, +}; +module_phy_driver(mv2222_drivers); + +static struct mdio_device_id __maybe_unused mv2222_tbl[] = { + { MARVELL_PHY_ID_88X2222, MARVELL_PHY_ID_MASK }, + { } +}; +MODULE_DEVICE_TABLE(mdio, mv2222_tbl); + +MODULE_DESCRIPTION("Marvell 88x2222 ethernet transceiver driver"); +MODULE_LICENSE("GPL"); |