--- /dev/null
+/*
+ * Marvell 10G 88x3310 PHY driver
+ *
+ * Based upon the ID registers, this PHY appears to be a mixture of IPs
+ * from two different companies.
+ *
+ * There appears to be several different data paths through the PHY which
+ * are automatically managed by the PHY. The following has been determined
+ * via observation and experimentation:
+ *
+ * SGMII PHYXS -- BASE-T PCS -- 10G PMA -- AN -- Copper (for <= 1G)
+ * 10GBASE-KR PHYXS -- BASE-T PCS -- 10G PMA -- AN -- Copper (for 10G)
+ * 10GBASE-KR PHYXS -- BASE-R PCS -- Fiber
+ *
+ * If both the fiber and copper ports are connected, the first to gain
+ * link takes priority and the other port is completely locked out.
+ */
+#include <linux/phy.h>
+
+enum {
+ MV_PCS_BASE_T = 0x0000,
+ MV_PCS_BASE_R = 0x1000,
+ MV_PCS_1000BASEX = 0x2000,
+
+ /* These registers appear at 0x800X and 0xa00X - the 0xa00X control
+ * registers appear to set themselves to the 0x800X when AN is
+ * restarted, but status registers appear readable from either.
+ */
+ MV_AN_CTRL1000 = 0x8000, /* 1000base-T control register */
+ MV_AN_STAT1000 = 0x8001, /* 1000base-T status register */
+
+ /* This register appears to reflect the copper status */
+ MV_AN_RESULT = 0xa016,
+ MV_AN_RESULT_SPD_10 = BIT(12),
+ MV_AN_RESULT_SPD_100 = BIT(13),
+ MV_AN_RESULT_SPD_1000 = BIT(14),
+ MV_AN_RESULT_SPD_10000 = BIT(15),
+};
+
+static int mv3310_modify(struct phy_device *phydev, int devad, u16 reg,
+ u16 mask, u16 bits)
+{
+ int old, val, ret;
+
+ old = phy_read_mmd(phydev, devad, reg);
+ if (old < 0)
+ return old;
+
+ val = (old & ~mask) | (bits & mask);
+ if (val == old)
+ return 0;
+
+ ret = phy_write_mmd(phydev, devad, reg, val);
+
+ return ret < 0 ? ret : 1;
+}
+
+static int mv3310_probe(struct phy_device *phydev)
+{
+ u32 mmd_mask = MDIO_DEVS_PMAPMD | MDIO_DEVS_AN;
+
+ if (!phydev->is_c45 ||
+ (phydev->c45_ids.devices_in_package & mmd_mask) != mmd_mask)
+ return -ENODEV;
+
+ return 0;
+}
+
+/*
+ * Resetting the MV88X3310 causes it to become non-responsive. Avoid
+ * setting the reset bit(s).
+ */
+static int mv3310_soft_reset(struct phy_device *phydev)
+{
+ return 0;
+}
+
+static int mv3310_config_init(struct phy_device *phydev)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
+ u32 mask;
+ int val;
+
+ /* Check that the PHY interface type is compatible */
+ if (phydev->interface != PHY_INTERFACE_MODE_SGMII &&
+ phydev->interface != PHY_INTERFACE_MODE_XGMII &&
+ phydev->interface != PHY_INTERFACE_MODE_XAUI &&
+ phydev->interface != PHY_INTERFACE_MODE_RXAUI &&
+ phydev->interface != PHY_INTERFACE_MODE_10GKR)
+ return -ENODEV;
+
+ __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, supported);
+ __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, supported);
+
+ if (phydev->c45_ids.devices_in_package & MDIO_DEVS_AN) {
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
+ if (val < 0)
+ return val;
+
+ if (val & MDIO_AN_STAT1_ABLE)
+ __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, supported);
+ }
+
+ val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT2);
+ if (val < 0)
+ return val;
+
+ /* Ethtool does not support the WAN mode bits */
+ if (val & (MDIO_PMA_STAT2_10GBSR | MDIO_PMA_STAT2_10GBLR |
+ MDIO_PMA_STAT2_10GBER | MDIO_PMA_STAT2_10GBLX4 |
+ MDIO_PMA_STAT2_10GBSW | MDIO_PMA_STAT2_10GBLW |
+ MDIO_PMA_STAT2_10GBEW))
+ __set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, supported);
+ if (val & MDIO_PMA_STAT2_10GBSR)
+ __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, supported);
+ if (val & MDIO_PMA_STAT2_10GBLR)
+ __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, supported);
+ if (val & MDIO_PMA_STAT2_10GBER)
+ __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, supported);
+
+ if (val & MDIO_PMA_STAT2_EXTABLE) {
+ val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_EXTABLE);
+ if (val < 0)
+ return val;
+
+ if (val & (MDIO_PMA_EXTABLE_10GBT | MDIO_PMA_EXTABLE_1000BT |
+ MDIO_PMA_EXTABLE_100BTX | MDIO_PMA_EXTABLE_10BT))
+ __set_bit(ETHTOOL_LINK_MODE_TP_BIT, supported);
+ if (val & MDIO_PMA_EXTABLE_10GBLRM)
+ __set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, supported);
+ if (val & (MDIO_PMA_EXTABLE_10GBKX4 | MDIO_PMA_EXTABLE_10GBKR |
+ MDIO_PMA_EXTABLE_1000BKX))
+ __set_bit(ETHTOOL_LINK_MODE_Backplane_BIT, supported);
+ if (val & MDIO_PMA_EXTABLE_10GBLRM)
+ __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT,
+ supported);
+ if (val & MDIO_PMA_EXTABLE_10GBT)
+ __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+ supported);
+ if (val & MDIO_PMA_EXTABLE_10GBKX4)
+ __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
+ supported);
+ if (val & MDIO_PMA_EXTABLE_10GBKR)
+ __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+ supported);
+ if (val & MDIO_PMA_EXTABLE_1000BT)
+ __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+ supported);
+ if (val & MDIO_PMA_EXTABLE_1000BKX)
+ __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
+ supported);
+ if (val & MDIO_PMA_EXTABLE_100BTX)
+ __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+ supported);
+ if (val & MDIO_PMA_EXTABLE_10BT)
+ __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
+ supported);
+ }
+
+ if (!ethtool_convert_link_mode_to_legacy_u32(&mask, supported))
+ dev_warn(&phydev->mdio.dev,
+ "PHY supports (%*pb) more modes than phylib supports, some modes not supported.\n",
+ __ETHTOOL_LINK_MODE_MASK_NBITS, supported);
+
+ phydev->supported &= mask;
+ phydev->advertising &= phydev->supported;
+
+ return 0;
+}
+
+static int mv3310_config_aneg(struct phy_device *phydev)
+{
+ bool changed = false;
+ u32 advertising;
+ int ret;
+
+ if (phydev->autoneg == AUTONEG_DISABLE) {
+ ret = genphy_c45_pma_setup_forced(phydev);
+ if (ret < 0)
+ return ret;
+
+ return genphy_c45_an_disable_aneg(phydev);
+ }
+
+ phydev->advertising &= phydev->supported;
+ advertising = phydev->advertising;
+
+ ret = mv3310_modify(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE,
+ ADVERTISE_ALL | ADVERTISE_100BASE4 |
+ ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
+ ethtool_adv_to_mii_adv_t(advertising));
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ changed = true;
+
+ ret = mv3310_modify(phydev, MDIO_MMD_AN, MV_AN_CTRL1000,
+ ADVERTISE_1000FULL | ADVERTISE_1000HALF,
+ ethtool_adv_to_mii_ctrl1000_t(advertising));
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ changed = true;
+
+ /* 10G control register */
+ ret = mv3310_modify(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
+ MDIO_AN_10GBT_CTRL_ADV10G,
+ advertising & ADVERTISED_10000baseT_Full ?
+ MDIO_AN_10GBT_CTRL_ADV10G : 0);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ changed = true;
+
+ if (changed)
+ ret = genphy_c45_restart_aneg(phydev);
+
+ return ret;
+}
+
+static int mv3310_aneg_done(struct phy_device *phydev)
+{
+ int val;
+
+ val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_R + MDIO_STAT1);
+ if (val < 0)
+ return val;
+
+ if (val & MDIO_STAT1_LSTATUS)
+ return 1;
+
+ return genphy_c45_aneg_done(phydev);
+}
+
+/* 10GBASE-ER,LR,LRM,SR do not support autonegotiation. */
+static int mv3310_read_10gbr_status(struct phy_device *phydev)
+{
+ phydev->link = 1;
+ phydev->speed = SPEED_10000;
+ phydev->duplex = DUPLEX_FULL;
+
+ if (phydev->interface == PHY_INTERFACE_MODE_SGMII)
+ phydev->interface = PHY_INTERFACE_MODE_10GKR;
+
+ return 0;
+}
+
+static int mv3310_read_status(struct phy_device *phydev)
+{
+ u32 mmd_mask = phydev->c45_ids.devices_in_package;
+ int val;
+
+ /* The vendor devads do not report link status. Avoid the PHYXS
+ * instance as there are three, and its status depends on the MAC
+ * being appropriately configured for the negotiated speed.
+ */
+ mmd_mask &= ~(BIT(MDIO_MMD_VEND1) | BIT(MDIO_MMD_VEND2) |
+ BIT(MDIO_MMD_PHYXS));
+
+ phydev->speed = SPEED_UNKNOWN;
+ phydev->duplex = DUPLEX_UNKNOWN;
+ phydev->lp_advertising = 0;
+ phydev->link = 0;
+ phydev->pause = 0;
+ phydev->asym_pause = 0;
+
+ val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_R + MDIO_STAT1);
+ if (val < 0)
+ return val;
+
+ if (val & MDIO_STAT1_LSTATUS)
+ return mv3310_read_10gbr_status(phydev);
+
+ val = genphy_c45_read_link(phydev, mmd_mask);
+ if (val < 0)
+ return val;
+
+ phydev->link = val > 0 ? 1 : 0;
+
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
+ if (val < 0)
+ return val;
+
+ if (val & MDIO_AN_STAT1_COMPLETE) {
+ val = genphy_c45_read_lpa(phydev);
+ if (val < 0)
+ return val;
+
+ /* Read the link partner's 1G advertisment */
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MV_AN_STAT1000);
+ if (val < 0)
+ return val;
+
+ phydev->lp_advertising |= mii_stat1000_to_ethtool_lpa_t(val);
+
+ if (phydev->autoneg == AUTONEG_ENABLE) {
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, MV_AN_RESULT);
+ if (val < 0)
+ return val;
+
+ if (val & MV_AN_RESULT_SPD_10000)
+ phydev->speed = SPEED_10000;
+ else if (val & MV_AN_RESULT_SPD_1000)
+ phydev->speed = SPEED_1000;
+ else if (val & MV_AN_RESULT_SPD_100)
+ phydev->speed = SPEED_100;
+ else if (val & MV_AN_RESULT_SPD_10)
+ phydev->speed = SPEED_10;
+
+ phydev->duplex = DUPLEX_FULL;
+ }
+ }
+
+ if (phydev->autoneg != AUTONEG_ENABLE) {
+ val = genphy_c45_read_pma(phydev);
+ if (val < 0)
+ return val;
+ }
+
+ if ((phydev->interface == PHY_INTERFACE_MODE_SGMII ||
+ phydev->interface == PHY_INTERFACE_MODE_10GKR) && phydev->link) {
+ /* The PHY automatically switches its serdes interface (and
+ * active PHYXS instance) between Cisco SGMII and 10GBase-KR
+ * modes according to the speed. Florian suggests setting
+ * phydev->interface to communicate this to the MAC. Only do
+ * this if we are already in either SGMII or 10GBase-KR mode.
+ */
+ if (phydev->speed == SPEED_10000)
+ phydev->interface = PHY_INTERFACE_MODE_10GKR;
+ else if (phydev->speed >= SPEED_10 &&
+ phydev->speed < SPEED_10000)
+ phydev->interface = PHY_INTERFACE_MODE_SGMII;
+ }
+
+ return 0;
+}
+
+static struct phy_driver mv3310_drivers[] = {
+ {
+ .phy_id = 0x002b09aa,
+ .phy_id_mask = 0xffffffff,
+ .name = "mv88x3310",
+ .features = SUPPORTED_10baseT_Full |
+ SUPPORTED_100baseT_Full |
+ SUPPORTED_1000baseT_Full |
+ SUPPORTED_Autoneg |
+ SUPPORTED_TP |
+ SUPPORTED_FIBRE |
+ SUPPORTED_10000baseT_Full |
+ SUPPORTED_Backplane,
+ .probe = mv3310_probe,
+ .soft_reset = mv3310_soft_reset,
+ .config_init = mv3310_config_init,
+ .config_aneg = mv3310_config_aneg,
+ .aneg_done = mv3310_aneg_done,
+ .read_status = mv3310_read_status,
+ },
+};
+
+module_phy_driver(mv3310_drivers);
+
+static struct mdio_device_id __maybe_unused mv3310_tbl[] = {
+ { 0x002b09aa, 0xffffffff },
+ { },
+};
+MODULE_DEVICE_TABLE(mdio, mv3310_tbl);
+MODULE_DESCRIPTION("Marvell Alaska X 10Gigabit Ethernet PHY driver (MV88X3310)");
+MODULE_LICENSE("GPL");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff