diff options
Diffstat (limited to 'drivers/net/ethernet/amd/xgbe/xgbe-mdio.c')
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe-mdio.c | 433 |
1 files changed, 433 insertions, 0 deletions
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c new file mode 100644 index 00000000000..ea7a5d6750e --- /dev/null +++ b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c @@ -0,0 +1,433 @@ +/* + * AMD 10Gb Ethernet driver + * + * This file is available to you under your choice of the following two + * licenses: + * + * License 1: GPLv2 + * + * Copyright (c) 2014 Advanced Micro Devices, Inc. + * + * This file is free software; you may copy, redistribute and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or (at + * your option) any later version. + * + * This file is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * This file incorporates work covered by the following copyright and + * permission notice: + * The Synopsys DWC ETHER XGMAC Software Driver and documentation + * (hereinafter "Software") is an unsupported proprietary work of Synopsys, + * Inc. unless otherwise expressly agreed to in writing between Synopsys + * and you. + * + * The Software IS NOT an item of Licensed Software or Licensed Product + * under any End User Software License Agreement or Agreement for Licensed + * Product with Synopsys or any supplement thereto. Permission is hereby + * granted, free of charge, to any person obtaining a copy of this software + * annotated with this license and the Software, to deal in the Software + * without restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is furnished + * to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" + * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + * + * + * License 2: Modified BSD + * + * Copyright (c) 2014 Advanced Micro Devices, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Advanced Micro Devices, Inc. nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file incorporates work covered by the following copyright and + * permission notice: + * The Synopsys DWC ETHER XGMAC Software Driver and documentation + * (hereinafter "Software") is an unsupported proprietary work of Synopsys, + * Inc. unless otherwise expressly agreed to in writing between Synopsys + * and you. + * + * The Software IS NOT an item of Licensed Software or Licensed Product + * under any End User Software License Agreement or Agreement for Licensed + * Product with Synopsys or any supplement thereto. Permission is hereby + * granted, free of charge, to any person obtaining a copy of this software + * annotated with this license and the Software, to deal in the Software + * without restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is furnished + * to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" + * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/module.h> +#include <linux/kmod.h> +#include <linux/spinlock.h> +#include <linux/mdio.h> +#include <linux/phy.h> +#include <linux/of.h> + +#include "xgbe.h" +#include "xgbe-common.h" + + +static int xgbe_mdio_read(struct mii_bus *mii, int prtad, int mmd_reg) +{ + struct xgbe_prv_data *pdata = mii->priv; + struct xgbe_hw_if *hw_if = &pdata->hw_if; + int mmd_data; + + DBGPR_MDIO("-->xgbe_mdio_read: prtad=%#x mmd_reg=%#x\n", + prtad, mmd_reg); + + mmd_data = hw_if->read_mmd_regs(pdata, prtad, mmd_reg); + + DBGPR_MDIO("<--xgbe_mdio_read: mmd_data=%#x\n", mmd_data); + + return mmd_data; +} + +static int xgbe_mdio_write(struct mii_bus *mii, int prtad, int mmd_reg, + u16 mmd_val) +{ + struct xgbe_prv_data *pdata = mii->priv; + struct xgbe_hw_if *hw_if = &pdata->hw_if; + int mmd_data = mmd_val; + + DBGPR_MDIO("-->xgbe_mdio_write: prtad=%#x mmd_reg=%#x mmd_data=%#x\n", + prtad, mmd_reg, mmd_data); + + hw_if->write_mmd_regs(pdata, prtad, mmd_reg, mmd_data); + + DBGPR_MDIO("<--xgbe_mdio_write\n"); + + return 0; +} + +static void xgbe_adjust_link(struct net_device *netdev) +{ + struct xgbe_prv_data *pdata = netdev_priv(netdev); + struct xgbe_hw_if *hw_if = &pdata->hw_if; + struct phy_device *phydev = pdata->phydev; + unsigned long flags; + int new_state = 0; + + if (phydev == NULL) + return; + + DBGPR_MDIO("-->xgbe_adjust_link: address=%d, newlink=%d, curlink=%d\n", + phydev->addr, phydev->link, pdata->phy_link); + + spin_lock_irqsave(&pdata->lock, flags); + + if (phydev->link) { + /* Flow control support */ + if (pdata->pause_autoneg) { + if (phydev->pause || phydev->asym_pause) { + pdata->tx_pause = 1; + pdata->rx_pause = 1; + } else { + pdata->tx_pause = 0; + pdata->rx_pause = 0; + } + } + + if (pdata->tx_pause != pdata->phy_tx_pause) { + hw_if->config_tx_flow_control(pdata); + pdata->phy_tx_pause = pdata->tx_pause; + } + + if (pdata->rx_pause != pdata->phy_rx_pause) { + hw_if->config_rx_flow_control(pdata); + pdata->phy_rx_pause = pdata->rx_pause; + } + + /* Speed support */ + if (phydev->speed != pdata->phy_speed) { + new_state = 1; + + switch (phydev->speed) { + case SPEED_10000: + hw_if->set_xgmii_speed(pdata); + break; + + case SPEED_2500: + hw_if->set_gmii_2500_speed(pdata); + break; + + case SPEED_1000: + hw_if->set_gmii_speed(pdata); + break; + } + pdata->phy_speed = phydev->speed; + } + + if (phydev->link != pdata->phy_link) { + new_state = 1; + pdata->phy_link = 1; + } + } else if (pdata->phy_link) { + new_state = 1; + pdata->phy_link = 0; + pdata->phy_speed = SPEED_UNKNOWN; + } + + if (new_state) + phy_print_status(phydev); + + spin_unlock_irqrestore(&pdata->lock, flags); + + DBGPR_MDIO("<--xgbe_adjust_link\n"); +} + +void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata) +{ + struct device *dev = pdata->dev; + struct phy_device *phydev = pdata->mii->phy_map[XGBE_PRTAD]; + int i; + + dev_alert(dev, "\n************* PHY Reg dump **********************\n"); + + dev_alert(dev, "PCS Control Reg (%#04x) = %#04x\n", MDIO_CTRL1, + XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1)); + dev_alert(dev, "PCS Status Reg (%#04x) = %#04x\n", MDIO_STAT1, + XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1)); + dev_alert(dev, "Phy Id (PHYS ID 1 %#04x)= %#04x\n", MDIO_DEVID1, + XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID1)); + dev_alert(dev, "Phy Id (PHYS ID 2 %#04x)= %#04x\n", MDIO_DEVID2, + XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID2)); + dev_alert(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS1, + XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS1)); + dev_alert(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS2, + XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS2)); + + dev_alert(dev, "Auto-Neg Control Reg (%#04x) = %#04x\n", MDIO_CTRL1, + XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1)); + dev_alert(dev, "Auto-Neg Status Reg (%#04x) = %#04x\n", MDIO_STAT1, + XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_STAT1)); + dev_alert(dev, "Auto-Neg Ad Reg 1 (%#04x) = %#04x\n", + MDIO_AN_ADVERTISE, + XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE)); + dev_alert(dev, "Auto-Neg Ad Reg 2 (%#04x) = %#04x\n", + MDIO_AN_ADVERTISE + 1, + XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1)); + dev_alert(dev, "Auto-Neg Ad Reg 3 (%#04x) = %#04x\n", + MDIO_AN_ADVERTISE + 2, + XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2)); + dev_alert(dev, "Auto-Neg Completion Reg (%#04x) = %#04x\n", + MDIO_AN_COMP_STAT, + XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_COMP_STAT)); + + dev_alert(dev, "MMD Device Mask = %#x\n", + phydev->c45_ids.devices_in_package); + for (i = 0; i < ARRAY_SIZE(phydev->c45_ids.device_ids); i++) + dev_alert(dev, " MMD %d: ID = %#08x\n", i, + phydev->c45_ids.device_ids[i]); + + dev_alert(dev, "\n*************************************************\n"); +} + +int xgbe_mdio_register(struct xgbe_prv_data *pdata) +{ + struct net_device *netdev = pdata->netdev; + struct device_node *phy_node; + struct mii_bus *mii; + struct phy_device *phydev; + int ret = 0; + + DBGPR("-->xgbe_mdio_register\n"); + + /* Retrieve the phy-handle */ + phy_node = of_parse_phandle(pdata->dev->of_node, "phy-handle", 0); + if (!phy_node) { + dev_err(pdata->dev, "unable to parse phy-handle\n"); + return -EINVAL; + } + + /* Register with the MDIO bus */ + mii = mdiobus_alloc(); + if (mii == NULL) { + dev_err(pdata->dev, "mdiobus_alloc failed\n"); + ret = -ENOMEM; + goto err_node_get; + } + + /* Register on the MDIO bus (don't probe any PHYs) */ + mii->name = XGBE_PHY_NAME; + mii->read = xgbe_mdio_read; + mii->write = xgbe_mdio_write; + snprintf(mii->id, sizeof(mii->id), "%s", pdata->mii_bus_id); + mii->priv = pdata; + mii->phy_mask = ~0; + mii->parent = pdata->dev; + ret = mdiobus_register(mii); + if (ret) { + dev_err(pdata->dev, "mdiobus_register failed\n"); + goto err_mdiobus_alloc; + } + DBGPR(" mdiobus_register succeeded for %s\n", pdata->mii_bus_id); + + /* Probe the PCS using Clause 45 */ + phydev = get_phy_device(mii, XGBE_PRTAD, true); + if (IS_ERR(phydev) || !phydev || + !phydev->c45_ids.device_ids[MDIO_MMD_PCS]) { + dev_err(pdata->dev, "get_phy_device failed\n"); + ret = phydev ? PTR_ERR(phydev) : -ENOLINK; + goto err_mdiobus_register; + } + request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, + MDIO_ID_ARGS(phydev->c45_ids.device_ids[MDIO_MMD_PCS])); + + of_node_get(phy_node); + phydev->dev.of_node = phy_node; + ret = phy_device_register(phydev); + if (ret) { + dev_err(pdata->dev, "phy_device_register failed\n"); + of_node_put(phy_node); + goto err_phy_device; + } + + /* Add a reference to the PHY driver so it can't be unloaded */ + pdata->phy_module = phydev->dev.driver ? + phydev->dev.driver->owner : NULL; + if (!try_module_get(pdata->phy_module)) { + dev_err(pdata->dev, "try_module_get failed\n"); + ret = -EIO; + goto err_phy_device; + } + + pdata->mii = mii; + pdata->mdio_mmd = MDIO_MMD_PCS; + + pdata->phy_link = -1; + pdata->phy_speed = SPEED_UNKNOWN; + pdata->phy_tx_pause = pdata->tx_pause; + pdata->phy_rx_pause = pdata->rx_pause; + + ret = phy_connect_direct(netdev, phydev, &xgbe_adjust_link, + pdata->phy_mode); + if (ret) { + netdev_err(netdev, "phy_connect_direct failed\n"); + goto err_phy_device; + } + + if (!phydev->drv || (phydev->drv->phy_id == 0)) { + netdev_err(netdev, "phy_id not valid\n"); + ret = -ENODEV; + goto err_phy_connect; + } + DBGPR(" phy_connect_direct succeeded for PHY %s, link=%d\n", + dev_name(&phydev->dev), phydev->link); + + phydev->autoneg = pdata->default_autoneg; + if (phydev->autoneg == AUTONEG_DISABLE) { + /* Add settings needed to force speed */ + phydev->supported |= SUPPORTED_1000baseT_Full; + phydev->supported |= SUPPORTED_10000baseT_Full; + + phydev->speed = pdata->default_speed; + phydev->duplex = DUPLEX_FULL; + + phydev->advertising &= ~ADVERTISED_Autoneg; + } + + pdata->phydev = phydev; + + of_node_put(phy_node); + + DBGPHY_REGS(pdata); + + DBGPR("<--xgbe_mdio_register\n"); + + return 0; + +err_phy_connect: + phy_disconnect(phydev); + +err_phy_device: + phy_device_free(phydev); + +err_mdiobus_register: + mdiobus_unregister(mii); + +err_mdiobus_alloc: + mdiobus_free(mii); + +err_node_get: + of_node_put(phy_node); + + return ret; +} + +void xgbe_mdio_unregister(struct xgbe_prv_data *pdata) +{ + DBGPR("-->xgbe_mdio_unregister\n"); + + phy_disconnect(pdata->phydev); + pdata->phydev = NULL; + + module_put(pdata->phy_module); + pdata->phy_module = NULL; + + mdiobus_unregister(pdata->mii); + pdata->mii->priv = NULL; + + mdiobus_free(pdata->mii); + pdata->mii = NULL; + + DBGPR("<--xgbe_mdio_unregister\n"); +} |