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