[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / amd / xgbe / xgbe-mdio.c

/*
 * 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/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;
}

void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata)
{
	struct device *dev = pdata->dev;
	struct phy_device *phydev = pdata->phydev;
	int i;

	dev_dbg(dev, "\n************* PHY Reg dump **********************\n");

	dev_dbg(dev, "PCS Control Reg (%#04x) = %#04x\n", MDIO_CTRL1,
		XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1));
	dev_dbg(dev, "PCS Status Reg (%#04x) = %#04x\n", MDIO_STAT1,
		XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1));
	dev_dbg(dev, "Phy Id (PHYS ID 1 %#04x)= %#04x\n", MDIO_DEVID1,
		XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID1));
	dev_dbg(dev, "Phy Id (PHYS ID 2 %#04x)= %#04x\n", MDIO_DEVID2,
		XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID2));
	dev_dbg(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS1,
		XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS1));
	dev_dbg(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS2,
		XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS2));

	dev_dbg(dev, "Auto-Neg Control Reg (%#04x) = %#04x\n", MDIO_CTRL1,
		XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1));
	dev_dbg(dev, "Auto-Neg Status Reg (%#04x) = %#04x\n", MDIO_STAT1,
		XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_STAT1));
	dev_dbg(dev, "Auto-Neg Ad Reg 1 (%#04x) = %#04x\n",
		MDIO_AN_ADVERTISE,
		XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE));
	dev_dbg(dev, "Auto-Neg Ad Reg 2 (%#04x) = %#04x\n",
		MDIO_AN_ADVERTISE + 1,
		XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1));
	dev_dbg(dev, "Auto-Neg Ad Reg 3 (%#04x) = %#04x\n",
		MDIO_AN_ADVERTISE + 2,
		XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2));
	dev_dbg(dev, "Auto-Neg Completion Reg (%#04x) = %#04x\n",
		MDIO_AN_COMP_STAT,
		XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_COMP_STAT));

	dev_dbg(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_dbg(dev, "  MMD %d: ID = %#08x\n", i,
			phydev->c45_ids.device_ids[i]);

	dev_dbg(dev, "\n*************************************************\n");
}

int xgbe_mdio_register(struct xgbe_prv_data *pdata)
{
	struct mii_bus *mii;
	struct phy_device *phydev;
	int ret = 0;

	DBGPR("-->xgbe_mdio_register\n");

	mii = mdiobus_alloc();
	if (!mii) {
		dev_err(pdata->dev, "mdiobus_alloc failed\n");
		return -ENOMEM;
	}

	/* 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;
	}
	if (netif_msg_drv(pdata))
		dev_dbg(pdata->dev, "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]));

	ret = phy_device_register(phydev);
	if (ret) {
		dev_err(pdata->dev, "phy_device_register failed\n");
		goto err_phy_device;
	}
	if (!phydev->dev.driver) {
		dev_err(pdata->dev, "phy driver probe failed\n");
		ret = -EIO;
		goto err_phy_device;
	}

	/* Add a reference to the PHY driver so it can't be unloaded */
	pdata->phy_module = phydev->dev.driver->owner;
	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;

	phydev->autoneg = pdata->default_autoneg;
	if (phydev->autoneg == AUTONEG_DISABLE) {
		phydev->speed = pdata->default_speed;
		phydev->duplex = DUPLEX_FULL;

		phydev->advertising &= ~ADVERTISED_Autoneg;
	}

	pdata->phydev = phydev;

	if (netif_msg_drv(pdata))
		xgbe_dump_phy_registers(pdata);

	DBGPR("<--xgbe_mdio_register\n");

	return 0;

err_phy_device:
	phy_device_free(phydev);

err_mdiobus_register:
	mdiobus_unregister(mii);

err_mdiobus_alloc:
	mdiobus_free(mii);

	return ret;
}

void xgbe_mdio_unregister(struct xgbe_prv_data *pdata)
{
	DBGPR("-->xgbe_mdio_unregister\n");

	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");
}
Commit	Line	Data
c5aa9e3b LT	1	/*
	2	* AMD 10Gb Ethernet driver
	3	*
	4	* This file is available to you under your choice of the following two
	5	* licenses:
	6	*
	7	* License 1: GPLv2
	8	*
	9	* Copyright (c) 2014 Advanced Micro Devices, Inc.
	10	*
	11	* This file is free software; you may copy, redistribute and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation, either version 2 of the License, or (at
	14	* your option) any later version.
	15	*
	16	* This file is distributed in the hope that it will be useful, but
	17	* WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	19	* General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	23	*
	24	* This file incorporates work covered by the following copyright and
	25	* permission notice:
	26	* The Synopsys DWC ETHER XGMAC Software Driver and documentation
	27	* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
	28	* Inc. unless otherwise expressly agreed to in writing between Synopsys
	29	* and you.
	30	*
	31	* The Software IS NOT an item of Licensed Software or Licensed Product
	32	* under any End User Software License Agreement or Agreement for Licensed
	33	* Product with Synopsys or any supplement thereto. Permission is hereby
	34	* granted, free of charge, to any person obtaining a copy of this software
	35	* annotated with this license and the Software, to deal in the Software
	36	* without restriction, including without limitation the rights to use,
	37	* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
	38	* of the Software, and to permit persons to whom the Software is furnished
	39	* to do so, subject to the following conditions:
	40	*
	41	* The above copyright notice and this permission notice shall be included
	42	* in all copies or substantial portions of the Software.
	43	*
	44	* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
	45	* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
	46	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
	47	* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
	48	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	49	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	50	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	51	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	52	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	53	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	54	* THE POSSIBILITY OF SUCH DAMAGE.
	55	*
	56	*
	57	* License 2: Modified BSD
	58	*
	59	* Copyright (c) 2014 Advanced Micro Devices, Inc.
	60	* All rights reserved.
	61	*
	62	* Redistribution and use in source and binary forms, with or without
	63	* modification, are permitted provided that the following conditions are met:
	64	* * Redistributions of source code must retain the above copyright
65	* notice, this list of conditions and the following disclaimer.
66	* * Redistributions in binary form must reproduce the above copyright
67	* notice, this list of conditions and the following disclaimer in the
68	* documentation and/or other materials provided with the distribution.
69	* * Neither the name of Advanced Micro Devices, Inc. nor the
70	* names of its contributors may be used to endorse or promote products
71	* derived from this software without specific prior written permission.
72	*
73	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
74	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
75	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
76	* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
77	* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
78	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
79	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
80	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
81	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
82	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
83	*
84	* This file incorporates work covered by the following copyright and
85	* permission notice:
86	* The Synopsys DWC ETHER XGMAC Software Driver and documentation
87	* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
88	* Inc. unless otherwise expressly agreed to in writing between Synopsys
89	* and you.
90	*
91	* The Software IS NOT an item of Licensed Software or Licensed Product
92	* under any End User Software License Agreement or Agreement for Licensed
93	* Product with Synopsys or any supplement thereto. Permission is hereby
94	* granted, free of charge, to any person obtaining a copy of this software
95	* annotated with this license and the Software, to deal in the Software
96	* without restriction, including without limitation the rights to use,
97	* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
98	* of the Software, and to permit persons to whom the Software is furnished
99	* to do so, subject to the following conditions:
100	*
101	* The above copyright notice and this permission notice shall be included
102	* in all copies or substantial portions of the Software.
103	*
104	* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
105	* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
106	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
107	* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
108	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
109	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
110	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
111	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
112	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
113	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
114	* THE POSSIBILITY OF SUCH DAMAGE.
115	*/
116
117	#include <linux/module.h>
118	#include <linux/kmod.h>
c5aa9e3b LT	119	#include <linux/mdio.h>
	120	#include <linux/phy.h>
	121	#include <linux/of.h>
	122
	123	#include "xgbe.h"
	124	#include "xgbe-common.h"
	125
c5aa9e3b LT	126	static int xgbe_mdio_read(struct mii_bus *mii, int prtad, int mmd_reg)
	127	{
	128	struct xgbe_prv_data *pdata = mii->priv;
	129	struct xgbe_hw_if *hw_if = &pdata->hw_if;
	130	int mmd_data;
	131
	132	DBGPR_MDIO("-->xgbe_mdio_read: prtad=%#x mmd_reg=%#x\n",
	133	prtad, mmd_reg);
	134
	135	mmd_data = hw_if->read_mmd_regs(pdata, prtad, mmd_reg);
	136
	137	DBGPR_MDIO("<--xgbe_mdio_read: mmd_data=%#x\n", mmd_data);
	138
	139	return mmd_data;
	140	}
	141
	142	static int xgbe_mdio_write(struct mii_bus *mii, int prtad, int mmd_reg,
	143	u16 mmd_val)
	144	{
	145	struct xgbe_prv_data *pdata = mii->priv;
	146	struct xgbe_hw_if *hw_if = &pdata->hw_if;
	147	int mmd_data = mmd_val;
	148
	149	DBGPR_MDIO("-->xgbe_mdio_write: prtad=%#x mmd_reg=%#x mmd_data=%#x\n",
	150	prtad, mmd_reg, mmd_data);
	151
	152	hw_if->write_mmd_regs(pdata, prtad, mmd_reg, mmd_data);
	153
	154	DBGPR_MDIO("<--xgbe_mdio_write\n");
	155
	156	return 0;
	157	}
	158
c5aa9e3b LT	159	void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata)
	160	{
	161	struct device *dev = pdata->dev;
34bf65df	162	struct phy_device *phydev = pdata->phydev;
c5aa9e3b LT	163	int i;
c5aa9e3b LT	164
34bf65df LT	165	dev_dbg(dev, "\n*********** PHY Reg dump ********************\n");
	166
	167	dev_dbg(dev, "PCS Control Reg (%#04x) = %#04x\n", MDIO_CTRL1,
	168	XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1));
	169	dev_dbg(dev, "PCS Status Reg (%#04x) = %#04x\n", MDIO_STAT1,
	170	XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1));
	171	dev_dbg(dev, "Phy Id (PHYS ID 1 %#04x)= %#04x\n", MDIO_DEVID1,
	172	XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID1));
	173	dev_dbg(dev, "Phy Id (PHYS ID 2 %#04x)= %#04x\n", MDIO_DEVID2,
	174	XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID2));
	175	dev_dbg(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS1,
	176	XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS1));
	177	dev_dbg(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS2,
	178	XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS2));
	179
	180	dev_dbg(dev, "Auto-Neg Control Reg (%#04x) = %#04x\n", MDIO_CTRL1,
	181	XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1));
	182	dev_dbg(dev, "Auto-Neg Status Reg (%#04x) = %#04x\n", MDIO_STAT1,
	183	XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_STAT1));
	184	dev_dbg(dev, "Auto-Neg Ad Reg 1 (%#04x) = %#04x\n",
	185	MDIO_AN_ADVERTISE,
	186	XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE));
	187	dev_dbg(dev, "Auto-Neg Ad Reg 2 (%#04x) = %#04x\n",
	188	MDIO_AN_ADVERTISE + 1,
	189	XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1));
	190	dev_dbg(dev, "Auto-Neg Ad Reg 3 (%#04x) = %#04x\n",
	191	MDIO_AN_ADVERTISE + 2,
	192	XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2));
	193	dev_dbg(dev, "Auto-Neg Completion Reg (%#04x) = %#04x\n",
	194	MDIO_AN_COMP_STAT,
	195	XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_COMP_STAT));
	196
	197	dev_dbg(dev, "MMD Device Mask = %#x\n",
	198	phydev->c45_ids.devices_in_package);
c5aa9e3b	199	for (i = 0; i < ARRAY_SIZE(phydev->c45_ids.device_ids); i++)
34bf65df LT	200	dev_dbg(dev, " MMD %d: ID = %#08x\n", i,
34bf65df LT	201	phydev->c45_ids.device_ids[i]);
c5aa9e3b	202
34bf65df	203	dev_dbg(dev, "\n*************************************************\n");
c5aa9e3b LT	204	}
	205
	206	int xgbe_mdio_register(struct xgbe_prv_data *pdata)
	207	{
c5aa9e3b LT	208	struct mii_bus *mii;
	209	struct phy_device *phydev;
	210	int ret = 0;
	211
	212	DBGPR("-->xgbe_mdio_register\n");
	213
c5aa9e3b	214	mii = mdiobus_alloc();
1d67d7f6	215	if (!mii) {
c5aa9e3b	216	dev_err(pdata->dev, "mdiobus_alloc failed\n");
82a19035	217	return -ENOMEM;
c5aa9e3b LT	218	}
	219
	220	/* Register on the MDIO bus (don't probe any PHYs) */
	221	mii->name = XGBE_PHY_NAME;
	222	mii->read = xgbe_mdio_read;
	223	mii->write = xgbe_mdio_write;
	224	snprintf(mii->id, sizeof(mii->id), "%s", pdata->mii_bus_id);
	225	mii->priv = pdata;
	226	mii->phy_mask = ~0;
	227	mii->parent = pdata->dev;
	228	ret = mdiobus_register(mii);
	229	if (ret) {
	230	dev_err(pdata->dev, "mdiobus_register failed\n");
	231	goto err_mdiobus_alloc;
	232	}
34bf65df LT	233	if (netif_msg_drv(pdata))
	234	dev_dbg(pdata->dev, "mdiobus_register succeeded for %s\n",
	235	pdata->mii_bus_id);
c5aa9e3b LT	236
	237	/* Probe the PCS using Clause 45 */
	238	phydev = get_phy_device(mii, XGBE_PRTAD, true);
	239	if (IS_ERR(phydev) \|\| !phydev \|\|
	240	!phydev->c45_ids.device_ids[MDIO_MMD_PCS]) {
	241	dev_err(pdata->dev, "get_phy_device failed\n");
	242	ret = phydev ? PTR_ERR(phydev) : -ENOLINK;
	243	goto err_mdiobus_register;
	244	}
	245	request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
	246	MDIO_ID_ARGS(phydev->c45_ids.device_ids[MDIO_MMD_PCS]));
	247
c5aa9e3b LT	248	ret = phy_device_register(phydev);
	249	if (ret) {
	250	dev_err(pdata->dev, "phy_device_register failed\n");
c5aa9e3b LT	251	goto err_phy_device;
c5aa9e3b LT	252	}
94c043e5 LT	253	if (!phydev->dev.driver) {
	254	dev_err(pdata->dev, "phy driver probe failed\n");
	255	ret = -EIO;
	256	goto err_phy_device;
	257	}
c5aa9e3b LT	258
c5aa9e3b LT	259	/* Add a reference to the PHY driver so it can't be unloaded */
94c043e5	260	pdata->phy_module = phydev->dev.driver->owner;
c5aa9e3b LT	261	if (!try_module_get(pdata->phy_module)) {
	262	dev_err(pdata->dev, "try_module_get failed\n");
	263	ret = -EIO;
	264	goto err_phy_device;
	265	}
	266
	267	pdata->mii = mii;
	268	pdata->mdio_mmd = MDIO_MMD_PCS;
	269
c5aa9e3b LT	270	phydev->autoneg = pdata->default_autoneg;
c5aa9e3b LT	271	if (phydev->autoneg == AUTONEG_DISABLE) {
c5aa9e3b LT	272	phydev->speed = pdata->default_speed;
	273	phydev->duplex = DUPLEX_FULL;
	274
	275	phydev->advertising &= ~ADVERTISED_Autoneg;
	276	}
	277
	278	pdata->phydev = phydev;
	279
34bf65df LT	280	if (netif_msg_drv(pdata))
34bf65df LT	281	xgbe_dump_phy_registers(pdata);
c5aa9e3b LT	282
	283	DBGPR("<--xgbe_mdio_register\n");
	284
	285	return 0;
	286
c5aa9e3b LT	287	err_phy_device:
	288	phy_device_free(phydev);
	289
	290	err_mdiobus_register:
	291	mdiobus_unregister(mii);
	292
	293	err_mdiobus_alloc:
	294	mdiobus_free(mii);
	295
c5aa9e3b LT	296	return ret;
	297	}
	298
	299	void xgbe_mdio_unregister(struct xgbe_prv_data *pdata)
	300	{
	301	DBGPR("-->xgbe_mdio_unregister\n");
	302
c5aa9e3b LT	303	pdata->phydev = NULL;
	304
	305	module_put(pdata->phy_module);
	306	pdata->phy_module = NULL;
	307
	308	mdiobus_unregister(pdata->mii);
	309	pdata->mii->priv = NULL;
	310
	311	mdiobus_free(pdata->mii);
	312	pdata->mii = NULL;
	313
	314	DBGPR("<--xgbe_mdio_unregister\n");
	315	}