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linuxdebug/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c

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null pointer error
2024-07-16 15:50:57 +02:00
/*
* AMD 10Gb Ethernet driver
*
* This file is available to you under your choice of the following two
* licenses:
*
* License 1: GPLv2
*
* Copyright (c) 2014-2016 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) 2014-2016 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/interrupt.h>
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/mdio.h>
#include <linux/phy.h>
#include <linux/of.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>
#include "xgbe.h"
#include "xgbe-common.h"
static int xgbe_phy_module_eeprom(struct xgbe_prv_data *pdata,
struct ethtool_eeprom *eeprom, u8 *data)
{
if (!pdata->phy_if.phy_impl.module_eeprom)
return -ENXIO;
return pdata->phy_if.phy_impl.module_eeprom(pdata, eeprom, data);
}
static int xgbe_phy_module_info(struct xgbe_prv_data *pdata,
struct ethtool_modinfo *modinfo)
{
if (!pdata->phy_if.phy_impl.module_info)
return -ENXIO;
return pdata->phy_if.phy_impl.module_info(pdata, modinfo);
}
static void xgbe_an37_clear_interrupts(struct xgbe_prv_data *pdata)
{
int reg;
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT);
reg &= ~XGBE_AN_CL37_INT_MASK;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT, reg);
}
static void xgbe_an37_disable_interrupts(struct xgbe_prv_data *pdata)
{
int reg;
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL);
reg &= ~XGBE_AN_CL37_INT_MASK;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg);
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL);
reg &= ~XGBE_PCS_CL37_BP;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL, reg);
}
static void xgbe_an37_enable_interrupts(struct xgbe_prv_data *pdata)
{
int reg;
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL);
reg |= XGBE_PCS_CL37_BP;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL, reg);
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL);
reg |= XGBE_AN_CL37_INT_MASK;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg);
}
static void xgbe_an73_clear_interrupts(struct xgbe_prv_data *pdata)
{
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0);
}
static void xgbe_an73_disable_interrupts(struct xgbe_prv_data *pdata)
{
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, 0);
}
static void xgbe_an73_enable_interrupts(struct xgbe_prv_data *pdata)
{
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, XGBE_AN_CL73_INT_MASK);
}
static void xgbe_an_enable_interrupts(struct xgbe_prv_data *pdata)
{
switch (pdata->an_mode) {
case XGBE_AN_MODE_CL73:
case XGBE_AN_MODE_CL73_REDRV:
xgbe_an73_enable_interrupts(pdata);
break;
case XGBE_AN_MODE_CL37:
case XGBE_AN_MODE_CL37_SGMII:
xgbe_an37_enable_interrupts(pdata);
break;
default:
break;
}
}
static void xgbe_an_clear_interrupts_all(struct xgbe_prv_data *pdata)
{
xgbe_an73_clear_interrupts(pdata);
xgbe_an37_clear_interrupts(pdata);
}
static void xgbe_kr_mode(struct xgbe_prv_data *pdata)
{
/* Set MAC to 10G speed */
pdata->hw_if.set_speed(pdata, SPEED_10000);
/* Call PHY implementation support to complete rate change */
pdata->phy_if.phy_impl.set_mode(pdata, XGBE_MODE_KR);
}
static void xgbe_kx_2500_mode(struct xgbe_prv_data *pdata)
{
/* Set MAC to 2.5G speed */
pdata->hw_if.set_speed(pdata, SPEED_2500);
/* Call PHY implementation support to complete rate change */
pdata->phy_if.phy_impl.set_mode(pdata, XGBE_MODE_KX_2500);
}
static void xgbe_kx_1000_mode(struct xgbe_prv_data *pdata)
{
/* Set MAC to 1G speed */
pdata->hw_if.set_speed(pdata, SPEED_1000);
/* Call PHY implementation support to complete rate change */
pdata->phy_if.phy_impl.set_mode(pdata, XGBE_MODE_KX_1000);
}
static void xgbe_sfi_mode(struct xgbe_prv_data *pdata)
{
/* If a KR re-driver is present, change to KR mode instead */
if (pdata->kr_redrv)
return xgbe_kr_mode(pdata);
/* Set MAC to 10G speed */
pdata->hw_if.set_speed(pdata, SPEED_10000);
/* Call PHY implementation support to complete rate change */
pdata->phy_if.phy_impl.set_mode(pdata, XGBE_MODE_SFI);
}
static void xgbe_x_mode(struct xgbe_prv_data *pdata)
{
/* Set MAC to 1G speed */
pdata->hw_if.set_speed(pdata, SPEED_1000);
/* Call PHY implementation support to complete rate change */
pdata->phy_if.phy_impl.set_mode(pdata, XGBE_MODE_X);
}
static void xgbe_sgmii_1000_mode(struct xgbe_prv_data *pdata)
{
/* Set MAC to 1G speed */
pdata->hw_if.set_speed(pdata, SPEED_1000);
/* Call PHY implementation support to complete rate change */
pdata->phy_if.phy_impl.set_mode(pdata, XGBE_MODE_SGMII_1000);
}
static void xgbe_sgmii_100_mode(struct xgbe_prv_data *pdata)
{
/* Set MAC to 1G speed */
pdata->hw_if.set_speed(pdata, SPEED_1000);
/* Call PHY implementation support to complete rate change */
pdata->phy_if.phy_impl.set_mode(pdata, XGBE_MODE_SGMII_100);
}
static enum xgbe_mode xgbe_cur_mode(struct xgbe_prv_data *pdata)
{
return pdata->phy_if.phy_impl.cur_mode(pdata);
}
static bool xgbe_in_kr_mode(struct xgbe_prv_data *pdata)
{
return (xgbe_cur_mode(pdata) == XGBE_MODE_KR);
}
static void xgbe_change_mode(struct xgbe_prv_data *pdata,
enum xgbe_mode mode)
{
switch (mode) {
case XGBE_MODE_KX_1000:
xgbe_kx_1000_mode(pdata);
break;
case XGBE_MODE_KX_2500:
xgbe_kx_2500_mode(pdata);
break;
case XGBE_MODE_KR:
xgbe_kr_mode(pdata);
break;
case XGBE_MODE_SGMII_100:
xgbe_sgmii_100_mode(pdata);
break;
case XGBE_MODE_SGMII_1000:
xgbe_sgmii_1000_mode(pdata);
break;
case XGBE_MODE_X:
xgbe_x_mode(pdata);
break;
case XGBE_MODE_SFI:
xgbe_sfi_mode(pdata);
break;
case XGBE_MODE_UNKNOWN:
break;
default:
netif_dbg(pdata, link, pdata->netdev,
"invalid operation mode requested (%u)\n", mode);
}
}
static void xgbe_switch_mode(struct xgbe_prv_data *pdata)
{
xgbe_change_mode(pdata, pdata->phy_if.phy_impl.switch_mode(pdata));
}
static bool xgbe_set_mode(struct xgbe_prv_data *pdata,
enum xgbe_mode mode)
{
if (mode == xgbe_cur_mode(pdata))
return false;
xgbe_change_mode(pdata, mode);
return true;
}
static bool xgbe_use_mode(struct xgbe_prv_data *pdata,
enum xgbe_mode mode)
{
return pdata->phy_if.phy_impl.use_mode(pdata, mode);
}
static void xgbe_an37_set(struct xgbe_prv_data *pdata, bool enable,
bool restart)
{
unsigned int reg;
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_CTRL1);
reg &= ~MDIO_VEND2_CTRL1_AN_ENABLE;
if (enable)
reg |= MDIO_VEND2_CTRL1_AN_ENABLE;
if (restart)
reg |= MDIO_VEND2_CTRL1_AN_RESTART;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_CTRL1, reg);
}
static void xgbe_an37_restart(struct xgbe_prv_data *pdata)
{
xgbe_an37_enable_interrupts(pdata);
xgbe_an37_set(pdata, true, true);
netif_dbg(pdata, link, pdata->netdev, "CL37 AN enabled/restarted\n");
}
static void xgbe_an37_disable(struct xgbe_prv_data *pdata)
{
xgbe_an37_set(pdata, false, false);
xgbe_an37_disable_interrupts(pdata);
netif_dbg(pdata, link, pdata->netdev, "CL37 AN disabled\n");
}
static void xgbe_an73_set(struct xgbe_prv_data *pdata, bool enable,
bool restart)
{
unsigned int reg;
/* Disable KR training for now */
reg = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
reg &= ~XGBE_KR_TRAINING_ENABLE;
XMDIO_WRITE(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, reg);
/* Update AN settings */
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1);
reg &= ~MDIO_AN_CTRL1_ENABLE;
if (enable)
reg |= MDIO_AN_CTRL1_ENABLE;
if (restart)
reg |= MDIO_AN_CTRL1_RESTART;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_CTRL1, reg);
}
static void xgbe_an73_restart(struct xgbe_prv_data *pdata)
{
xgbe_an73_enable_interrupts(pdata);
xgbe_an73_set(pdata, true, true);
netif_dbg(pdata, link, pdata->netdev, "CL73 AN enabled/restarted\n");
}
static void xgbe_an73_disable(struct xgbe_prv_data *pdata)
{
xgbe_an73_set(pdata, false, false);
xgbe_an73_disable_interrupts(pdata);
pdata->an_start = 0;
netif_dbg(pdata, link, pdata->netdev, "CL73 AN disabled\n");
}
static void xgbe_an_restart(struct xgbe_prv_data *pdata)
{
if (pdata->phy_if.phy_impl.an_pre)
pdata->phy_if.phy_impl.an_pre(pdata);
switch (pdata->an_mode) {
case XGBE_AN_MODE_CL73:
case XGBE_AN_MODE_CL73_REDRV:
xgbe_an73_restart(pdata);
break;
case XGBE_AN_MODE_CL37:
case XGBE_AN_MODE_CL37_SGMII:
xgbe_an37_restart(pdata);
break;
default:
break;
}
}
static void xgbe_an_disable(struct xgbe_prv_data *pdata)
{
if (pdata->phy_if.phy_impl.an_post)
pdata->phy_if.phy_impl.an_post(pdata);
switch (pdata->an_mode) {
case XGBE_AN_MODE_CL73:
case XGBE_AN_MODE_CL73_REDRV:
xgbe_an73_disable(pdata);
break;
case XGBE_AN_MODE_CL37:
case XGBE_AN_MODE_CL37_SGMII:
xgbe_an37_disable(pdata);
break;
default:
break;
}
}
static void xgbe_an_disable_all(struct xgbe_prv_data *pdata)
{
xgbe_an73_disable(pdata);
xgbe_an37_disable(pdata);
}
static enum xgbe_an xgbe_an73_tx_training(struct xgbe_prv_data *pdata,
enum xgbe_rx *state)
{
unsigned int ad_reg, lp_reg, reg;
*state = XGBE_RX_COMPLETE;
/* If we're not in KR mode then we're done */
if (!xgbe_in_kr_mode(pdata))
return XGBE_AN_PAGE_RECEIVED;
/* Enable/Disable FEC */
ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2);
reg = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FECCTRL);
reg &= ~(MDIO_PMA_10GBR_FECABLE_ABLE | MDIO_PMA_10GBR_FECABLE_ERRABLE);
if ((ad_reg & 0xc000) && (lp_reg & 0xc000))
reg |= pdata->fec_ability;
XMDIO_WRITE(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FECCTRL, reg);
/* Start KR training */
if (pdata->phy_if.phy_impl.kr_training_pre)
pdata->phy_if.phy_impl.kr_training_pre(pdata);
reg = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
reg |= XGBE_KR_TRAINING_ENABLE;
reg |= XGBE_KR_TRAINING_START;
XMDIO_WRITE(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, reg);
pdata->kr_start_time = jiffies;
netif_dbg(pdata, link, pdata->netdev,
"KR training initiated\n");
if (pdata->phy_if.phy_impl.kr_training_post)
pdata->phy_if.phy_impl.kr_training_post(pdata);
return XGBE_AN_PAGE_RECEIVED;
}
static enum xgbe_an xgbe_an73_tx_xnp(struct xgbe_prv_data *pdata,
enum xgbe_rx *state)
{
u16 msg;
*state = XGBE_RX_XNP;
msg = XGBE_XNP_MCF_NULL_MESSAGE;
msg |= XGBE_XNP_MP_FORMATTED;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_XNP + 2, 0);
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_XNP + 1, 0);
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_XNP, msg);
return XGBE_AN_PAGE_RECEIVED;
}
static enum xgbe_an xgbe_an73_rx_bpa(struct xgbe_prv_data *pdata,
enum xgbe_rx *state)
{
unsigned int link_support;
unsigned int reg, ad_reg, lp_reg;
/* Read Base Ability register 2 first */
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1);
/* Check for a supported mode, otherwise restart in a different one */
link_support = xgbe_in_kr_mode(pdata) ? 0x80 : 0x20;
if (!(reg & link_support))
return XGBE_AN_INCOMPAT_LINK;
/* Check Extended Next Page support */
ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA);
return ((ad_reg & XGBE_XNP_NP_EXCHANGE) ||
(lp_reg & XGBE_XNP_NP_EXCHANGE))
? xgbe_an73_tx_xnp(pdata, state)
: xgbe_an73_tx_training(pdata, state);
}
static enum xgbe_an xgbe_an73_rx_xnp(struct xgbe_prv_data *pdata,
enum xgbe_rx *state)
{
unsigned int ad_reg, lp_reg;
/* Check Extended Next Page support */
ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_XNP);
lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPX);
return ((ad_reg & XGBE_XNP_NP_EXCHANGE) ||
(lp_reg & XGBE_XNP_NP_EXCHANGE))
? xgbe_an73_tx_xnp(pdata, state)
: xgbe_an73_tx_training(pdata, state);
}
static enum xgbe_an xgbe_an73_page_received(struct xgbe_prv_data *pdata)
{
enum xgbe_rx *state;
unsigned long an_timeout;
enum xgbe_an ret;
if (!pdata->an_start) {
pdata->an_start = jiffies;
} else {
an_timeout = pdata->an_start +
msecs_to_jiffies(XGBE_AN_MS_TIMEOUT);
if (time_after(jiffies, an_timeout)) {
/* Auto-negotiation timed out, reset state */
pdata->kr_state = XGBE_RX_BPA;
pdata->kx_state = XGBE_RX_BPA;
pdata->an_start = jiffies;
netif_dbg(pdata, link, pdata->netdev,
"CL73 AN timed out, resetting state\n");
}
}
state = xgbe_in_kr_mode(pdata) ? &pdata->kr_state
: &pdata->kx_state;
switch (*state) {
case XGBE_RX_BPA:
ret = xgbe_an73_rx_bpa(pdata, state);
break;
case XGBE_RX_XNP:
ret = xgbe_an73_rx_xnp(pdata, state);
break;
default:
ret = XGBE_AN_ERROR;
}
return ret;
}
static enum xgbe_an xgbe_an73_incompat_link(struct xgbe_prv_data *pdata)
{
struct ethtool_link_ksettings *lks = &pdata->phy.lks;
/* Be sure we aren't looping trying to negotiate */
if (xgbe_in_kr_mode(pdata)) {
pdata->kr_state = XGBE_RX_ERROR;
if (!XGBE_ADV(lks, 1000baseKX_Full) &&
!XGBE_ADV(lks, 2500baseX_Full))
return XGBE_AN_NO_LINK;
if (pdata->kx_state != XGBE_RX_BPA)
return XGBE_AN_NO_LINK;
} else {
pdata->kx_state = XGBE_RX_ERROR;
if (!XGBE_ADV(lks, 10000baseKR_Full))
return XGBE_AN_NO_LINK;
if (pdata->kr_state != XGBE_RX_BPA)
return XGBE_AN_NO_LINK;
}
xgbe_an_disable(pdata);
xgbe_switch_mode(pdata);
pdata->an_result = XGBE_AN_READY;
xgbe_an_restart(pdata);
return XGBE_AN_INCOMPAT_LINK;
}
static void xgbe_an37_isr(struct xgbe_prv_data *pdata)
{
unsigned int reg;
/* Disable AN interrupts */
xgbe_an37_disable_interrupts(pdata);
/* Save the interrupt(s) that fired */
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT);
pdata->an_int = reg & XGBE_AN_CL37_INT_MASK;
pdata->an_status = reg & ~XGBE_AN_CL37_INT_MASK;
if (pdata->an_int) {
/* Clear the interrupt(s) that fired and process them */
reg &= ~XGBE_AN_CL37_INT_MASK;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT, reg);
queue_work(pdata->an_workqueue, &pdata->an_irq_work);
} else {
/* Enable AN interrupts */
xgbe_an37_enable_interrupts(pdata);
/* Reissue interrupt if status is not clear */
if (pdata->vdata->irq_reissue_support)
XP_IOWRITE(pdata, XP_INT_REISSUE_EN, 1 << 3);
}
}
static void xgbe_an73_isr(struct xgbe_prv_data *pdata)
{
/* Disable AN interrupts */
xgbe_an73_disable_interrupts(pdata);
/* Save the interrupt(s) that fired */
pdata->an_int = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_INT);
if (pdata->an_int) {
/* Clear the interrupt(s) that fired and process them */
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, ~pdata->an_int);
queue_work(pdata->an_workqueue, &pdata->an_irq_work);
} else {
/* Enable AN interrupts */
xgbe_an73_enable_interrupts(pdata);
/* Reissue interrupt if status is not clear */
if (pdata->vdata->irq_reissue_support)
XP_IOWRITE(pdata, XP_INT_REISSUE_EN, 1 << 3);
}
}
static void xgbe_an_isr_task(struct tasklet_struct *t)
{
struct xgbe_prv_data *pdata = from_tasklet(pdata, t, tasklet_an);
netif_dbg(pdata, intr, pdata->netdev, "AN interrupt received\n");
switch (pdata->an_mode) {
case XGBE_AN_MODE_CL73:
case XGBE_AN_MODE_CL73_REDRV:
xgbe_an73_isr(pdata);
break;
case XGBE_AN_MODE_CL37:
case XGBE_AN_MODE_CL37_SGMII:
xgbe_an37_isr(pdata);
break;
default:
break;
}
}
static irqreturn_t xgbe_an_isr(int irq, void *data)
{
struct xgbe_prv_data *pdata = (struct xgbe_prv_data *)data;
if (pdata->isr_as_tasklet)
tasklet_schedule(&pdata->tasklet_an);
else
xgbe_an_isr_task(&pdata->tasklet_an);
return IRQ_HANDLED;
}
static irqreturn_t xgbe_an_combined_isr(struct xgbe_prv_data *pdata)
{
xgbe_an_isr_task(&pdata->tasklet_an);
return IRQ_HANDLED;
}
static void xgbe_an_irq_work(struct work_struct *work)
{
struct xgbe_prv_data *pdata = container_of(work,
struct xgbe_prv_data,
an_irq_work);
/* Avoid a race between enabling the IRQ and exiting the work by
* waiting for the work to finish and then queueing it
*/
flush_work(&pdata->an_work);
queue_work(pdata->an_workqueue, &pdata->an_work);
}
static const char *xgbe_state_as_string(enum xgbe_an state)
{
switch (state) {
case XGBE_AN_READY:
return "Ready";
case XGBE_AN_PAGE_RECEIVED:
return "Page-Received";
case XGBE_AN_INCOMPAT_LINK:
return "Incompatible-Link";
case XGBE_AN_COMPLETE:
return "Complete";
case XGBE_AN_NO_LINK:
return "No-Link";
case XGBE_AN_ERROR:
return "Error";
default:
return "Undefined";
}
}
static void xgbe_an37_state_machine(struct xgbe_prv_data *pdata)
{
enum xgbe_an cur_state = pdata->an_state;
if (!pdata->an_int)
return;
if (pdata->an_int & XGBE_AN_CL37_INT_CMPLT) {
pdata->an_state = XGBE_AN_COMPLETE;
pdata->an_int &= ~XGBE_AN_CL37_INT_CMPLT;
/* If SGMII is enabled, check the link status */
if ((pdata->an_mode == XGBE_AN_MODE_CL37_SGMII) &&
!(pdata->an_status & XGBE_SGMII_AN_LINK_STATUS))
pdata->an_state = XGBE_AN_NO_LINK;
}
netif_dbg(pdata, link, pdata->netdev, "CL37 AN %s\n",
xgbe_state_as_string(pdata->an_state));
cur_state = pdata->an_state;
switch (pdata->an_state) {
case XGBE_AN_READY:
break;
case XGBE_AN_COMPLETE:
netif_dbg(pdata, link, pdata->netdev,
"Auto negotiation successful\n");
break;
case XGBE_AN_NO_LINK:
break;
default:
pdata->an_state = XGBE_AN_ERROR;
}
if (pdata->an_state == XGBE_AN_ERROR) {
netdev_err(pdata->netdev,
"error during auto-negotiation, state=%u\n",
cur_state);
pdata->an_int = 0;
xgbe_an37_clear_interrupts(pdata);
}
if (pdata->an_state >= XGBE_AN_COMPLETE) {
pdata->an_result = pdata->an_state;
pdata->an_state = XGBE_AN_READY;
if (pdata->phy_if.phy_impl.an_post)
pdata->phy_if.phy_impl.an_post(pdata);
netif_dbg(pdata, link, pdata->netdev, "CL37 AN result: %s\n",
xgbe_state_as_string(pdata->an_result));
}
xgbe_an37_enable_interrupts(pdata);
}
static void xgbe_an73_state_machine(struct xgbe_prv_data *pdata)
{
enum xgbe_an cur_state = pdata->an_state;
if (!pdata->an_int)
return;
next_int:
if (pdata->an_int & XGBE_AN_CL73_PG_RCV) {
pdata->an_state = XGBE_AN_PAGE_RECEIVED;
pdata->an_int &= ~XGBE_AN_CL73_PG_RCV;
} else if (pdata->an_int & XGBE_AN_CL73_INC_LINK) {
pdata->an_state = XGBE_AN_INCOMPAT_LINK;
pdata->an_int &= ~XGBE_AN_CL73_INC_LINK;
} else if (pdata->an_int & XGBE_AN_CL73_INT_CMPLT) {
pdata->an_state = XGBE_AN_COMPLETE;
pdata->an_int &= ~XGBE_AN_CL73_INT_CMPLT;
} else {
pdata->an_state = XGBE_AN_ERROR;
}
again:
netif_dbg(pdata, link, pdata->netdev, "CL73 AN %s\n",
xgbe_state_as_string(pdata->an_state));
cur_state = pdata->an_state;
switch (pdata->an_state) {
case XGBE_AN_READY:
pdata->an_supported = 0;
break;
case XGBE_AN_PAGE_RECEIVED:
pdata->an_state = xgbe_an73_page_received(pdata);
pdata->an_supported++;
break;
case XGBE_AN_INCOMPAT_LINK:
pdata->an_supported = 0;
pdata->parallel_detect = 0;
pdata->an_state = xgbe_an73_incompat_link(pdata);
break;
case XGBE_AN_COMPLETE:
pdata->parallel_detect = pdata->an_supported ? 0 : 1;
netif_dbg(pdata, link, pdata->netdev, "%s successful\n",
pdata->an_supported ? "Auto negotiation"
: "Parallel detection");
break;
case XGBE_AN_NO_LINK:
break;
default:
pdata->an_state = XGBE_AN_ERROR;
}
if (pdata->an_state == XGBE_AN_NO_LINK) {
pdata->an_int = 0;
xgbe_an73_clear_interrupts(pdata);
} else if (pdata->an_state == XGBE_AN_ERROR) {
netdev_err(pdata->netdev,
"error during auto-negotiation, state=%u\n",
cur_state);
pdata->an_int = 0;
xgbe_an73_clear_interrupts(pdata);
}
if (pdata->an_state >= XGBE_AN_COMPLETE) {
pdata->an_result = pdata->an_state;
pdata->an_state = XGBE_AN_READY;
pdata->kr_state = XGBE_RX_BPA;
pdata->kx_state = XGBE_RX_BPA;
pdata->an_start = 0;
if (pdata->phy_if.phy_impl.an_post)
pdata->phy_if.phy_impl.an_post(pdata);
netif_dbg(pdata, link, pdata->netdev, "CL73 AN result: %s\n",
xgbe_state_as_string(pdata->an_result));
}
if (cur_state != pdata->an_state)
goto again;
if (pdata->an_int)
goto next_int;
xgbe_an73_enable_interrupts(pdata);
}
static void xgbe_an_state_machine(struct work_struct *work)
{
struct xgbe_prv_data *pdata = container_of(work,
struct xgbe_prv_data,
an_work);
mutex_lock(&pdata->an_mutex);
switch (pdata->an_mode) {
case XGBE_AN_MODE_CL73:
case XGBE_AN_MODE_CL73_REDRV:
xgbe_an73_state_machine(pdata);
break;
case XGBE_AN_MODE_CL37:
case XGBE_AN_MODE_CL37_SGMII:
xgbe_an37_state_machine(pdata);
break;
default:
break;
}
/* Reissue interrupt if status is not clear */
if (pdata->vdata->irq_reissue_support)
XP_IOWRITE(pdata, XP_INT_REISSUE_EN, 1 << 3);
mutex_unlock(&pdata->an_mutex);
}
static void xgbe_an37_init(struct xgbe_prv_data *pdata)
{
struct ethtool_link_ksettings lks;
unsigned int reg;
pdata->phy_if.phy_impl.an_advertising(pdata, &lks);
/* Set up Advertisement register */
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_ADVERTISE);
if (XGBE_ADV(&lks, Pause))
reg |= 0x100;
else
reg &= ~0x100;
if (XGBE_ADV(&lks, Asym_Pause))
reg |= 0x80;
else
reg &= ~0x80;
/* Full duplex, but not half */
reg |= XGBE_AN_CL37_FD_MASK;
reg &= ~XGBE_AN_CL37_HD_MASK;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_ADVERTISE, reg);
/* Set up the Control register */
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL);
reg &= ~XGBE_AN_CL37_TX_CONFIG_MASK;
reg &= ~XGBE_AN_CL37_PCS_MODE_MASK;
switch (pdata->an_mode) {
case XGBE_AN_MODE_CL37:
reg |= XGBE_AN_CL37_PCS_MODE_BASEX;
break;
case XGBE_AN_MODE_CL37_SGMII:
reg |= XGBE_AN_CL37_PCS_MODE_SGMII;
break;
default:
break;
}
reg |= XGBE_AN_CL37_MII_CTRL_8BIT;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg);
netif_dbg(pdata, link, pdata->netdev, "CL37 AN (%s) initialized\n",
(pdata->an_mode == XGBE_AN_MODE_CL37) ? "BaseX" : "SGMII");
}
static void xgbe_an73_init(struct xgbe_prv_data *pdata)
{
struct ethtool_link_ksettings lks;
unsigned int reg;
pdata->phy_if.phy_impl.an_advertising(pdata, &lks);
/* Set up Advertisement register 3 first */
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
if (XGBE_ADV(&lks, 10000baseR_FEC))
reg |= 0xc000;
else
reg &= ~0xc000;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2, reg);
/* Set up Advertisement register 2 next */
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
if (XGBE_ADV(&lks, 10000baseKR_Full))
reg |= 0x80;
else
reg &= ~0x80;
if (XGBE_ADV(&lks, 1000baseKX_Full) ||
XGBE_ADV(&lks, 2500baseX_Full))
reg |= 0x20;
else
reg &= ~0x20;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1, reg);
/* Set up Advertisement register 1 last */
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
if (XGBE_ADV(&lks, Pause))
reg |= 0x400;
else
reg &= ~0x400;
if (XGBE_ADV(&lks, Asym_Pause))
reg |= 0x800;
else
reg &= ~0x800;
/* We don't intend to perform XNP */
reg &= ~XGBE_XNP_NP_EXCHANGE;
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE, reg);
netif_dbg(pdata, link, pdata->netdev, "CL73 AN initialized\n");
}
static void xgbe_an_init(struct xgbe_prv_data *pdata)
{
/* Set up advertisement registers based on current settings */
pdata->an_mode = pdata->phy_if.phy_impl.an_mode(pdata);
switch (pdata->an_mode) {
case XGBE_AN_MODE_CL73:
case XGBE_AN_MODE_CL73_REDRV:
xgbe_an73_init(pdata);
break;
case XGBE_AN_MODE_CL37:
case XGBE_AN_MODE_CL37_SGMII:
xgbe_an37_init(pdata);
break;
default:
break;
}
}
static const char *xgbe_phy_fc_string(struct xgbe_prv_data *pdata)
{
if (pdata->tx_pause && pdata->rx_pause)
return "rx/tx";
else if (pdata->rx_pause)
return "rx";
else if (pdata->tx_pause)
return "tx";
else
return "off";
}
static const char *xgbe_phy_speed_string(int speed)
{
switch (speed) {
case SPEED_100:
return "100Mbps";
case SPEED_1000:
return "1Gbps";
case SPEED_2500:
return "2.5Gbps";
case SPEED_10000:
return "10Gbps";
case SPEED_UNKNOWN:
return "Unknown";
default:
return "Unsupported";
}
}
static void xgbe_phy_print_status(struct xgbe_prv_data *pdata)
{
if (pdata->phy.link)
netdev_info(pdata->netdev,
"Link is Up - %s/%s - flow control %s\n",
xgbe_phy_speed_string(pdata->phy.speed),
pdata->phy.duplex == DUPLEX_FULL ? "Full" : "Half",
xgbe_phy_fc_string(pdata));
else
netdev_info(pdata->netdev, "Link is Down\n");
}
static void xgbe_phy_adjust_link(struct xgbe_prv_data *pdata)
{
int new_state = 0;
if (pdata->phy.link) {
/* Flow control support */
pdata->pause_autoneg = pdata->phy.pause_autoneg;
if (pdata->tx_pause != pdata->phy.tx_pause) {
new_state = 1;
pdata->tx_pause = pdata->phy.tx_pause;
pdata->hw_if.config_tx_flow_control(pdata);
}
if (pdata->rx_pause != pdata->phy.rx_pause) {
new_state = 1;
pdata->rx_pause = pdata->phy.rx_pause;
pdata->hw_if.config_rx_flow_control(pdata);
}
/* Speed support */
if (pdata->phy_speed != pdata->phy.speed) {
new_state = 1;
pdata->phy_speed = pdata->phy.speed;
}
if (pdata->phy_link != pdata->phy.link) {
new_state = 1;
pdata->phy_link = pdata->phy.link;
}
} else if (pdata->phy_link) {
new_state = 1;
pdata->phy_link = 0;
pdata->phy_speed = SPEED_UNKNOWN;
}
if (new_state && netif_msg_link(pdata))
xgbe_phy_print_status(pdata);
}
static bool xgbe_phy_valid_speed(struct xgbe_prv_data *pdata, int speed)
{
return pdata->phy_if.phy_impl.valid_speed(pdata, speed);
}
static int xgbe_phy_config_fixed(struct xgbe_prv_data *pdata)
{
enum xgbe_mode mode;
netif_dbg(pdata, link, pdata->netdev, "fixed PHY configuration\n");
/* Disable auto-negotiation */
xgbe_an_disable(pdata);
/* Set specified mode for specified speed */
mode = pdata->phy_if.phy_impl.get_mode(pdata, pdata->phy.speed);
switch (mode) {
case XGBE_MODE_KX_1000:
case XGBE_MODE_KX_2500:
case XGBE_MODE_KR:
case XGBE_MODE_SGMII_100:
case XGBE_MODE_SGMII_1000:
case XGBE_MODE_X:
case XGBE_MODE_SFI:
break;
case XGBE_MODE_UNKNOWN:
default:
return -EINVAL;
}
/* Validate duplex mode */
if (pdata->phy.duplex != DUPLEX_FULL)
return -EINVAL;
xgbe_set_mode(pdata, mode);
return 0;
}
static int __xgbe_phy_config_aneg(struct xgbe_prv_data *pdata, bool set_mode)
{
int ret;
mutex_lock(&pdata->an_mutex);
set_bit(XGBE_LINK_INIT, &pdata->dev_state);
pdata->link_check = jiffies;
ret = pdata->phy_if.phy_impl.an_config(pdata);
if (ret)
goto out;
if (pdata->phy.autoneg != AUTONEG_ENABLE) {
ret = xgbe_phy_config_fixed(pdata);
if (ret || !pdata->kr_redrv)
goto out;
netif_dbg(pdata, link, pdata->netdev, "AN redriver support\n");
} else {
netif_dbg(pdata, link, pdata->netdev, "AN PHY configuration\n");
}
/* Disable auto-negotiation interrupt */
disable_irq(pdata->an_irq);
if (set_mode) {
/* Start auto-negotiation in a supported mode */
if (xgbe_use_mode(pdata, XGBE_MODE_KR)) {
xgbe_set_mode(pdata, XGBE_MODE_KR);
} else if (xgbe_use_mode(pdata, XGBE_MODE_KX_2500)) {
xgbe_set_mode(pdata, XGBE_MODE_KX_2500);
} else if (xgbe_use_mode(pdata, XGBE_MODE_KX_1000)) {
xgbe_set_mode(pdata, XGBE_MODE_KX_1000);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SFI)) {
xgbe_set_mode(pdata, XGBE_MODE_SFI);
} else if (xgbe_use_mode(pdata, XGBE_MODE_X)) {
xgbe_set_mode(pdata, XGBE_MODE_X);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SGMII_1000)) {
xgbe_set_mode(pdata, XGBE_MODE_SGMII_1000);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SGMII_100)) {
xgbe_set_mode(pdata, XGBE_MODE_SGMII_100);
} else {
enable_irq(pdata->an_irq);
ret = -EINVAL;
goto out;
}
}
/* Disable and stop any in progress auto-negotiation */
xgbe_an_disable_all(pdata);
/* Clear any auto-negotitation interrupts */
xgbe_an_clear_interrupts_all(pdata);
pdata->an_result = XGBE_AN_READY;
pdata->an_state = XGBE_AN_READY;
pdata->kr_state = XGBE_RX_BPA;
pdata->kx_state = XGBE_RX_BPA;
/* Re-enable auto-negotiation interrupt */
enable_irq(pdata->an_irq);
xgbe_an_init(pdata);
xgbe_an_restart(pdata);
out:
if (ret)
set_bit(XGBE_LINK_ERR, &pdata->dev_state);
else
clear_bit(XGBE_LINK_ERR, &pdata->dev_state);
mutex_unlock(&pdata->an_mutex);
return ret;
}
static int xgbe_phy_config_aneg(struct xgbe_prv_data *pdata)
{
return __xgbe_phy_config_aneg(pdata, true);
}
static int xgbe_phy_reconfig_aneg(struct xgbe_prv_data *pdata)
{
return __xgbe_phy_config_aneg(pdata, false);
}
static bool xgbe_phy_aneg_done(struct xgbe_prv_data *pdata)
{
return (pdata->an_result == XGBE_AN_COMPLETE);
}
static void xgbe_check_link_timeout(struct xgbe_prv_data *pdata)
{
unsigned long link_timeout;
unsigned long kr_time;
int wait;
link_timeout = pdata->link_check + (XGBE_LINK_TIMEOUT * HZ);
if (time_after(jiffies, link_timeout)) {
if ((xgbe_cur_mode(pdata) == XGBE_MODE_KR) &&
pdata->phy.autoneg == AUTONEG_ENABLE) {
/* AN restart should not happen while KR training is in progress.
* The while loop ensures no AN restart during KR training,
* waits up to 500ms and AN restart is triggered only if KR
* training is failed.
*/
wait = XGBE_KR_TRAINING_WAIT_ITER;
while (wait--) {
kr_time = pdata->kr_start_time +
msecs_to_jiffies(XGBE_AN_MS_TIMEOUT);
if (time_after(jiffies, kr_time))
break;
/* AN restart is not required, if AN result is COMPLETE */
if (pdata->an_result == XGBE_AN_COMPLETE)
return;
usleep_range(10000, 11000);
}
}
netif_dbg(pdata, link, pdata->netdev, "AN link timeout\n");
xgbe_phy_config_aneg(pdata);
}
}
static enum xgbe_mode xgbe_phy_status_aneg(struct xgbe_prv_data *pdata)
{
return pdata->phy_if.phy_impl.an_outcome(pdata);
}
static bool xgbe_phy_status_result(struct xgbe_prv_data *pdata)
{
struct ethtool_link_ksettings *lks = &pdata->phy.lks;
enum xgbe_mode mode;
XGBE_ZERO_LP_ADV(lks);
if ((pdata->phy.autoneg != AUTONEG_ENABLE) || pdata->parallel_detect)
mode = xgbe_cur_mode(pdata);
else
mode = xgbe_phy_status_aneg(pdata);
switch (mode) {
case XGBE_MODE_SGMII_100:
pdata->phy.speed = SPEED_100;
break;
case XGBE_MODE_X:
case XGBE_MODE_KX_1000:
case XGBE_MODE_SGMII_1000:
pdata->phy.speed = SPEED_1000;
break;
case XGBE_MODE_KX_2500:
pdata->phy.speed = SPEED_2500;
break;
case XGBE_MODE_KR:
case XGBE_MODE_SFI:
pdata->phy.speed = SPEED_10000;
break;
case XGBE_MODE_UNKNOWN:
default:
pdata->phy.speed = SPEED_UNKNOWN;
}
pdata->phy.duplex = DUPLEX_FULL;
if (!xgbe_set_mode(pdata, mode))
return false;
if (pdata->an_again)
xgbe_phy_reconfig_aneg(pdata);
return true;
}
static void xgbe_phy_status(struct xgbe_prv_data *pdata)
{
unsigned int link_aneg;
int an_restart;
if (test_bit(XGBE_LINK_ERR, &pdata->dev_state)) {
netif_carrier_off(pdata->netdev);
pdata->phy.link = 0;
goto adjust_link;
}
link_aneg = (pdata->phy.autoneg == AUTONEG_ENABLE);
pdata->phy.link = pdata->phy_if.phy_impl.link_status(pdata,
&an_restart);
if (an_restart) {
xgbe_phy_config_aneg(pdata);
goto adjust_link;
}
if (pdata->phy.link) {
if (link_aneg && !xgbe_phy_aneg_done(pdata)) {
xgbe_check_link_timeout(pdata);
return;
}
if (xgbe_phy_status_result(pdata))
return;
if (test_bit(XGBE_LINK_INIT, &pdata->dev_state))
clear_bit(XGBE_LINK_INIT, &pdata->dev_state);
netif_carrier_on(pdata->netdev);
} else {
if (test_bit(XGBE_LINK_INIT, &pdata->dev_state)) {
xgbe_check_link_timeout(pdata);
if (link_aneg)
return;
}
xgbe_phy_status_result(pdata);
netif_carrier_off(pdata->netdev);
}
adjust_link:
xgbe_phy_adjust_link(pdata);
}
static void xgbe_phy_stop(struct xgbe_prv_data *pdata)
{
netif_dbg(pdata, link, pdata->netdev, "stopping PHY\n");
if (!pdata->phy_started)
return;
/* Indicate the PHY is down */
pdata->phy_started = 0;
/* Disable auto-negotiation */
xgbe_an_disable_all(pdata);
if (pdata->dev_irq != pdata->an_irq) {
devm_free_irq(pdata->dev, pdata->an_irq, pdata);
tasklet_kill(&pdata->tasklet_an);
}
pdata->phy_if.phy_impl.stop(pdata);
pdata->phy.link = 0;
xgbe_phy_adjust_link(pdata);
}
static int xgbe_phy_start(struct xgbe_prv_data *pdata)
{
struct net_device *netdev = pdata->netdev;
int ret;
netif_dbg(pdata, link, pdata->netdev, "starting PHY\n");
ret = pdata->phy_if.phy_impl.start(pdata);
if (ret)
return ret;
/* If we have a separate AN irq, enable it */
if (pdata->dev_irq != pdata->an_irq) {
tasklet_setup(&pdata->tasklet_an, xgbe_an_isr_task);
ret = devm_request_irq(pdata->dev, pdata->an_irq,
xgbe_an_isr, 0, pdata->an_name,
pdata);
if (ret) {
netdev_err(netdev, "phy irq request failed\n");
goto err_stop;
}
}
/* Set initial mode - call the mode setting routines
* directly to insure we are properly configured
*/
if (xgbe_use_mode(pdata, XGBE_MODE_KR)) {
xgbe_kr_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_KX_2500)) {
xgbe_kx_2500_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_KX_1000)) {
xgbe_kx_1000_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SFI)) {
xgbe_sfi_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_X)) {
xgbe_x_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SGMII_1000)) {
xgbe_sgmii_1000_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SGMII_100)) {
xgbe_sgmii_100_mode(pdata);
} else {
ret = -EINVAL;
goto err_irq;
}
/* Indicate the PHY is up and running */
pdata->phy_started = 1;
xgbe_an_init(pdata);
xgbe_an_enable_interrupts(pdata);
return xgbe_phy_config_aneg(pdata);
err_irq:
if (pdata->dev_irq != pdata->an_irq)
devm_free_irq(pdata->dev, pdata->an_irq, pdata);
err_stop:
pdata->phy_if.phy_impl.stop(pdata);
return ret;
}
static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
{
int ret;
ret = pdata->phy_if.phy_impl.reset(pdata);
if (ret)
return ret;
/* Disable auto-negotiation for now */
xgbe_an_disable_all(pdata);
/* Clear auto-negotiation interrupts */
xgbe_an_clear_interrupts_all(pdata);
return 0;
}
static void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata)
{
struct device *dev = pdata->dev;
dev_dbg(dev, "\n************* PHY Reg dump **********************\n");
dev_dbg(dev, "PCS Control Reg (%#06x) = %#06x\n", MDIO_CTRL1,
XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1));
dev_dbg(dev, "PCS Status Reg (%#06x) = %#06x\n", MDIO_STAT1,
XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1));
dev_dbg(dev, "Phy Id (PHYS ID 1 %#06x)= %#06x\n", MDIO_DEVID1,
XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID1));
dev_dbg(dev, "Phy Id (PHYS ID 2 %#06x)= %#06x\n", MDIO_DEVID2,
XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID2));
dev_dbg(dev, "Devices in Package (%#06x)= %#06x\n", MDIO_DEVS1,
XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS1));
dev_dbg(dev, "Devices in Package (%#06x)= %#06x\n", MDIO_DEVS2,
XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS2));
dev_dbg(dev, "Auto-Neg Control Reg (%#06x) = %#06x\n", MDIO_CTRL1,
XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1));
dev_dbg(dev, "Auto-Neg Status Reg (%#06x) = %#06x\n", MDIO_STAT1,
XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_STAT1));
dev_dbg(dev, "Auto-Neg Ad Reg 1 (%#06x) = %#06x\n",
MDIO_AN_ADVERTISE,
XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE));
dev_dbg(dev, "Auto-Neg Ad Reg 2 (%#06x) = %#06x\n",
MDIO_AN_ADVERTISE + 1,
XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1));
dev_dbg(dev, "Auto-Neg Ad Reg 3 (%#06x) = %#06x\n",
MDIO_AN_ADVERTISE + 2,
XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2));
dev_dbg(dev, "Auto-Neg Completion Reg (%#06x) = %#06x\n",
MDIO_AN_COMP_STAT,
XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_COMP_STAT));
dev_dbg(dev, "\n*************************************************\n");
}
static int xgbe_phy_best_advertised_speed(struct xgbe_prv_data *pdata)
{
struct ethtool_link_ksettings *lks = &pdata->phy.lks;
if (XGBE_ADV(lks, 10000baseKR_Full))
return SPEED_10000;
else if (XGBE_ADV(lks, 10000baseT_Full))
return SPEED_10000;
else if (XGBE_ADV(lks, 2500baseX_Full))
return SPEED_2500;
else if (XGBE_ADV(lks, 2500baseT_Full))
return SPEED_2500;
else if (XGBE_ADV(lks, 1000baseKX_Full))
return SPEED_1000;
else if (XGBE_ADV(lks, 1000baseT_Full))
return SPEED_1000;
else if (XGBE_ADV(lks, 100baseT_Full))
return SPEED_100;
return SPEED_UNKNOWN;
}
static void xgbe_phy_exit(struct xgbe_prv_data *pdata)
{
pdata->phy_if.phy_impl.exit(pdata);
}
static int xgbe_phy_init(struct xgbe_prv_data *pdata)
{
struct ethtool_link_ksettings *lks = &pdata->phy.lks;
int ret;
mutex_init(&pdata->an_mutex);
INIT_WORK(&pdata->an_irq_work, xgbe_an_irq_work);
INIT_WORK(&pdata->an_work, xgbe_an_state_machine);
pdata->mdio_mmd = MDIO_MMD_PCS;
/* Check for FEC support */
pdata->fec_ability = XMDIO_READ(pdata, MDIO_MMD_PMAPMD,
MDIO_PMA_10GBR_FECABLE);
pdata->fec_ability &= (MDIO_PMA_10GBR_FECABLE_ABLE |
MDIO_PMA_10GBR_FECABLE_ERRABLE);
/* Setup the phy (including supported features) */
ret = pdata->phy_if.phy_impl.init(pdata);
if (ret)
return ret;
/* Copy supported link modes to advertising link modes */
XGBE_LM_COPY(lks, advertising, lks, supported);
pdata->phy.address = 0;
if (XGBE_ADV(lks, Autoneg)) {
pdata->phy.autoneg = AUTONEG_ENABLE;
pdata->phy.speed = SPEED_UNKNOWN;
pdata->phy.duplex = DUPLEX_UNKNOWN;
} else {
pdata->phy.autoneg = AUTONEG_DISABLE;
pdata->phy.speed = xgbe_phy_best_advertised_speed(pdata);
pdata->phy.duplex = DUPLEX_FULL;
}
pdata->phy.link = 0;
pdata->phy.pause_autoneg = pdata->pause_autoneg;
pdata->phy.tx_pause = pdata->tx_pause;
pdata->phy.rx_pause = pdata->rx_pause;
/* Fix up Flow Control advertising */
XGBE_CLR_ADV(lks, Pause);
XGBE_CLR_ADV(lks, Asym_Pause);
if (pdata->rx_pause) {
XGBE_SET_ADV(lks, Pause);
XGBE_SET_ADV(lks, Asym_Pause);
}
if (pdata->tx_pause) {
/* Equivalent to XOR of Asym_Pause */
if (XGBE_ADV(lks, Asym_Pause))
XGBE_CLR_ADV(lks, Asym_Pause);
else
XGBE_SET_ADV(lks, Asym_Pause);
}
if (netif_msg_drv(pdata))
xgbe_dump_phy_registers(pdata);
return 0;
}
void xgbe_init_function_ptrs_phy(struct xgbe_phy_if *phy_if)
{
phy_if->phy_init = xgbe_phy_init;
phy_if->phy_exit = xgbe_phy_exit;
phy_if->phy_reset = xgbe_phy_reset;
phy_if->phy_start = xgbe_phy_start;
phy_if->phy_stop = xgbe_phy_stop;
phy_if->phy_status = xgbe_phy_status;
phy_if->phy_config_aneg = xgbe_phy_config_aneg;
phy_if->phy_valid_speed = xgbe_phy_valid_speed;
phy_if->an_isr = xgbe_an_combined_isr;
phy_if->module_info = xgbe_phy_module_info;
phy_if->module_eeprom = xgbe_phy_module_eeprom;
}