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freebsd-src/sys/dev/axgbe/xgbe-mdio.c
Stephan de Wit 445bed5c4d axgbe: Various link stability and module compatibilty improvements 
Move the phy_stop() routine to if_detach() to prevent link interruptions
when configuring the interface. Accompanying this is a sanity check
using phy_started, which was already there but remained unused. We do
not move phy_start(), as the logic there is needed for any init routine,
be it attach or start.

Also bring in the linux PMA_PLL change which addresses the flapping of
back-to-back fiber connections.

Use miibus for SFP PHYs up to 1G copper. We retry in cases where the PHY
is not directly reachable.  Set the correct IFM_100_SGMII flag when the
phy speed has been set to 100. We remove xgbe_phy_start_aneg() since
it's handled by miibus.

Add support for 100 and 1000 BASE-BX fiber modules

Add support for 25G multirate DACs which are capable of 10G.

While here, also fixup the LINK_ERR state. It was impossible to recover
from this previously.

[[ Note: light style fixes by imp, slight commit message adjustment,
   and a warning that I don't have the hardware to validate, but
   the changes do track the commit message and seem otherwise OK ]]

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/768
2024-02-02 12:21:00 -07:00

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/*
* AMD 10Gb Ethernet driver
*
* Copyright (c) 2014-2016,2020 Advanced Micro Devices, Inc.
*
* This file is available to you under your choice of the following two
* licenses:
*
* License 1: GPLv2
*
* 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
*
* 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 <sys/cdefs.h>
#include "xgbe.h"
#include "xgbe-common.h"
static void xgbe_an_state_machine(struct xgbe_prv_data *pdata);
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:
axgbe_error("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);
}
static void
xgbe_an37_disable(struct xgbe_prv_data *pdata)
{
xgbe_an37_set(pdata, false, false);
xgbe_an37_disable_interrupts(pdata);
}
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);
}
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;
}
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);
/* Start KR training */
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);
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)
{
uint16_t 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 = ticks;
} else {
an_timeout = pdata->an_start +
((uint64_t)XGBE_AN_MS_TIMEOUT * (uint64_t)hz) / 1000ull;
if ((int)(ticks - an_timeout) > 0) {
/* Auto-negotiation timed out, reset state */
pdata->kr_state = XGBE_RX_BPA;
pdata->kx_state = XGBE_RX_BPA;
pdata->an_start = ticks;
axgbe_printf(2, "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)
{
/* Be sure we aren't looping trying to negotiate */
if (xgbe_in_kr_mode(pdata)) {
pdata->kr_state = XGBE_RX_ERROR;
if (!(XGBE_ADV(&pdata->phy, 1000baseKX_Full)) &&
!(XGBE_ADV(&pdata->phy, 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(&pdata->phy, 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);
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);
xgbe_an_state_machine(pdata);
} 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);
xgbe_an_state_machine(pdata);
} 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(unsigned long data)
{
struct xgbe_prv_data *pdata = (struct xgbe_prv_data *)data;
axgbe_printf(2, "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 void
xgbe_an_combined_isr(struct xgbe_prv_data *pdata)
{
xgbe_an_isr_task((unsigned long)pdata);
}
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;
}
axgbe_printf(2, "%s: CL37 AN %s\n", __func__,
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:
axgbe_printf(2, "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) {
axgbe_printf(2, "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);
axgbe_printf(2, "CL37 AN result: %s\n",
xgbe_state_as_string(pdata->an_result));
}
axgbe_printf(2, "%s: an_state %d an_int %d an_mode %d an_status %d\n",
__func__, pdata->an_state, pdata->an_int, pdata->an_mode,
pdata->an_status);
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)
goto out;
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:
axgbe_printf(2, "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;
axgbe_printf(2, "%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) {
axgbe_printf(2,
"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);
axgbe_printf(2, "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;
out:
/* Enable AN interrupts on the way out */
xgbe_an73_enable_interrupts(pdata);
}
static void
xgbe_an_state_machine(struct xgbe_prv_data *pdata)
{
sx_xlock(&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);
sx_xunlock(&pdata->an_mutex);
}
static void
xgbe_an37_init(struct xgbe_prv_data *pdata)
{
struct xgbe_phy local_phy;
unsigned int reg;
pdata->phy_if.phy_impl.an_advertising(pdata, &local_phy);
axgbe_printf(2, "%s: advertising 0x%x\n", __func__, local_phy.advertising);
/* Set up Advertisement register */
reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_ADVERTISE);
if (XGBE_ADV(&local_phy, Pause))
reg |= 0x100;
else
reg &= ~0x100;
if (XGBE_ADV(&local_phy, Asym_Pause))
reg |= 0x80;
else
reg &= ~0x80;
/* Full duplex, but not half */
reg |= XGBE_AN_CL37_FD_MASK;
reg &= ~XGBE_AN_CL37_HD_MASK;
axgbe_printf(2, "%s: Writing reg: 0x%x\n", __func__, reg);
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);
axgbe_printf(2, "%s: AN_ADVERTISE reg 0x%x an_mode %d\n", __func__,
reg, pdata->an_mode);
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;
axgbe_printf(2, "%s: Writing reg: 0x%x\n", __func__, reg);
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg);
axgbe_printf(2, "CL37 AN (%s) initialized\n",
(pdata->an_mode == XGBE_AN_MODE_CL37) ? "BaseX" : "SGMII");
}
static void
xgbe_an73_init(struct xgbe_prv_data *pdata)
{
/*
* This local_phy is needed because phy-v2 alters the
* advertising flag variable. so phy-v1 an_advertising is just copying
*/
struct xgbe_phy local_phy;
unsigned int reg;
pdata->phy_if.phy_impl.an_advertising(pdata, &local_phy);
/* Set up Advertisement register 3 first */
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
if (XGBE_ADV(&local_phy, 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(&local_phy, 10000baseKR_Full))
reg |= 0x80;
else
reg &= ~0x80;
if (XGBE_ADV(&local_phy, 1000baseKX_Full) ||
XGBE_ADV(&local_phy, 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(&local_phy, Pause))
reg |= 0x400;
else
reg &= ~0x400;
if (XGBE_ADV(&local_phy, 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);
axgbe_printf(2, "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);
axgbe_printf(2, "%s: setting up an_mode %d\n", __func__, pdata->an_mode);
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)
axgbe_printf(0,
"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
axgbe_printf(0, "Link is DOWN\n");
}
static void
xgbe_phy_adjust_link(struct xgbe_prv_data *pdata)
{
int new_state = 0;
axgbe_printf(1, "link %d/%d tx %d/%d rx %d/%d speed %d/%d autoneg %d/%d\n",
pdata->phy_link, pdata->phy.link,
pdata->tx_pause, pdata->phy.tx_pause,
pdata->rx_pause, pdata->phy.rx_pause,
pdata->phy_speed, pdata->phy.speed,
pdata->pause_autoneg, pdata->phy.pause_autoneg);
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;
axgbe_printf(2, "tx pause %d/%d\n", pdata->tx_pause,
pdata->phy.tx_pause);
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;
axgbe_printf(2, "rx pause %d/%d\n", pdata->rx_pause,
pdata->phy.rx_pause);
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;
}
axgbe_printf(2, "phy_link %d Link %d new_state %d\n", pdata->phy_link,
pdata->phy.link, new_state);
if (new_state)
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;
axgbe_printf(2, "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;
unsigned int reg = 0;
sx_xlock(&pdata->an_mutex);
set_bit(XGBE_LINK_INIT, &pdata->dev_state);
pdata->link_check = ticks;
ret = pdata->phy_if.phy_impl.an_config(pdata);
if (ret) {
axgbe_error("%s: an_config fail %d\n", __func__, ret);
goto out;
}
if (pdata->phy.autoneg != AUTONEG_ENABLE) {
ret = xgbe_phy_config_fixed(pdata);
if (ret || !pdata->kr_redrv) {
if (ret)
axgbe_error("%s: fix conf fail %d\n", __func__, ret);
goto out;
}
axgbe_printf(2, "AN redriver support\n");
} else
axgbe_printf(2, "AN PHY configuration\n");
/* Disable auto-negotiation interrupt */
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, 0);
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK);
axgbe_printf(2, "%s: set_mode %d AN int reg value 0x%x\n", __func__,
set_mode, reg);
/* Clear any auto-negotitation interrupts */
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0);
/* Start auto-negotiation in a supported mode */
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 {
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, 0x07);
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 */
XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, 0x07);
reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK);
/* Set up advertisement registers based on current settings */
xgbe_an_init(pdata);
/* Enable and start auto-negotiation */
xgbe_an_restart(pdata);
out:
if (ret) {
axgbe_printf(0, "%s: set_mode %d AN int reg value 0x%x ret value %d\n",
__func__, set_mode, reg, ret);
set_bit(XGBE_LINK_ERR, &pdata->dev_state);
} else
clear_bit(XGBE_LINK_ERR, &pdata->dev_state);
sx_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;
link_timeout = pdata->link_check + (XGBE_LINK_TIMEOUT * hz);
if ((int)(ticks - link_timeout) > 0) {
axgbe_printf(2, "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 void
xgbe_phy_status_result(struct xgbe_prv_data *pdata)
{
enum xgbe_mode mode;
XGBE_ZERO_LP_ADV(&pdata->phy);
if ((pdata->phy.autoneg != AUTONEG_ENABLE) || pdata->parallel_detect)
mode = xgbe_cur_mode(pdata);
else
mode = xgbe_phy_status_aneg(pdata);
axgbe_printf(3, "%s: xgbe mode %d\n", __func__, mode);
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:
axgbe_printf(1, "%s: unknown mode\n", __func__);
pdata->phy.speed = SPEED_UNKNOWN;
}
pdata->phy.duplex = DUPLEX_FULL;
axgbe_printf(2, "%s: speed %d duplex %d\n", __func__, pdata->phy.speed,
pdata->phy.duplex);
if (xgbe_set_mode(pdata, mode) && pdata->an_again)
xgbe_phy_reconfig_aneg(pdata);
}
static void
xgbe_phy_status(struct xgbe_prv_data *pdata)
{
bool link_aneg;
int an_restart;
if (test_bit(XGBE_LINK_ERR, &pdata->dev_state)) {
axgbe_error("%s: LINK_ERR\n", __func__);
pdata->phy.link = 0;
clear_bit(XGBE_LINK_ERR, &pdata->dev_state);
goto adjust_link;
}
link_aneg = (pdata->phy.autoneg == AUTONEG_ENABLE);
axgbe_printf(3, "link_aneg - %d\n", link_aneg);
/* Get the link status. Link status is latched low, so read
* once to clear and then read again to get current state
*/
pdata->phy.link = pdata->phy_if.phy_impl.link_status(pdata,
&an_restart);
axgbe_printf(1, "link_status returned Link:%d an_restart:%d aneg:%d\n",
pdata->phy.link, an_restart, link_aneg);
if (an_restart) {
xgbe_phy_config_aneg(pdata);
return;
}
if (pdata->phy.link) {
axgbe_printf(2, "Link Active\n");
if (link_aneg && !xgbe_phy_aneg_done(pdata)) {
axgbe_printf(1, "phy_link set check timeout\n");
xgbe_check_link_timeout(pdata);
return;
}
axgbe_printf(2, "%s: Link write phy_status result\n", __func__);
xgbe_phy_status_result(pdata);
if (test_bit(XGBE_LINK_INIT, &pdata->dev_state))
clear_bit(XGBE_LINK_INIT, &pdata->dev_state);
} else {
axgbe_printf(2, "Link Deactive\n");
if (test_bit(XGBE_LINK_INIT, &pdata->dev_state)) {
axgbe_printf(1, "phy_link not set check timeout\n");
xgbe_check_link_timeout(pdata);
if (link_aneg) {
axgbe_printf(2, "link_aneg case\n");
return;
}
}
xgbe_phy_status_result(pdata);
}
adjust_link:
axgbe_printf(2, "%s: Link %d\n", __func__, pdata->phy.link);
xgbe_phy_adjust_link(pdata);
}
static void
xgbe_phy_stop(struct xgbe_prv_data *pdata)
{
axgbe_printf(2, "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);
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)
{
int ret = 0;
if (pdata->phy_started)
return (ret);
DBGPR("-->xgbe_phy_start\n");
ret = pdata->phy_if.phy_impl.start(pdata);
if (ret) {
axgbe_error("%s: impl start ret %d\n", __func__, ret);
return (ret);
}
/* Set initial mode - call the mode setting routines
* directly to insure we are properly configured
*/
if (xgbe_use_mode(pdata, XGBE_MODE_KR)) {
axgbe_printf(2, "%s: KR\n", __func__);
xgbe_kr_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_KX_2500)) {
axgbe_printf(2, "%s: KX 2500\n", __func__);
xgbe_kx_2500_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_KX_1000)) {
axgbe_printf(2, "%s: KX 1000\n", __func__);
xgbe_kx_1000_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SFI)) {
axgbe_printf(2, "%s: SFI\n", __func__);
xgbe_sfi_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_X)) {
axgbe_printf(2, "%s: X\n", __func__);
xgbe_x_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SGMII_1000)) {
axgbe_printf(2, "%s: SGMII 1000\n", __func__);
xgbe_sgmii_1000_mode(pdata);
} else if (xgbe_use_mode(pdata, XGBE_MODE_SGMII_100)) {
axgbe_printf(2, "%s: SGMII 100\n", __func__);
xgbe_sgmii_100_mode(pdata);
} else {
axgbe_error("%s: invalid mode\n", __func__);
ret = -EINVAL;
goto err_stop;
}
/* Indicate the PHY is up and running */
pdata->phy_started = 1;
/* Set up advertisement registers based on current settings */
xgbe_an_init(pdata);
/* Enable auto-negotiation interrupts */
xgbe_an_enable_interrupts(pdata);
ret = xgbe_phy_config_aneg(pdata);
if (ret)
axgbe_error("%s: phy_config_aneg %d\n", __func__, ret);
return (ret);
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) {
axgbe_error("%s: impl phy reset %d\n", __func__, 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 int
xgbe_phy_best_advertised_speed(struct xgbe_prv_data *pdata)
{
if (XGBE_ADV(&pdata->phy, 10000baseKR_Full))
return (SPEED_10000);
else if (XGBE_ADV(&pdata->phy, 10000baseT_Full))
return (SPEED_10000);
else if (XGBE_ADV(&pdata->phy, 2500baseX_Full))
return (SPEED_2500);
else if (XGBE_ADV(&pdata->phy, 2500baseT_Full))
return (SPEED_2500);
else if (XGBE_ADV(&pdata->phy, 1000baseKX_Full))
return (SPEED_1000);
else if (XGBE_ADV(&pdata->phy, 1000baseT_Full))
return (SPEED_1000);
else if (XGBE_ADV(&pdata->phy, 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)
{
int ret = 0;
DBGPR("-->xgbe_phy_init\n");
sx_init(&pdata->an_mutex, "axgbe AN lock");
pdata->mdio_mmd = MDIO_MMD_PCS;
/* Initialize supported features */
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(&pdata->phy, advertising, &pdata->phy, supported);
pdata->phy.address = 0;
if (XGBE_ADV(&pdata->phy, 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_started = 0;
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(&pdata->phy, Pause);
XGBE_CLR_ADV(&pdata->phy, Asym_Pause);
if (pdata->rx_pause) {
XGBE_SET_ADV(&pdata->phy, Pause);
XGBE_SET_ADV(&pdata->phy, Asym_Pause);
}
if (pdata->tx_pause) {
if (XGBE_ADV(&pdata->phy, Asym_Pause))
XGBE_CLR_ADV(&pdata->phy, Asym_Pause);
else
XGBE_SET_ADV(&pdata->phy, Asym_Pause);
}
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;
}
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