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OpenCloudOS-Kernel/drivers/net/phy/mdio-xpcs.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2020 Synopsys, Inc. and/or its affiliates.
* Synopsys DesignWare XPCS helpers
*
* Author: Jose Abreu <Jose.Abreu@synopsys.com>
*/
#include <linux/delay.h>
#include <linux/mdio.h>
#include <linux/mdio-xpcs.h>
#include <linux/phylink.h>
#include <linux/workqueue.h>
#define SYNOPSYS_XPCS_USXGMII_ID 0x7996ced0
#define SYNOPSYS_XPCS_10GKR_ID 0x7996ced0
#define SYNOPSYS_XPCS_XLGMII_ID 0x7996ced0
#define SYNOPSYS_XPCS_MASK 0xffffffff
/* Vendor regs access */
#define DW_VENDOR BIT(15)
/* VR_XS_PCS */
#define DW_USXGMII_RST BIT(10)
#define DW_USXGMII_EN BIT(9)
#define DW_VR_XS_PCS_DIG_STS 0x0010
#define DW_RXFIFO_ERR GENMASK(6, 5)
/* SR_MII */
#define DW_USXGMII_FULL BIT(8)
#define DW_USXGMII_SS_MASK (BIT(13) | BIT(6) | BIT(5))
#define DW_USXGMII_10000 (BIT(13) | BIT(6))
#define DW_USXGMII_5000 (BIT(13) | BIT(5))
#define DW_USXGMII_2500 (BIT(5))
#define DW_USXGMII_1000 (BIT(6))
#define DW_USXGMII_100 (BIT(13))
#define DW_USXGMII_10 (0)
/* SR_AN */
#define DW_SR_AN_ADV1 0x10
#define DW_SR_AN_ADV2 0x11
#define DW_SR_AN_ADV3 0x12
#define DW_SR_AN_LP_ABL1 0x13
#define DW_SR_AN_LP_ABL2 0x14
#define DW_SR_AN_LP_ABL3 0x15
/* Clause 73 Defines */
/* AN_LP_ABL1 */
#define DW_C73_PAUSE BIT(10)
#define DW_C73_ASYM_PAUSE BIT(11)
#define DW_C73_AN_ADV_SF 0x1
/* AN_LP_ABL2 */
#define DW_C73_1000KX BIT(5)
#define DW_C73_10000KX4 BIT(6)
#define DW_C73_10000KR BIT(7)
/* AN_LP_ABL3 */
#define DW_C73_2500KX BIT(0)
#define DW_C73_5000KR BIT(1)
static const int xpcs_usxgmii_features[] = {
ETHTOOL_LINK_MODE_Pause_BIT,
ETHTOOL_LINK_MODE_Asym_Pause_BIT,
ETHTOOL_LINK_MODE_Autoneg_BIT,
ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
__ETHTOOL_LINK_MODE_MASK_NBITS,
};
static const int xpcs_10gkr_features[] = {
ETHTOOL_LINK_MODE_Pause_BIT,
ETHTOOL_LINK_MODE_Asym_Pause_BIT,
ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
__ETHTOOL_LINK_MODE_MASK_NBITS,
};
static const int xpcs_xlgmii_features[] = {
ETHTOOL_LINK_MODE_Pause_BIT,
ETHTOOL_LINK_MODE_Asym_Pause_BIT,
ETHTOOL_LINK_MODE_25000baseCR_Full_BIT,
ETHTOOL_LINK_MODE_25000baseKR_Full_BIT,
ETHTOOL_LINK_MODE_25000baseSR_Full_BIT,
ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT,
ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT,
ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT,
ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT,
ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT,
ETHTOOL_LINK_MODE_50000baseKR_Full_BIT,
ETHTOOL_LINK_MODE_50000baseSR_Full_BIT,
ETHTOOL_LINK_MODE_50000baseCR_Full_BIT,
ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT,
ETHTOOL_LINK_MODE_50000baseDR_Full_BIT,
ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT,
ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT,
ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT,
ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT,
ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT,
ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT,
ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT,
ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT,
ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT,
__ETHTOOL_LINK_MODE_MASK_NBITS,
};
static const phy_interface_t xpcs_usxgmii_interfaces[] = {
PHY_INTERFACE_MODE_USXGMII,
PHY_INTERFACE_MODE_MAX,
};
static const phy_interface_t xpcs_10gkr_interfaces[] = {
PHY_INTERFACE_MODE_10GKR,
PHY_INTERFACE_MODE_MAX,
};
static const phy_interface_t xpcs_xlgmii_interfaces[] = {
PHY_INTERFACE_MODE_XLGMII,
PHY_INTERFACE_MODE_MAX,
};
static struct xpcs_id {
u32 id;
u32 mask;
const int *supported;
const phy_interface_t *interface;
} xpcs_id_list[] = {
{
.id = SYNOPSYS_XPCS_USXGMII_ID,
.mask = SYNOPSYS_XPCS_MASK,
.supported = xpcs_usxgmii_features,
.interface = xpcs_usxgmii_interfaces,
}, {
.id = SYNOPSYS_XPCS_10GKR_ID,
.mask = SYNOPSYS_XPCS_MASK,
.supported = xpcs_10gkr_features,
.interface = xpcs_10gkr_interfaces,
}, {
.id = SYNOPSYS_XPCS_XLGMII_ID,
.mask = SYNOPSYS_XPCS_MASK,
.supported = xpcs_xlgmii_features,
.interface = xpcs_xlgmii_interfaces,
},
};
static int xpcs_read(struct mdio_xpcs_args *xpcs, int dev, u32 reg)
{
u32 reg_addr = MII_ADDR_C45 | dev << 16 | reg;
return mdiobus_read(xpcs->bus, xpcs->addr, reg_addr);
}
static int xpcs_write(struct mdio_xpcs_args *xpcs, int dev, u32 reg, u16 val)
{
u32 reg_addr = MII_ADDR_C45 | dev << 16 | reg;
return mdiobus_write(xpcs->bus, xpcs->addr, reg_addr, val);
}
static int xpcs_read_vendor(struct mdio_xpcs_args *xpcs, int dev, u32 reg)
{
return xpcs_read(xpcs, dev, DW_VENDOR | reg);
}
static int xpcs_write_vendor(struct mdio_xpcs_args *xpcs, int dev, int reg,
u16 val)
{
return xpcs_write(xpcs, dev, DW_VENDOR | reg, val);
}
static int xpcs_read_vpcs(struct mdio_xpcs_args *xpcs, int reg)
{
return xpcs_read_vendor(xpcs, MDIO_MMD_PCS, reg);
}
static int xpcs_write_vpcs(struct mdio_xpcs_args *xpcs, int reg, u16 val)
{
return xpcs_write_vendor(xpcs, MDIO_MMD_PCS, reg, val);
}
static int xpcs_poll_reset(struct mdio_xpcs_args *xpcs, int dev)
{
/* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
unsigned int retries = 12;
int ret;
do {
msleep(50);
ret = xpcs_read(xpcs, dev, MDIO_CTRL1);
if (ret < 0)
return ret;
} while (ret & MDIO_CTRL1_RESET && --retries);
return (ret & MDIO_CTRL1_RESET) ? -ETIMEDOUT : 0;
}
static int xpcs_soft_reset(struct mdio_xpcs_args *xpcs, int dev)
{
int ret;
ret = xpcs_write(xpcs, dev, MDIO_CTRL1, MDIO_CTRL1_RESET);
if (ret < 0)
return ret;
return xpcs_poll_reset(xpcs, dev);
}
#define xpcs_warn(__xpcs, __state, __args...) \
({ \
if ((__state)->link) \
dev_warn(&(__xpcs)->bus->dev, ##__args); \
})
static int xpcs_read_fault(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state)
{
int ret;
ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
if (ret < 0)
return ret;
if (ret & MDIO_STAT1_FAULT) {
xpcs_warn(xpcs, state, "Link fault condition detected!\n");
return -EFAULT;
}
ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT2);
if (ret < 0)
return ret;
if (ret & MDIO_STAT2_RXFAULT)
xpcs_warn(xpcs, state, "Receiver fault detected!\n");
if (ret & MDIO_STAT2_TXFAULT)
xpcs_warn(xpcs, state, "Transmitter fault detected!\n");
ret = xpcs_read_vendor(xpcs, MDIO_MMD_PCS, DW_VR_XS_PCS_DIG_STS);
if (ret < 0)
return ret;
if (ret & DW_RXFIFO_ERR) {
xpcs_warn(xpcs, state, "FIFO fault condition detected!\n");
return -EFAULT;
}
ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT1);
if (ret < 0)
return ret;
if (!(ret & MDIO_PCS_10GBRT_STAT1_BLKLK))
xpcs_warn(xpcs, state, "Link is not locked!\n");
ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT2);
if (ret < 0)
return ret;
if (ret & MDIO_PCS_10GBRT_STAT2_ERR) {
xpcs_warn(xpcs, state, "Link has errors!\n");
return -EFAULT;
}
return 0;
}
static int xpcs_read_link(struct mdio_xpcs_args *xpcs, bool an)
{
bool link = true;
int ret;
ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
if (ret < 0)
return ret;
if (!(ret & MDIO_STAT1_LSTATUS))
link = false;
if (an) {
ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
if (ret < 0)
return ret;
if (!(ret & MDIO_STAT1_LSTATUS))
link = false;
}
return link;
}
static int xpcs_get_max_usxgmii_speed(const unsigned long *supported)
{
int max = SPEED_UNKNOWN;
if (phylink_test(supported, 1000baseKX_Full))
max = SPEED_1000;
if (phylink_test(supported, 2500baseX_Full))
max = SPEED_2500;
if (phylink_test(supported, 10000baseKX4_Full))
max = SPEED_10000;
if (phylink_test(supported, 10000baseKR_Full))
max = SPEED_10000;
return max;
}
static int xpcs_config_usxgmii(struct mdio_xpcs_args *xpcs, int speed)
{
int ret, speed_sel;
switch (speed) {
case SPEED_10:
speed_sel = DW_USXGMII_10;
break;
case SPEED_100:
speed_sel = DW_USXGMII_100;
break;
case SPEED_1000:
speed_sel = DW_USXGMII_1000;
break;
case SPEED_2500:
speed_sel = DW_USXGMII_2500;
break;
case SPEED_5000:
speed_sel = DW_USXGMII_5000;
break;
case SPEED_10000:
speed_sel = DW_USXGMII_10000;
break;
default:
/* Nothing to do here */
return -EINVAL;
}
ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
if (ret < 0)
return ret;
ret = xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_EN);
if (ret < 0)
return ret;
ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
if (ret < 0)
return ret;
ret &= ~DW_USXGMII_SS_MASK;
ret |= speed_sel | DW_USXGMII_FULL;
ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, ret);
if (ret < 0)
return ret;
ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
if (ret < 0)
return ret;
return xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_RST);
}
static int xpcs_config_aneg_c73(struct mdio_xpcs_args *xpcs)
{
int ret, adv;
/* By default, in USXGMII mode XPCS operates at 10G baud and
* replicates data to achieve lower speeds. Hereby, in this
* default configuration we need to advertise all supported
* modes and not only the ones we want to use.
*/
/* SR_AN_ADV3 */
adv = 0;
if (phylink_test(xpcs->supported, 2500baseX_Full))
adv |= DW_C73_2500KX;
/* TODO: 5000baseKR */
ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV3, adv);
if (ret < 0)
return ret;
/* SR_AN_ADV2 */
adv = 0;
if (phylink_test(xpcs->supported, 1000baseKX_Full))
adv |= DW_C73_1000KX;
if (phylink_test(xpcs->supported, 10000baseKX4_Full))
adv |= DW_C73_10000KX4;
if (phylink_test(xpcs->supported, 10000baseKR_Full))
adv |= DW_C73_10000KR;
ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV2, adv);
if (ret < 0)
return ret;
/* SR_AN_ADV1 */
adv = DW_C73_AN_ADV_SF;
if (phylink_test(xpcs->supported, Pause))
adv |= DW_C73_PAUSE;
if (phylink_test(xpcs->supported, Asym_Pause))
adv |= DW_C73_ASYM_PAUSE;
return xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV1, adv);
}
static int xpcs_config_aneg(struct mdio_xpcs_args *xpcs)
{
int ret;
ret = xpcs_config_aneg_c73(xpcs);
if (ret < 0)
return ret;
ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_CTRL1);
if (ret < 0)
return ret;
ret |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART;
return xpcs_write(xpcs, MDIO_MMD_AN, MDIO_CTRL1, ret);
}
static int xpcs_aneg_done(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state)
{
int ret;
ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
if (ret < 0)
return ret;
if (ret & MDIO_AN_STAT1_COMPLETE) {
ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
if (ret < 0)
return ret;
/* Check if Aneg outcome is valid */
if (!(ret & DW_C73_AN_ADV_SF)) {
xpcs_config_aneg(xpcs);
return 0;
}
return 1;
}
return 0;
}
static int xpcs_read_lpa(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state)
{
int ret;
ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
if (ret < 0)
return ret;
if (!(ret & MDIO_AN_STAT1_LPABLE)) {
phylink_clear(state->lp_advertising, Autoneg);
return 0;
}
phylink_set(state->lp_advertising, Autoneg);
/* Clause 73 outcome */
ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL3);
if (ret < 0)
return ret;
if (ret & DW_C73_2500KX)
phylink_set(state->lp_advertising, 2500baseX_Full);
ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL2);
if (ret < 0)
return ret;
if (ret & DW_C73_1000KX)
phylink_set(state->lp_advertising, 1000baseKX_Full);
if (ret & DW_C73_10000KX4)
phylink_set(state->lp_advertising, 10000baseKX4_Full);
if (ret & DW_C73_10000KR)
phylink_set(state->lp_advertising, 10000baseKR_Full);
ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
if (ret < 0)
return ret;
if (ret & DW_C73_PAUSE)
phylink_set(state->lp_advertising, Pause);
if (ret & DW_C73_ASYM_PAUSE)
phylink_set(state->lp_advertising, Asym_Pause);
linkmode_and(state->lp_advertising, state->lp_advertising,
state->advertising);
return 0;
}
static void xpcs_resolve_lpa(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state)
{
int max_speed = xpcs_get_max_usxgmii_speed(state->lp_advertising);
state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
state->speed = max_speed;
state->duplex = DUPLEX_FULL;
}
static int xpcs_get_max_xlgmii_speed(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state)
{
unsigned long *adv = state->advertising;
int speed = SPEED_UNKNOWN;
int bit;
for_each_set_bit(bit, adv, __ETHTOOL_LINK_MODE_MASK_NBITS) {
int new_speed = SPEED_UNKNOWN;
switch (bit) {
case ETHTOOL_LINK_MODE_25000baseCR_Full_BIT:
case ETHTOOL_LINK_MODE_25000baseKR_Full_BIT:
case ETHTOOL_LINK_MODE_25000baseSR_Full_BIT:
new_speed = SPEED_25000;
break;
case ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT:
case ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT:
case ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT:
case ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT:
new_speed = SPEED_40000;
break;
case ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT:
case ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT:
case ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT:
case ETHTOOL_LINK_MODE_50000baseKR_Full_BIT:
case ETHTOOL_LINK_MODE_50000baseSR_Full_BIT:
case ETHTOOL_LINK_MODE_50000baseCR_Full_BIT:
case ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT:
case ETHTOOL_LINK_MODE_50000baseDR_Full_BIT:
new_speed = SPEED_50000;
break;
case ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT:
case ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT:
new_speed = SPEED_100000;
break;
default:
continue;
}
if (new_speed > speed)
speed = new_speed;
}
return speed;
}
static void xpcs_resolve_pma(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state)
{
state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
state->duplex = DUPLEX_FULL;
switch (state->interface) {
case PHY_INTERFACE_MODE_10GKR:
state->speed = SPEED_10000;
break;
case PHY_INTERFACE_MODE_XLGMII:
state->speed = xpcs_get_max_xlgmii_speed(xpcs, state);
break;
default:
state->speed = SPEED_UNKNOWN;
break;
}
}
static int xpcs_validate(struct mdio_xpcs_args *xpcs,
unsigned long *supported,
struct phylink_link_state *state)
{
linkmode_and(supported, supported, xpcs->supported);
linkmode_and(state->advertising, state->advertising, xpcs->supported);
return 0;
}
static int xpcs_config(struct mdio_xpcs_args *xpcs,
const struct phylink_link_state *state)
{
int ret;
if (state->an_enabled) {
ret = xpcs_config_aneg(xpcs);
if (ret)
return ret;
}
return 0;
}
static int xpcs_get_state(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state)
{
int ret;
/* Link needs to be read first ... */
state->link = xpcs_read_link(xpcs, state->an_enabled) > 0 ? 1 : 0;
/* ... and then we check the faults. */
ret = xpcs_read_fault(xpcs, state);
if (ret) {
ret = xpcs_soft_reset(xpcs, MDIO_MMD_PCS);
if (ret)
return ret;
state->link = 0;
return xpcs_config(xpcs, state);
}
if (state->an_enabled && xpcs_aneg_done(xpcs, state)) {
state->an_complete = true;
xpcs_read_lpa(xpcs, state);
xpcs_resolve_lpa(xpcs, state);
} else if (state->an_enabled) {
state->link = 0;
} else if (state->link) {
xpcs_resolve_pma(xpcs, state);
}
return 0;
}
static int xpcs_link_up(struct mdio_xpcs_args *xpcs, int speed,
phy_interface_t interface)
{
if (interface == PHY_INTERFACE_MODE_USXGMII)
return xpcs_config_usxgmii(xpcs, speed);
return 0;
}
static u32 xpcs_get_id(struct mdio_xpcs_args *xpcs)
{
int ret;
u32 id;
ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID1);
if (ret < 0)
return 0xffffffff;
id = ret << 16;
ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID2);
if (ret < 0)
return 0xffffffff;
return id | ret;
}
static bool xpcs_check_features(struct mdio_xpcs_args *xpcs,
struct xpcs_id *match,
phy_interface_t interface)
{
int i;
for (i = 0; match->interface[i] != PHY_INTERFACE_MODE_MAX; i++) {
if (match->interface[i] == interface)
break;
}
if (match->interface[i] == PHY_INTERFACE_MODE_MAX)
return false;
for (i = 0; match->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
set_bit(match->supported[i], xpcs->supported);
return true;
}
static int xpcs_probe(struct mdio_xpcs_args *xpcs, phy_interface_t interface)
{
u32 xpcs_id = xpcs_get_id(xpcs);
struct xpcs_id *match = NULL;
int i;
for (i = 0; i < ARRAY_SIZE(xpcs_id_list); i++) {
struct xpcs_id *entry = &xpcs_id_list[i];
if ((xpcs_id & entry->mask) == entry->id) {
match = entry;
if (xpcs_check_features(xpcs, match, interface))
return xpcs_soft_reset(xpcs, MDIO_MMD_PCS);
}
}
return -ENODEV;
}
static struct mdio_xpcs_ops xpcs_ops = {
.validate = xpcs_validate,
.config = xpcs_config,
.get_state = xpcs_get_state,
.link_up = xpcs_link_up,
.probe = xpcs_probe,
};
struct mdio_xpcs_ops *mdio_xpcs_get_ops(void)
{
return &xpcs_ops;
}
EXPORT_SYMBOL_GPL(mdio_xpcs_get_ops);
MODULE_LICENSE("GPL v2");
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