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linuxdebug/drivers/net/dsa/mv88e6xxx/serdes.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Marvell 88E6xxx SERDES manipulation, via SMI bus
*
* Copyright (c) 2008 Marvell Semiconductor
*
* Copyright (c) 2017 Andrew Lunn <andrew@lunn.ch>
*/
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/mii.h>
#include "chip.h"
#include "global2.h"
#include "phy.h"
#include "port.h"
#include "serdes.h"
static int mv88e6352_serdes_read(struct mv88e6xxx_chip *chip, int reg,
u16 *val)
{
return mv88e6xxx_phy_page_read(chip, MV88E6352_ADDR_SERDES,
MV88E6352_SERDES_PAGE_FIBER,
reg, val);
}
static int mv88e6352_serdes_write(struct mv88e6xxx_chip *chip, int reg,
u16 val)
{
return mv88e6xxx_phy_page_write(chip, MV88E6352_ADDR_SERDES,
MV88E6352_SERDES_PAGE_FIBER,
reg, val);
}
static int mv88e6390_serdes_read(struct mv88e6xxx_chip *chip,
int lane, int device, int reg, u16 *val)
{
int reg_c45 = MII_ADDR_C45 | device << 16 | reg;
return mv88e6xxx_phy_read(chip, lane, reg_c45, val);
}
static int mv88e6390_serdes_write(struct mv88e6xxx_chip *chip,
int lane, int device, int reg, u16 val)
{
int reg_c45 = MII_ADDR_C45 | device << 16 | reg;
return mv88e6xxx_phy_write(chip, lane, reg_c45, val);
}
static int mv88e6xxx_serdes_pcs_get_state(struct mv88e6xxx_chip *chip,
u16 bmsr, u16 lpa, u16 status,
struct phylink_link_state *state)
{
state->link = false;
/* If the BMSR reports that the link had failed, report this to
* phylink.
*/
if (!(bmsr & BMSR_LSTATUS))
return 0;
state->link = !!(status & MV88E6390_SGMII_PHY_STATUS_LINK);
state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
if (status & MV88E6390_SGMII_PHY_STATUS_SPD_DPL_VALID) {
/* The Spped and Duplex Resolved register is 1 if AN is enabled
* and complete, or if AN is disabled. So with disabled AN we
* still get here on link up.
*/
state->duplex = status &
MV88E6390_SGMII_PHY_STATUS_DUPLEX_FULL ?
DUPLEX_FULL : DUPLEX_HALF;
if (status & MV88E6390_SGMII_PHY_STATUS_TX_PAUSE)
state->pause |= MLO_PAUSE_TX;
if (status & MV88E6390_SGMII_PHY_STATUS_RX_PAUSE)
state->pause |= MLO_PAUSE_RX;
switch (status & MV88E6390_SGMII_PHY_STATUS_SPEED_MASK) {
case MV88E6390_SGMII_PHY_STATUS_SPEED_1000:
if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
state->speed = SPEED_2500;
else
state->speed = SPEED_1000;
break;
case MV88E6390_SGMII_PHY_STATUS_SPEED_100:
state->speed = SPEED_100;
break;
case MV88E6390_SGMII_PHY_STATUS_SPEED_10:
state->speed = SPEED_10;
break;
default:
dev_err(chip->dev, "invalid PHY speed\n");
return -EINVAL;
}
} else if (state->link &&
state->interface != PHY_INTERFACE_MODE_SGMII) {
/* If Speed and Duplex Resolved register is 0 and link is up, it
* means that AN was enabled, but link partner had it disabled
* and the PHY invoked the Auto-Negotiation Bypass feature and
* linked anyway.
*/
state->duplex = DUPLEX_FULL;
if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
state->speed = SPEED_2500;
else
state->speed = SPEED_1000;
} else {
state->link = false;
}
if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
mii_lpa_mod_linkmode_x(state->lp_advertising, lpa,
ETHTOOL_LINK_MODE_2500baseX_Full_BIT);
else if (state->interface == PHY_INTERFACE_MODE_1000BASEX)
mii_lpa_mod_linkmode_x(state->lp_advertising, lpa,
ETHTOOL_LINK_MODE_1000baseX_Full_BIT);
return 0;
}
int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
bool up)
{
u16 val, new_val;
int err;
err = mv88e6352_serdes_read(chip, MII_BMCR, &val);
if (err)
return err;
if (up)
new_val = val & ~BMCR_PDOWN;
else
new_val = val | BMCR_PDOWN;
if (val != new_val)
err = mv88e6352_serdes_write(chip, MII_BMCR, new_val);
return err;
}
int mv88e6352_serdes_pcs_config(struct mv88e6xxx_chip *chip, int port,
int lane, unsigned int mode,
phy_interface_t interface,
const unsigned long *advertise)
{
u16 adv, bmcr, val;
bool changed;
int err;
switch (interface) {
case PHY_INTERFACE_MODE_SGMII:
adv = 0x0001;
break;
case PHY_INTERFACE_MODE_1000BASEX:
adv = linkmode_adv_to_mii_adv_x(advertise,
ETHTOOL_LINK_MODE_1000baseX_Full_BIT);
break;
default:
return 0;
}
err = mv88e6352_serdes_read(chip, MII_ADVERTISE, &val);
if (err)
return err;
changed = val != adv;
if (changed) {
err = mv88e6352_serdes_write(chip, MII_ADVERTISE, adv);
if (err)
return err;
}
err = mv88e6352_serdes_read(chip, MII_BMCR, &val);
if (err)
return err;
if (phylink_autoneg_inband(mode))
bmcr = val | BMCR_ANENABLE;
else
bmcr = val & ~BMCR_ANENABLE;
if (bmcr == val)
return changed;
return mv88e6352_serdes_write(chip, MII_BMCR, bmcr);
}
int mv88e6352_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
int lane, struct phylink_link_state *state)
{
u16 bmsr, lpa, status;
int err;
err = mv88e6352_serdes_read(chip, MII_BMSR, &bmsr);
if (err) {
dev_err(chip->dev, "can't read Serdes PHY BMSR: %d\n", err);
return err;
}
err = mv88e6352_serdes_read(chip, 0x11, &status);
if (err) {
dev_err(chip->dev, "can't read Serdes PHY status: %d\n", err);
return err;
}
err = mv88e6352_serdes_read(chip, MII_LPA, &lpa);
if (err) {
dev_err(chip->dev, "can't read Serdes PHY LPA: %d\n", err);
return err;
}
return mv88e6xxx_serdes_pcs_get_state(chip, bmsr, lpa, status, state);
}
int mv88e6352_serdes_pcs_an_restart(struct mv88e6xxx_chip *chip, int port,
int lane)
{
u16 bmcr;
int err;
err = mv88e6352_serdes_read(chip, MII_BMCR, &bmcr);
if (err)
return err;
return mv88e6352_serdes_write(chip, MII_BMCR, bmcr | BMCR_ANRESTART);
}
int mv88e6352_serdes_pcs_link_up(struct mv88e6xxx_chip *chip, int port,
int lane, int speed, int duplex)
{
u16 val, bmcr;
int err;
err = mv88e6352_serdes_read(chip, MII_BMCR, &val);
if (err)
return err;
bmcr = val & ~(BMCR_SPEED100 | BMCR_FULLDPLX | BMCR_SPEED1000);
switch (speed) {
case SPEED_1000:
bmcr |= BMCR_SPEED1000;
break;
case SPEED_100:
bmcr |= BMCR_SPEED100;
break;
case SPEED_10:
break;
}
if (duplex == DUPLEX_FULL)
bmcr |= BMCR_FULLDPLX;
if (bmcr == val)
return 0;
return mv88e6352_serdes_write(chip, MII_BMCR, bmcr);
}
int mv88e6352_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
u8 cmode = chip->ports[port].cmode;
int lane = -ENODEV;
if ((cmode == MV88E6XXX_PORT_STS_CMODE_100BASEX) ||
(cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX) ||
(cmode == MV88E6XXX_PORT_STS_CMODE_SGMII))
lane = 0xff; /* Unused */
return lane;
}
struct mv88e6352_serdes_hw_stat {
char string[ETH_GSTRING_LEN];
int sizeof_stat;
int reg;
};
static struct mv88e6352_serdes_hw_stat mv88e6352_serdes_hw_stats[] = {
{ "serdes_fibre_rx_error", 16, 21 },
{ "serdes_PRBS_error", 32, 24 },
};
int mv88e6352_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port)
{
int err;
err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
if (err <= 0)
return err;
return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
}
int mv88e6352_serdes_get_strings(struct mv88e6xxx_chip *chip,
int port, uint8_t *data)
{
struct mv88e6352_serdes_hw_stat *stat;
int err, i;
err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
if (err <= 0)
return err;
for (i = 0; i < ARRAY_SIZE(mv88e6352_serdes_hw_stats); i++) {
stat = &mv88e6352_serdes_hw_stats[i];
memcpy(data + i * ETH_GSTRING_LEN, stat->string,
ETH_GSTRING_LEN);
}
return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
}
static uint64_t mv88e6352_serdes_get_stat(struct mv88e6xxx_chip *chip,
struct mv88e6352_serdes_hw_stat *stat)
{
u64 val = 0;
u16 reg;
int err;
err = mv88e6352_serdes_read(chip, stat->reg, &reg);
if (err) {
dev_err(chip->dev, "failed to read statistic\n");
return 0;
}
val = reg;
if (stat->sizeof_stat == 32) {
err = mv88e6352_serdes_read(chip, stat->reg + 1, &reg);
if (err) {
dev_err(chip->dev, "failed to read statistic\n");
return 0;
}
val = val << 16 | reg;
}
return val;
}
int mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
uint64_t *data)
{
struct mv88e6xxx_port *mv88e6xxx_port = &chip->ports[port];
struct mv88e6352_serdes_hw_stat *stat;
int i, err;
u64 value;
err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
if (err <= 0)
return err;
BUILD_BUG_ON(ARRAY_SIZE(mv88e6352_serdes_hw_stats) >
ARRAY_SIZE(mv88e6xxx_port->serdes_stats));
for (i = 0; i < ARRAY_SIZE(mv88e6352_serdes_hw_stats); i++) {
stat = &mv88e6352_serdes_hw_stats[i];
value = mv88e6352_serdes_get_stat(chip, stat);
mv88e6xxx_port->serdes_stats[i] += value;
data[i] = mv88e6xxx_port->serdes_stats[i];
}
return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
}
static void mv88e6352_serdes_irq_link(struct mv88e6xxx_chip *chip, int port)
{
u16 bmsr;
int err;
/* If the link has dropped, we want to know about it. */
err = mv88e6352_serdes_read(chip, MII_BMSR, &bmsr);
if (err) {
dev_err(chip->dev, "can't read Serdes BMSR: %d\n", err);
return;
}
dsa_port_phylink_mac_change(chip->ds, port, !!(bmsr & BMSR_LSTATUS));
}
irqreturn_t mv88e6352_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
int lane)
{
irqreturn_t ret = IRQ_NONE;
u16 status;
int err;
err = mv88e6352_serdes_read(chip, MV88E6352_SERDES_INT_STATUS, &status);
if (err)
return ret;
if (status & MV88E6352_SERDES_INT_LINK_CHANGE) {
ret = IRQ_HANDLED;
mv88e6352_serdes_irq_link(chip, port);
}
return ret;
}
int mv88e6352_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, int lane,
bool enable)
{
u16 val = 0;
if (enable)
val |= MV88E6352_SERDES_INT_LINK_CHANGE;
return mv88e6352_serdes_write(chip, MV88E6352_SERDES_INT_ENABLE, val);
}
unsigned int mv88e6352_serdes_irq_mapping(struct mv88e6xxx_chip *chip, int port)
{
return irq_find_mapping(chip->g2_irq.domain, MV88E6352_SERDES_IRQ);
}
int mv88e6352_serdes_get_regs_len(struct mv88e6xxx_chip *chip, int port)
{
int err;
mv88e6xxx_reg_lock(chip);
err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
mv88e6xxx_reg_unlock(chip);
if (err <= 0)
return err;
return 32 * sizeof(u16);
}
void mv88e6352_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p)
{
u16 *p = _p;
u16 reg;
int err;
int i;
err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
if (err <= 0)
return;
for (i = 0 ; i < 32; i++) {
err = mv88e6352_serdes_read(chip, i, &reg);
if (!err)
p[i] = reg;
}
}
int mv88e6341_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
u8 cmode = chip->ports[port].cmode;
int lane = -ENODEV;
switch (port) {
case 5:
if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
lane = MV88E6341_PORT5_LANE;
break;
}
return lane;
}
int mv88e6185_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
bool up)
{
/* The serdes power can't be controlled on this switch chip but we need
* to supply this function to avoid returning -EOPNOTSUPP in
* mv88e6xxx_serdes_power_up/mv88e6xxx_serdes_power_down
*/
return 0;
}
int mv88e6185_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
/* There are no configurable serdes lanes on this switch chip but we
* need to return a non-negative lane number so that callers of
* mv88e6xxx_serdes_get_lane() know this is a serdes port.
*/
switch (chip->ports[port].cmode) {
case MV88E6185_PORT_STS_CMODE_SERDES:
case MV88E6185_PORT_STS_CMODE_1000BASE_X:
return 0;
default:
return -ENODEV;
}
}
int mv88e6185_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
int lane, struct phylink_link_state *state)
{
int err;
u16 status;
err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_STS, &status);
if (err)
return err;
state->link = !!(status & MV88E6XXX_PORT_STS_LINK);
if (state->link) {
state->duplex = status & MV88E6XXX_PORT_STS_DUPLEX ? DUPLEX_FULL : DUPLEX_HALF;
switch (status & MV88E6XXX_PORT_STS_SPEED_MASK) {
case MV88E6XXX_PORT_STS_SPEED_1000:
state->speed = SPEED_1000;
break;
case MV88E6XXX_PORT_STS_SPEED_100:
state->speed = SPEED_100;
break;
case MV88E6XXX_PORT_STS_SPEED_10:
state->speed = SPEED_10;
break;
default:
dev_err(chip->dev, "invalid PHY speed\n");
return -EINVAL;
}
} else {
state->duplex = DUPLEX_UNKNOWN;
state->speed = SPEED_UNKNOWN;
}
return 0;
}
int mv88e6097_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, int lane,
bool enable)
{
u8 cmode = chip->ports[port].cmode;
/* The serdes interrupts are enabled in the G2_INT_MASK register. We
* need to return 0 to avoid returning -EOPNOTSUPP in
* mv88e6xxx_serdes_irq_enable/mv88e6xxx_serdes_irq_disable
*/
switch (cmode) {
case MV88E6185_PORT_STS_CMODE_SERDES:
case MV88E6185_PORT_STS_CMODE_1000BASE_X:
return 0;
}
return -EOPNOTSUPP;
}
static void mv88e6097_serdes_irq_link(struct mv88e6xxx_chip *chip, int port)
{
u16 status;
int err;
err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_STS, &status);
if (err) {
dev_err(chip->dev, "can't read port status: %d\n", err);
return;
}
dsa_port_phylink_mac_change(chip->ds, port, !!(status & MV88E6XXX_PORT_STS_LINK));
}
irqreturn_t mv88e6097_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
int lane)
{
u8 cmode = chip->ports[port].cmode;
switch (cmode) {
case MV88E6185_PORT_STS_CMODE_SERDES:
case MV88E6185_PORT_STS_CMODE_1000BASE_X:
mv88e6097_serdes_irq_link(chip, port);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
int mv88e6390_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
u8 cmode = chip->ports[port].cmode;
int lane = -ENODEV;
switch (port) {
case 9:
if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
lane = MV88E6390_PORT9_LANE0;
break;
case 10:
if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
lane = MV88E6390_PORT10_LANE0;
break;
}
return lane;
}
int mv88e6390x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
u8 cmode_port = chip->ports[port].cmode;
u8 cmode_port10 = chip->ports[10].cmode;
u8 cmode_port9 = chip->ports[9].cmode;
int lane = -ENODEV;
switch (port) {
case 2:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
lane = MV88E6390_PORT9_LANE1;
break;
case 3:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
lane = MV88E6390_PORT9_LANE2;
break;
case 4:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
lane = MV88E6390_PORT9_LANE3;
break;
case 5:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
lane = MV88E6390_PORT10_LANE1;
break;
case 6:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
lane = MV88E6390_PORT10_LANE2;
break;
case 7:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
lane = MV88E6390_PORT10_LANE3;
break;
case 9:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_XAUI ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
lane = MV88E6390_PORT9_LANE0;
break;
case 10:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_XAUI ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
lane = MV88E6390_PORT10_LANE0;
break;
}
return lane;
}
/* Only Ports 0, 9 and 10 have SERDES lanes. Return the SERDES lane address
* a port is using else Returns -ENODEV.
*/
int mv88e6393x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
u8 cmode = chip->ports[port].cmode;
int lane = -ENODEV;
if (port != 0 && port != 9 && port != 10)
return -EOPNOTSUPP;
if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode == MV88E6393X_PORT_STS_CMODE_5GBASER ||
cmode == MV88E6393X_PORT_STS_CMODE_10GBASER)
lane = port;
return lane;
}
/* Set power up/down for 10GBASE-R and 10GBASE-X4/X2 */
static int mv88e6390_serdes_power_10g(struct mv88e6xxx_chip *chip, int lane,
bool up)
{
u16 val, new_val;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_10G_CTRL1, &val);
if (err)
return err;
if (up)
new_val = val & ~(MDIO_CTRL1_RESET |
MDIO_PCS_CTRL1_LOOPBACK |
MDIO_CTRL1_LPOWER);
else
new_val = val | MDIO_CTRL1_LPOWER;
if (val != new_val)
err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_10G_CTRL1, new_val);
return err;
}
/* Set power up/down for SGMII and 1000Base-X */
static int mv88e6390_serdes_power_sgmii(struct mv88e6xxx_chip *chip, int lane,
bool up)
{
u16 val, new_val;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR, &val);
if (err)
return err;
if (up)
new_val = val & ~(BMCR_RESET | BMCR_LOOPBACK | BMCR_PDOWN);
else
new_val = val | BMCR_PDOWN;
if (val != new_val)
err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR, new_val);
return err;
}
struct mv88e6390_serdes_hw_stat {
char string[ETH_GSTRING_LEN];
int reg;
};
static struct mv88e6390_serdes_hw_stat mv88e6390_serdes_hw_stats[] = {
{ "serdes_rx_pkts", 0xf021 },
{ "serdes_rx_bytes", 0xf024 },
{ "serdes_rx_pkts_error", 0xf027 },
};
int mv88e6390_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port)
{
if (mv88e6xxx_serdes_get_lane(chip, port) < 0)
return 0;
return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
}
int mv88e6390_serdes_get_strings(struct mv88e6xxx_chip *chip,
int port, uint8_t *data)
{
struct mv88e6390_serdes_hw_stat *stat;
int i;
if (mv88e6xxx_serdes_get_lane(chip, port) < 0)
return 0;
for (i = 0; i < ARRAY_SIZE(mv88e6390_serdes_hw_stats); i++) {
stat = &mv88e6390_serdes_hw_stats[i];
memcpy(data + i * ETH_GSTRING_LEN, stat->string,
ETH_GSTRING_LEN);
}
return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
}
static uint64_t mv88e6390_serdes_get_stat(struct mv88e6xxx_chip *chip, int lane,
struct mv88e6390_serdes_hw_stat *stat)
{
u16 reg[3];
int err, i;
for (i = 0; i < 3; i++) {
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
stat->reg + i, &reg[i]);
if (err) {
dev_err(chip->dev, "failed to read statistic\n");
return 0;
}
}
return reg[0] | ((u64)reg[1] << 16) | ((u64)reg[2] << 32);
}
int mv88e6390_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
uint64_t *data)
{
struct mv88e6390_serdes_hw_stat *stat;
int lane;
int i;
lane = mv88e6xxx_serdes_get_lane(chip, port);
if (lane < 0)
return 0;
for (i = 0; i < ARRAY_SIZE(mv88e6390_serdes_hw_stats); i++) {
stat = &mv88e6390_serdes_hw_stats[i];
data[i] = mv88e6390_serdes_get_stat(chip, lane, stat);
}
return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
}
static int mv88e6390_serdes_enable_checker(struct mv88e6xxx_chip *chip, int lane)
{
u16 reg;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_PG_CONTROL, &reg);
if (err)
return err;
reg |= MV88E6390_PG_CONTROL_ENABLE_PC;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_PG_CONTROL, reg);
}
int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
bool up)
{
u8 cmode = chip->ports[port].cmode;
int err;
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
err = mv88e6390_serdes_power_sgmii(chip, lane, up);
break;
case MV88E6XXX_PORT_STS_CMODE_XAUI:
case MV88E6XXX_PORT_STS_CMODE_RXAUI:
err = mv88e6390_serdes_power_10g(chip, lane, up);
break;
default:
err = -EINVAL;
break;
}
if (!err && up)
err = mv88e6390_serdes_enable_checker(chip, lane);
return err;
}
int mv88e6390_serdes_pcs_config(struct mv88e6xxx_chip *chip, int port,
int lane, unsigned int mode,
phy_interface_t interface,
const unsigned long *advertise)
{
u16 val, bmcr, adv;
bool changed;
int err;
switch (interface) {
case PHY_INTERFACE_MODE_SGMII:
adv = 0x0001;
break;
case PHY_INTERFACE_MODE_1000BASEX:
adv = linkmode_adv_to_mii_adv_x(advertise,
ETHTOOL_LINK_MODE_1000baseX_Full_BIT);
break;
case PHY_INTERFACE_MODE_2500BASEX:
adv = linkmode_adv_to_mii_adv_x(advertise,
ETHTOOL_LINK_MODE_2500baseX_Full_BIT);
break;
default:
return 0;
}
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_ADVERTISE, &val);
if (err)
return err;
changed = val != adv;
if (changed) {
err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_ADVERTISE, adv);
if (err)
return err;
}
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR, &val);
if (err)
return err;
if (phylink_autoneg_inband(mode))
bmcr = val | BMCR_ANENABLE;
else
bmcr = val & ~BMCR_ANENABLE;
/* setting ANENABLE triggers a restart of negotiation */
if (bmcr == val)
return changed;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR, bmcr);
}
static int mv88e6390_serdes_pcs_get_state_sgmii(struct mv88e6xxx_chip *chip,
int port, int lane, struct phylink_link_state *state)
{
u16 bmsr, lpa, status;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMSR, &bmsr);
if (err) {
dev_err(chip->dev, "can't read Serdes PHY BMSR: %d\n", err);
return err;
}
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_PHY_STATUS, &status);
if (err) {
dev_err(chip->dev, "can't read Serdes PHY status: %d\n", err);
return err;
}
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_LPA, &lpa);
if (err) {
dev_err(chip->dev, "can't read Serdes PHY LPA: %d\n", err);
return err;
}
return mv88e6xxx_serdes_pcs_get_state(chip, bmsr, lpa, status, state);
}
static int mv88e6390_serdes_pcs_get_state_10g(struct mv88e6xxx_chip *chip,
int port, int lane, struct phylink_link_state *state)
{
u16 status;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_10G_STAT1, &status);
if (err)
return err;
state->link = !!(status & MDIO_STAT1_LSTATUS);
if (state->link) {
state->speed = SPEED_10000;
state->duplex = DUPLEX_FULL;
}
return 0;
}
static int mv88e6393x_serdes_pcs_get_state_10g(struct mv88e6xxx_chip *chip,
int port, int lane,
struct phylink_link_state *state)
{
u16 status;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_10G_STAT1, &status);
if (err)
return err;
state->link = !!(status & MDIO_STAT1_LSTATUS);
if (state->link) {
if (state->interface == PHY_INTERFACE_MODE_5GBASER)
state->speed = SPEED_5000;
else
state->speed = SPEED_10000;
state->duplex = DUPLEX_FULL;
}
return 0;
}
int mv88e6390_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
int lane, struct phylink_link_state *state)
{
switch (state->interface) {
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_2500BASEX:
return mv88e6390_serdes_pcs_get_state_sgmii(chip, port, lane,
state);
case PHY_INTERFACE_MODE_XAUI:
case PHY_INTERFACE_MODE_RXAUI:
return mv88e6390_serdes_pcs_get_state_10g(chip, port, lane,
state);
default:
return -EOPNOTSUPP;
}
}
int mv88e6393x_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
int lane, struct phylink_link_state *state)
{
switch (state->interface) {
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_2500BASEX:
return mv88e6390_serdes_pcs_get_state_sgmii(chip, port, lane,
state);
case PHY_INTERFACE_MODE_5GBASER:
case PHY_INTERFACE_MODE_10GBASER:
return mv88e6393x_serdes_pcs_get_state_10g(chip, port, lane,
state);
default:
return -EOPNOTSUPP;
}
}
int mv88e6390_serdes_pcs_an_restart(struct mv88e6xxx_chip *chip, int port,
int lane)
{
u16 bmcr;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR, &bmcr);
if (err)
return err;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR,
bmcr | BMCR_ANRESTART);
}
int mv88e6390_serdes_pcs_link_up(struct mv88e6xxx_chip *chip, int port,
int lane, int speed, int duplex)
{
u16 val, bmcr;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR, &val);
if (err)
return err;
bmcr = val & ~(BMCR_SPEED100 | BMCR_FULLDPLX | BMCR_SPEED1000);
switch (speed) {
case SPEED_2500:
case SPEED_1000:
bmcr |= BMCR_SPEED1000;
break;
case SPEED_100:
bmcr |= BMCR_SPEED100;
break;
case SPEED_10:
break;
}
if (duplex == DUPLEX_FULL)
bmcr |= BMCR_FULLDPLX;
if (bmcr == val)
return 0;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMCR, bmcr);
}
static void mv88e6390_serdes_irq_link_sgmii(struct mv88e6xxx_chip *chip,
int port, int lane)
{
u16 bmsr;
int err;
/* If the link has dropped, we want to know about it. */
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_BMSR, &bmsr);
if (err) {
dev_err(chip->dev, "can't read Serdes BMSR: %d\n", err);
return;
}
dsa_port_phylink_mac_change(chip->ds, port, !!(bmsr & BMSR_LSTATUS));
}
static void mv88e6393x_serdes_irq_link_10g(struct mv88e6xxx_chip *chip,
int port, u8 lane)
{
u16 status;
int err;
/* If the link has dropped, we want to know about it. */
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_10G_STAT1, &status);
if (err) {
dev_err(chip->dev, "can't read Serdes STAT1: %d\n", err);
return;
}
dsa_port_phylink_mac_change(chip->ds, port, !!(status & MDIO_STAT1_LSTATUS));
}
static int mv88e6390_serdes_irq_enable_sgmii(struct mv88e6xxx_chip *chip,
int lane, bool enable)
{
u16 val = 0;
if (enable)
val |= MV88E6390_SGMII_INT_LINK_DOWN |
MV88E6390_SGMII_INT_LINK_UP;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_INT_ENABLE, val);
}
int mv88e6390_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, int lane,
bool enable)
{
u8 cmode = chip->ports[port].cmode;
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
return mv88e6390_serdes_irq_enable_sgmii(chip, lane, enable);
}
return 0;
}
static int mv88e6390_serdes_irq_status_sgmii(struct mv88e6xxx_chip *chip,
int lane, u16 *status)
{
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6390_SGMII_INT_STATUS, status);
return err;
}
static int mv88e6393x_serdes_irq_enable_10g(struct mv88e6xxx_chip *chip,
u8 lane, bool enable)
{
u16 val = 0;
if (enable)
val |= MV88E6393X_10G_INT_LINK_CHANGE;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_10G_INT_ENABLE, val);
}
int mv88e6393x_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port,
int lane, bool enable)
{
u8 cmode = chip->ports[port].cmode;
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
return mv88e6390_serdes_irq_enable_sgmii(chip, lane, enable);
case MV88E6393X_PORT_STS_CMODE_5GBASER:
case MV88E6393X_PORT_STS_CMODE_10GBASER:
return mv88e6393x_serdes_irq_enable_10g(chip, lane, enable);
}
return 0;
}
static int mv88e6393x_serdes_irq_status_10g(struct mv88e6xxx_chip *chip,
u8 lane, u16 *status)
{
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_10G_INT_STATUS, status);
return err;
}
irqreturn_t mv88e6393x_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
int lane)
{
u8 cmode = chip->ports[port].cmode;
irqreturn_t ret = IRQ_NONE;
u16 status;
int err;
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
err = mv88e6390_serdes_irq_status_sgmii(chip, lane, &status);
if (err)
return ret;
if (status & (MV88E6390_SGMII_INT_LINK_DOWN |
MV88E6390_SGMII_INT_LINK_UP)) {
ret = IRQ_HANDLED;
mv88e6390_serdes_irq_link_sgmii(chip, port, lane);
}
break;
case MV88E6393X_PORT_STS_CMODE_5GBASER:
case MV88E6393X_PORT_STS_CMODE_10GBASER:
err = mv88e6393x_serdes_irq_status_10g(chip, lane, &status);
if (err)
return err;
if (status & MV88E6393X_10G_INT_LINK_CHANGE) {
ret = IRQ_HANDLED;
mv88e6393x_serdes_irq_link_10g(chip, port, lane);
}
break;
}
return ret;
}
irqreturn_t mv88e6390_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
int lane)
{
u8 cmode = chip->ports[port].cmode;
irqreturn_t ret = IRQ_NONE;
u16 status;
int err;
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
err = mv88e6390_serdes_irq_status_sgmii(chip, lane, &status);
if (err)
return ret;
if (status & (MV88E6390_SGMII_INT_LINK_DOWN |
MV88E6390_SGMII_INT_LINK_UP)) {
ret = IRQ_HANDLED;
mv88e6390_serdes_irq_link_sgmii(chip, port, lane);
}
}
return ret;
}
unsigned int mv88e6390_serdes_irq_mapping(struct mv88e6xxx_chip *chip, int port)
{
return irq_find_mapping(chip->g2_irq.domain, port);
}
static const u16 mv88e6390_serdes_regs[] = {
/* SERDES common registers */
0xf00a, 0xf00b, 0xf00c,
0xf010, 0xf011, 0xf012, 0xf013,
0xf016, 0xf017, 0xf018,
0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
0xf028, 0xf029,
0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
0xf038, 0xf039,
/* SGMII */
0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007,
0x2008,
0x200f,
0xa000, 0xa001, 0xa002, 0xa003,
/* 10Gbase-X */
0x1000, 0x1001, 0x1002, 0x1003, 0x1004, 0x1005, 0x1006, 0x1007,
0x1008,
0x100e, 0x100f,
0x1018, 0x1019,
0x9000, 0x9001, 0x9002, 0x9003, 0x9004,
0x9006,
0x9010, 0x9011, 0x9012, 0x9013, 0x9014, 0x9015, 0x9016,
/* 10Gbase-R */
0x1020, 0x1021, 0x1022, 0x1023, 0x1024, 0x1025, 0x1026, 0x1027,
0x1028, 0x1029, 0x102a, 0x102b,
};
int mv88e6390_serdes_get_regs_len(struct mv88e6xxx_chip *chip, int port)
{
if (mv88e6xxx_serdes_get_lane(chip, port) < 0)
return 0;
return ARRAY_SIZE(mv88e6390_serdes_regs) * sizeof(u16);
}
void mv88e6390_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p)
{
u16 *p = _p;
int lane;
u16 reg;
int err;
int i;
lane = mv88e6xxx_serdes_get_lane(chip, port);
if (lane < 0)
return;
for (i = 0 ; i < ARRAY_SIZE(mv88e6390_serdes_regs); i++) {
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
mv88e6390_serdes_regs[i], &reg);
if (!err)
p[i] = reg;
}
}
static const int mv88e6352_serdes_p2p_to_reg[] = {
/* Index of value in microvolts corresponds to the register value */
14000, 112000, 210000, 308000, 406000, 504000, 602000, 700000,
};
int mv88e6352_serdes_set_tx_amplitude(struct mv88e6xxx_chip *chip, int port,
int val)
{
bool found = false;
u16 ctrl, reg;
int err;
int i;
err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
if (err <= 0)
return err;
for (i = 0; i < ARRAY_SIZE(mv88e6352_serdes_p2p_to_reg); ++i) {
if (mv88e6352_serdes_p2p_to_reg[i] == val) {
reg = i;
found = true;
break;
}
}
if (!found)
return -EINVAL;
err = mv88e6352_serdes_read(chip, MV88E6352_SERDES_SPEC_CTRL2, &ctrl);
if (err)
return err;
ctrl &= ~MV88E6352_SERDES_OUT_AMP_MASK;
ctrl |= reg;
return mv88e6352_serdes_write(chip, MV88E6352_SERDES_SPEC_CTRL2, ctrl);
}
static int mv88e6393x_serdes_power_lane(struct mv88e6xxx_chip *chip, int lane,
bool on)
{
u16 reg;
int err;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_SERDES_CTRL1, &reg);
if (err)
return err;
if (on)
reg &= ~(MV88E6393X_SERDES_CTRL1_TX_PDOWN |
MV88E6393X_SERDES_CTRL1_RX_PDOWN);
else
reg |= MV88E6393X_SERDES_CTRL1_TX_PDOWN |
MV88E6393X_SERDES_CTRL1_RX_PDOWN;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_SERDES_CTRL1, reg);
}
static int mv88e6393x_serdes_erratum_4_6(struct mv88e6xxx_chip *chip, int lane)
{
u16 reg;
int err;
/* mv88e6393x family errata 4.6:
* Cannot clear PwrDn bit on SERDES if device is configured CPU_MGD
* mode or P0_mode is configured for [x]MII.
* Workaround: Set SERDES register 4.F002 bit 5=0 and bit 15=1.
*
* It seems that after this workaround the SERDES is automatically
* powered up (the bit is cleared), so power it down.
*/
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_SERDES_POC, &reg);
if (err)
return err;
reg &= ~MV88E6393X_SERDES_POC_PDOWN;
reg |= MV88E6393X_SERDES_POC_RESET;
err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_SERDES_POC, reg);
if (err)
return err;
err = mv88e6390_serdes_power_sgmii(chip, lane, false);
if (err)
return err;
return mv88e6393x_serdes_power_lane(chip, lane, false);
}
int mv88e6393x_serdes_setup_errata(struct mv88e6xxx_chip *chip)
{
int err;
err = mv88e6393x_serdes_erratum_4_6(chip, MV88E6393X_PORT0_LANE);
if (err)
return err;
err = mv88e6393x_serdes_erratum_4_6(chip, MV88E6393X_PORT9_LANE);
if (err)
return err;
return mv88e6393x_serdes_erratum_4_6(chip, MV88E6393X_PORT10_LANE);
}
static int mv88e6393x_serdes_erratum_4_8(struct mv88e6xxx_chip *chip, int lane)
{
u16 reg, pcs;
int err;
/* mv88e6393x family errata 4.8:
* When a SERDES port is operating in 1000BASE-X or SGMII mode link may
* not come up after hardware reset or software reset of SERDES core.
* Workaround is to write SERDES register 4.F074.14=1 for only those
* modes and 0 in all other modes.
*/
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_SERDES_POC, &pcs);
if (err)
return err;
pcs &= MV88E6393X_SERDES_POC_PCS_MASK;
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_ERRATA_4_8_REG, &reg);
if (err)
return err;
if (pcs == MV88E6393X_SERDES_POC_PCS_1000BASEX ||
pcs == MV88E6393X_SERDES_POC_PCS_SGMII_PHY ||
pcs == MV88E6393X_SERDES_POC_PCS_SGMII_MAC)
reg |= MV88E6393X_ERRATA_4_8_BIT;
else
reg &= ~MV88E6393X_ERRATA_4_8_BIT;
return mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_ERRATA_4_8_REG, reg);
}
static int mv88e6393x_serdes_erratum_5_2(struct mv88e6xxx_chip *chip, int lane,
u8 cmode)
{
static const struct {
u16 dev, reg, val, mask;
} fixes[] = {
{ MDIO_MMD_VEND1, 0x8093, 0xcb5a, 0xffff },
{ MDIO_MMD_VEND1, 0x8171, 0x7088, 0xffff },
{ MDIO_MMD_VEND1, 0x80c9, 0x311a, 0xffff },
{ MDIO_MMD_VEND1, 0x80a2, 0x8000, 0xff7f },
{ MDIO_MMD_VEND1, 0x80a9, 0x0000, 0xfff0 },
{ MDIO_MMD_VEND1, 0x80a3, 0x0000, 0xf8ff },
{ MDIO_MMD_PHYXS, MV88E6393X_SERDES_POC,
MV88E6393X_SERDES_POC_RESET, MV88E6393X_SERDES_POC_RESET },
};
int err, i;
u16 reg;
/* mv88e6393x family errata 5.2:
* For optimal signal integrity the following sequence should be applied
* to SERDES operating in 10G mode. These registers only apply to 10G
* operation and have no effect on other speeds.
*/
if (cmode != MV88E6393X_PORT_STS_CMODE_10GBASER)
return 0;
for (i = 0; i < ARRAY_SIZE(fixes); ++i) {
err = mv88e6390_serdes_read(chip, lane, fixes[i].dev,
fixes[i].reg, &reg);
if (err)
return err;
reg &= ~fixes[i].mask;
reg |= fixes[i].val;
err = mv88e6390_serdes_write(chip, lane, fixes[i].dev,
fixes[i].reg, reg);
if (err)
return err;
}
return 0;
}
static int mv88e6393x_serdes_fix_2500basex_an(struct mv88e6xxx_chip *chip,
int lane, u8 cmode, bool on)
{
u16 reg;
int err;
if (cmode != MV88E6XXX_PORT_STS_CMODE_2500BASEX)
return 0;
/* Inband AN is broken on Amethyst in 2500base-x mode when set by
* standard mechanism (via cmode).
* We can get around this by configuring the PCS mode to 1000base-x
* and then writing value 0x58 to register 1e.8000. (This must be done
* while SerDes receiver and transmitter are disabled, which is, when
* this function is called.)
* It seem that when we do this configuration to 2500base-x mode (by
* changing PCS mode to 1000base-x and frequency to 3.125 GHz from
* 1.25 GHz) and then configure to sgmii or 1000base-x, the device
* thinks that it already has SerDes at 1.25 GHz and does not change
* the 1e.8000 register, leaving SerDes at 3.125 GHz.
* To avoid this, change PCS mode back to 2500base-x when disabling
* SerDes from 2500base-x mode.
*/
err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_SERDES_POC, &reg);
if (err)
return err;
reg &= ~(MV88E6393X_SERDES_POC_PCS_MASK | MV88E6393X_SERDES_POC_AN);
if (on)
reg |= MV88E6393X_SERDES_POC_PCS_1000BASEX |
MV88E6393X_SERDES_POC_AN;
else
reg |= MV88E6393X_SERDES_POC_PCS_2500BASEX;
reg |= MV88E6393X_SERDES_POC_RESET;
err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
MV88E6393X_SERDES_POC, reg);
if (err)
return err;
err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_VEND1, 0x8000, 0x58);
if (err)
return err;
return 0;
}
int mv88e6393x_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
bool on)
{
u8 cmode = chip->ports[port].cmode;
int err;
if (port != 0 && port != 9 && port != 10)
return -EOPNOTSUPP;
if (on) {
err = mv88e6393x_serdes_erratum_4_8(chip, lane);
if (err)
return err;
err = mv88e6393x_serdes_erratum_5_2(chip, lane, cmode);
if (err)
return err;
err = mv88e6393x_serdes_fix_2500basex_an(chip, lane, cmode,
true);
if (err)
return err;
err = mv88e6393x_serdes_power_lane(chip, lane, true);
if (err)
return err;
}
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
err = mv88e6390_serdes_power_sgmii(chip, lane, on);
break;
case MV88E6393X_PORT_STS_CMODE_5GBASER:
case MV88E6393X_PORT_STS_CMODE_10GBASER:
err = mv88e6390_serdes_power_10g(chip, lane, on);
break;
default:
err = -EINVAL;
break;
}
if (err)
return err;
if (!on) {
err = mv88e6393x_serdes_power_lane(chip, lane, false);
if (err)
return err;
err = mv88e6393x_serdes_fix_2500basex_an(chip, lane, cmode,
false);
}
return err;
}