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// SPDX-License-Identifier: GPL-2.0+
/* Microchip Sparx5 Switch driver
*
* Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
*/
#include <linux/module.h>
#include <linux/phylink.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/sfp.h>
#include "sparx5_main_regs.h"
#include "sparx5_main.h"
#include "sparx5_port.h"
static bool port_conf_has_changed(struct sparx5_port_config *a, struct sparx5_port_config *b)
{
if (a->speed != b->speed ||
a->portmode != b->portmode ||
a->autoneg != b->autoneg ||
a->pause_adv != b->pause_adv ||
a->power_down != b->power_down ||
a->media != b->media)
return true;
return false;
}
static struct phylink_pcs *
sparx5_phylink_mac_select_pcs(struct phylink_config *config,
phy_interface_t interface)
{
struct sparx5_port *port = netdev_priv(to_net_dev(config->dev));
return &port->phylink_pcs;
}
static void sparx5_phylink_mac_config(struct phylink_config *config,
unsigned int mode,
const struct phylink_link_state *state)
{
/* Currently not used */
}
static void sparx5_phylink_mac_link_up(struct phylink_config *config,
struct phy_device *phy,
unsigned int mode,
phy_interface_t interface,
int speed, int duplex,
bool tx_pause, bool rx_pause)
{
struct sparx5_port *port = netdev_priv(to_net_dev(config->dev));
struct sparx5_port_config conf;
int err;
conf = port->conf;
conf.duplex = duplex;
conf.pause = 0;
conf.pause |= tx_pause ? MLO_PAUSE_TX : 0;
conf.pause |= rx_pause ? MLO_PAUSE_RX : 0;
conf.speed = speed;
/* Configure the port to speed/duplex/pause */
err = sparx5_port_config(port->sparx5, port, &conf);
if (err)
netdev_err(port->ndev, "port config failed: %d\n", err);
}
static void sparx5_phylink_mac_link_down(struct phylink_config *config,
unsigned int mode,
phy_interface_t interface)
{
/* Currently not used */
}
static struct sparx5_port *sparx5_pcs_to_port(struct phylink_pcs *pcs)
{
return container_of(pcs, struct sparx5_port, phylink_pcs);
}
static void sparx5_pcs_get_state(struct phylink_pcs *pcs,
struct phylink_link_state *state)
{
struct sparx5_port *port = sparx5_pcs_to_port(pcs);
struct sparx5_port_status status;
sparx5_get_port_status(port->sparx5, port, &status);
state->link = status.link && !status.link_down;
state->an_complete = status.an_complete;
state->speed = status.speed;
state->duplex = status.duplex;
state->pause = status.pause;
}
static int sparx5_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
phy_interface_t interface,
const unsigned long *advertising,
bool permit_pause_to_mac)
{
struct sparx5_port *port = sparx5_pcs_to_port(pcs);
struct sparx5_port_config conf;
int ret = 0;
conf = port->conf;
conf.power_down = false;
conf.portmode = interface;
conf.inband = neg_mode == PHYLINK_PCS_NEG_INBAND_DISABLED ||
neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED;
conf.autoneg = neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED;
conf.pause_adv = 0;
if (phylink_test(advertising, Pause))
conf.pause_adv |= ADVERTISE_1000XPAUSE;
if (phylink_test(advertising, Asym_Pause))
conf.pause_adv |= ADVERTISE_1000XPSE_ASYM;
if (sparx5_is_baser(interface)) {
if (phylink_test(advertising, FIBRE))
conf.media = PHY_MEDIA_SR;
else
conf.media = PHY_MEDIA_DAC;
}
if (!port_conf_has_changed(&port->conf, &conf))
return ret;
/* Enable the PCS matching this interface type */
ret = sparx5_port_pcs_set(port->sparx5, port, &conf);
if (ret)
netdev_err(port->ndev, "port PCS config failed: %d\n", ret);
return ret;
}
static void sparx5_pcs_aneg_restart(struct phylink_pcs *pcs)
{
/* Currently not used */
}
const struct phylink_pcs_ops sparx5_phylink_pcs_ops = {
.pcs_get_state = sparx5_pcs_get_state,
.pcs_config = sparx5_pcs_config,
.pcs_an_restart = sparx5_pcs_aneg_restart,
};
const struct phylink_mac_ops sparx5_phylink_mac_ops = {
.mac_select_pcs = sparx5_phylink_mac_select_pcs,
.mac_config = sparx5_phylink_mac_config,
.mac_link_down = sparx5_phylink_mac_link_down,
.mac_link_up = sparx5_phylink_mac_link_up,
};
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