From a10c1c8191e04c21769656c2ca8e1c69a6218954 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Thu, 7 Feb 2019 16:19:26 +0000
Subject: [PATCH] net: marvell: neta: add comphy support
Add support for the common phy binding, so that we can reconfigure the
comphy according to the desired ethernet speed. This will allow us to
support 1000base-X and 2500base-X SFPs dynamically on SolidRun Clearfog.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/marvell/mvneta.c | 45 +++++++++++++++++++++++++++++++----
1 file changed, 41 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -27,6 +27,7 @@
#include <linux/of_irq.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
+#include <linux/phy/phy.h>
#include <linux/phy.h>
#include <linux/phylink.h>
#include <linux/platform_device.h>
@@ -438,6 +439,7 @@ struct mvneta_port {
struct device_node *dn;
unsigned int tx_csum_limit;
struct phylink *phylink;
+ struct phy *comphy;
struct mvneta_bm *bm_priv;
struct mvneta_bm_pool *pool_long;
@@ -3167,6 +3169,8 @@ static void mvneta_start_dev(struct mvne
{
int cpu;
+ WARN_ON(phy_power_on(pp->comphy));
+
mvneta_max_rx_size_set(pp, pp->pkt_size);
mvneta_txq_max_tx_size_set(pp, pp->pkt_size);
@@ -3229,6 +3233,8 @@ static void mvneta_stop_dev(struct mvnet
mvneta_tx_reset(pp);
mvneta_rx_reset(pp);
+
+ WARN_ON(phy_power_off(pp->comphy));
}
static void mvneta_percpu_enable(void *arg)
@@ -3354,6 +3360,7 @@ static int mvneta_set_mac_addr(struct ne
static void mvneta_validate(struct net_device *ndev, unsigned long *supported,
struct phylink_link_state *state)
{
+ struct mvneta_port *pp = netdev_priv(ndev);
__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
/* We only support QSGMII, SGMII, 802.3z and RGMII modes */
@@ -3374,8 +3381,13 @@ static void mvneta_validate(struct net_d
phylink_set(mask, Pause);
/* Half-duplex at speeds higher than 100Mbit is unsupported */
- phylink_set(mask, 1000baseT_Full);
- phylink_set(mask, 1000baseX_Full);
+ if (pp->comphy || state->interface != PHY_INTERFACE_MODE_2500BASEX) {
+ phylink_set(mask, 1000baseT_Full);
+ phylink_set(mask, 1000baseX_Full);
+ }
+ if (pp->comphy || state->interface == PHY_INTERFACE_MODE_2500BASEX) {
+ phylink_set(mask, 2500baseX_Full);
+ }
if (!phy_interface_mode_is_8023z(state->interface)) {
/* 10M and 100M are only supported in non-802.3z mode */
@@ -3389,6 +3401,11 @@ static void mvneta_validate(struct net_d
__ETHTOOL_LINK_MODE_MASK_NBITS);
bitmap_and(state->advertising, state->advertising, mask,
__ETHTOOL_LINK_MODE_MASK_NBITS);
+
+ /* We can only operate at 2500BaseX or 1000BaseX. If requested
+ * to advertise both, only report advertising at 2500BaseX.
+ */
+ phylink_helper_basex_speed(state);
}
static int mvneta_mac_link_state(struct net_device *ndev,
@@ -3400,7 +3417,9 @@ static int mvneta_mac_link_state(struct
gmac_stat = mvreg_read(pp, MVNETA_GMAC_STATUS);
if (gmac_stat & MVNETA_GMAC_SPEED_1000)
- state->speed = SPEED_1000;
+ state->speed =
+ state->interface == PHY_INTERFACE_MODE_2500BASEX ?
+ SPEED_2500 : SPEED_1000;
else if (gmac_stat & MVNETA_GMAC_SPEED_100)
state->speed = SPEED_100;
else
@@ -3515,12 +3534,20 @@ static void mvneta_mac_config(struct net
MVNETA_GMAC_FORCE_LINK_DOWN);
}
+
/* When at 2.5G, the link partner can send frames with shortened
* preambles.
*/
if (state->speed == SPEED_2500)
new_ctrl4 |= MVNETA_GMAC4_SHORT_PREAMBLE_ENABLE;
+ if (pp->comphy &&
+ (state->interface == PHY_INTERFACE_MODE_SGMII ||
+ state->interface == PHY_INTERFACE_MODE_1000BASEX ||
+ state->interface == PHY_INTERFACE_MODE_2500BASEX))
+ WARN_ON(phy_set_mode_ext(pp->comphy, PHY_MODE_ETHERNET,
+ state->interface));
+
if (new_ctrl0 != gmac_ctrl0)
mvreg_write(pp, MVNETA_GMAC_CTRL_0, new_ctrl0);
if (new_ctrl2 != gmac_ctrl2)
@@ -4433,7 +4460,7 @@ static int mvneta_port_power_up(struct m
if (phy_mode == PHY_INTERFACE_MODE_QSGMII)
mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_QSGMII_SERDES_PROTO);
else if (phy_mode == PHY_INTERFACE_MODE_SGMII ||
- phy_mode == PHY_INTERFACE_MODE_1000BASEX)
+ phy_interface_mode_is_8023z(phy_mode))
mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_SGMII_SERDES_PROTO);
else if (!phy_interface_mode_is_rgmii(phy_mode))
return -EINVAL;
@@ -4450,6 +4477,7 @@ static int mvneta_probe(struct platform_
struct mvneta_port *pp;
struct net_device *dev;
struct phylink *phylink;
+ struct phy *comphy;
const char *dt_mac_addr;
char hw_mac_addr[ETH_ALEN];
const char *mac_from;
@@ -4475,6 +4503,14 @@ static int mvneta_probe(struct platform_
goto err_free_irq;
}
+ comphy = devm_of_phy_get(&pdev->dev, dn, NULL);
+ if (comphy == ERR_PTR(-EPROBE_DEFER)) {
+ err = -EPROBE_DEFER;
+ goto err_free_irq;
+ } else if (IS_ERR(comphy)) {
+ comphy = NULL;
+ }
+
phylink = phylink_create(dev, pdev->dev.fwnode, phy_mode,
&mvneta_phylink_ops);
if (IS_ERR(phylink)) {
@@ -4491,6 +4527,7 @@ static int mvneta_probe(struct platform_
pp = netdev_priv(dev);
spin_lock_init(&pp->lock);
pp->phylink = phylink;
+ pp->comphy = comphy;
pp->phy_interface = phy_mode;
pp->dn = dn;