[PATCH net-next v4 4/4] net: stmmac: dwmac-sogfpga: use the lynx pcs driver

Maxime Chevallier
2023-06-01T14:15:50Z

dwmac_socfpga re-implements support for the TSE PCS, which is identical
to the already existing TSE PCS, which in turn is the same as the Lynx
PCS. Drop the existing TSE re-implemenation and use the Lynx PCS
instead, relying on the regmap-mdio driver to translate MDIO accesses
into mmio accesses.

Add a lynx_pcs reference in the stmmac's internal structure, and use
.mac_select_pcs() to return the relevant PCS to be used.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
V3->V4 :
- Use pcs_lynx_create/destroy()
- Add a missing cleanup step for this PCS
- rename the new PCS field from phylink_pcs to lynx_pcs, as we
need to know which kind of PCS it is to call the proper
cleanup helper
- Add missing Kconfig dependencies
V2->V3 : No changes
V1->V2 : No changes

drivers/net/ethernet/stmicro/stmmac/Kconfig | 3 +
drivers/net/ethernet/stmicro/stmmac/Makefile | 2 +-
.../ethernet/stmicro/stmmac/altr_tse_pcs.c | 257 ------------------
.../ethernet/stmicro/stmmac/altr_tse_pcs.h | 29 --
drivers/net/ethernet/stmicro/stmmac/common.h | 2 +
.../ethernet/stmicro/stmmac/dwmac-socfpga.c | 91 +++++--
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 12 +-
.../net/ethernet/stmicro/stmmac/stmmac_mdio.c | 3 +
8 files changed, 83 insertions(+), 316 deletions(-)
delete mode 100644 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c
delete mode 100644 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h

diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 5f5a997f21f3..5583f0b055ec 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -158,6 +158,9 @@ config DWMAC_SOCFPGA
default ARCH_INTEL_SOCFPGA
depends on OF && (ARCH_INTEL_SOCFPGA || COMPILE_TEST)
select MFD_SYSCON
+ select MDIO_REGMAP
+ select REGMAP_MMIO
+ select PCS_LYNX
help
Support for ethernet controller on Altera SOCFPGA

diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index 8738fdbb4b2d..7dd3d388068b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -35,7 +35,7 @@ obj-$(CONFIG_DWMAC_IMX8) += dwmac-imx.o
obj-$(CONFIG_DWMAC_TEGRA) += dwmac-tegra.o
obj-$(CONFIG_DWMAC_VISCONTI) += dwmac-visconti.o
stmmac-platform-objs:= stmmac_platform.o
-dwmac-altr-socfpga-objs := altr_tse_pcs.o dwmac-socfpga.o
+dwmac-altr-socfpga-objs := dwmac-socfpga.o

obj-$(CONFIG_STMMAC_PCI) += stmmac-pci.o
obj-$(CONFIG_DWMAC_INTEL) += dwmac-intel.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c b/drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c
deleted file mode 100644
index 00f6d347eaf7..000000000000
--- a/drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c
+++ /dev/null
@@ -1,257 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* Copyright Altera Corporation (C) 2016. All rights reserved.
- *
- * Author: Tien Hock Loh <thloh@altera.com>
- */
-
-#include <linux/mfd/syscon.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_net.h>
-#include <linux/phy.h>
-#include <linux/regmap.h>
-#include <linux/reset.h>
-#include <linux/stmmac.h>
-
-#include "stmmac.h"
-#include "stmmac_platform.h"
-#include "altr_tse_pcs.h"
-
-#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0
-#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII BIT(1)
-#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII BIT(2)
-#define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
-#define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK GENMASK(1, 0)
-
-#define TSE_PCS_CONTROL_AN_EN_MASK BIT(12)
-#define TSE_PCS_CONTROL_REG 0x00
-#define TSE_PCS_CONTROL_RESTART_AN_MASK BIT(9)
-#define TSE_PCS_CTRL_AUTONEG_SGMII 0x1140
-#define TSE_PCS_IF_MODE_REG 0x28
-#define TSE_PCS_LINK_TIMER_0_REG 0x24
-#define TSE_PCS_LINK_TIMER_1_REG 0x26
-#define TSE_PCS_SIZE 0x40
-#define TSE_PCS_STATUS_AN_COMPLETED_MASK BIT(5)
-#define TSE_PCS_STATUS_LINK_MASK 0x0004
-#define TSE_PCS_STATUS_REG 0x02
-#define TSE_PCS_SGMII_SPEED_1000 BIT(3)
-#define TSE_PCS_SGMII_SPEED_100 BIT(2)
-#define TSE_PCS_SGMII_SPEED_10 0x0
-#define TSE_PCS_SW_RST_MASK 0x8000
-#define TSE_PCS_PARTNER_ABILITY_REG 0x0A
-#define TSE_PCS_PARTNER_DUPLEX_FULL 0x1000
-#define TSE_PCS_PARTNER_DUPLEX_HALF 0x0000
-#define TSE_PCS_PARTNER_DUPLEX_MASK 0x1000
-#define TSE_PCS_PARTNER_SPEED_MASK GENMASK(11, 10)
-#define TSE_PCS_PARTNER_SPEED_1000 BIT(11)
-#define TSE_PCS_PARTNER_SPEED_100 BIT(10)
-#define TSE_PCS_PARTNER_SPEED_10 0x0000
-#define TSE_PCS_PARTNER_SPEED_1000 BIT(11)
-#define TSE_PCS_PARTNER_SPEED_100 BIT(10)
-#define TSE_PCS_PARTNER_SPEED_10 0x0000
-#define TSE_PCS_SGMII_SPEED_MASK GENMASK(3, 2)
-#define TSE_PCS_SGMII_LINK_TIMER_0 0x0D40
-#define TSE_PCS_SGMII_LINK_TIMER_1 0x0003
-#define TSE_PCS_SW_RESET_TIMEOUT 100
-#define TSE_PCS_USE_SGMII_AN_MASK BIT(1)
-#define TSE_PCS_USE_SGMII_ENA BIT(0)
-#define TSE_PCS_IF_USE_SGMII 0x03
-
-#define AUTONEGO_LINK_TIMER 20
-
-static int tse_pcs_reset(void __iomem *base, struct tse_pcs *pcs)
-{
- int counter = 0;
- u16 val;
-
- val = readw(base + TSE_PCS_CONTROL_REG);
- val |= TSE_PCS_SW_RST_MASK;
- writew(val, base + TSE_PCS_CONTROL_REG);
-
- while (counter < TSE_PCS_SW_RESET_TIMEOUT) {
- val = readw(base + TSE_PCS_CONTROL_REG);
- val &= TSE_PCS_SW_RST_MASK;
- if (val == 0)
- break;
- counter++;
- udelay(1);
- }
- if (counter >= TSE_PCS_SW_RESET_TIMEOUT) {
- dev_err(pcs->dev, "PCS could not get out of sw reset\n");
- return -ETIMEDOUT;
- }
-
- return 0;
-}
-
-int tse_pcs_init(void __iomem *base, struct tse_pcs *pcs)
-{
- int ret = 0;
-
- writew(TSE_PCS_IF_USE_SGMII, base + TSE_PCS_IF_MODE_REG);
-
- writew(TSE_PCS_CTRL_AUTONEG_SGMII, base + TSE_PCS_CONTROL_REG);
-
- writew(TSE_PCS_SGMII_LINK_TIMER_0, base + TSE_PCS_LINK_TIMER_0_REG);
- writew(TSE_PCS_SGMII_LINK_TIMER_1, base + TSE_PCS_LINK_TIMER_1_REG);
-
- ret = tse_pcs_reset(base, pcs);
- if (ret == 0)
- writew(SGMII_ADAPTER_ENABLE,
- pcs->sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
-
- return ret;
-}
-
-static void pcs_link_timer_callback(struct tse_pcs *pcs)
-{
- u16 val = 0;
- void __iomem *tse_pcs_base = pcs->tse_pcs_base;
- void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;
-
- val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
- val &= TSE_PCS_STATUS_LINK_MASK;
-
- if (val != 0) {
- dev_dbg(pcs->dev, "Adapter: Link is established\n");
- writew(SGMII_ADAPTER_ENABLE,
- sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
- } else {
- mod_timer(&pcs->aneg_link_timer, jiffies +
- msecs_to_jiffies(AUTONEGO_LINK_TIMER));
- }
-}
-
-static void auto_nego_timer_callback(struct tse_pcs *pcs)
-{
- u16 val = 0;
- u16 speed = 0;
- u16 duplex = 0;
- void __iomem *tse_pcs_base = pcs->tse_pcs_base;
- void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;
-
- val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
- val &= TSE_PCS_STATUS_AN_COMPLETED_MASK;
-
- if (val != 0) {
- dev_dbg(pcs->dev, "Adapter: Auto Negotiation is completed\n");
- val = readw(tse_pcs_base + TSE_PCS_PARTNER_ABILITY_REG);
- speed = val & TSE_PCS_PARTNER_SPEED_MASK;
- duplex = val & TSE_PCS_PARTNER_DUPLEX_MASK;
-
- if (speed == TSE_PCS_PARTNER_SPEED_10 &&
- duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
- dev_dbg(pcs->dev,
- "Adapter: Link Partner is Up - 10/Full\n");
- else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
- duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
- dev_dbg(pcs->dev,
- "Adapter: Link Partner is Up - 100/Full\n");
- else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
- duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
- dev_dbg(pcs->dev,
- "Adapter: Link Partner is Up - 1000/Full\n");
- else if (speed == TSE_PCS_PARTNER_SPEED_10 &&
- duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
- dev_err(pcs->dev,
- "Adapter does not support Half Duplex\n");
- else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
- duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
- dev_err(pcs->dev,
- "Adapter does not support Half Duplex\n");
- else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
- duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
- dev_err(pcs->dev,
- "Adapter does not support Half Duplex\n");
- else
- dev_err(pcs->dev,
- "Adapter: Invalid Partner Speed and Duplex\n");
-
- if (duplex == TSE_PCS_PARTNER_DUPLEX_FULL &&
- (speed == TSE_PCS_PARTNER_SPEED_10 ||
- speed == TSE_PCS_PARTNER_SPEED_100 ||
- speed == TSE_PCS_PARTNER_SPEED_1000))
- writew(SGMII_ADAPTER_ENABLE,
- sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
- } else {
- val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
- val |= TSE_PCS_CONTROL_RESTART_AN_MASK;
- writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);
-
- tse_pcs_reset(tse_pcs_base, pcs);
- mod_timer(&pcs->aneg_link_timer, jiffies +
- msecs_to_jiffies(AUTONEGO_LINK_TIMER));
- }
-}
-
-static void aneg_link_timer_callback(struct timer_list *t)
-{
- struct tse_pcs *pcs = from_timer(pcs, t, aneg_link_timer);
-
- if (pcs->autoneg == AUTONEG_ENABLE)
- auto_nego_timer_callback(pcs);
- else if (pcs->autoneg == AUTONEG_DISABLE)
- pcs_link_timer_callback(pcs);
-}
-
-void tse_pcs_fix_mac_speed(struct tse_pcs *pcs, struct phy_device *phy_dev,
- unsigned int speed)
-{
- void __iomem *tse_pcs_base = pcs->tse_pcs_base;
- u32 val;
-
- pcs->autoneg = phy_dev->autoneg;
-
- if (phy_dev->autoneg == AUTONEG_ENABLE) {
- val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
- val |= TSE_PCS_CONTROL_AN_EN_MASK;
- writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);
-
- val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
- val |= TSE_PCS_USE_SGMII_AN_MASK;
- writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);
-
- val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
- val |= TSE_PCS_CONTROL_RESTART_AN_MASK;
-
- tse_pcs_reset(tse_pcs_base, pcs);
-
- timer_setup(&pcs->aneg_link_timer, aneg_link_timer_callback,
- 0);
- mod_timer(&pcs->aneg_link_timer, jiffies +
- msecs_to_jiffies(AUTONEGO_LINK_TIMER));
- } else if (phy_dev->autoneg == AUTONEG_DISABLE) {
- val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
- val &= ~TSE_PCS_CONTROL_AN_EN_MASK;
- writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);
-
- val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
- val &= ~TSE_PCS_USE_SGMII_AN_MASK;
- writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);
-
- val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
- val &= ~TSE_PCS_SGMII_SPEED_MASK;
-
- switch (speed) {
- case 1000:
- val |= TSE_PCS_SGMII_SPEED_1000;
- break;
- case 100:
- val |= TSE_PCS_SGMII_SPEED_100;
- break;
- case 10:
- val |= TSE_PCS_SGMII_SPEED_10;
- break;
- default:
- return;
- }
- writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);
-
- tse_pcs_reset(tse_pcs_base, pcs);
-
- timer_setup(&pcs->aneg_link_timer, aneg_link_timer_callback,
- 0);
- mod_timer(&pcs->aneg_link_timer, jiffies +
- msecs_to_jiffies(AUTONEGO_LINK_TIMER));
- }
-}
diff --git a/drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h b/drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h
deleted file mode 100644
index 694ac25ef426..000000000000
--- a/drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/* Copyright Altera Corporation (C) 2016. All rights reserved.
- *
- * Author: Tien Hock Loh <thloh@altera.com>
- */
-
-#ifndef __TSE_PCS_H__
-#define __TSE_PCS_H__
-
-#include <linux/phy.h>
-#include <linux/timer.h>
-
-#define SGMII_ADAPTER_CTRL_REG 0x00
-#define SGMII_ADAPTER_ENABLE 0x0000
-#define SGMII_ADAPTER_DISABLE 0x0001
-
-struct tse_pcs {
- struct device *dev;
- void __iomem *tse_pcs_base;
- void __iomem *sgmii_adapter_base;
- struct timer_list aneg_link_timer;
- int autoneg;
-};
-
-int tse_pcs_init(void __iomem *base, struct tse_pcs *pcs);
-void tse_pcs_fix_mac_speed(struct tse_pcs *pcs, struct phy_device *phy_dev,
- unsigned int speed);
-
-#endif /* __TSE_PCS_H__ */
diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index 4ad692c4116c..52c5ec553276 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -16,6 +16,7 @@
#include <linux/stmmac.h>
#include <linux/phy.h>
#include <linux/pcs/pcs-xpcs.h>
+#include <linux/pcs-lynx.h>
#include <linux/module.h>
#if IS_ENABLED(CONFIG_VLAN_8021Q)
#define STMMAC_VLAN_TAG_USED
@@ -519,6 +520,7 @@ struct mac_device_info {
const struct stmmac_tc_ops *tc;
const struct stmmac_mmc_ops *mmc;
struct dw_xpcs *xpcs;
+ struct phylink_pcs *lynx_pcs; /* Lynx external PCS */
struct mii_regs mii; /* MII register Addresses */
struct mac_link link;
void __iomem *pcsr; /* vpointer to device CSRs */
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 6ee050300b31..e399fccbafe5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -10,14 +10,13 @@
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/regmap.h>
+#include <linux/mdio/mdio-regmap.h>
#include <linux/reset.h>
#include <linux/stmmac.h>

#include "stmmac.h"
#include "stmmac_platform.h"

-#include "altr_tse_pcs.h"
-
#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0x0
#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII 0x1
#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
@@ -37,6 +36,10 @@
#define EMAC_SPLITTER_CTRL_SPEED_100 0x3
#define EMAC_SPLITTER_CTRL_SPEED_1000 0x0

+#define SGMII_ADAPTER_CTRL_REG 0x00
+#define SGMII_ADAPTER_ENABLE 0x0000
+#define SGMII_ADAPTER_DISABLE 0x0001
+
struct socfpga_dwmac;
struct socfpga_dwmac_ops {
int (*set_phy_mode)(struct socfpga_dwmac *dwmac_priv);
@@ -50,16 +53,18 @@ struct socfpga_dwmac {
struct reset_control *stmmac_rst;
struct reset_control *stmmac_ocp_rst;
void __iomem *splitter_base;
+ void __iomem *tse_pcs_base;
+ void __iomem *sgmii_adapter_base;
bool f2h_ptp_ref_clk;
- struct tse_pcs pcs;
const struct socfpga_dwmac_ops *ops;
+ struct mdio_device *pcs_mdiodev;
};

static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
{
struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)priv;
void __iomem *splitter_base = dwmac->splitter_base;
- void __iomem *sgmii_adapter_base = dwmac->pcs.sgmii_adapter_base;
+ void __iomem *sgmii_adapter_base = dwmac->sgmii_adapter_base;
struct device *dev = dwmac->dev;
struct net_device *ndev = dev_get_drvdata(dev);
struct phy_device *phy_dev = ndev->phydev;
@@ -89,11 +94,9 @@ static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
writel(val, splitter_base + EMAC_SPLITTER_CTRL_REG);
}

- if (phy_dev && sgmii_adapter_base) {
+ if (phy_dev && sgmii_adapter_base)
writew(SGMII_ADAPTER_ENABLE,
sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
- tse_pcs_fix_mac_speed(&dwmac->pcs, phy_dev, speed);
- }
}

static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)
@@ -183,11 +186,11 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
goto err_node_put;
}

- dwmac->pcs.sgmii_adapter_base =
+ dwmac->sgmii_adapter_base =
devm_ioremap_resource(dev, &res_sgmii_adapter);

- if (IS_ERR(dwmac->pcs.sgmii_adapter_base)) {
- ret = PTR_ERR(dwmac->pcs.sgmii_adapter_base);
+ if (IS_ERR(dwmac->sgmii_adapter_base)) {
+ ret = PTR_ERR(dwmac->sgmii_adapter_base);
goto err_node_put;
}
}
@@ -205,11 +208,11 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
goto err_node_put;
}

- dwmac->pcs.tse_pcs_base =
+ dwmac->tse_pcs_base =
devm_ioremap_resource(dev, &res_tse_pcs);

- if (IS_ERR(dwmac->pcs.tse_pcs_base)) {
- ret = PTR_ERR(dwmac->pcs.tse_pcs_base);
+ if (IS_ERR(dwmac->tse_pcs_base)) {
+ ret = PTR_ERR(dwmac->tse_pcs_base);
goto err_node_put;
}
}
@@ -235,6 +238,13 @@ static int socfpga_get_plat_phymode(struct socfpga_dwmac *dwmac)
return priv->plat->interface;
}

+static void socfpga_sgmii_config(struct socfpga_dwmac *dwmac, bool enable)
+{
+ u16 val = enable ? SGMII_ADAPTER_ENABLE : SGMII_ADAPTER_DISABLE;
+
+ writew(val, dwmac->sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
+}
+
static int socfpga_set_phy_mode_common(int phymode, u32 *val)
{
switch (phymode) {
@@ -310,12 +320,8 @@ static int socfpga_gen5_set_phy_mode(struct socfpga_dwmac *dwmac)
*/
reset_control_deassert(dwmac->stmmac_ocp_rst);
reset_control_deassert(dwmac->stmmac_rst);
- if (phymode == PHY_INTERFACE_MODE_SGMII) {
- if (tse_pcs_init(dwmac->pcs.tse_pcs_base, &dwmac->pcs) != 0) {
- dev_err(dwmac->dev, "Unable to initialize TSE PCS");
- return -EINVAL;
- }
- }
+ if (phymode == PHY_INTERFACE_MODE_SGMII)
+ socfpga_sgmii_config(dwmac, true);

return 0;
}
@@ -367,12 +373,8 @@ static int socfpga_gen10_set_phy_mode(struct socfpga_dwmac *dwmac)
*/
reset_control_deassert(dwmac->stmmac_ocp_rst);
reset_control_deassert(dwmac->stmmac_rst);
- if (phymode == PHY_INTERFACE_MODE_SGMII) {
- if (tse_pcs_init(dwmac->pcs.tse_pcs_base, &dwmac->pcs) != 0) {
- dev_err(dwmac->dev, "Unable to initialize TSE PCS");
- return -EINVAL;
- }
- }
+ if (phymode == PHY_INTERFACE_MODE_SGMII)
+ socfpga_sgmii_config(dwmac, true);
return 0;
}

@@ -386,6 +388,7 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
struct net_device *ndev;
struct stmmac_priv *stpriv;
const struct socfpga_dwmac_ops *ops;
+ struct regmap_config pcs_regmap_cfg;

ops = device_get_match_data(&pdev->dev);
if (!ops) {
@@ -443,6 +446,44 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
if (ret)
goto err_dvr_remove;

+ memset(&pcs_regmap_cfg, 0, sizeof(pcs_regmap_cfg));
+ pcs_regmap_cfg.reg_bits = 16;
+ pcs_regmap_cfg.val_bits = 16;
+ pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(1);
+
+ /* Create a regmap for the PCS so that it can be used by the PCS driver,
+ * if we have such a PCS
+ */
+ if (dwmac->tse_pcs_base) {
+ struct mdio_regmap_config mrc;
+ struct regmap *pcs_regmap;
+ struct mii_bus *pcs_bus;
+
+ pcs_regmap = devm_regmap_init_mmio(&pdev->dev, dwmac->tse_pcs_base,
+ &pcs_regmap_cfg);
+ if (IS_ERR(pcs_regmap)) {
+ ret = PTR_ERR(pcs_regmap);
+ goto err_dvr_remove;
+ }
+
+ mrc.regmap = pcs_regmap;
+ mrc.parent = &pdev->dev;
+ mrc.valid_addr = 0x0;
+
+ snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-pcs-mii", ndev->name);
+ pcs_bus = devm_mdio_regmap_register(&pdev->dev, &mrc);
+ if (IS_ERR(pcs_bus)) {
+ ret = PTR_ERR(pcs_bus);
+ goto err_dvr_remove;
+ }
+
+ stpriv->hw->lynx_pcs = lynx_pcs_create_mdiodev(pcs_bus, 0);
+ if (IS_ERR(stpriv->hw->lynx_pcs)) {
+ ret = PTR_ERR(stpriv->hw->lynx_pcs);
+ goto err_dvr_remove;
+ }
+ }
+
return 0;

err_dvr_remove:
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 0fca81507a77..cff76e215f7d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -937,10 +937,13 @@ static struct phylink_pcs *stmmac_mac_select_pcs(struct phylink_config *config,
{
struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));

- if (!priv->hw->xpcs)
- return NULL;
+ if (priv->hw->xpcs)
+ return &priv->hw->xpcs->pcs;
+
+ if (priv->hw->lynx_pcs)
+ return priv->hw->lynx_pcs;

- return &priv->hw->xpcs->pcs;
+ return NULL;
}

static void stmmac_mac_config(struct phylink_config *config, unsigned int mode,
@@ -3813,7 +3816,8 @@ static int __stmmac_open(struct net_device *dev,
if (priv->hw->pcs != STMMAC_PCS_TBI &&
priv->hw->pcs != STMMAC_PCS_RTBI &&
(!priv->hw->xpcs ||
- xpcs_get_an_mode(priv->hw->xpcs, mode) != DW_AN_C73)) {
+ xpcs_get_an_mode(priv->hw->xpcs, mode) != DW_AN_C73) &&
+ !priv->hw->lynx_pcs) {
ret = stmmac_init_phy(dev);
if (ret) {
netdev_err(priv->dev,
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 3db1cb0fd160..c784a6731f08 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -665,6 +665,9 @@ int stmmac_mdio_unregister(struct net_device *ndev)
if (priv->hw->xpcs)
xpcs_destroy(priv->hw->xpcs);

+ if (priv->hw->lynx_pcs)
+ lynx_pcs_destroy(priv->hw->lynx_pcs);
+
mdiobus_unregister(priv->mii);
priv->mii->priv = NULL;
mdiobus_free(priv->mii);
--
2.40.1