[PATCH net-next v4 11/11] net: mscc: ocelot: make use of SerDes PHYs for handling their configuration
From: Quentin Schulz
Date: Thu Oct 04 2018 - 08:23:08 EST
Previously, the SerDes muxing was hardcoded to a given mode in the MAC
controller driver. Now, the SerDes muxing is configured within the
Device Tree and is enforced in the MAC controller driver so we can have
a lot of different SerDes configurations.
Make use of the SerDes PHYs in the MAC controller to set up the SerDes
according to the SerDes<->switch port mapping and the communication mode
with the Ethernet PHY.
Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxx>
---
drivers/net/ethernet/mscc/Kconfig | 2 +
drivers/net/ethernet/mscc/ocelot.c | 16 +++++++-
drivers/net/ethernet/mscc/ocelot.h | 6 ++-
drivers/net/ethernet/mscc/ocelot_board.c | 50 +++++++++++++++++++-----
drivers/net/ethernet/mscc/ocelot_regs.c | 1 +
5 files changed, 63 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/mscc/Kconfig b/drivers/net/ethernet/mscc/Kconfig
index 36c84625d54e..bcec0587cf61 100644
--- a/drivers/net/ethernet/mscc/Kconfig
+++ b/drivers/net/ethernet/mscc/Kconfig
@@ -23,6 +23,8 @@ config MSCC_OCELOT_SWITCH
config MSCC_OCELOT_SWITCH_OCELOT
tristate "Ocelot switch driver on Ocelot"
depends on MSCC_OCELOT_SWITCH
+ depends on GENERIC_PHY
+ depends on OF_NET
help
This driver supports the Ocelot network switch device as present on
the Ocelot SoCs.
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 1a4f2bb48ead..8f11fdba8d0e 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -472,6 +472,7 @@ static int ocelot_port_open(struct net_device *dev)
{
struct ocelot_port *port = netdev_priv(dev);
struct ocelot *ocelot = port->ocelot;
+ enum phy_mode phy_mode;
int err;
/* Enable receiving frames on the port, and activate auto-learning of
@@ -482,8 +483,21 @@ static int ocelot_port_open(struct net_device *dev)
ANA_PORT_PORT_CFG_PORTID_VAL(port->chip_port),
ANA_PORT_PORT_CFG, port->chip_port);
+ if (port->serdes) {
+ if (port->phy_mode == PHY_INTERFACE_MODE_SGMII)
+ phy_mode = PHY_MODE_SGMII;
+ else
+ phy_mode = PHY_MODE_QSGMII;
+
+ err = phy_set_mode(port->serdes, phy_mode);
+ if (err) {
+ netdev_err(dev, "Could not set mode of SerDes\n");
+ return err;
+ }
+ }
+
err = phy_connect_direct(dev, port->phy, &ocelot_port_adjust_link,
- PHY_INTERFACE_MODE_NA);
+ port->phy_mode);
if (err) {
netdev_err(dev, "Could not attach to PHY\n");
return err;
diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc/ocelot.h
index ff0e3a5d7487..62c7c8eb00d9 100644
--- a/drivers/net/ethernet/mscc/ocelot.h
+++ b/drivers/net/ethernet/mscc/ocelot.h
@@ -11,9 +11,10 @@
#include <linux/bitops.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
+#include <linux/phy.h>
+#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
-#include <soc/mscc/ocelot_hsio.h>
#include "ocelot_ana.h"
#include "ocelot_dev.h"
@@ -454,6 +455,9 @@ struct ocelot_port {
u8 vlan_aware;
u64 *stats;
+
+ phy_interface_t phy_mode;
+ struct phy *serdes;
};
u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset);
diff --git a/drivers/net/ethernet/mscc/ocelot_board.c b/drivers/net/ethernet/mscc/ocelot_board.c
index dca205e0ef75..953b32677383 100644
--- a/drivers/net/ethernet/mscc/ocelot_board.c
+++ b/drivers/net/ethernet/mscc/ocelot_board.c
@@ -6,6 +6,7 @@
*/
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/of_net.h>
#include <linux/netdevice.h>
#include <linux/of_mdio.h>
#include <linux/of_platform.h>
@@ -253,18 +254,12 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&ocelot->multicast);
ocelot_init(ocelot);
- ocelot_rmw(ocelot, HSIO_HW_CFG_DEV1G_4_MODE |
- HSIO_HW_CFG_DEV1G_6_MODE |
- HSIO_HW_CFG_DEV1G_9_MODE,
- HSIO_HW_CFG_DEV1G_4_MODE |
- HSIO_HW_CFG_DEV1G_6_MODE |
- HSIO_HW_CFG_DEV1G_9_MODE,
- HSIO_HW_CFG);
-
for_each_available_child_of_node(ports, portnp) {
struct device_node *phy_node;
struct phy_device *phy;
struct resource *res;
+ struct phy *serdes;
+ enum phy_mode phy_mode;
void __iomem *regs;
char res_name[8];
u32 port;
@@ -289,10 +284,45 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
continue;
err = ocelot_probe_port(ocelot, port, regs, phy);
- if (err) {
- dev_err(&pdev->dev, "failed to probe ports\n");
+ if (err)
+ return err;
+
+ err = of_get_phy_mode(portnp);
+ if (err < 0)
+ ocelot->ports[port]->phy_mode = PHY_INTERFACE_MODE_NA;
+ else
+ ocelot->ports[port]->phy_mode = err;
+
+ switch (ocelot->ports[port]->phy_mode) {
+ case PHY_INTERFACE_MODE_NA:
+ continue;
+ case PHY_INTERFACE_MODE_SGMII:
+ phy_mode = PHY_MODE_SGMII;
+ break;
+ case PHY_INTERFACE_MODE_QSGMII:
+ phy_mode = PHY_MODE_QSGMII;
+ break;
+ default:
+ dev_err(ocelot->dev,
+ "invalid phy mode for port%d, (Q)SGMII only\n",
+ port);
+ return -EINVAL;
+ }
+
+ serdes = devm_of_phy_get(ocelot->dev, portnp, NULL);
+ if (IS_ERR(serdes)) {
+ err = PTR_ERR(serdes);
+ if (err == -EPROBE_DEFER)
+ dev_dbg(ocelot->dev, "deferring probe\n");
+ else
+ dev_err(ocelot->dev,
+ "missing SerDes phys for port%d\n",
+ port);
+
goto err_probe_ports;
}
+
+ ocelot->ports[port]->serdes = serdes;
}
register_netdevice_notifier(&ocelot_netdevice_nb);
diff --git a/drivers/net/ethernet/mscc/ocelot_regs.c b/drivers/net/ethernet/mscc/ocelot_regs.c
index 2518ce0fe265..9271af18b93b 100644
--- a/drivers/net/ethernet/mscc/ocelot_regs.c
+++ b/drivers/net/ethernet/mscc/ocelot_regs.c
@@ -5,6 +5,7 @@
* Copyright (c) 2017 Microsemi Corporation
*/
#include "ocelot.h"
+#include <soc/mscc/ocelot_hsio.h>
static const u32 ocelot_ana_regmap[] = {
REG(ANA_ADVLEARN, 0x009000),
--
2.17.1