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Subject[Patch net-next v14 11/13] net: dsa: microchip: lan937x: add phylink_mac_link_up support
Date
This patch add support for phylink_mac_link_up. It configures the mac
for the speed, flow control and duplex mode.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
drivers/net/dsa/microchip/ksz_common.c | 16 ++++++
drivers/net/dsa/microchip/ksz_common.h | 5 ++
drivers/net/dsa/microchip/lan937x.h | 4 ++
drivers/net/dsa/microchip/lan937x_main.c | 67 ++++++++++++++++++++++++
drivers/net/dsa/microchip/lan937x_reg.h | 11 ++++
5 files changed, 103 insertions(+)

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index ca7ca327285d..9972b2fabf27 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -221,6 +221,7 @@ static const struct ksz_dev_ops lan937x_dev_ops = {
.mirror_add = ksz9477_port_mirror_add,
.mirror_del = ksz9477_port_mirror_del,
.get_caps = lan937x_phylink_get_caps,
+ .phylink_mac_link_up = lan937x_phylink_mac_link_up,
.fdb_dump = ksz9477_fdb_dump,
.fdb_add = ksz9477_fdb_add,
.fdb_del = ksz9477_fdb_del,
@@ -1340,6 +1341,20 @@ static int ksz_max_mtu(struct dsa_switch *ds, int port)
return dev->dev_ops->max_mtu(dev, port);
}

+static void ksz_phylink_mac_link_up(struct dsa_switch *ds, int port,
+ unsigned int mode,
+ phy_interface_t interface,
+ struct phy_device *phydev, int speed,
+ int duplex, bool tx_pause, bool rx_pause)
+{
+ struct ksz_device *dev = ds->priv;
+
+ if (dev->dev_ops->phylink_mac_link_up)
+ dev->dev_ops->phylink_mac_link_up(dev, port, mode, interface,
+ phydev, speed, duplex,
+ tx_pause, rx_pause);
+}
+
static int ksz_switch_detect(struct ksz_device *dev)
{
u8 id1, id2;
@@ -1413,6 +1428,7 @@ static const struct dsa_switch_ops ksz_switch_ops = {
.phy_read = ksz_phy_read16,
.phy_write = ksz_phy_write16,
.phylink_get_caps = ksz_phylink_get_caps,
+ .phylink_mac_link_up = ksz_phylink_mac_link_up,
.phylink_mac_link_down = ksz_mac_link_down,
.port_enable = ksz_enable_port,
.get_strings = ksz_get_strings,
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index bf4f3f3922a5..f449feab5499 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -271,6 +271,11 @@ struct ksz_dev_ops {
int (*max_mtu)(struct ksz_device *dev, int port);
void (*freeze_mib)(struct ksz_device *dev, int port, bool freeze);
void (*port_init_cnt)(struct ksz_device *dev, int port);
+ void (*phylink_mac_link_up)(struct ksz_device *dev, int port,
+ unsigned int mode,
+ phy_interface_t interface,
+ struct phy_device *phydev, int speed,
+ int duplex, bool tx_pause, bool rx_pause);
void (*config_cpu_port)(struct dsa_switch *ds);
int (*enable_stp_addr)(struct ksz_device *dev);
int (*reset)(struct ksz_device *dev);
diff --git a/drivers/net/dsa/microchip/lan937x.h b/drivers/net/dsa/microchip/lan937x.h
index d4207e97a130..145770aec963 100644
--- a/drivers/net/dsa/microchip/lan937x.h
+++ b/drivers/net/dsa/microchip/lan937x.h
@@ -17,4 +17,8 @@ void lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu);
void lan937x_phylink_get_caps(struct ksz_device *dev, int port,
struct phylink_config *config);
+void lan937x_phylink_mac_link_up(struct ksz_device *dev, int port,
+ unsigned int mode, phy_interface_t interface,
+ struct phy_device *phydev, int speed,
+ int duplex, bool tx_pause, bool rx_pause);
#endif
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index 8cb46caf5340..95700e0233de 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -312,6 +312,60 @@ int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu)
return 0;
}

+static void lan937x_config_gbit(struct ksz_device *dev, bool gbit, u8 *data)
+{
+ if (gbit)
+ *data &= ~PORT_MII_NOT_1GBIT;
+ else
+ *data |= PORT_MII_NOT_1GBIT;
+}
+
+static void lan937x_config_interface(struct ksz_device *dev, int port,
+ int speed, int duplex,
+ bool tx_pause, bool rx_pause)
+{
+ u8 xmii_ctrl0, xmii_ctrl1;
+
+ ksz_pread8(dev, port, REG_PORT_XMII_CTRL_0, &xmii_ctrl0);
+ ksz_pread8(dev, port, REG_PORT_XMII_CTRL_1, &xmii_ctrl1);
+
+ switch (speed) {
+ case SPEED_1000:
+ lan937x_config_gbit(dev, true, &xmii_ctrl1);
+ break;
+ case SPEED_100:
+ lan937x_config_gbit(dev, false, &xmii_ctrl1);
+ xmii_ctrl0 |= PORT_MII_100MBIT;
+ break;
+ case SPEED_10:
+ lan937x_config_gbit(dev, false, &xmii_ctrl1);
+ xmii_ctrl0 &= ~PORT_MII_100MBIT;
+ break;
+ default:
+ dev_err(dev->dev, "Unsupported speed on port %d: %d\n",
+ port, speed);
+ return;
+ }
+
+ if (duplex)
+ xmii_ctrl0 |= PORT_MII_FULL_DUPLEX;
+ else
+ xmii_ctrl0 &= ~PORT_MII_FULL_DUPLEX;
+
+ if (tx_pause)
+ xmii_ctrl0 |= PORT_MII_TX_FLOW_CTRL;
+ else
+ xmii_ctrl1 &= ~PORT_MII_TX_FLOW_CTRL;
+
+ if (rx_pause)
+ xmii_ctrl0 |= PORT_MII_RX_FLOW_CTRL;
+ else
+ xmii_ctrl0 &= ~PORT_MII_RX_FLOW_CTRL;
+
+ ksz_pwrite8(dev, port, REG_PORT_XMII_CTRL_0, xmii_ctrl0);
+ ksz_pwrite8(dev, port, REG_PORT_XMII_CTRL_1, xmii_ctrl1);
+}
+
void lan937x_phylink_get_caps(struct ksz_device *dev, int port,
struct phylink_config *config)
{
@@ -324,6 +378,19 @@ void lan937x_phylink_get_caps(struct ksz_device *dev, int port,
}
}

+void lan937x_phylink_mac_link_up(struct ksz_device *dev, int port,
+ unsigned int mode, phy_interface_t interface,
+ struct phy_device *phydev, int speed,
+ int duplex, bool tx_pause, bool rx_pause)
+{
+ /* Internal PHYs */
+ if (dev->info->internal_phy[port])
+ return;
+
+ lan937x_config_interface(dev, port, speed, duplex,
+ tx_pause, rx_pause);
+}
+
int lan937x_setup(struct dsa_switch *ds)
{
struct ksz_device *dev = ds->priv;
diff --git a/drivers/net/dsa/microchip/lan937x_reg.h b/drivers/net/dsa/microchip/lan937x_reg.h
index 19f3aa344228..c187d0a3e7fa 100644
--- a/drivers/net/dsa/microchip/lan937x_reg.h
+++ b/drivers/net/dsa/microchip/lan937x_reg.h
@@ -139,6 +139,17 @@
#define PORT_MII_RX_FLOW_CTRL BIT(3)
#define PORT_GRXC_ENABLE BIT(0)

+#define REG_PORT_XMII_CTRL_1 0x0301
+#define PORT_MII_NOT_1GBIT BIT(6)
+#define PORT_MII_SEL_EDGE BIT(5)
+#define PORT_RGMII_ID_IG_ENABLE BIT(4)
+#define PORT_RGMII_ID_EG_ENABLE BIT(3)
+#define PORT_MII_MAC_MODE BIT(2)
+#define PORT_MII_SEL_M 0x3
+#define PORT_RGMII_SEL 0x0
+#define PORT_RMII_SEL 0x1
+#define PORT_MII_SEL 0x2
+
/* 4 - MAC */
#define REG_PORT_MAC_CTRL_0 0x0400
#define PORT_CHECK_LENGTH BIT(2)
--
2.36.1
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