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Subject[PATCH v2] net: dsa: ksz8795: adjust CPU link to host interface
Date
Add support for RGMII in 100 and 1000 Mbps.

Adjust the CPU port settings from the host interface settings: interface
MII type, speed, duplex.

Signed-off-by: Jean Pihet <jean.pihet@newoldbits.com>
---
drivers/net/dsa/microchip/ksz8795.c | 93 ++++++++++++++++++-----------
1 file changed, 57 insertions(+), 36 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index 1e101ab56cea..e76390bba3a0 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -916,10 +916,53 @@ static void ksz8795_port_mirror_del(struct dsa_switch *ds, int port,
PORT_MIRROR_SNIFFER, false);
}

+static void ksz8795_mii_config(struct ksz_device *dev, struct ksz_port *p)
+{
+ u8 data8;
+
+ /* Configure MII interface for proper network communication. */
+ ksz_read8(dev, REG_PORT_5_CTRL_6, &data8);
+ data8 &= ~PORT_INTERFACE_TYPE;
+ data8 &= ~PORT_GMII_1GPS_MODE;
+ switch (p->interface) {
+ case PHY_INTERFACE_MODE_MII:
+ p->phydev.speed = SPEED_100;
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ data8 |= PORT_INTERFACE_RMII;
+ p->phydev.speed = SPEED_100;
+ break;
+ case PHY_INTERFACE_MODE_GMII:
+ data8 |= PORT_GMII_1GPS_MODE;
+ data8 |= PORT_INTERFACE_GMII;
+ p->phydev.speed = SPEED_1000;
+ break;
+ default:
+ data8 &= ~PORT_RGMII_ID_IN_ENABLE;
+ data8 &= ~PORT_RGMII_ID_OUT_ENABLE;
+ if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+ p->interface == PHY_INTERFACE_MODE_RGMII_RXID)
+ data8 |= PORT_RGMII_ID_IN_ENABLE;
+ if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+ p->interface == PHY_INTERFACE_MODE_RGMII_TXID)
+ data8 |= PORT_RGMII_ID_OUT_ENABLE;
+ /* Support RGMII in 100 and 1000 Mbps */
+ if (p->phydev.speed == SPEED_1000) {
+ data8 |= PORT_GMII_1GPS_MODE;
+ } else {
+ p->phydev.speed = SPEED_100;
+ }
+ data8 |= PORT_INTERFACE_RGMII;
+ break;
+ }
+ ksz_write8(dev, REG_PORT_5_CTRL_6, data8);
+ p->phydev.duplex = 1;
+}
+
static void ksz8795_port_setup(struct ksz_device *dev, int port, bool cpu_port)
{
struct ksz_port *p = &dev->ports[port];
- u8 data8, member;
+ u8 member;

/* enable broadcast storm limit */
ksz_port_cfg(dev, port, P_BCAST_STORM_CTRL, PORT_BROADCAST_STORM, true);
@@ -943,41 +986,7 @@ static void ksz8795_port_setup(struct ksz_device *dev, int port, bool cpu_port)
port);
p->interface = dev->compat_interface;
}
-
- /* Configure MII interface for proper network communication. */
- ksz_read8(dev, REG_PORT_5_CTRL_6, &data8);
- data8 &= ~PORT_INTERFACE_TYPE;
- data8 &= ~PORT_GMII_1GPS_MODE;
- switch (p->interface) {
- case PHY_INTERFACE_MODE_MII:
- p->phydev.speed = SPEED_100;
- break;
- case PHY_INTERFACE_MODE_RMII:
- data8 |= PORT_INTERFACE_RMII;
- p->phydev.speed = SPEED_100;
- break;
- case PHY_INTERFACE_MODE_GMII:
- data8 |= PORT_GMII_1GPS_MODE;
- data8 |= PORT_INTERFACE_GMII;
- p->phydev.speed = SPEED_1000;
- break;
- default:
- data8 &= ~PORT_RGMII_ID_IN_ENABLE;
- data8 &= ~PORT_RGMII_ID_OUT_ENABLE;
- if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
- p->interface == PHY_INTERFACE_MODE_RGMII_RXID)
- data8 |= PORT_RGMII_ID_IN_ENABLE;
- if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
- p->interface == PHY_INTERFACE_MODE_RGMII_TXID)
- data8 |= PORT_RGMII_ID_OUT_ENABLE;
- data8 |= PORT_GMII_1GPS_MODE;
- data8 |= PORT_INTERFACE_RGMII;
- p->phydev.speed = SPEED_1000;
- break;
- }
- ksz_write8(dev, REG_PORT_5_CTRL_6, data8);
- p->phydev.duplex = 1;
-
+ ksz8795_mii_config(dev, p);
member = dev->port_mask;
} else {
member = dev->host_mask | p->vid_member;
@@ -1102,11 +1111,23 @@ static int ksz8795_setup(struct dsa_switch *ds)
return 0;
}

+static void ksz8795_adjust_link(struct dsa_switch *ds, int port,
+ struct phy_device *phydev)
+{
+ struct ksz_device *dev = ds->priv;
+ struct ksz_port *p = &dev->ports[port];
+
+ /* Adjust the link interface mode and speed for the CPU port */
+ if (dsa_is_cpu_port(ds, port))
+ ksz8795_mii_config(dev, p);
+}
+
static const struct dsa_switch_ops ksz8795_switch_ops = {
.get_tag_protocol = ksz8795_get_tag_protocol,
.setup = ksz8795_setup,
.phy_read = ksz_phy_read16,
.phy_write = ksz_phy_write16,
+ .adjust_link = ksz8795_adjust_link,
.phylink_mac_link_down = ksz_mac_link_down,
.port_enable = ksz_enable_port,
.get_strings = ksz8795_get_strings,
--
2.26.2
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