From 7f1ae07b51e8b617922b2b73850361eafa17a684 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Fri, 4 Nov 2016 03:23:33 +0100 Subject: net: dsa: mv88e6xxx: add port duplex setter Similarly to port's link, add setter to force port's half duplex, full duplex or let normal duplex detection occurs. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx/port.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'drivers/net/dsa/mv88e6xxx/port.c') diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c index 09e25f975b25..17b54441b0e9 100644 --- a/drivers/net/dsa/mv88e6xxx/port.c +++ b/drivers/net/dsa/mv88e6xxx/port.c @@ -71,6 +71,42 @@ int mv88e6xxx_port_set_link(struct mv88e6xxx_chip *chip, int port, int link) return 0; } +int mv88e6xxx_port_set_duplex(struct mv88e6xxx_chip *chip, int port, int dup) +{ + u16 reg; + int err; + + err = mv88e6xxx_port_read(chip, port, PORT_PCS_CTRL, ®); + if (err) + return err; + + reg &= ~(PORT_PCS_CTRL_FORCE_DUPLEX | PORT_PCS_CTRL_DUPLEX_FULL); + + switch (dup) { + case DUPLEX_HALF: + reg |= PORT_PCS_CTRL_FORCE_DUPLEX; + break; + case DUPLEX_FULL: + reg |= PORT_PCS_CTRL_FORCE_DUPLEX | PORT_PCS_CTRL_DUPLEX_FULL; + break; + case DUPLEX_UNFORCED: + /* normal duplex detection */ + break; + default: + return -EINVAL; + } + + err = mv88e6xxx_port_write(chip, port, PORT_PCS_CTRL, reg); + if (err) + return err; + + netdev_dbg(chip->ds->ports[port].netdev, "%s %s duplex\n", + reg & PORT_PCS_CTRL_FORCE_DUPLEX ? "Force" : "Unforce", + reg & PORT_PCS_CTRL_DUPLEX_FULL ? "full" : "half"); + + return 0; +} + /* Offset 0x04: Port Control Register */ static const char * const mv88e6xxx_port_state_names[] = { -- cgit v1.2.3