net: dsa: mv88e6xxx: Refactor SERDES lane code

The 6390 family has 8 SERDES lanes. What ports use these lanes depends
on how ports 9 and 10 are configured. If 9 and 10 does not make use of
a line, one of the lower ports can use it.

Add a function to return the lane a port is using, if any, and simplify
the code to power up/down the lane.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-08-09 15:38:40 +02:00 committed by David S. Miller
parent 6c422e34b1
commit a8c01c0d94
1 changed files with 126 additions and 93 deletions

View File

@ -174,8 +174,97 @@ int mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
}
/* Return the SERDES lane address a port is using. Ports 9 and 10 can
* use multiple lanes. If so, return the first lane the port uses.
* Returns -ENODEV if a port does not have a lane.
*/
static int mv88e6390_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
u8 cmode_port9, cmode_port10, cmode_port;
int err;
err = mv88e6xxx_port_get_cmode(chip, 9, &cmode_port9);
if (err)
return err;
err = mv88e6xxx_port_get_cmode(chip, 10, &cmode_port10);
if (err)
return err;
err = mv88e6xxx_port_get_cmode(chip, port, &cmode_port);
if (err)
return err;
switch (port) {
case 2:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASE_X)
return MV88E6390_PORT9_LANE1;
return -ENODEV;
case 3:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASE_X)
return MV88E6390_PORT9_LANE2;
return -ENODEV;
case 4:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASE_X)
return MV88E6390_PORT9_LANE3;
return -ENODEV;
case 5:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASE_X)
return MV88E6390_PORT10_LANE1;
return -ENODEV;
case 6:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASE_X)
return MV88E6390_PORT10_LANE2;
return -ENODEV;
case 7:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASE_X)
return MV88E6390_PORT10_LANE3;
return -ENODEV;
case 9:
if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_XAUI ||
cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
return MV88E6390_PORT9_LANE0;
return -ENODEV;
case 10:
if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_XAUI ||
cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
return MV88E6390_PORT10_LANE0;
return -ENODEV;
default:
return -ENODEV;
}
}
/* Set the power on/off for 10GBASE-R and 10GBASE-X4/X2 */
static int mv88e6390_serdes_10g(struct mv88e6xxx_chip *chip, int addr, bool on)
static int mv88e6390_serdes_10g(struct mv88e6xxx_chip *chip, int lane, bool on)
{
u16 val, new_val;
int reg_c45;
@ -183,7 +272,7 @@ static int mv88e6390_serdes_10g(struct mv88e6xxx_chip *chip, int addr, bool on)
reg_c45 = MII_ADDR_C45 | MV88E6390_SERDES_DEVICE |
MV88E6390_PCS_CONTROL_1;
err = mv88e6xxx_phy_read(chip, addr, reg_c45, &val);
err = mv88e6xxx_phy_read(chip, lane, reg_c45, &val);
if (err)
return err;
@ -195,13 +284,13 @@ static int mv88e6390_serdes_10g(struct mv88e6xxx_chip *chip, int addr, bool on)
new_val = val | MV88E6390_PCS_CONTROL_1_PDOWN;
if (val != new_val)
err = mv88e6xxx_phy_write(chip, addr, reg_c45, new_val);
err = mv88e6xxx_phy_write(chip, lane, reg_c45, new_val);
return err;
}
/* Set the power on/off for 10GBASE-R and 10GBASE-X4/X2 */
static int mv88e6390_serdes_sgmii(struct mv88e6xxx_chip *chip, int addr,
/* Set the power on/off for SGMII and 1000Base-X */
static int mv88e6390_serdes_sgmii(struct mv88e6xxx_chip *chip, int lane,
bool on)
{
u16 val, new_val;
@ -210,7 +299,7 @@ static int mv88e6390_serdes_sgmii(struct mv88e6xxx_chip *chip, int addr,
reg_c45 = MII_ADDR_C45 | MV88E6390_SERDES_DEVICE |
MV88E6390_SGMII_CONTROL;
err = mv88e6xxx_phy_read(chip, addr, reg_c45, &val);
err = mv88e6xxx_phy_read(chip, lane, reg_c45, &val);
if (err)
return err;
@ -222,69 +311,13 @@ static int mv88e6390_serdes_sgmii(struct mv88e6xxx_chip *chip, int addr,
new_val = val | MV88E6390_SGMII_CONTROL_PDOWN;
if (val != new_val)
err = mv88e6xxx_phy_write(chip, addr, reg_c45, new_val);
err = mv88e6xxx_phy_write(chip, lane, reg_c45, new_val);
return err;
}
static int mv88e6390_serdes_lower(struct mv88e6xxx_chip *chip, u8 cmode,
int port_donor, int lane, bool rxaui, bool on)
{
int err;
u8 cmode_donor;
err = mv88e6xxx_port_get_cmode(chip, port_donor, &cmode_donor);
if (err)
return err;
switch (cmode_donor) {
case MV88E6XXX_PORT_STS_CMODE_RXAUI:
if (!rxaui)
break;
/* Fall through */
case MV88E6XXX_PORT_STS_CMODE_1000BASE_X:
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASE_X ||
cmode == MV88E6XXX_PORT_STS_CMODE_SGMII)
return mv88e6390_serdes_sgmii(chip, lane, on);
}
return 0;
}
static int mv88e6390_serdes_port9(struct mv88e6xxx_chip *chip, u8 cmode,
bool on)
{
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_1000BASE_X:
case MV88E6XXX_PORT_STS_CMODE_SGMII:
return mv88e6390_serdes_sgmii(chip, MV88E6390_PORT9_LANE0, on);
case MV88E6XXX_PORT_STS_CMODE_XAUI:
case MV88E6XXX_PORT_STS_CMODE_RXAUI:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
return mv88e6390_serdes_10g(chip, MV88E6390_PORT9_LANE0, on);
}
return 0;
}
static int mv88e6390_serdes_port10(struct mv88e6xxx_chip *chip, u8 cmode,
bool on)
{
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
return mv88e6390_serdes_sgmii(chip, MV88E6390_PORT10_LANE0, on);
case MV88E6XXX_PORT_STS_CMODE_XAUI:
case MV88E6XXX_PORT_STS_CMODE_RXAUI:
case MV88E6XXX_PORT_STS_CMODE_1000BASE_X:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
return mv88e6390_serdes_10g(chip, MV88E6390_PORT10_LANE0, on);
}
return 0;
}
int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
static int mv88e6390_serdes_power_lane(struct mv88e6xxx_chip *chip, int port,
int lane, bool on)
{
u8 cmode;
int err;
@ -293,35 +326,35 @@ int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
if (err)
return err;
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
case MV88E6XXX_PORT_STS_CMODE_1000BASE_X:
return mv88e6390_serdes_sgmii(chip, lane, on);
case MV88E6XXX_PORT_STS_CMODE_XAUI:
case MV88E6XXX_PORT_STS_CMODE_RXAUI:
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
return mv88e6390_serdes_10g(chip, lane, on);
}
return 0;
}
int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
{
int lane;
lane = mv88e6390_serdes_get_lane(chip, port);
if (lane == -ENODEV)
return 0;
if (lane < 0)
return lane;
switch (port) {
case 2:
return mv88e6390_serdes_lower(chip, cmode, 9,
MV88E6390_PORT9_LANE1,
false, on);
case 3:
return mv88e6390_serdes_lower(chip, cmode, 9,
MV88E6390_PORT9_LANE2,
true, on);
case 4:
return mv88e6390_serdes_lower(chip, cmode, 9,
MV88E6390_PORT9_LANE3,
true, on);
case 5:
return mv88e6390_serdes_lower(chip, cmode, 10,
MV88E6390_PORT10_LANE1,
false, on);
case 6:
return mv88e6390_serdes_lower(chip, cmode, 10,
MV88E6390_PORT10_LANE2,
true, on);
case 7:
return mv88e6390_serdes_lower(chip, cmode, 10,
MV88E6390_PORT10_LANE3,
true, on);
case 9:
return mv88e6390_serdes_port9(chip, cmode, on);
case 10:
return mv88e6390_serdes_port10(chip, cmode, on);
case 2 ... 4:
case 5 ... 7:
case 9 ... 10:
return mv88e6390_serdes_power_lane(chip, port, lane, on);
}
return 0;