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>
diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index 880b2cf..a218870 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -174,8 +174,97 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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;