net: dsa: mv88e6xxx: mv88e6390X SERDES support

The mv88e6390X family has 8 SERDES lanes. These can be used for 2
10Gbps ports, ports 9 or 10. If these ports are used at slower speeds,
the SERDES lanes become available for other ports for 1000Base-X.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index bc7b345..4e58d9a 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2757,6 +2757,7 @@ static const struct mv88e6xxx_ops mv88e6190_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6390_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6390_g1_vtu_loadpurge,
+       .serdes_power = mv88e6390_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6190x_ops = {
@@ -2789,6 +2790,7 @@ static const struct mv88e6xxx_ops mv88e6190x_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6390_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6390_g1_vtu_loadpurge,
+       .serdes_power = mv88e6390_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6191_ops = {
@@ -2821,6 +2823,7 @@ static const struct mv88e6xxx_ops mv88e6191_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6390_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6390_g1_vtu_loadpurge,
+       .serdes_power = mv88e6390_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6240_ops = {
@@ -2888,6 +2891,7 @@ static const struct mv88e6xxx_ops mv88e6290_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6390_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6390_g1_vtu_loadpurge,
+       .serdes_power = mv88e6390_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6320_ops = {
@@ -3113,6 +3117,7 @@ static const struct mv88e6xxx_ops mv88e6390_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6390_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6390_g1_vtu_loadpurge,
+       .serdes_power = mv88e6390_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6390x_ops = {
@@ -3147,6 +3152,7 @@ static const struct mv88e6xxx_ops mv88e6390x_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6390_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6390_g1_vtu_loadpurge,
+       .serdes_power = mv88e6390_serdes_power,
 };
 
 static const struct mv88e6xxx_info mv88e6xxx_table[] = {

diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index 235f5f0..5379567 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -13,6 +13,7 @@
 
 #include <linux/mii.h>
 
+#include "global2.h"
 #include "mv88e6xxx.h"
 #include "phy.h"
 #include "port.h"
@@ -73,3 +74,156 @@ int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
 
        return 0;
 }
+
+/* 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)
+{
+       u16 val, new_val;
+       int reg_c45;
+       int err;
+
+       reg_c45 = MII_ADDR_C45 | MV88E6390_SERDES_DEVICE |
+               MV88E6390_PCS_CONTROL_1;
+       err = mv88e6xxx_phy_read(chip, addr, reg_c45, &val);
+       if (err)
+               return err;
+
+       if (on)
+               new_val = val & ~(MV88E6390_PCS_CONTROL_1_RESET |
+                                 MV88E6390_PCS_CONTROL_1_LOOPBACK |
+                                 MV88E6390_PCS_CONTROL_1_PDOWN);
+       else
+               new_val = val | MV88E6390_PCS_CONTROL_1_PDOWN;
+
+       if (val != new_val)
+               err = mv88e6xxx_phy_write(chip, addr, 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,
+                                 bool on)
+{
+       u16 val, new_val;
+       int reg_c45;
+       int err;
+
+       reg_c45 = MII_ADDR_C45 | MV88E6390_SERDES_DEVICE |
+               MV88E6390_SGMII_CONTROL;
+       err = mv88e6xxx_phy_read(chip, addr, reg_c45, &val);
+       if (err)
+               return err;
+
+       if (on)
+               new_val = val & ~(MV88E6390_SGMII_CONTROL_RESET |
+                                 MV88E6390_SGMII_CONTROL_LOOPBACK |
+                                 MV88E6390_SGMII_CONTROL_PDOWN);
+       else
+               new_val = val | MV88E6390_SGMII_CONTROL_PDOWN;
+
+       if (val != new_val)
+               err = mv88e6xxx_phy_write(chip, addr, 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 PORT_STATUS_CMODE_RXAUI:
+               if (!rxaui)
+                       break;
+               /* Fall through */
+       case PORT_STATUS_CMODE_1000BASE_X:
+       case PORT_STATUS_CMODE_SGMII:
+       case PORT_STATUS_CMODE_2500BASEX:
+               if (cmode == PORT_STATUS_CMODE_1000BASE_X ||
+                   cmode == PORT_STATUS_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 PORT_STATUS_CMODE_1000BASE_X:
+       case PORT_STATUS_CMODE_SGMII:
+               return mv88e6390_serdes_sgmii(chip, MV88E6390_PORT9_LANE0, on);
+       case PORT_STATUS_CMODE_XAUI:
+       case PORT_STATUS_CMODE_RXAUI:
+       case PORT_STATUS_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 PORT_STATUS_CMODE_SGMII:
+               return mv88e6390_serdes_sgmii(chip, MV88E6390_PORT10_LANE0, on);
+       case PORT_STATUS_CMODE_XAUI:
+       case PORT_STATUS_CMODE_RXAUI:
+       case PORT_STATUS_CMODE_1000BASE_X:
+       case PORT_STATUS_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)
+{
+       u8 cmode;
+       int err;
+
+       err = mv88e6xxx_port_get_cmode(chip, port, &cmode);
+       if (err)
+               return cmode;
+
+       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);
+       }
+
+       return 0;
+}

diff --git a/drivers/net/dsa/mv88e6xxx/serdes.h b/drivers/net/dsa/mv88e6xxx/serdes.h
index a690be0..eb3ceae 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/serdes.h
+++ b/drivers/net/dsa/mv88e6xxx/serdes.h
@@ -19,6 +19,30 @@
 #define MV88E6352_ADDR_SERDES          0x0f
 #define MV88E6352_SERDES_PAGE_FIBER    0x01
 
+#define MV88E6390_PORT9_LANE0          0x09
+#define MV88E6390_PORT9_LANE1          0x12
+#define MV88E6390_PORT9_LANE2          0x13
+#define MV88E6390_PORT9_LANE3          0x14
+#define MV88E6390_PORT10_LANE0         0x0a
+#define MV88E6390_PORT10_LANE1         0x15
+#define MV88E6390_PORT10_LANE2         0x16
+#define MV88E6390_PORT10_LANE3         0x17
+#define MV88E6390_SERDES_DEVICE                (4 << 16)
+
+/* 10GBASE-R and 10GBASE-X4/X2 */
+#define MV88E6390_PCS_CONTROL_1                0x1000
+#define MV88E6390_PCS_CONTROL_1_RESET          BIT(15)
+#define MV88E6390_PCS_CONTROL_1_LOOPBACK       BIT(14)
+#define MV88E6390_PCS_CONTROL_1_SPEED          BIT(13)
+#define MV88E6390_PCS_CONTROL_1_PDOWN          BIT(11)
+
+/* 1000BASE-X and SGMII */
+#define MV88E6390_SGMII_CONTROL                0x2000
+#define MV88E6390_SGMII_CONTROL_RESET          BIT(15)
+#define MV88E6390_SGMII_CONTROL_LOOPBACK       BIT(14)
+#define MV88E6390_SGMII_CONTROL_PDOWN          BIT(11)
+
 int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
+int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
 
 #endif