[PATCH net-next A 3/5] sfp: add support for 1000Base-PX and 1000Base-BX10

[Russell King]

Add support for decoding the transceiver information for 1000Base-PX and
1000Base-BX10.  These use 1000BASE-X protocol.

Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
---
 drivers/net/phy/sfp-bus.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index a668a67c7eef..6c05acd5b1d4 100644
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -165,10 +165,26 @@ EXPORT_SYMBOL_GPL(sfp_parse_interface);
 void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
                       unsigned long *support)
 {
+       unsigned int br_min, br_nom, br_max;
+
        phylink_set(support, Autoneg);
        phylink_set(support, Pause);
        phylink_set(support, Asym_Pause);
 
+       /* Decode the bitrate information to MBd */
+       br_min = br_nom = br_max = 0;
+       if (id->base.br_nominal) {
+               if (id->base.br_nominal != 255) {
+                       br_nom = id->base.br_nominal * 100;
+                       br_min = br_nom + id->base.br_nominal * id->ext.br_min;
+                       br_max = br_nom + id->base.br_nominal * id->ext.br_max;
+               } else if (id->ext.br_max) {
+                       br_nom = 250 * id->ext.br_max;
+                       br_max = br_nom + br_nom * id->ext.br_min / 100;
+                       br_min = br_nom - br_nom * id->ext.br_min / 100;
+               }
+       }
+
        /* Set ethtool support from the compliance fields. */
        if (id->base.e10g_base_sr)
                phylink_set(support, 10000baseSR_Full);
@@ -187,6 +203,11 @@ void sfp_parse_support(struct sfp_bus *bus, const struct 
sfp_eeprom_id *id,
                phylink_set(support, 1000baseT_Full);
        }
 
+       /* 1000Base-PX or 1000Base-BX10 */
+       if ((id->base.e_base_px || id->base.e_base_bx10) &&
+           br_min <= 1300 && br_max >= 1200)
+               phylink_set(support, 1000baseX_Full);
+
        switch (id->base.extended_cc) {
        case 0x00: /* Unspecified */
                break;
-- 
2.7.4