sfp: add support for 1000Base-PX and 1000Base-BX10

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

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index 9d7a010edf23..ba42e39bd112 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;