bnx2x: half duplex support added for several boards

From: Yaniv Rosner <yaniv.rosner@broadcom.com>

Several boards require an additional HW bit written in-order to enable
half duplex.
Signed-off-by: Yaniv Rosner <yaniv.rosner@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c

@@ -1612,6 +1612,9 @@ static void bnx2x_umac_enable(struct link_params *params,
 	if (!(vars->flow_ctrl & BNX2X_FLOW_CTRL_RX))
 		val |= UMAC_COMMAND_CONFIG_REG_PAUSE_IGNORE;
 
+	if (vars->duplex == DUPLEX_HALF)
+		val |= UMAC_COMMAND_CONFIG_REG_HD_ENA;
+
 	REG_WR(bp, umac_base + UMAC_REG_COMMAND_CONFIG, val);
 	udelay(50);
 

drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h

@@ -4812,6 +4812,7 @@
    The fields are: [4:0] - tail pointer; 10:5] - Link List size; 15:11] -
    header pointer. */
 #define UCM_REG_XX_TABLE					 0xe0300
+#define UMAC_COMMAND_CONFIG_REG_HD_ENA				 (0x1<<10)
 #define UMAC_COMMAND_CONFIG_REG_IGNORE_TX_PAUSE			 (0x1<<28)
 #define UMAC_COMMAND_CONFIG_REG_LOOP_ENA			 (0x1<<15)
 #define UMAC_COMMAND_CONFIG_REG_NO_LGTH_CHECK			 (0x1<<24)