Merge remote-tracking branch 'u-boot/master'

[oweals/u-boot.git] / drivers / net / macb.c

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index bf3983a00c67a5ce8b51292955f1a24064691dd9..781a272cff2edec4650025c5c3b94515186e0f41 100644 (file)
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -621,6 +621,24 @@ static u32 gem_mdc_clk_div(int id, struct macb_device *macb)
        return config;
 }
 
+/*
+ * Get the DMA bus width field of the network configuration register that we
+ * should program. We find the width from decoding the design configuration
+ * register to find the maximum supported data bus width.
+ */
+static u32 macb_dbw(struct macb_device *macb)
+{
+       switch (GEM_BFEXT(DBWDEF, gem_readl(macb, DCFG1))) {
+       case 4:
+               return GEM_BF(DBW, GEM_DBW128);
+       case 2:
+               return GEM_BF(DBW, GEM_DBW64);
+       case 1:
+       default:
+               return GEM_BF(DBW, GEM_DBW32);
+       }
+}
+
 int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
 {
        struct macb_device *macb;
@@ -665,7 +683,7 @@ int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
         */
        if (macb_is_gem(macb)) {
                ncfgr = gem_mdc_clk_div(id, macb);
-               ncfgr |= GEM_BF(DBW, 1);
+               ncfgr |= macb_dbw(macb);
        } else {
                ncfgr = macb_mdc_clk_div(id, macb);
        }