ppc4xx: EMAC: Fix 405EZ fifo size setup in EMAC_MR1
The 405EZ only supports 512 bytes of rx-/tx-fifo EMAC sizes. But
currently 4k/2k is configured. This patch fixes this issue.
Thanks to Thomas Kindler <tkindler@lenord.de> for pointing this out.
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/cpu/ppc4xx/4xx_enet.c b/cpu/ppc4xx/4xx_enet.c
index 5ef1005..599f5ce 100644
--- a/cpu/ppc4xx/4xx_enet.c
+++ b/cpu/ppc4xx/4xx_enet.c
@@ -975,9 +975,10 @@
/* set transmit enable & receive enable */
out_be32((void *)EMAC_M0 + hw_p->hw_addr, EMAC_M0_TXE | EMAC_M0_RXE);
- /* set receive fifo to 4k and tx fifo to 2k */
mode_reg = in_be32((void *)EMAC_M1 + hw_p->hw_addr);
- mode_reg |= EMAC_M1_RFS_4K | EMAC_M1_TX_FIFO_2K;
+
+ /* set rx-/tx-fifo size */
+ mode_reg = (mode_reg & ~EMAC_MR1_FIFO_MASK) | EMAC_MR1_FIFO_SIZE;
/* set speed */
if (speed == _1000BASET) {
diff --git a/include/ppc4xx_enet.h b/include/ppc4xx_enet.h
index f285500..317604a 100644
--- a/include/ppc4xx_enet.h
+++ b/include/ppc4xx_enet.h
@@ -356,12 +356,14 @@
#define EMAC_M1_IST (0x01000000)
#define EMAC_M1_MF_1000MBPS (0x00800000) /* 0's for 10MBPS */
#define EMAC_M1_MF_100MBPS (0x00400000)
-#define EMAC_M1_RFS_16K (0x00280000) /* ~4k for 512 byte */
-#define EMAC_M1_RFS_8K (0x00200000) /* ~4k for 512 byte */
-#define EMAC_M1_RFS_4K (0x00180000) /* ~4k for 512 byte */
+#define EMAC_M1_RFS_MASK (0x00380000)
+#define EMAC_M1_RFS_16K (0x00280000)
+#define EMAC_M1_RFS_8K (0x00200000)
+#define EMAC_M1_RFS_4K (0x00180000)
#define EMAC_M1_RFS_2K (0x00100000)
#define EMAC_M1_RFS_1K (0x00080000)
-#define EMAC_M1_TX_FIFO_16K (0x00050000) /* 0's for 512 byte */
+#define EMAC_M1_TX_FIFO_MASK (0x00070000)
+#define EMAC_M1_TX_FIFO_16K (0x00050000)
#define EMAC_M1_TX_FIFO_8K (0x00040000)
#define EMAC_M1_TX_FIFO_4K (0x00030000)
#define EMAC_M1_TX_FIFO_2K (0x00020000)
@@ -386,11 +388,15 @@
#define EMAC_M1_IST 0x01000000
#define EMAC_M1_MF_1000MBPS 0x00800000 /* 0's for 10MBPS */
#define EMAC_M1_MF_100MBPS 0x00400000
-#define EMAC_M1_RFS_4K 0x00300000 /* ~4k for 512 byte */
+#define EMAC_M1_RFS_MASK 0x00300000
+#define EMAC_M1_RFS_4K 0x00300000
#define EMAC_M1_RFS_2K 0x00200000
#define EMAC_M1_RFS_1K 0x00100000
-#define EMAC_M1_TX_FIFO_2K 0x00080000 /* 0's for 512 byte */
+#define EMAC_M1_RFS_512 0x00000000
+#define EMAC_M1_TX_FIFO_MASK 0x000c0000
+#define EMAC_M1_TX_FIFO_2K 0x00080000
#define EMAC_M1_TX_FIFO_1K 0x00040000
+#define EMAC_M1_TX_FIFO_512 0x00000000
#define EMAC_M1_TR0_DEPEND 0x00010000 /* 0'x for single packet */
#define EMAC_M1_TR0_MULTI 0x00008000
#define EMAC_M1_TR1_DEPEND 0x00004000
@@ -400,6 +406,15 @@
#endif /* defined(CONFIG_440EP) || defined(CONFIG_440GR) */
#endif /* defined(CONFIG_440GX) */
+#define EMAC_MR1_FIFO_MASK (EMAC_M1_RFS_MASK | EMAC_M1_TX_FIFO_MASK)
+#if defined(CONFIG_405EZ)
+/* 405EZ only supports 512 bytes fifos */
+#define EMAC_MR1_FIFO_SIZE (EMAC_M1_RFS_512 | EMAC_M1_TX_FIFO_512)
+#else
+/* Set receive fifo to 4k and tx fifo to 2k */
+#define EMAC_MR1_FIFO_SIZE (EMAC_M1_RFS_4K | EMAC_M1_TX_FIFO_2K)
+#endif
+
/* Transmit Mode Register 0 */
#define EMAC_TXM0_GNP0 (0x80000000)
#define EMAC_TXM0_GNP1 (0x40000000)