ColdFire: Fix ethernet hang issue for mcf547x_8x
The ethernet hang is caused by receiving buffer in DRAM is not
yet ready due to access cycles require longer time in DRAM.
Relocate DMA buffer descriptors from DRAM to internal SRAM.
Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
diff --git a/drivers/net/fsl_mcdmafec.c b/drivers/net/fsl_mcdmafec.c
index 0c876f3..2ef91f2 100644
--- a/drivers/net/fsl_mcdmafec.c
+++ b/drivers/net/fsl_mcdmafec.c
@@ -95,7 +95,11 @@
0, /* duplex and speed */
0, /* phy name */
0, /* phy name init */
+#ifdef CFG_DMA_USE_INTSRAM
+ DBUF_LENGTH, /* RX BD */
+#else
0, /* RX BD */
+#endif
0, /* TX BD */
0, /* rx Index */
0, /* tx Index */
@@ -164,7 +168,8 @@
}
#endif
-static void set_fec_duplex_speed(volatile fecdma_t * fecp, bd_t * bd, int dup_spd)
+static void set_fec_duplex_speed(volatile fecdma_t * fecp, bd_t * bd,
+ int dup_spd)
{
if ((dup_spd >> 16) == FULL) {
/* Set maximum frame length */
@@ -513,6 +518,9 @@
{
struct eth_device *dev;
int i;
+#ifdef CFG_DMA_USE_INTSRAM
+ u32 tmp = CFG_INTSRAM + 0x2000;
+#endif
for (i = 0; i < sizeof(fec_info) / sizeof(fec_info[0]); i++) {
@@ -533,6 +541,17 @@
dev->recv = fec_recv;
/* setup Receive and Transmit buffer descriptor */
+#ifdef CFG_DMA_USE_INTSRAM
+ fec_info[i].rxbd = (int)fec_info[i].rxbd + tmp;
+ tmp = fec_info[i].rxbd;
+ fec_info[i].txbd =
+ (int)fec_info[i].txbd + tmp + (PKTBUFSRX * sizeof(cbd_t));
+ tmp = fec_info[i].txbd;
+ fec_info[i].txbuf =
+ (int)fec_info[i].txbuf + tmp +
+ (CFG_TX_ETH_BUFFER * sizeof(cbd_t));
+ tmp = fec_info[i].txbuf;
+#else
fec_info[i].rxbd =
(cbd_t *) memalign(CFG_CACHELINE_SIZE,
(PKTBUFSRX * sizeof(cbd_t)));
@@ -541,6 +560,7 @@
(CFG_TX_ETH_BUFFER * sizeof(cbd_t)));
fec_info[i].txbuf =
(char *)memalign(CFG_CACHELINE_SIZE, DBUF_LENGTH);
+#endif
#ifdef ET_DEBUG
printf("rxbd %x txbd %x\n",
diff --git a/include/configs/M5475EVB.h b/include/configs/M5475EVB.h
index 6bb4619..fea7551 100644
--- a/include/configs/M5475EVB.h
+++ b/include/configs/M5475EVB.h
@@ -72,6 +72,7 @@
# define CONFIG_MII_INIT 1
# define CONFIG_HAS_ETH1
+# define CFG_DMA_USE_INTSRAM 1
# define CFG_DISCOVER_PHY
# define CFG_RX_ETH_BUFFER 32
# define CFG_TX_ETH_BUFFER 48
diff --git a/include/configs/M5485EVB.h b/include/configs/M5485EVB.h
index cba51c8..454d0a2 100644
--- a/include/configs/M5485EVB.h
+++ b/include/configs/M5485EVB.h
@@ -72,6 +72,7 @@
# define CONFIG_MII_INIT 1
# define CONFIG_HAS_ETH1
+# define CFG_DMA_USE_INTSRAM 1
# define CFG_DISCOVER_PHY
# define CFG_RX_ETH_BUFFER 32
# define CFG_TX_ETH_BUFFER 48