From f32f7fe7bd3a5bda3a476520f00e1aca7c2103a9 Mon Sep 17 00:00:00 2001
From: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Date: Wed, 30 Apr 2008 12:11:19 -0500
Subject: [PATCH] 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>
---
drivers/net/fsl_mcdmafec.c | 22 +++++++++++++++++++++-
include/configs/M5475EVB.h | 1 +
include/configs/M5485EVB.h | 1 +
3 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/drivers/net/fsl_mcdmafec.c b/drivers/net/fsl_mcdmafec.c
index 0c876f33bdc..2ef91f2d224 100644
--- a/drivers/net/fsl_mcdmafec.c
+++ b/drivers/net/fsl_mcdmafec.c
@@ -95,7 +95,11 @@ struct fec_info_dma fec_info[] = {
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 @@ static void dbg_fec_regs(struct eth_device *dev)
}
#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 @@ int mcdmafec_initialize(bd_t * bis)
{
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 @@ int mcdmafec_initialize(bd_t * bis)
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 @@ int mcdmafec_initialize(bd_t * bis)
(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 6bb461913a7..fea7551cf1a 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 cba51c87c1d..454d0a28dc2 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
--
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