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DM9000: improve eth_send() routine

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The eth_send routine of the U-boot DM9000x driver does not match the
DM9000 or DM9000A application notes/programming guides.

This change improves the stability of the DM9000A network controller.

This change has been tested with DM9000A, DM9000E, DM9000EP.

Signed-off-by: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Remy Bohmer 2008-06-03 15:26:23 +02:00 committed by Ben Warren
parent 134e266253
commit acba31847f
1 changed files with 11 additions and 4 deletions
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15
drivers/net/dm9000x.c
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@ -42,6 +42,9 @@ v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
06/03/2008 Remy Bohmer <linux@bohmer.net>
- Added autodetect of databus width.
- Made debug code compile again.
- Adapt eth_send such that it matches the DM9000*
application notes. Needed to make it work properly
for DM9000A.
These changes are tested with DM9000{A,EP,E} together
with a 200MHz Atmel AT91SAM92161 core
@ -505,15 +508,16 @@ int
eth_send(volatile void *packet, int length)
{
char *data_ptr;
u32 tmplen, i;
int tmo;
struct board_info *db = &dm9000_info;
DM9000_DMP_PACKET("eth_send", packet, length);
DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
/* Move data to DM9000 TX RAM */
data_ptr = (char *) packet;
DM9000_outb(DM9000_MWCMD, DM9000_IO);
DM9000_outb(DM9000_MWCMD, DM9000_IO); /* Prepare for TX-data */
/* push the data to the TX-fifo */
(db->outblk)(data_ptr, length);
@ -523,16 +527,19 @@ eth_send(volatile void *packet, int length)
DM9000_iow(DM9000_TXPLH, (length >> 8) & 0xff);
/* Issue TX polling command */
DM9000_iow(DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
DM9000_iow(DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
/* wait for end of transmission */
tmo = get_timer(0) + 5 * CFG_HZ;
while (DM9000_ior(DM9000_TCR) & TCR_TXREQ) {
while ( !(DM9000_ior(DM9000_NSR) & (NSR_TX1END | NSR_TX2END)) ||
!(DM9000_ior(DM9000_ISR) & IMR_PTM) ) {
if (get_timer(0) >= tmo) {
printf("transmission timeout\n");
break;
}
}
DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
DM9000_DBG("transmit done\n\n");
return 0;
}