From: Thibaut VARENE <[EMAIL PROTECTED]>
Fix a problem with Tulip 21142 HP branded PCI cards (PN#: B5509-66001),
which feature a NatSemi DP83840A PHY.
Without that patch, it is impossible to properly initialize the card's PHY,
and it's thus impossible to monitor/configure it.
It's a timing/posting problem, and it is solved exactly the same way Grant
fixed it elsewhere already.
Signed-off-by: Thibaut VARENE <[EMAIL PROTECTED]>
Cc: Jeff Garzik <[EMAIL PROTECTED]>
Acked-by: Grant Grundler <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/net/tulip/media.c | 18 +++++++++++++++++-
1 files changed, 17 insertions(+), 1 deletion(-)
diff -puN drivers/net/tulip/media.c~tulip-natsemi-dp83840a-phy-fix
drivers/net/tulip/media.c
--- devel/drivers/net/tulip/media.c~tulip-natsemi-dp83840a-phy-fix
2006-03-08 00:05:50.000000000 -0800
+++ devel-akpm/drivers/net/tulip/media.c 2006-03-08 00:05:50.000000000
-0800
@@ -263,11 +263,27 @@ void tulip_select_media(struct net_devic
u16 *reset_sequence =
&((u16*)(p+3))[init_length];
int reset_length = p[2 + init_length*2];
misc_info = reset_sequence + reset_length;
- if (startup)
+ if (startup) {
+ int timeout = 10; /* max 1 ms */
for (i = 0; i < reset_length; i++)
iowrite32(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
+
+ /* flush posted writes */
+ ioread32(ioaddr + CSR15);
+
+ /* Sect 3.10.3 in DP83840A.pdf (p39) */
+ udelay(500);
+
+ /* Section 4.2 in DP83840A.pdf (p43) */
+ /* and IEEE 802.3 "22.2.4.1.1 Reset" */
+ while (timeout-- &&
+ (tulip_mdio_read (dev, phy_num,
MII_BMCR) & BMCR_RESET))
+ udelay(100);
+ }
for (i = 0; i < init_length; i++)
iowrite32(get_u16(&init_sequence[i]) <<
16, ioaddr + CSR15);
+
+ ioread32(ioaddr + CSR15); /* flush posted
writes */
} else {
u8 *init_sequence = p + 2;
u8 *reset_sequence = p + 3 + init_length;
_
-
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