From: Thibaut VARENE 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 Cc: Jeff Garzik Cc: Grant Grundler Signed-off-by: Andrew Morton --- 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 --- 25/drivers/net/tulip/media.c~tulip-natsemi-dp83840a-phy-fix Tue May 10 12:55:19 2005 +++ 25-akpm/drivers/net/tulip/media.c Tue May 10 12:55:19 2005 @@ -298,11 +298,27 @@ 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; _