TULIP: Fix for 64-bit MIPS

From: Jim Gifford <maillist@jg555.com>, Grant Grundler <grundler@parisc-linux.org>, Peter Horton <pdh@colonel-panic.org>

With Grant's help I was able to get the tulip driver to work with 64 bit
MIPS.

[VAL: I'm happy with the 1.5 ms max delay; it doesn't seem excessive.]

Signed-off-by: Valerie Henson <val_henson@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 20 insertions, 2 deletions

diff --git a/drivers/net/tulip/media.c b/drivers/net/tulip/media.c
index 20bd52b86993..1594160a0f62 100644
--- a/drivers/net/tulip/media.c
+++ b/drivers/net/tulip/media.c
@@ -44,8 +44,10 @@ static const unsigned char comet_miireg2offset[32] = {
 
 /* MII transceiver control section.
    Read and write the MII registers using software-generated serial
-   MDIO protocol.  See the MII specifications or DP83840A data sheet
-   for details. */
+   MDIO protocol.
+   See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management functions")
+   or DP83840A data sheet for more details.
+   */
 
 int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
 {
@@ -272,13 +274,29 @@ void tulip_select_media(struct net_device *dev, int startup)
                                 int reset_length = p[2 + init_length];
                                 misc_info = (u16*)(reset_sequence + reset_length);
                                 if (startup) {
+                                        int timeout = 10;       /* max 1 ms */
                                         iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
                                         for (i = 0; i < reset_length; i++)
                                                 iowrite32(reset_sequence[i], ioaddr + CSR12);
+
+                                        /* flush posted writes */
+                                        ioread32(ioaddr + CSR12);
+
+                                        /* 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(init_sequence[i], ioaddr + CSR12);
+
+                                ioread32(ioaddr + CSR12);       /* flush posted writes */
                         }
+
                         tmp_info = get_u16(&misc_info[1]);
                         if (tmp_info)
                                 tp->advertising[phy_num] = tmp_info | 1;