svn commit: r190598 - head/sys/dev/ed
Warner Losh
imp at FreeBSD.org
Tue Mar 31 12:24:00 PDT 2009
Author: imp
Date: Tue Mar 31 19:23:59 2009
New Revision: 190598
URL: http://svn.freebsd.org/changeset/base/190598
Log:
Add additional data on the MIIBUS WTF that I committed earlier.
Modified:
head/sys/dev/ed/if_ed_pccard.c
Modified: head/sys/dev/ed/if_ed_pccard.c
==============================================================================
--- head/sys/dev/ed/if_ed_pccard.c Tue Mar 31 19:20:03 2009 (r190597)
+++ head/sys/dev/ed/if_ed_pccard.c Tue Mar 31 19:23:59 2009 (r190598)
@@ -1098,6 +1098,10 @@ ed_miibus_readreg(device_t dev, int phy,
* Also, PHYs above 16 appear to be phantoms on some cards, but not
* others. Registers read for this are often the same as prior values
* read. Filter all register requests to 17-31.
+ *
+ * I can't explain it, since I don't have the DL100xx data sheets, but
+ * the DL100xx chips do 13-bits before the 'ACK' but, but the AX88x90
+ * chips have 14. The linux pcnet and axnet drivers confirm this.
*/
if (sc->chip_type == ED_CHIP_TYPE_AX88790) {
if (phy > 0x10)
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