[commit] r1908 - in dev/mmc/sdhci: . mv8686

[repository service]

Author: wmb
Date: Wed Aug  4 06:47:17 2010
New Revision: 1908
URL: http://tracker.coreboot.org/trac/openfirmware/changeset/1908

Log:
SD driver - added quirk for Marvell 88W8686 reset issue as described in Marvell AppNote AN-20017.  It is possible that, without this workaround, the XO-1.5 WLAN module might fail to reset properly.

Added:
   dev/mmc/sdhci/mv8686/quirk.fth
Modified:
   dev/mmc/sdhci/sdhci.fth
   dev/mmc/sdhci/sdhcixo.bth

Added: dev/mmc/sdhci/mv8686/quirk.fth
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ dev/mmc/sdhci/mv8686/quirk.fth	Wed Aug  4 06:47:17 2010	(r1908)
@@ -0,0 +1,10 @@
+\ This is a workaround for a reset problem with the Marvell 88W8686
+\ as described in Marvell AppNote AN-20017.  Basically, you have to
+\ pulse the external reset pin after powering up the module, otherwise
+\ it might not reset correctly.
+
+: mv8686-reset-quirk  ( -- )
+   d# 50 ms
+   " wlan-reset" evaluate
+;
+' mv8686-reset-quirk to ?mv8686-quirk

Modified: dev/mmc/sdhci/sdhci.fth
==============================================================================
--- dev/mmc/sdhci/sdhci.fth	Wed Aug  4 06:44:34 2010	(r1907)
+++ dev/mmc/sdhci/sdhci.fth	Wed Aug  4 06:47:17 2010	(r1908)
@@ -23,6 +23,8 @@

h# 200 constant /block  \ 512 bytes

+defer ?mv8686-quirk  ' noop to ?mv8686-quirk
+
 external
 : set-address  ( rca slot -- )  to slot  to rca  map-regs  ;
 : get-address  ( -- rca )       rca  ;
@@ -749,6 +751,7 @@
    card-power-off d# 500 ms
    card-power-on  d# 50 ms  \ This delay is just a guess (20 was barely too slow for a Via board)
    card-inserted?  0=  if  card-power-off  intstat-off  false true exit  then   
+   ?mv8686-quirk
    card-clock-slow  d# 50 ms  \ This delay is just a guess
    reset-card     \ Cmd 0
    false

Modified: dev/mmc/sdhci/sdhcixo.bth
==============================================================================
--- dev/mmc/sdhci/sdhcixo.bth	Wed Aug  4 06:44:34 2010	(r1907)
+++ dev/mmc/sdhci/sdhcixo.bth	Wed Aug  4 06:47:17 2010	(r1908)
@@ -10,7 +10,7 @@
 FCode-version2
 fload ${BP}/dev/mmc/sdhci/pciregs.fth
 fload ${BP}/dev/mmc/sdhci/sdhci.fth
-
+fload ${BP}/dev/mmc/sdhci/mv8686/quirk.fth
 init

: populate-children  ( -- )