[commit] r1934 - dev/mmc/sdhci

[repository service]

Author: wmb
Date: Wed Aug 11 10:50:37 2010
New Revision: 1934
URL: http://tracker.coreboot.org/trac/openfirmware/changeset/1934

Log:
SD driver - added the ability to disable high-speed operation on specific platforms.

Modified:
   dev/mmc/sdhci/sdhci.fth

Modified: dev/mmc/sdhci/sdhci.fth
==============================================================================
--- dev/mmc/sdhci/sdhci.fth	Wed Aug 11 10:48:52 2010	(r1933)
+++ dev/mmc/sdhci/sdhci.fth	Wed Aug 11 10:50:37 2010	(r1934)
@@ -643,6 +643,24 @@
    h# e data-timeout!   \ 2^26 / 48 MHz = 1.4 sec
 ;

+false value avoid-high-speed?
+: set-speed  ( -- )
+   avoid-high-speed?  if
+      card-clock-25
+      exit
+   then
+
+   \ Ask if high-speed is supported
+   h# 00ff.fff1 switch-function d# 13 + c@  2  and  if   \ cmd6
+      h# 80ff.fff1 switch-function drop   \ Perform the switch  cmd6
+      \ Bump the host controller clock
+      host-high-speed  \ Changes the clock edge
+      card-clock-50
+   else
+      card-clock-25
+   then
+;
+
 : configure-transfer  ( -- )
    mmc?  if
       1-bit
@@ -660,15 +678,7 @@
       \ 1 for v1.10, and 2 for v2.
       get-scr c@  h# f and  0=  if  exit  then   \ acmd51

-      \ Ask if high-speed is supported
-      h# 00ff.fff1 switch-function d# 13 + c@  2  and  if   \ cmd6
-         h# 80ff.fff1 switch-function drop   \ Perform the switch  cmd6
-         \ Bump the host controller clock
-         host-high-speed  \ Changes the clock edge
-         card-clock-50
-      else
-         card-clock-25
-      then
+      set-speed
    then
 ;