[OpenBIOS] r811 - dev/mmc/sdhci

[svn at openbios.org]

Author: wmb
Date: 2008-02-04 10:39:55 +0100 (Mon, 04 Feb 2008)
New Revision: 811

Modified:
   dev/mmc/sdhci/sdhci.fth
Log:
OLPC trac 6230 - Added count of simultaneous opens to sdhci.fth so that
multiple files can be open without losing the host controller when one file
is closed.


Modified: dev/mmc/sdhci/sdhci.fth
===================================================================
--- dev/mmc/sdhci/sdhci.fth	2008-02-02 20:52:14 UTC (rev 810)
+++ dev/mmc/sdhci/sdhci.fth	2008-02-04 09:39:55 UTC (rev 811)
@@ -587,17 +587,24 @@
    dma-len /block /
 ;
 
+0 value open-count
 : open  ( -- )
-   map-regs
-   setup-host
+   open-count 0=  if
+      map-regs
+      setup-host
+   then
+   open-count 1+ to open-count
    true
 ;
 
 : close  ( -- )
-   wait-write-done
-   card-clock-off
-   card-power-off
-   unmap-regs
+   open-count  1 =  if
+      wait-write-done
+      card-clock-off
+      card-power-off
+      unmap-regs
+   then
+   open-count 1- 0 max  to open-count
 ;
 
 : init   ( -- )