sd-as3525v2: delay a bit before reading the command response

Especially when using caches we might read the response too fast and get
the response for the previous command instead.

Now Clip+ boots fine with both instruction & data caches enabled, the
delay might need to be lowered though: boot time is a bit longer.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25183 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 3 insertions, 0 deletions

diff --git a/firmware/target/arm/as3525/sd-as3525v2.c b/firmware/target/arm/as3525/sd-as3525v2.c
index 9175ef0f09..94b46017da 100644
--- a/firmware/target/arm/as3525/sd-as3525v2.c
+++ b/firmware/target/arm/as3525/sd-as3525v2.c
@@ -377,6 +377,9 @@ static bool send_cmd(const int cmd, const int arg, const int flags,
 
     if(flags & MCI_RESP)
     {
+        mci_delay(); /* if we read the response too fast we might read the
+                      * response of the previous command instead */
+
         if(flags & MCI_LONG_RESP)
         {
             /* store the response in little endian order for the words */