Accept FS#7134 - Sansa: external sd card support by Antonius Hellmann with some tweaks. All testers have given the green light. (Now for the RED ?? ;).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13741 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 58 insertions, 0 deletions

diff --git a/firmware/hotswap.c b/firmware/hotswap.c
new file mode 100644
index 0000000000..5620edf10b
--- /dev/null
+++ b/firmware/hotswap.c
@@ -0,0 +1,58 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2004 by Jens Arnold
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdbool.h>
+#include "config.h"
+#ifdef TARGET_TREE
+#include "hotswap-target.h"
+#else
+#include "ata_mmc.h"
+#endif
+
+/* helper function to extract n (<=32) bits from an arbitrary position.
+   counting from MSB to LSB */
+unsigned long card_extract_bits(
+    const unsigned long *p, /* the start of the bitfield array */
+    unsigned int start,     /* bit no. to start reading  */
+    unsigned int size)      /* how many bits to read */
+{
+    unsigned int long_index = start / 32;
+    unsigned int bit_index = start % 32;
+    unsigned long result;
+    
+    result = p[long_index] << bit_index;
+
+    if (bit_index + size > 32)    /* crossing longword boundary */
+        result |= p[long_index+1] >> (32 - bit_index);
+        
+    result >>= 32 - size;
+
+    return result;
+}
+
+#ifdef TARGET_TREE
+bool card_detect(void)
+{
+    return card_detect_target();
+}
+
+tCardInfo *card_get_info(int card_no)
+{
+    return card_get_info_target(card_no);
+}
+#endif