From a043d9a591a04c431d9560df0882ce5ed5b3e9be Mon Sep 17 00:00:00 2001
From: mcuelenaere <mcuelenaere@a1c6a512-1295-4272-9138-f99709370657>
Date: Sun, 3 Jan 2010 17:32:15 +0000
Subject: [PATCH] Onda VX747/VX777: only enable SD clock when transferring data

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24172 a1c6a512-1295-4272-9138-f99709370657
---
 .../target/mips/ingenic_jz47xx/ata-sd-jz4740.c     | 27 +++++++++++++++-------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/firmware/target/mips/ingenic_jz47xx/ata-sd-jz4740.c b/firmware/target/mips/ingenic_jz47xx/ata-sd-jz4740.c
index 8c1c335c1..b558c4f87 100644
--- a/firmware/target/mips/ingenic_jz47xx/ata-sd-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/ata-sd-jz4740.c
@@ -1216,6 +1216,7 @@ static int sd_init_device(void)
     while((retval = sd_init_card_state(&init_req)) == SD_INIT_DOING);
     retval = (retval == SD_INIT_PASSED ? sd_select_card() : -1);
 
+    __cpm_stop_msc(); /* disable SD clock */
     mutex_unlock(&sd_mtx);
 
     return retval;
@@ -1250,13 +1251,26 @@ tCardInfo* card_get_info_target(int card_no)
     return &card;
 }
 
+static inline void sd_start_transfer(void)
+{
+    mutex_lock(&sd_mtx);
+    __cpm_start_msc();
+    led(true);
+}
+
+static inline void sd_stop_transfer(void)
+{
+    led(false);
+    __cpm_stop_msc();
+    mutex_unlock(&sd_mtx);
+}
+
 int sd_read_sectors(IF_MV2(int drive,) unsigned long start, int count, void* buf)
 {
 #ifdef HAVE_MULTIVOLUME
     (void)drive;
 #endif
-    mutex_lock(&sd_mtx);
-    led(true);
+    sd_start_transfer();
 
     struct sd_request request;
     struct sd_response_r1 r1;
@@ -1300,8 +1314,7 @@ int sd_read_sectors(IF_MV2(int drive,) unsigned long start, int count, void* buf
         goto err;
 
 err:
-    led(false);
-    mutex_unlock(&sd_mtx);
+    sd_stop_transfer();
 
     return retval;
 }
@@ -1311,8 +1324,7 @@ int sd_write_sectors(IF_MV2(int drive,) unsigned long start, int count, const vo
 #ifdef HAVE_MULTIVOLUME
     (void)drive;
 #endif
-    mutex_lock(&sd_mtx);
-    led(true);
+    sd_start_transfer();
 
     struct sd_request request;
     struct sd_response_r1 r1;
@@ -1357,8 +1369,7 @@ int sd_write_sectors(IF_MV2(int drive,) unsigned long start, int count, const vo
         goto err;
 
 err:
-    led(false);
-    mutex_unlock(&sd_mtx);
+    sd_stop_transfer();
 
     return retval;
 }
-- 
2.11.4.GIT