AS3525: enable access to the embedded SD card

Don't reset the peripherals
Don't mind about the spare register
Don't mind about MEMSTICK peripheral
Use correct clock speeds for IDE

Tested on Clip only

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19036 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 4 insertions, 19 deletions

diff --git a/firmware/target/arm/as3525/ata_sd_as3525.c b/firmware/target/arm/as3525/ata_sd_as3525.c
index 9c64a9614d..77d1ec1504 100644
--- a/firmware/target/arm/as3525/ata_sd_as3525.c
+++ b/firmware/target/arm/as3525/ata_sd_as3525.c
@@ -285,25 +285,10 @@ static void init_pl180_controller(const int drive)
 
 int sd_init(void)
 {
-    /* reset peripherals */
-
-    CCU_SRC =
-#ifdef HAVE_MULTIVOLUME
-        CCU_SRC_SDMCI_EN |
-#endif
-        CCU_SRC_NAF_EN | CCU_SRC_IDE_EN | CCU_SRC_IDE_AHB_EN | CCU_SRC_MST_EN;
-
-    CCU_SRL = CCU_SRL_MAGIC_NUMBER;
-    CCU_SRL = 0;
-
-    GPIOC_DIR &= ~(1<<1);
-    if(GPIOC_PIN(1))
-        CCU_SPARE1 |= 4;    /* sets bit 2 of undocumented register */
-    else
-        CCU_SPARE1 &= ~4;   /* or clear it */
-
-    CGU_IDE = (1<<7)|(1<<6);  /* enable, 24MHz clock */
-    CGU_MEMSTICK = (1<<8);    /* enable, 24MHz clock */
+    CGU_IDE =   (1<<7)  /* AHB interface enable */  |
+                (1<<6)  /* interface enable */      |
+                (2<<2)  /* clock didiver = 2+1 */   |
+                1       /* clock source = PLLA */;
 
     CGU_PERI |= CGU_NAF_CLOCK_ENABLE;
 #ifdef HAVE_MULTIVOLUME