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Sansa AMS: Use some new macros to set the MCICLK frequency to help avoid missing the bypass bit when resetting frequencies with MCI_CLOCK register.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23831 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2009-12-03 17:22:09 +00:00
parent 40629be046
commit 7f88cc44aa
1 changed files with 10 additions and 5 deletions
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15
firmware/target/arm/as3525/ata_sd_as3525.c
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@ -248,6 +248,11 @@ static bool send_cmd(const int drive, const int cmd, const int arg,
return false;
}
#define MCI_FULLSPEED (MCI_CLOCK_ENABLE | MCI_CLOCK_BYPASS) /* MCLK */
#define MCI_HALFSPEED (MCI_CLOCK_ENABLE) /* MCLK/2 */
#define MCI_QUARTERSPEED (MCI_CLOCK_ENABLE | 1) /* MCLK/4 */
#define MCI_IDENTSPEED (MCI_CLOCK_ENABLE | AS3525_SD_IDENT_DIV) /* IDENT */
static int sd_init_card(const int drive)
{
unsigned long response;
@ -258,7 +263,7 @@ static int sd_init_card(const int drive)
/* MCLCK on and set to 400kHz ident frequency */
MCI_CLOCK(drive) = MCI_CLOCK_ENABLE | AS3525_SD_IDENT_DIV;
MCI_CLOCK(drive) = MCI_IDENTSPEED;
/* 100 - 400kHz clock required for Identification Mode */
/* Start of Card Identification Mode ************************************/
@ -307,11 +312,11 @@ static int sd_init_card(const int drive)
/* End of Card Identification Mode ************************************/
/* full speed for controller clock MCICLK = MCLK = PCLK = 62 MHz */
MCI_CLOCK(drive) |= MCI_CLOCK_BYPASS; /* FIXME: 50 MHz is spec limit */
mci_delay();
/* Boost MCICLK to operating speed */ /* FIXME: 50 MHz is spec limit */
MCI_CLOCK(drive) = (sd_v2 ? MCI_FULLSPEED : MCI_FULLSPEED);
#ifdef HAVE_MULTIDRIVE /* The internal SDs are v1 */
#ifdef HAVE_MULTIDRIVE
/* Try to switch V2 cards to HS timings, non HS seem to ignore this */
if(sd_v2)
{