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AMS Sansa: FS#10669 Reimplement Voltage scaling.

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Reimplement voltage scaling on AMS Sansas at 1.10v during unboosted operation to improve runtimes.  The voltage is now also boosted during disk access if a µSD is present.  This prevents the µSD problems we saw on the last implementation.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23193 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2009-10-15 19:48:26 +00:00
parent 2b94830112
commit 562e41bae5
2 changed files with 24 additions and 4 deletions
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21
firmware/target/arm/as3525/ata_sd_as3525.c
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@ -812,6 +812,11 @@ void sd_enable(bool on)
#if defined(HAVE_BUTTON_LIGHT) && defined(HAVE_MULTIDRIVE)
extern int buttonlight_is_on;
#endif
#ifdef HAVE_HOTSWAP
static bool cpu_boosted = false;
#endif
if (sd_enabled == on)
return; /* nothing to do */
if(on)
@ -830,6 +835,14 @@ void sd_enable(bool on)
CGU_IDE |= (1<<7) /* AHB interface enable */ |
(1<<6) /* interface enable */;
sd_enabled = true;
#ifdef HAVE_HOTSWAP
if(card_detect_target()) /* If SD card present Boost cpu for voltage */
{
cpu_boosted = true;
cpu_boost(true);
}
#endif
}
else
{
@ -844,6 +857,14 @@ void sd_enable(bool on)
#endif /* HAVE_MULTIDRIVE */
CGU_IDE &= ~((1<<7)|(1<<6));
sd_enabled = false;
#ifdef HAVE_HOTSWAP
if(cpu_boosted)
{
cpu_boost(false);
cpu_boosted = false;
}
#endif
}
}