Author: gonzo
Date: Tue Feb 19 20:33:55 2013
New Revision: 247009
URL: http://svnweb.freebsd.org/changeset/base/247009
Log:
Roll back change of frequency for initialization sequence since it
seems to cause more problems then previous behavior: it either breaks
initilization sequence in other places or uncovers problems with
high-speed mode timing for SDHCI 3.0
Modified:
head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c
Modified: head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c Tue Feb 19 19:25:50
2013 (r247008)
+++ head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c Tue Feb 19 20:33:55
2013 (r247009)
@@ -78,7 +78,12 @@ __FBSDID("$FreeBSD$");
#define dprintf(fmt, args...)
#endif
-static int bcm2835_sdhci_min_freq = 8000000;
+/*
+ * Arasan HC seems to have problem with Data CRC on lower frequencies.
+ * Use this tunable to cap intilization sequence frequency at higher
+ * value. Default is standard 400KHz
+ */
+static int bcm2835_sdhci_min_freq = 400000;
static int bcm2835_sdhci_hs = 1;
TUNABLE_INT("hw.bcm2835.sdhci.min_freq", &bcm2835_sdhci_min_freq);
@@ -346,12 +351,6 @@ static uint32_t
bcm_sdhci_min_freq(device_t dev, struct sdhci_slot *slot)
{
- /*
- * Arasan HC seems to have problem with
- * Data CRC on lower frequencies. Cap minimum
- * frequncy at 8MHz (or whatever set via tunable)
- * to work around this issue
- */
return bcm2835_sdhci_min_freq;
}
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