Date: Tue, 19 Feb 2013 20:33:55 +0000 (UTC) From: Oleksandr Tymoshenko <gonzo@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r247009 - head/sys/arm/broadcom/bcm2835 Message-ID: <201302192033.r1JKXt6R078206@svn.freebsd.org>
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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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