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Since r273264 the SD card detection on Raspberry Pi is reliably working and

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that expose new bugs with HS mode.

When the old code could not do the proper card detection it would boot with
lower defaults (and no HS mode) and this makes some HS cards boots.

Now, with the card always identified as HS capable, the sdhci controller
tries to run the card at HS speeds and makes the boot always fail.

Disable the HS mode for now (which still can be enabled with the tunable)
until it is properly fixed.

MFC with:	r273264
Requested by:	many
This commit is contained in:
Luiz Otavio O Souza 2014-11-11 23:55:37 +00:00
parent efe28398f5
commit bea71143ed
1 changed files with 5 additions and 2 deletions
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7
sys/arm/broadcom/bcm2835/bcm2835_sdhci.c
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@ -84,10 +84,13 @@ __FBSDID("$FreeBSD$");
/*
* Arasan HC seems to have problem with Data CRC on lower frequencies.
* Use this tunable to cap initialization sequence frequency at higher
* value. Default is standard 400kHz
* value. Default is standard 400kHz.
* HS mode brings too many problems for most of cards, so disable HS mode
* until a better fix comes up.
* HS mode still can be enabled with the tunable.
*/
static int bcm2835_sdhci_min_freq = 400000;
static int bcm2835_sdhci_hs = 1;
static int bcm2835_sdhci_hs = 0;
static int bcm2835_sdhci_pio_mode = 0;
TUNABLE_INT("hw.bcm2835.sdhci.min_freq", &bcm2835_sdhci_min_freq);