diff options
Diffstat (limited to 'sys/arm/broadcom/bcm2835/bcm2835_sdhci.c')
| -rw-r--r-- | sys/arm/broadcom/bcm2835/bcm2835_sdhci.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c b/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c index 14422e2..cfba2cd 100644 --- a/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c +++ b/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c @@ -78,6 +78,17 @@ __FBSDID("$FreeBSD$"); #define dprintf(fmt, args...) #endif +/* + * 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 + */ +static int bcm2835_sdhci_min_freq = 400000; +static int bcm2835_sdhci_hs = 1; + +TUNABLE_INT("hw.bcm2835.sdhci.min_freq", &bcm2835_sdhci_min_freq); +TUNABLE_INT("hw.bcm2835.sdhci.hs", &bcm2835_sdhci_hs); + struct bcm_sdhci_dmamap_arg { bus_addr_t sc_dma_busaddr; }; @@ -180,7 +191,9 @@ bcm_sdhci_attach(device_t dev) goto fail; } - sc->sc_slot.caps = SDHCI_CAN_VDD_330 | SDHCI_CAN_VDD_180 | SDHCI_CAN_DO_HISPD; + sc->sc_slot.caps = SDHCI_CAN_VDD_330 | SDHCI_CAN_VDD_180; + if (bcm2835_sdhci_hs) + sc->sc_slot.caps |= SDHCI_CAN_DO_HISPD; sc->sc_slot.caps |= (default_freq << SDHCI_CLOCK_BASE_SHIFT); sc->sc_slot.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL @@ -334,6 +347,13 @@ bcm_sdhci_write_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, bus_space_write_multi_4(sc->sc_bst, sc->sc_bsh, off, data, count); } +static uint32_t +bcm_sdhci_min_freq(device_t dev, struct sdhci_slot *slot) +{ + + return bcm2835_sdhci_min_freq; +} + static device_method_t bcm_sdhci_methods[] = { /* Device interface */ DEVMETHOD(device_probe, bcm_sdhci_probe), @@ -353,6 +373,7 @@ static device_method_t bcm_sdhci_methods[] = { DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host), /* SDHCI registers accessors */ + DEVMETHOD(sdhci_min_freq, bcm_sdhci_min_freq), DEVMETHOD(sdhci_read_1, bcm_sdhci_read_1), DEVMETHOD(sdhci_read_2, bcm_sdhci_read_2), DEVMETHOD(sdhci_read_4, bcm_sdhci_read_4), |
