mirror of
https://github.com/brain-hackers/u-boot-brain
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b71ea33699
- Timeout counter value is set as DTOCV bits in SYSCTL register For counter value set as timeout, Timeout period = (2^(timeout + 13)) SD Clock cycles - As per 4.6.2.2 section of SD Card specification v2.00, host should cofigure timeout period value to minimum 0.25 sec. - Number of SD Clock cycles for 0.25sec should be minimum (SD Clock/sec * 0.25 sec) SD Clock cycles = (mmc->tran_speed * 1/4) SD Clock cycles - Calculating timeout based on (2^(timeout + 13)) >= mmc->tran_speed * 1/4 Taking log2 both the sides and rounding up to next power of 2 => timeout + 13 = log2(mmc->tran_speed/4) + 1 Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com> Acked-by: Mingkai Hu <Mingkai.Hu@freescale.com> Tested-by: Stefano Babic <sbabic@denx.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> |
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| .. | ||
| atmel_mci.c | ||
| atmel_mci.h | ||
| bfin_sdh.c | ||
| davinci_mmc.c | ||
| fsl_esdhc.c | ||
| gen_atmel_mci.c | ||
| Makefile | ||
| mmc.c | ||
| mxcmmc.c | ||
| omap3_mmc.c | ||
| omap3_mmc.h | ||
| omap_hsmmc.c | ||
| pxa_mmc.c | ||
| pxa_mmc.h | ||
| s5p_mmc.c | ||