[U-Boot] [PATCH v0] mmc: forced sector mode when accessing OCR register
Jae hoon Chung
jh80.chung at gmail.com
Thu Nov 29 16:10:42 CET 2012
Hi,
i didn't understand why need to set by force?
Best Regards,
Jaehoon Chung
2012/11/29 Davide Bonfanti <davide.bonfanti at bticino.it>:
> Some eMMC require this setting to work properly.
> Tested on:
> - Toshiba THGBM2G8D8FBAIB (the one giving the problem)
> - Toshiba THGBM4G4D1HBAR
> - Micron MTFC4GMVEA
> - Hynix H26M64002BNR
> - SanDisk SDIN5E1-32G
>
>
> Signed-off-by: Davide Bonfanti <davide.bonfanti at bticino.it>
> ---
> drivers/mmc/mmc.c | 3 ++-
> include/mmc.h | 1 +
> 2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 5ffd8c5..cf66811 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -530,7 +530,8 @@ static int mmc_send_op_cond(struct mmc *mmc)
> cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
> (mmc->voltages &
> (cmd.response[0] & OCR_VOLTAGE_MASK)) |
> - (cmd.response[0] & OCR_ACCESS_MODE));
> + (cmd.response[0] & OCR_ACCESS_MODE)) |
> + OCR_ACCESS_SECTOR_MODE;
>
> if (mmc->host_caps & MMC_MODE_HC)
> cmd.cmdarg |= OCR_HCS;
> diff --git a/include/mmc.h b/include/mmc.h
> index a13e2bd..f1314d8 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -108,6 +108,7 @@
> #define OCR_HCS 0x40000000
> #define OCR_VOLTAGE_MASK 0x007FFF80
> #define OCR_ACCESS_MODE 0x60000000
> +#define OCR_ACCESS_SECTOR_MODE (1 << 30)
>
> #define SECURE_ERASE 0x80000000
>
> --
> 1.7.9.5
>
>
>
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