From: Marek Vasut Date: Mon, 18 Mar 2019 22:43:10 +0000 (+0100) Subject: mmc: tmio: Clamp SD_SECCNT to 16bit values on 16bit IP X-Git-Tag: v2019.04~19^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c453fe3a0513f758c7d0b580307909637eb31c9f;p=platform%2Fkernel%2Fu-boot.git mmc: tmio: Clamp SD_SECCNT to 16bit values on 16bit IP On 16bit variants of the TMIO SD IP, the SECCNT register can only be programmed to 16bit values, while on the 32bit and 64bit variants it can be programmed to 32bit values. The SECCNT register indicates the maximum number of blocks in a continuous transfer. Hence, limit the maximum continuous transfer block count to 65535 blocks on 16bit variants of the TMIO IP and to BIT(32)-1 blocks on 32bit and 64bit variants. Signed-off-by: Marek Vasut Cc: Masahiro Yamada --- diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c index 01d8c2b..812205a 100644 --- a/drivers/mmc/tmio-common.c +++ b/drivers/mmc/tmio-common.c @@ -783,7 +783,10 @@ int tmio_sd_probe(struct udevice *dev, u32 quirks) plat->cfg.f_min = mclk / (priv->caps & TMIO_SD_CAP_DIV1024 ? 1024 : 512); plat->cfg.f_max = mclk; - plat->cfg.b_max = U32_MAX; /* max value of TMIO_SD_SECCNT */ + if (quirks & TMIO_SD_CAP_16BIT) + plat->cfg.b_max = U16_MAX; /* max value of TMIO_SD_SECCNT */ + else + plat->cfg.b_max = U32_MAX; /* max value of TMIO_SD_SECCNT */ upriv->mmc = &plat->mmc;