From: Hiroyuki Yokoyama hiroyuki.yokoyama.vx@renesas.com
In R-Car Gen 3, there is a DMA controller restriction of SDHI. When the transfer exceeding the 4 kByte boundary is performed while the DRAM address is not 128 byte aligned, the bus is occupied. This patch avoids this.
Signed-off-by: Hiroyuki Yokoyama hiroyuki.yokoyama.vx@renesas.com Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Masahiro Yamada yamada.masahiro@socionext.com --- drivers/mmc/tmio-common.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c index faf18191b3..1dc13db9ea 100644 --- a/drivers/mmc/tmio-common.c +++ b/drivers/mmc/tmio-common.c @@ -358,14 +358,16 @@ static int tmio_sd_dma_xfer(struct udevice *dev, struct mmc_data *data) }
/* check if the address is DMA'able */ -static bool tmio_sd_addr_is_dmaable(const char *src) +static bool tmio_sd_addr_is_dmaable(struct mmc_data *data) { - uintptr_t addr = (uintptr_t)src; + uintptr_t addr = (uintptr_t)data->src;
if (!IS_ALIGNED(addr, TMIO_SD_DMA_MINALIGN)) return false;
#if defined(CONFIG_RCAR_GEN3) + if (!(data->flags & MMC_DATA_READ) && !IS_ALIGNED(addr, 128)) + return false; /* Gen3 DMA has 32bit limit */ if (addr >> 32) return false; @@ -480,7 +482,7 @@ int tmio_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, if (data) { /* use DMA if the HW supports it and the buffer is aligned */ if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL && - tmio_sd_addr_is_dmaable(data->src)) + tmio_sd_addr_is_dmaable(data)) ret = tmio_sd_dma_xfer(dev, data); else ret = tmio_sd_pio_xfer(dev, cmd, data);