On 15/06/18 05:04, Chunyan Zhang wrote:
> According to the SD host controller specification version 4.10, when
> Host Version 4 is enabled, SDMA uses ADMA System Address register
> (05Fh-058h) instead of using SDMA System Address register to
> support both 32-bit and 64-bit addressing.
>
> Signed-off-by: Chunyan Zhang <zhang.chunyan@xxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index cf5695f..f57201f 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -805,6 +805,7 @@ static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
> static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
> {
> u8 ctrl;
> + u32 reg;
reg could just be an int.
> struct mmc_data *data = cmd->data;
>
> if (sdhci_data_line_cmd(cmd))
> @@ -894,8 +895,10 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
> SDHCI_ADMA_ADDRESS_HI);
> } else {
> WARN_ON(sg_cnt != 1);
> + reg = host->v4_mode ? SDHCI_ADMA_ADDRESS :
> + SDHCI_DMA_ADDRESS;
> sdhci_writel(host, sdhci_sdma_address(host),
> - SDHCI_DMA_ADDRESS);
> + reg);
Shouldn't we support 64-bit SDMA in version 4 mode?
> }
> }
>
> @@ -2721,6 +2724,7 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
> */
> if (intmask & SDHCI_INT_DMA_END) {
> u32 dmastart, dmanow;
> + u32 reg;
>
> dmastart = sdhci_sdma_address(host);
> dmanow = dmastart + host->data->bytes_xfered;
> @@ -2733,7 +2737,9 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
> host->data->bytes_xfered = dmanow - dmastart;
> DBG("DMA base 0x%08x, transferred 0x%06x bytes, next 0x%08x\n",
> dmastart, host->data->bytes_xfered, dmanow);
> - sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
> + reg = host->v4_mode ? SDHCI_ADMA_ADDRESS :
> + SDHCI_DMA_ADDRESS;
> + sdhci_writel(host, dmanow, reg);
Shouldn't we support 64-bit SDMA in version 4 mode?
> }
>
> if (intmask & SDHCI_INT_DATA_END) {
>
--
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