On 7/04/21 12:46 pm, Jon Hunter wrote:
> From: Aniruddha Tvs Rao <anrao@xxxxxxxxxx>
>
> CMD8 is not supported with Command Queue Enabled. Add required callback
> to clear CQE_EN and CQE_INTR fields in the host controller register
> before sending CMD8. Add corresponding callback in the CQHCI resume path
> to re-enable CQE_EN and CQE_INTR fields.
>
> Reported-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
> Tested-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
> Signed-off-by: Aniruddha Tvs Rao <anrao@xxxxxxxxxx>
> Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-tegra.c | 32 ++++++++++++++++++++++++++++++++
> 1 file changed, 32 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index c61f797a853f..387ce9cdbd7c 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -119,6 +119,10 @@
> /* SDMMC CQE Base Address for Tegra Host Ver 4.1 and Higher */
> #define SDHCI_TEGRA_CQE_BASE_ADDR 0xF000
>
> +#define SDHCI_TEGRA_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \
> + SDHCI_TRNS_BLK_CNT_EN | \
> + SDHCI_TRNS_DMA)
> +
> struct sdhci_tegra_soc_data {
> const struct sdhci_pltfm_data *pdata;
> u64 dma_mask;
> @@ -1156,6 +1160,7 @@ static void tegra_sdhci_voltage_switch(struct sdhci_host *host)
> static void tegra_cqhci_writel(struct cqhci_host *cq_host, u32 val, int reg)
> {
> struct mmc_host *mmc = cq_host->mmc;
> + struct sdhci_host *host = mmc_priv(mmc);
> u8 ctrl;
> ktime_t timeout;
> bool timed_out;
> @@ -1170,6 +1175,7 @@ static void tegra_cqhci_writel(struct cqhci_host *cq_host, u32 val, int reg)
> */
> if (reg == CQHCI_CTL && !(val & CQHCI_HALT) &&
> cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT) {
> + sdhci_writew(host, SDHCI_TEGRA_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE);
> sdhci_cqe_enable(mmc);
> writel(val, cq_host->mmio + reg);
> timeout = ktime_add_us(ktime_get(), 50);
> @@ -1205,6 +1211,7 @@ static void sdhci_tegra_update_dcmd_desc(struct mmc_host *mmc,
> static void sdhci_tegra_cqe_enable(struct mmc_host *mmc)
> {
> struct cqhci_host *cq_host = mmc->cqe_private;
> + struct sdhci_host *host = mmc_priv(mmc);
> u32 val;
>
> /*
> @@ -1218,6 +1225,7 @@ static void sdhci_tegra_cqe_enable(struct mmc_host *mmc)
> if (val & CQHCI_ENABLE)
> cqhci_writel(cq_host, (val & ~CQHCI_ENABLE),
> CQHCI_CFG);
> + sdhci_writew(host, SDHCI_TEGRA_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE);
> sdhci_cqe_enable(mmc);
> if (val & CQHCI_ENABLE)
> cqhci_writel(cq_host, val, CQHCI_CFG);
> @@ -1281,12 +1289,36 @@ static void tegra_sdhci_set_timeout(struct sdhci_host *host,
> __sdhci_set_timeout(host, cmd);
> }
>
> +static void sdhci_tegra_cqe_pre_enable(struct mmc_host *mmc)
> +{
> + struct cqhci_host *cq_host = mmc->cqe_private;
> + u32 reg;
> +
> + reg = cqhci_readl(cq_host, CQHCI_CFG);
> + reg |= CQHCI_ENABLE;
> + cqhci_writel(cq_host, reg, CQHCI_CFG);
> +}
> +
> +static void sdhci_tegra_cqe_post_disable(struct mmc_host *mmc)
> +{
> + struct cqhci_host *cq_host = mmc->cqe_private;
> + struct sdhci_host *host = mmc_priv(mmc);
> + u32 reg;
> +
> + reg = cqhci_readl(cq_host, CQHCI_CFG);
> + reg &= ~CQHCI_ENABLE;
> + cqhci_writel(cq_host, reg, CQHCI_CFG);
> + sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
> +}
> +
> static const struct cqhci_host_ops sdhci_tegra_cqhci_ops = {
> .write_l = tegra_cqhci_writel,
> .enable = sdhci_tegra_cqe_enable,
> .disable = sdhci_cqe_disable,
> .dumpregs = sdhci_tegra_dumpregs,
> .update_dcmd_desc = sdhci_tegra_update_dcmd_desc,
> + .pre_enable = sdhci_tegra_cqe_pre_enable,
> + .post_disable = sdhci_tegra_cqe_post_disable,
> };
>
> static int tegra_sdhci_set_dma_mask(struct sdhci_host *host)
>
