Re: [PATCH 4/7] mmc: sdhci: Add quirk for disabling DTO during erase command

Adrian Hunter
2019-01-24T12:08:48Z

On 11/01/19 1:08 PM, Faiz Abbas wrote:
> Some controllers might prematurely issue a data timeout during an erase
> command. Add a quirk to disable the interrupt when an erase command is
> issued.

I might have already asked this, but would it be possible to use the
existing SDHCI_QUIRK2_DISABLE_HW_TIMEOUT quirk?

>
> Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
> ---
> drivers/mmc/host/sdhci.c | 8 ++++++++
> drivers/mmc/host/sdhci.h | 2 ++
> 2 files changed, 10 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 4a9044c06e21..cfd716aee552 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1560,6 +1560,14 @@ void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
> /* Initially, a command has no error */
> cmd->error = 0;
>
> + if (cmd->opcode == MMC_ERASE &&
> + (host->quirks2 & SDHCI_QUIRK2_DISABLE_DTO_FOR_ERASE)) {
> + mask = sdhci_readl(host, SDHCI_INT_ENABLE);
> + mask &= ~SDHCI_INT_DATA_TIMEOUT;
> + sdhci_writel(host, mask, SDHCI_INT_ENABLE);
> + sdhci_writel(host, mask, SDHCI_SIGNAL_ENABLE);
> + }
> +
> if ((host->quirks2 & SDHCI_QUIRK2_STOP_WITH_TC) &&
> cmd->opcode == MMC_STOP_TRANSMISSION)
> cmd->flags |= MMC_RSP_BUSY;
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index 7a52823ebef4..d0c6d4fe5371 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -479,6 +479,8 @@ struct sdhci_host {
> * block count.
> */
> #define SDHCI_QUIRK2_USE_32BIT_BLK_CNT (1<<18)
> +/* Controller needs to disable DTO for erase command */
> +#define SDHCI_QUIRK2_DISABLE_DTO_FOR_ERASE (1<<19)
>
> int irq; /* Device IRQ */
> void __iomem *ioaddr; /* Mapped address */
>