From: Adrian Hunter <adrian.hunter@intel.com>
To: Faiz Abbas <faiz_abbas@ti.com>,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-mmc@vger.kernel.org
Cc: kishon@ti.com, mark.rutland@arm.com, robh+dt@kernel.org,
ulf.hansson@linaro.org, zhang.chunyan@linaro.org,
tony@atomide.com
Subject: Re: [PATCH v3 4/7] mmc: sdhci: Add quirk for disabling DTO during erase command
Date: Fri, 13 Dec 2019 11:40:03 +0200 [thread overview]
Message-ID: <003f7e7a-a762-5355-9404-4a6655754fb0@intel.com> (raw)
In-Reply-To: <20191210095151.15441-5-faiz_abbas@ti.com>
On 10/12/19 11:51 am, 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.
>
> Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
> ---
> drivers/mmc/host/sdhci.c | 5 +++++
> drivers/mmc/host/sdhci.h | 2 ++
> 2 files changed, 7 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 6f3d4991bee1..b8934c50b9c4 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1532,6 +1532,11 @@ 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)) {
> + sdhci_set_data_timeout_irq(host, false);
> + }
If you factor out __sdhci_set_timeout() like below then
you could implement ->set_timeout() to do this.
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index ad6d2f93aa0b..389e3239eadc 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1002,27 +1002,28 @@ static void sdhci_set_data_timeout_irq(struct sdhci_host *host, bool enable)
sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
}
-static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
+void __sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
{
- u8 count;
-
- if (host->ops->set_timeout) {
- host->ops->set_timeout(host, cmd);
- } else {
- bool too_big = false;
-
- count = sdhci_calc_timeout(host, cmd, &too_big);
+ bool too_big = false;
+ u8 count = sdhci_calc_timeout(host, cmd, &too_big);
+
+ if (too_big && host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT) {
+ sdhci_calc_sw_timeout(host, cmd);
+ sdhci_set_data_timeout_irq(host, false);
+ } else if (!(host->ier & SDHCI_INT_DATA_TIMEOUT)) {
+ sdhci_set_data_timeout_irq(host, true);
+ }
- if (too_big &&
- host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT) {
- sdhci_calc_sw_timeout(host, cmd);
- sdhci_set_data_timeout_irq(host, false);
- } else if (!(host->ier & SDHCI_INT_DATA_TIMEOUT)) {
- sdhci_set_data_timeout_irq(host, true);
- }
+ sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
+}
+EXPORT_SYMBOL_GPL(__sdhci_set_timeout);
- sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
- }
+static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
+{
+ if (host->ops->set_timeout)
+ host->ops->set_timeout(host, cmd);
+ else
+ __sdhci_set_timeout(host, cmd);
}
static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
> +
> 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 b28706a1bc6f..beda9afba3a6 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -482,6 +482,8 @@ 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 */
>
next prev parent reply other threads:[~2019-12-13 9:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-10 9:51 [PATCH v3 0/7] Port am335 and am437 devices to sdhci-omap Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 1/7] dt-bindings: sdhci-omap: Add properties for using external dma Faiz Abbas
2019-12-18 21:39 ` Rob Herring
2019-12-10 9:51 ` [PATCH v3 2/7] mmc: sdhci: add support for using external DMA devices Faiz Abbas
2019-12-12 12:55 ` Adrian Hunter
2019-12-16 8:27 ` Faiz Abbas
2019-12-16 13:45 ` Adrian Hunter
2019-12-23 14:25 ` Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 3/7] mmc: sdhci-omap: Add using external dma Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 4/7] mmc: sdhci: Add quirk for disabling DTO during erase command Faiz Abbas
2019-12-13 9:40 ` Adrian Hunter [this message]
2019-12-16 8:42 ` Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 5/7] mmc: sdhci-omap: Add DISABLE_DTO_FOR_ERASE Quirk Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 6/7] dt-bindings: sdhci-omap: Add am335x and am437x specific bindings Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 7/7] mmc: sdhci-omap: Add am335x and am437x specific compatibles Faiz Abbas
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