[PATCH v2 5/8] mmc: sdhci: Add quirk for disabling DTO during erase command

Faiz Abbas
2019-02-15T19:20:30Z

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 2f5f64efad16..608f7306742c 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1522,6 +1522,11 @@ 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 ((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 6ff3e29791ee..60282721f827 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 */
--
2.19.2