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Subject[PATCH v2 09/16] mmc: sdhci: Add quirk to disable HW timeout
Date
Add quirk to disable HW timeout if the requested timeout is more than
the maximum obtainable timeout.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/mmc/host/sdhci.c | 12 ++++++++++++
drivers/mmc/host/sdhci.h | 7 +++++++
2 files changed, 19 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 070aff9c108f..1aa74b4682f3 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -735,6 +735,12 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd)
DBG("Too large timeout 0x%x requested for CMD%d!\n",
count, cmd->opcode);
count = 0xE;
+ if (host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT) {
+ host->ier &= ~SDHCI_INT_DATA_TIMEOUT;
+ sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+ sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+ host->hw_timeout_disabled = true;
+ }
}

return count;
@@ -2349,6 +2355,12 @@ static bool sdhci_request_done(struct sdhci_host *host)
}

sdhci_del_timer(host, mrq);
+ if (sdhci_data_line_cmd(mrq->cmd) && host->hw_timeout_disabled) {
+ host->ier |= SDHCI_INT_DATA_TIMEOUT;
+ sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+ sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+ host->hw_timeout_disabled = false;
+ }

/*
* Always unmap the data buffers if they were mapped by
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index afab26fd70e6..3a967a56fcc3 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -437,6 +437,11 @@ struct sdhci_host {
#define SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN (1<<15)
/* Controller has CRC in 136 bit Command Response */
#define SDHCI_QUIRK2_RSP_136_HAS_CRC (1<<16)
+/*
+ * Disable HW timeout if the requested timeout is more than the maximum
+ * obtainable timeout
+ */
+#define SDHCI_QUIRK2_DISABLE_HW_TIMEOUT (1<<17)

int irq; /* Device IRQ */
void __iomem *ioaddr; /* Mapped address */
@@ -522,6 +527,8 @@ struct sdhci_host {
unsigned int ocr_avail_mmc;
u32 ocr_mask; /* available voltages */

+ bool hw_timeout_disabled;
+
unsigned timing; /* Current timing */

u32 thread_isr;
--
2.11.0
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