Convert to use the more lightweight method for processing SDIO IRQs, which
involves the following changes:
- Enable MMC_CAP2_SDIO_IRQ_NOTHREAD when SDIO IRQ is supported.
- Mask SDIO IRQ when signaling it for processing.
- Re-enable (unmask) the SDIO IRQ from the ->ack_sdio_irq() callback.
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
drivers/mmc/host/dw_mmc.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 249ded6..f086791 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1635,9 +1635,8 @@ static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card)
}
}
-static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
+static void __dw_mci_enable_sdio_irq(struct dw_mci_slot *slot, int enb)
{
- struct dw_mci_slot *slot = mmc_priv(mmc);
struct dw_mci *host = slot->host;
unsigned long irqflags;
u32 int_mask;
@@ -1655,6 +1654,20 @@ static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
spin_unlock_irqrestore(&host->irq_lock, irqflags);
}
+static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
+{
+ struct dw_mci_slot *slot = mmc_priv(mmc);
+
+ __dw_mci_enable_sdio_irq(slot, enb);
+}
+
+static void dw_mci_ack_sdio_irq(struct mmc_host *mmc)
+{
+ struct dw_mci_slot *slot = mmc_priv(mmc);
+
+ __dw_mci_enable_sdio_irq(slot, 1);
+}
+
static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct dw_mci_slot *slot = mmc_priv(mmc);
@@ -1756,6 +1769,7 @@ static const struct mmc_host_ops dw_mci_ops = {
.get_cd = dw_mci_get_cd,
.hw_reset = dw_mci_hw_reset,
.enable_sdio_irq = dw_mci_enable_sdio_irq,
+ .ack_sdio_irq = dw_mci_ack_sdio_irq,
.execute_tuning = dw_mci_execute_tuning,
.card_busy = dw_mci_card_busy,
.start_signal_voltage_switch = dw_mci_switch_voltage,
@@ -2645,9 +2659,14 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
continue;
if (pending & SDMMC_INT_SDIO(slot->sdio_id)) {
+ u32 int_mask;
+
mci_writel(host, RINTSTS,
SDMMC_INT_SDIO(slot->sdio_id));
- mmc_signal_sdio_irq(slot->mmc);
+ int_mask = mci_readl(host, INTMASK);
+ int_mask &= ~SDMMC_INT_SDIO(slot->sdio_id);
+ mci_writel(host, INTMASK, int_mask);
+ sdio_signal_irq(slot->mmc);
}
}
@@ -2748,6 +2767,10 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
if (ret)
goto err_host_allocated;
+ /* Process SDIO IRQs through the sdio_irq_work. */
+ if (mmc->caps & MMC_CAP_SDIO_IRQ)
+ mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
+
/* Useful defaults if platform data is unset. */
if (host->use_dma == TRANS_MODE_IDMAC) {
mmc->max_segs = host->ring_size;
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
