From 32dba73772f8bf156bb3bd002b3334178a43032f Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Tue, 18 Apr 2017 13:29:20 +0200 Subject: [PATCH] mmc: dw_mmc: Convert to use MMC_CAP2_SDIO_IRQ_NOTHREAD for SDIO IRQs 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 and use sdio_signal_irq() instead of mmc_signal_sdio_irq(). - Mask the SDIO IRQ before signaling a new one to be processed. - Implement the ->ack_sdio_irq() callback to unmask the SDIO IRQ. Signed-off-by: Ulf Hansson Tested-by: Douglas Anderson Reviewed-by: Douglas Anderson --- drivers/mmc/host/dw_mmc.c | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index e45129f48174..635d76cd1ef0 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1642,9 +1642,8 @@ 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; @@ -1662,6 +1661,20 @@ 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); @@ -1763,6 +1776,7 @@ 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, @@ -2654,7 +2668,8 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) if (pending & SDMMC_INT_SDIO(slot->sdio_id)) { mci_writel(host, RINTSTS, SDMMC_INT_SDIO(slot->sdio_id)); - mmc_signal_sdio_irq(slot->mmc); + __dw_mci_enable_sdio_irq(slot, 0); + sdio_signal_irq(slot->mmc); } } @@ -2755,6 +2770,10 @@ 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; -- 2.45.2