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mmc: mediatek: fix SDIO IRQ interrupt handle flow

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SDIO IRQ is triggered by low level. It need disable SDIO IRQ
detected function. Otherwise the interrupt register can't be cleared.
It will process the interrupt more.

Signed-off-by: Jjian Zhou <jjian.zhou@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Fixes: 5215b2e952 ("mmc: mediatek: Add MMC_CAP_SDIO_IRQ support")
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
jjian zhou 2019-06-17 19:04:07 +08:00 committed by Ulf Hansson
parent b0e370b95a
commit 8a5df8ac62
1 changed files with 23 additions and 20 deletions
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43
drivers/mmc/host/mtk-sd.c
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@ -1375,24 +1375,25 @@ static void msdc_request_timeout(struct work_struct *work)
}
}
static void __msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb)
{
if (enb) {
sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
} else {
sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
}
}
static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
{
unsigned long flags;
struct msdc_host *host = mmc_priv(mmc);
spin_lock_irqsave(&host->lock, flags);
if (enb)
sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
else
sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
__msdc_enable_sdio_irq(host, enb);
spin_unlock_irqrestore(&host->lock, flags);
}
static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
{
struct msdc_host *host = mmc_priv(mmc);
__msdc_enable_sdio_irq(mmc, enb);
if (enb)
pm_runtime_get_noresume(host->dev);
@ -1414,6 +1415,8 @@ static irqreturn_t msdc_irq(int irq, void *dev_id)
spin_lock_irqsave(&host->lock, flags);
events = readl(host->base + MSDC_INT);
event_mask = readl(host->base + MSDC_INTEN);
if ((events & event_mask) & MSDC_INT_SDIOIRQ)
__msdc_enable_sdio_irq(host, 0);
/* clear interrupts */
writel(events & event_mask, host->base + MSDC_INT);
@ -1422,10 +1425,8 @@ static irqreturn_t msdc_irq(int irq, void *dev_id)
data = host->data;
spin_unlock_irqrestore(&host->lock, flags);
if ((events & event_mask) & MSDC_INT_SDIOIRQ) {
__msdc_enable_sdio_irq(host->mmc, 0);
if ((events & event_mask) & MSDC_INT_SDIOIRQ)
sdio_signal_irq(host->mmc);
}
if ((events & event_mask) & MSDC_INT_CDSC) {
if (host->internal_cd)
@ -1564,10 +1565,7 @@ static void msdc_init_hw(struct msdc_host *host)
sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
/* Config SDIO device detect interrupt function */
if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
else
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
/* Configure to default data timeout */
sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);
@ -2095,7 +2093,12 @@ static void msdc_hw_reset(struct mmc_host *mmc)
static void msdc_ack_sdio_irq(struct mmc_host *mmc)
{
__msdc_enable_sdio_irq(mmc, 1);
unsigned long flags;
struct msdc_host *host = mmc_priv(mmc);
spin_lock_irqsave(&host->lock, flags);
__msdc_enable_sdio_irq(host, 1);
spin_unlock_irqrestore(&host->lock, flags);
}
static int msdc_get_cd(struct mmc_host *mmc)