mxcmmc: add card detect through DAT3 possibility

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/plat-mxc/include/mach/mmc.h b/arch/arm/plat-mxc/include/mach/mmc.h
index de2128d..29115f4 100644 (file)
--- a/arch/arm/plat-mxc/include/mach/mmc.h
+++ b/arch/arm/plat-mxc/include/mach/mmc.h
@@ -31,6 +31,9 @@ struct imxmmc_platform_data {
 
        /* adjust slot voltage */
        void (*setpower)(struct device *, unsigned int vdd);
+
+       /* enable card detect using DAT3 */
+       int dat3_card_detect;
 };
 
 #endif

diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index ec18e3b..74c87e0 100644 (file)
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -119,6 +119,7 @@ struct mxcmci_host {
        int                     detect_irq;
        int                     dma;
        int                     do_dma;
+       int                     default_irq_mask;
        int                     use_sdio;
        unsigned int            power_mode;
        struct imxmmc_platform_data *pdata;
@@ -228,7 +229,7 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
 static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd,
                unsigned int cmdat)
 {
-       u32 int_cntr;
+       u32 int_cntr = host->default_irq_mask;
        unsigned long flags;
 
        WARN_ON(host->cmd != NULL);
@@ -275,7 +276,7 @@ static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd,
 static void mxcmci_finish_request(struct mxcmci_host *host,
                struct mmc_request *req)
 {
-       u32 int_cntr = 0;
+       u32 int_cntr = host->default_irq_mask;
        unsigned long flags;
 
        spin_lock_irqsave(&host->lock, flags);
@@ -585,6 +586,9 @@ static irqreturn_t mxcmci_irq(int irq, void *devid)
                  (stat & (STATUS_DATA_TRANS_DONE | STATUS_WRITE_OP_DONE)))
                mxcmci_data_done(host, stat);
 #endif
+       if (host->default_irq_mask &&
+                 (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL)))
+               mmc_detect_change(host->mmc, msecs_to_jiffies(200));
        return IRQ_HANDLED;
 }
 
@@ -809,6 +813,12 @@ static int mxcmci_probe(struct platform_device *pdev)
        else
                mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
 
+       if (host->pdata && host->pdata->dat3_card_detect)
+               host->default_irq_mask =
+                       INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN;
+       else
+               host->default_irq_mask = 0;
+
        host->res = r;
        host->irq = irq;
 
@@ -835,7 +845,7 @@ static int mxcmci_probe(struct platform_device *pdev)
        /* recommended in data sheet */
        writew(0x2db4, host->base + MMC_REG_READ_TO);
 
-       writel(0, host->base + MMC_REG_INT_CNTR);
+       writel(host->default_irq_mask, host->base + MMC_REG_INT_CNTR);
 
 #ifdef HAS_DMA
        host->dma = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_LOW);