mmc: pxamci: add SDIO card interrupt reporting capability

Again, only available from PXA27x.

Signed-off-by: Bridge Wu <mingqiao.wu@gmail.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

2 files changed, 24 insertions, 5 deletions

diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index 6549f546df55..91e25683b397 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -309,6 +309,10 @@ static irqreturn_t pxamci_irq(int irq, void *devid)
                         handled |= pxamci_cmd_done(host, stat);
                 if (ireg & DATA_TRAN_DONE)
                         handled |= pxamci_data_done(host, stat);
+                if (ireg & SDIO_INT) {
+                        mmc_signal_sdio_irq(host->mmc);
+                        handled = 1;
+                }
         }
 
         return IRQ_RETVAL(handled);
@@ -391,10 +395,21 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                  host->clkrt, host->cmdat);
 }
 
+static void pxamci_enable_sdio_irq(struct mmc_host *host, int enable)
+{
+        struct pxamci_host *pxa_host = mmc_priv(host);
+
+        if (enable)
+                pxamci_enable_irq(pxa_host, SDIO_INT);
+        else
+                pxamci_disable_irq(pxa_host, SDIO_INT);
+}
+
 static const struct mmc_host_ops pxamci_ops = {
-        .request        = pxamci_request,
-        .get_ro         = pxamci_get_ro,
-        .set_ios        = pxamci_set_ios,
+        .request                = pxamci_request,
+        .get_ro                 = pxamci_get_ro,
+        .set_ios                = pxamci_set_ios,
+        .enable_sdio_irq        = pxamci_enable_sdio_irq,
 };
 
 static void pxamci_dma_irq(int dma, void *devid)
@@ -466,8 +481,11 @@ static int pxamci_probe(struct platform_device *pdev)
                          host->pdata->ocr_mask :
                          MMC_VDD_32_33|MMC_VDD_33_34;
         mmc->caps = 0;
-        if (!cpu_is_pxa21x() && !cpu_is_pxa25x())
-                mmc->caps |= MMC_CAP_4_BIT_DATA;
+        host->cmdat = 0;
+        if (!cpu_is_pxa21x() && !cpu_is_pxa25x()) {
+                mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
+                host->cmdat |= CMDAT_SDIO_INT_EN;
+        }
 
         host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL);
         if (!host->sg_cpu) {
diff --git a/drivers/mmc/host/pxamci.h b/drivers/mmc/host/pxamci.h
index 5655be823a00..3153e779d46a 100644
--- a/drivers/mmc/host/pxamci.h
+++ b/drivers/mmc/host/pxamci.h
@@ -25,6 +25,7 @@
 #define SPI_EN                  (1 << 0)
 
 #define MMC_CMDAT       0x0010
+#define CMDAT_SDIO_INT_EN       (1 << 11)
 #define CMDAT_SD_4DAT           (1 << 8)
 #define CMDAT_DMAEN             (1 << 7)
 #define CMDAT_INIT              (1 << 6)