mmc: at91_mci: add sdio irq management

Enable SDIO interrupt handling.

Signed-off-by: Eric Benard <ebenard@free.fr>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 22 insertions, 4 deletions

diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index b2bb79e74eaa..9b546a97aa44 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -665,7 +665,7 @@ static void at91_mci_completed_command(struct at91mci_host *host)
         struct mmc_command *cmd = host->cmd;
         unsigned int status;
 
-        at91_mci_write(host, AT91_MCI_IDR, 0xffffffff);
+        at91_mci_write(host, AT91_MCI_IDR, 0xffffffff & ~(AT91_MCI_SDIOIRQA | AT91_MCI_SDIOIRQB));
 
         cmd->resp[0] = at91_mci_read(host, AT91_MCI_RSPR(0));
         cmd->resp[1] = at91_mci_read(host, AT91_MCI_RSPR(1));
@@ -856,6 +856,12 @@ static irqreturn_t at91_mci_irq(int irq, void *devid)
                         }
                 }
 
+                if (int_status & AT91_MCI_SDIOIRQA)
+                        mmc_signal_sdio_irq(host->mmc);
+
+                if (int_status & AT91_MCI_SDIOIRQB)
+                        mmc_signal_sdio_irq(host->mmc);
+
                 if (int_status & AT91_MCI_TXRDY)
                         pr_debug("Ready to transmit\n");
 
@@ -870,10 +876,10 @@ static irqreturn_t at91_mci_irq(int irq, void *devid)
 
         if (completed) {
                 pr_debug("Completed command\n");
-                at91_mci_write(host, AT91_MCI_IDR, 0xffffffff);
+                at91_mci_write(host, AT91_MCI_IDR, 0xffffffff & ~(AT91_MCI_SDIOIRQA | AT91_MCI_SDIOIRQB));
                 at91_mci_completed_command(host);
         } else
-                at91_mci_write(host, AT91_MCI_IDR, int_status);
+                at91_mci_write(host, AT91_MCI_IDR, int_status & ~(AT91_MCI_SDIOIRQA | AT91_MCI_SDIOIRQB));
 
         return IRQ_HANDLED;
 }
@@ -913,10 +919,22 @@ static int at91_mci_get_ro(struct mmc_host *mmc)
         return -ENOSYS;
 }
 
+static void at91_mci_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+        struct at91mci_host *host = mmc_priv(mmc);
+
+        pr_debug("%s: sdio_irq %c : %s\n", mmc_hostname(host->mmc),
+                host->board->slot_b ? 'B':'A', enable ? "enable" : "disable");
+        at91_mci_write(host, enable ? AT91_MCI_IER : AT91_MCI_IDR,
+                host->board->slot_b ? AT91_MCI_SDIOIRQB : AT91_MCI_SDIOIRQA);
+
+}
+
 static const struct mmc_host_ops at91_mci_ops = {
         .request        = at91_mci_request,
         .set_ios        = at91_mci_set_ios,
         .get_ro         = at91_mci_get_ro,
+        .enable_sdio_irq = at91_mci_enable_sdio_irq,
 };
 
 /*
@@ -947,7 +965,7 @@ static int __init at91_mci_probe(struct platform_device *pdev)
         mmc->f_min = 375000;
         mmc->f_max = 25000000;
         mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-        mmc->caps = MMC_CAP_MULTIWRITE;
+        mmc->caps = MMC_CAP_MULTIWRITE | MMC_CAP_SDIO_IRQ;
 
         mmc->max_blk_size = 4095;
         mmc->max_blk_count = mmc->max_req_size;