mmc: sdhci: Implement SDHCI card detect

Card detect function implemented for SDHCI framework.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 4ffe74e35e08872f40ae2bbdcb2224ca47546abe..c4e88790bc68e713c834871164ffa3a53114dc4f 100644 (file)
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -12,6 +12,7 @@
 #include <malloc.h>
 #include <mmc.h>
 #include <sdhci.h>
+#include <dm.h>
 
 #if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
 void *aligned_buffer = (void *)CONFIG_FIXED_SDHCI_ALIGNED_BUFFER;
@@ -630,9 +631,40 @@ int sdhci_probe(struct udevice *dev)
        return sdhci_init(mmc);
 }
 
+int sdhci_get_cd(struct udevice *dev)
+{
+       struct mmc *mmc = mmc_get_mmc_dev(dev);
+       struct sdhci_host *host = mmc->priv;
+       int value;
+
+       /* If nonremovable, assume that the card is always present. */
+       if (mmc->cfg->host_caps & MMC_CAP_NONREMOVABLE)
+               return 1;
+       /* If polling, assume that the card is always present. */
+       if (mmc->cfg->host_caps & MMC_CAP_NEEDS_POLL)
+               return 1;
+
+#if CONFIG_IS_ENABLED(DM_GPIO)
+       value = dm_gpio_get_value(&host->cd_gpio);
+       if (value >= 0) {
+               if (mmc->cfg->host_caps & MMC_CAP_CD_ACTIVE_HIGH)
+                       return !value;
+               else
+                       return value;
+       }
+#endif
+       value = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) &
+                  SDHCI_CARD_PRESENT);
+       if (mmc->cfg->host_caps & MMC_CAP_CD_ACTIVE_HIGH)
+               return !value;
+       else
+               return value;
+}
+
 const struct dm_mmc_ops sdhci_ops = {
        .send_cmd       = sdhci_send_command,
        .set_ios        = sdhci_set_ios,
+       .get_cd         = sdhci_get_cd,
 #ifdef MMC_SUPPORTS_TUNING
        .execute_tuning = sdhci_execute_tuning,
 #endif