4 files changed, 74 insertions, 0 deletions

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index fd95b18e988b..0d9b2d6f9ebf 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -252,6 +252,10 @@ int mmc_add_card(struct mmc_card *card)
         if (ret)
                 return ret;
 
+#ifdef CONFIG_DEBUG_FS
+        mmc_add_card_debugfs(card);
+#endif
+
         mmc_card_set_present(card);
 
         return 0;
@@ -263,6 +267,10 @@ int mmc_add_card(struct mmc_card *card)
  */
 void mmc_remove_card(struct mmc_card *card)
 {
+#ifdef CONFIG_DEBUG_FS
+        mmc_remove_card_debugfs(card);
+#endif
+
         if (mmc_card_present(card)) {
                 if (mmc_host_is_spi(card->host)) {
                         printk(KERN_INFO "%s: SPI card removed\n",
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 745da9881aa7..c819effa1032 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -56,5 +56,8 @@ extern int use_spi_crc;
 void mmc_add_host_debugfs(struct mmc_host *host);
 void mmc_remove_host_debugfs(struct mmc_host *host);
 
+void mmc_add_card_debugfs(struct mmc_card *card);
+void mmc_remove_card_debugfs(struct mmc_card *card);
+
 #endif
 
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index 133c6e51f26b..1237bb4c722b 100644
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -12,9 +12,11 @@
 #include <linux/seq_file.h>
 #include <linux/stat.h>
 
+#include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
 
 #include "core.h"
+#include "mmc_ops.h"
 
 /* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */
 static int mmc_ios_show(struct seq_file *s, void *data)
@@ -162,3 +164,62 @@ void mmc_remove_host_debugfs(struct mmc_host *host)
 {
         debugfs_remove_recursive(host->debugfs_root);
 }
+
+static int mmc_dbg_card_status_get(void *data, u64 *val)
+{
+        struct mmc_card *card = data;
+        u32             status;
+        int             ret;
+
+        mmc_claim_host(card->host);
+
+        ret = mmc_send_status(data, &status);
+        if (!ret)
+                *val = status;
+
+        mmc_release_host(card->host);
+
+        return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
+                NULL, "%08llx\n");
+
+void mmc_add_card_debugfs(struct mmc_card *card)
+{
+        struct mmc_host *host = card->host;
+        struct dentry   *root;
+
+        if (!host->debugfs_root)
+                return;
+
+        root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root);
+        if (IS_ERR(root))
+                /* Don't complain -- debugfs just isn't enabled */
+                return;
+        if (!root)
+                /* Complain -- debugfs is enabled, but it failed to
+                 * create the directory. */
+                goto err;
+
+        card->debugfs_root = root;
+
+        if (!debugfs_create_x32("state", S_IRUSR, root, &card->state))
+                goto err;
+
+        if (mmc_card_mmc(card) || mmc_card_sd(card))
+                if (!debugfs_create_file("status", S_IRUSR, root, card,
+                                        &mmc_dbg_card_status_fops))
+                        goto err;
+
+        return;
+
+err:
+        debugfs_remove_recursive(root);
+        card->debugfs_root = NULL;
+        dev_err(&card->dev, "failed to initialize debugfs\n");
+}
+
+void mmc_remove_card_debugfs(struct mmc_card *card)
+{
+        debugfs_remove_recursive(card->debugfs_root);
+}
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 0d508ac17d64..ee6e822d5994 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -111,6 +111,8 @@ struct mmc_card {
         unsigned                num_info;       /* number of info strings */
         const char              **info;         /* info strings */
         struct sdio_func_tuple  *tuples;        /* unknown common tuples */
+
+        struct dentry           *debugfs_root;
 };
 
 #define mmc_card_mmc(c)         ((c)->type == MMC_TYPE_MMC)