NFC: Add se_io NFC operand

se_io allows to send apdu over the CLF to the embedded
Secure Element.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 46 insertions, 1 deletions

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 95818314aea6..44989fc8cddf 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1310,6 +1310,51 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
         return 0;
 }
 
+static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
+                     u8 *apdu, size_t apdu_length,
+                     se_io_cb_t cb, void *cb_context)
+{
+        struct nfc_se *se;
+        int rc;
+
+        pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
+
+        device_lock(&dev->dev);
+
+        if (!device_is_registered(&dev->dev)) {
+                rc = -ENODEV;
+                goto error;
+        }
+
+        if (!dev->dev_up) {
+                rc = -ENODEV;
+                goto error;
+        }
+
+        if (!dev->ops->se_io) {
+                rc = -EOPNOTSUPP;
+                goto error;
+        }
+
+        se = nfc_find_se(dev, se_idx);
+        if (!se) {
+                rc = -EINVAL;
+                goto error;
+        }
+
+        if (se->state != NFC_SE_ENABLED) {
+                rc = -ENODEV;
+                goto error;
+        }
+
+        rc = dev->ops->se_io(dev, se_idx, apdu,
+                        apdu_length, cb, cb_context);
+
+error:
+        device_unlock(&dev->dev);
+        return rc;
+}
+
 struct se_io_ctx {
         u32 dev_idx;
         u32 se_idx;
@@ -1392,7 +1437,7 @@ static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
         ctx->dev_idx = dev_idx;
         ctx->se_idx = se_idx;
 
-        return dev->ops->se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
+        return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
 }
 
 static const struct genl_ops nfc_genl_ops[] = {