NFC: Initial Secure Element API

Each NFC adapter can have several links to different secure elements and
that property needs to be exported by the drivers.
A secure element link can be enabled and disabled, and card emulation will
be handled by the currently active one. Otherwise card emulation will be
host implemented.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

4 files changed, 24 insertions, 0 deletions

diff --git a/include/net/nfc/hci.h b/include/net/nfc/hci.h
index 2ff71750c428..b87a1692b086 100644
--- a/include/net/nfc/hci.h
+++ b/include/net/nfc/hci.h
@@ -59,6 +59,8 @@ struct nfc_hci_ops {
                               struct nfc_target *target);
         int (*event_received)(struct nfc_hci_dev *hdev, u8 gate, u8 event,
                               struct sk_buff *skb);
+        int (*enable_se)(struct nfc_dev *dev, u32 secure_element);
+        int (*disable_se)(struct nfc_dev *dev, u32 secure_element);
 };
 
 /* Pipes */
@@ -150,6 +152,7 @@ struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
                                             struct nfc_hci_init_data *init_data,
                                             unsigned long quirks,
                                             u32 protocols,
+                                            u32 supported_se,
                                             const char *llc_name,
                                             int tx_headroom,
                                             int tx_tailroom,
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
index d705d8674949..5bc0c460edc0 100644
--- a/include/net/nfc/nci_core.h
+++ b/include/net/nfc/nci_core.h
@@ -147,6 +147,7 @@ struct nci_dev {
 /* ----- NCI Devices ----- */
 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
                                     __u32 supported_protocols,
+                                    __u32 supported_se,
                                     int tx_headroom,
                                     int tx_tailroom);
 void nci_free_device(struct nci_dev *ndev);
diff --git a/include/net/nfc/nfc.h b/include/net/nfc/nfc.h
index 1665674e86b2..87a6417fc934 100644
--- a/include/net/nfc/nfc.h
+++ b/include/net/nfc/nfc.h
@@ -68,6 +68,8 @@ struct nfc_ops {
                              void *cb_context);
         int (*tm_send)(struct nfc_dev *dev, struct sk_buff *skb);
         int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target);
+        int (*enable_se)(struct nfc_dev *dev, u32 secure_element);
+        int (*disable_se)(struct nfc_dev *dev, u32 secure_element);
 };
 
 #define NFC_TARGET_IDX_ANY -1
@@ -109,6 +111,9 @@ struct nfc_dev {
         struct nfc_genl_data genl_data;
         u32 supported_protocols;
 
+        u32 supported_se;
+        u32 active_se;
+
         int tx_headroom;
         int tx_tailroom;
 
@@ -125,6 +130,7 @@ extern struct class nfc_class;
 
 struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
                                     u32 supported_protocols,
+                                    u32 supported_se,
                                     int tx_headroom,
                                     int tx_tailroom);
 
diff --git a/include/uapi/linux/nfc.h b/include/uapi/linux/nfc.h
index 0e63cee8d810..80e4ecd8c04c 100644
--- a/include/uapi/linux/nfc.h
+++ b/include/uapi/linux/nfc.h
@@ -67,6 +67,11 @@
  *      subsequent CONNECT and CC messages.
  *      If one of the passed parameters is wrong none is set and -EINVAL is
  *      returned.
+ * @NFC_CMD_ENABLE_SE: Enable the physical link to a specific secure element.
+ *      Once enabled a secure element will handle card emulation mode, i.e.
+ *      starting a poll from a device which has a secure element enabled means
+ *      we want to do SE based card emulation.
+ * @NFC_CMD_DISABLE_SE: Disable the physical link to a specific secure element.
  */
 enum nfc_commands {
         NFC_CMD_UNSPEC,
@@ -86,6 +91,8 @@ enum nfc_commands {
         NFC_EVENT_TM_DEACTIVATED,
         NFC_CMD_LLC_GET_PARAMS,
         NFC_CMD_LLC_SET_PARAMS,
+        NFC_CMD_ENABLE_SE,
+        NFC_CMD_DISABLE_SE,
 /* private: internal use only */
         __NFC_CMD_AFTER_LAST
 };
@@ -114,6 +121,7 @@ enum nfc_commands {
  * @NFC_ATTR_LLC_PARAM_LTO: Link TimeOut parameter
  * @NFC_ATTR_LLC_PARAM_RW: Receive Window size parameter
  * @NFC_ATTR_LLC_PARAM_MIUX: MIU eXtension parameter
+ * @NFC_ATTR_SE: Available Secure Elements
  */
 enum nfc_attrs {
         NFC_ATTR_UNSPEC,
@@ -134,6 +142,7 @@ enum nfc_attrs {
         NFC_ATTR_LLC_PARAM_LTO,
         NFC_ATTR_LLC_PARAM_RW,
         NFC_ATTR_LLC_PARAM_MIUX,
+        NFC_ATTR_SE,
 /* private: internal use only */
         __NFC_ATTR_AFTER_LAST
 };
@@ -172,6 +181,11 @@ enum nfc_attrs {
 #define NFC_PROTO_NFC_DEP_MASK    (1 << NFC_PROTO_NFC_DEP)
 #define NFC_PROTO_ISO14443_B_MASK (1 << NFC_PROTO_ISO14443_B)
 
+/* NFC Secure Elements */
+#define NFC_SE_NONE     0x0
+#define NFC_SE_UICC     0x1
+#define NFC_SE_EMBEDDED 0x2
+
 struct sockaddr_nfc {
         sa_family_t sa_family;
         __u32 dev_idx;