NFC: Implement HCI DEP link up and down

And implement the corresponding hooks for pn544.

Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/nfc/pn544_hci.c b/drivers/nfc/pn544_hci.c
index 6d564bd8b3b4..4ed2b8356017 100644
--- a/drivers/nfc/pn544_hci.c
+++ b/drivers/nfc/pn544_hci.c
@@ -746,6 +746,43 @@ static int pn544_hci_start_poll(struct nfc_hci_dev *hdev,
         return r;
 }
 
+static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev,
+                                struct nfc_target *target, u8 comm_mode,
+                                u8 *gb, size_t gb_len)
+{
+        struct sk_buff *rgb_skb = NULL;
+        int r;
+
+        r = nfc_hci_get_param(hdev, target->hci_reader_gate,
+                                PN544_DEP_ATR_RES, &rgb_skb);
+        if (r < 0)
+                return r;
+
+        if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) {
+                r = -EPROTO;
+                goto exit;
+        }
+        print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET,
+                        16, 1, rgb_skb->data, rgb_skb->len, true);
+
+        r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data,
+                                                rgb_skb->len);
+
+        if (r == 0)
+                r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode,
+                                        NFC_RF_INITIATOR);
+exit:
+        kfree_skb(rgb_skb);
+        return r;
+}
+
+static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev)
+{
+
+        return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+                                        NFC_HCI_EVT_END_OPERATION, NULL, 0);
+}
+
 static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
                                       struct nfc_target *target)
 {
@@ -973,6 +1010,8 @@ static struct nfc_hci_ops pn544_hci_ops = {
         .hci_ready = pn544_hci_ready,
         .xmit = pn544_hci_xmit,
         .start_poll = pn544_hci_start_poll,
+        .dep_link_up = pn544_hci_dep_link_up,
+        .dep_link_down = pn544_hci_dep_link_down,
         .target_from_gate = pn544_hci_target_from_gate,
         .complete_target_discovered = pn544_hci_complete_target_discovered,
         .data_exchange = pn544_hci_data_exchange,