NFC: Add a public nfc_hci_send_cmd_async method

This method initiates execution of an HCI cmd. Result will be delivered
through an asynchronous callback.

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 33 insertions, 1 deletions

diff --git a/net/nfc/hci/command.c b/net/nfc/hci/command.c
index 15e21093c7a5..71c6a7086b8f 100644
--- a/net/nfc/hci/command.c
+++ b/net/nfc/hci/command.c
@@ -28,6 +28,20 @@
 
 #include "hci.h"
 
+static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
+                               const u8 *param, size_t param_len,
+                               data_exchange_cb_t cb, void *cb_context)
+{
+        pr_debug("exec cmd async through pipe=%d, cmd=%d, plen=%zd\n", pipe,
+                 cmd, param_len);
+
+        /* TODO: Define hci cmd execution delay. Should it be the same
+         * for all commands?
+         */
+        return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_COMMAND, cmd,
+                                      param, param_len, cb, cb_context, 3000);
+}
+
 /*
  * HCI command execution completion callback.
  * err will be a standard linux error (may be converted from HCI response)
@@ -60,7 +74,8 @@ static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
         hcp_ew.exec_complete = false;
         hcp_ew.result_skb = NULL;
 
-        pr_debug("through pipe=%d, cmd=%d, plen=%zd\n", pipe, cmd, param_len);
+        pr_debug("exec cmd sync through pipe=%d, cmd=%d, plen=%zd\n", pipe,
+                 cmd, param_len);
 
         /* TODO: Define hci cmd execution delay. Should it be the same
          * for all commands?
@@ -138,6 +153,23 @@ int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
 }
 EXPORT_SYMBOL(nfc_hci_send_cmd);
 
+int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
+                           const u8 *param, size_t param_len,
+                           data_exchange_cb_t cb, void *cb_context)
+{
+        u8 pipe;
+
+        pr_debug("\n");
+
+        pipe = hdev->gate2pipe[gate];
+        if (pipe == NFC_HCI_INVALID_PIPE)
+                return -EADDRNOTAVAIL;
+
+        return nfc_hci_execute_cmd_async(hdev, pipe, cmd, param, param_len,
+                                         cb, cb_context);
+}
+EXPORT_SYMBOL(nfc_hci_send_cmd_async);
+
 int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
                       const u8 *param, size_t param_len)
 {