NFC: Add an LLC Core layer to HCI

The LLC layer manages modules that control the link layer protocol (such
as shdlc) between HCI and an HCI driver. The driver must simply specify
the required llc when it registers with HCI.

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

1 files changed, 58 insertions, 0 deletions

diff --git a/net/nfc/hci/llc.h b/net/nfc/hci/llc.h
new file mode 100644
index 0000000..b2c7285
--- /dev/null
+++ b/net/nfc/hci/llc.h
@@ -0,0 +1,58 @@
+/*
+ * Link Layer Control manager
+ *
+ * Copyright (C) 2012  Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __LOCAL_LLC_H_
+#define __LOCAL_LLC_H_
+
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+#include <linux/skbuff.h>
+
+struct nfc_llc_ops {
+	void *(*init) (struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+		       rcv_to_hci_t rcv_to_hci, int tx_headroom,
+		       int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+		       llc_failure_t llc_failure);
+	void (*deinit) (struct nfc_llc *llc);
+	int (*start) (struct nfc_llc *llc);
+	int (*stop) (struct nfc_llc *llc);
+	void (*rcv_from_drv) (struct nfc_llc *llc, struct sk_buff *skb);
+	int (*xmit_from_hci) (struct nfc_llc *llc, struct sk_buff *skb);
+};
+
+struct nfc_llc_engine {
+	const char *name;
+	struct nfc_llc_ops *ops;
+	struct list_head entry;
+};
+
+struct nfc_llc {
+	void *data;
+	struct nfc_llc_ops *ops;
+	int rx_headroom;
+	int rx_tailroom;
+};
+
+void *nfc_llc_get_data(struct nfc_llc *llc);
+
+int nfc_llc_register(const char *name, struct nfc_llc_ops *ops);
+void nfc_llc_unregister(const char *name);
+
+#endif /* __LOCAL_LLC_H_ */