1 files changed, 166 insertions, 0 deletions
diff --git a/kernel/net/nfc/hci/llc.c b/kernel/net/nfc/hci/llc.c
new file mode 100644
index 000000000..1b90c0531
--- /dev/null
+++ b/kernel/net/nfc/hci/llc.c
@@ -0,0 +1,166 @@
+/*
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <net/nfc/llc.h>
+
+#include "llc.h"
+
+static LIST_HEAD(llc_engines);
+
+int nfc_llc_init(void)
+{
+	int r;
+
+	r = nfc_llc_nop_register();
+	if (r)
+		goto exit;
+
+	r = nfc_llc_shdlc_register();
+	if (r)
+		goto exit;
+
+	return 0;
+
+exit:
+	nfc_llc_exit();
+	return r;
+}
+
+void nfc_llc_exit(void)
+{
+	struct nfc_llc_engine *llc_engine, *n;
+
+	list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) {
+		list_del(&llc_engine->entry);
+		kfree(llc_engine->name);
+		kfree(llc_engine);
+	}
+}
+
+int nfc_llc_register(const char *name, struct nfc_llc_ops *ops)
+{
+	struct nfc_llc_engine *llc_engine;
+
+	llc_engine = kzalloc(sizeof(struct nfc_llc_engine), GFP_KERNEL);
+	if (llc_engine == NULL)
+		return -ENOMEM;
+
+	llc_engine->name = kstrdup(name, GFP_KERNEL);
+	if (llc_engine->name == NULL) {
+		kfree(llc_engine);
+		return -ENOMEM;
+	}
+	llc_engine->ops = ops;
+
+	INIT_LIST_HEAD(&llc_engine->entry);
+	list_add_tail(&llc_engine->entry, &llc_engines);
+
+	return 0;
+}
+
+static struct nfc_llc_engine *nfc_llc_name_to_engine(const char *name)
+{
+	struct nfc_llc_engine *llc_engine;
+
+	list_for_each_entry(llc_engine, &llc_engines, entry) {
+		if (strcmp(llc_engine->name, name) == 0)
+			return llc_engine;
+	}
+
+	return NULL;
+}
+
+void nfc_llc_unregister(const char *name)
+{
+	struct nfc_llc_engine *llc_engine;
+
+	llc_engine = nfc_llc_name_to_engine(name);
+	if (llc_engine == NULL)
+		return;
+
+	list_del(&llc_engine->entry);
+	kfree(llc_engine->name);
+	kfree(llc_engine);
+}
+
+struct nfc_llc *nfc_llc_allocate(const char *name, 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, llc_failure_t llc_failure)
+{
+	struct nfc_llc_engine *llc_engine;
+	struct nfc_llc *llc;
+
+	llc_engine = nfc_llc_name_to_engine(name);
+	if (llc_engine == NULL)
+		return NULL;
+
+	llc = kzalloc(sizeof(struct nfc_llc), GFP_KERNEL);
+	if (llc == NULL)
+		return NULL;
+
+	llc->data = llc_engine->ops->init(hdev, xmit_to_drv, rcv_to_hci,
+					  tx_headroom, tx_tailroom,
+					  &llc->rx_headroom, &llc->rx_tailroom,
+					  llc_failure);
+	if (llc->data == NULL) {
+		kfree(llc);
+		return NULL;
+	}
+	llc->ops = llc_engine->ops;
+
+	return llc;
+}
+
+void nfc_llc_free(struct nfc_llc *llc)
+{
+	llc->ops->deinit(llc);
+	kfree(llc);
+}
+
+inline void nfc_llc_get_rx_head_tail_room(struct nfc_llc *llc, int *rx_headroom,
+					  int *rx_tailroom)
+{
+	*rx_headroom = llc->rx_headroom;
+	*rx_tailroom = llc->rx_tailroom;
+}
+
+inline int nfc_llc_start(struct nfc_llc *llc)
+{
+	return llc->ops->start(llc);
+}
+
+inline int nfc_llc_stop(struct nfc_llc *llc)
+{
+	return llc->ops->stop(llc);
+}
+
+inline void nfc_llc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
+{
+	llc->ops->rcv_from_drv(llc, skb);
+}
+
+inline int nfc_llc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
+{
+	return llc->ops->xmit_from_hci(llc, skb);
+}
+
+inline void *nfc_llc_get_data(struct nfc_llc *llc)
+{
+	return llc->data;
+}