NFC: add nfc generic netlink interface

The NFC generic netlink interface exports the NFC control operations
to the user space.

Signed-off-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 133 insertions, 0 deletions

diff --git a/include/linux/nfc.h b/include/linux/nfc.h
new file mode 100644
index 000000000000..1170476d270a
--- /dev/null
+++ b/include/linux/nfc.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ *
+ * Authors:
+ *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
+ *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 __LINUX_NFC_H
+#define __LINUX_NFC_H
+
+#define NFC_GENL_NAME "nfc"
+#define NFC_GENL_VERSION 1
+
+#define NFC_GENL_MCAST_EVENT_NAME "events"
+
+/**
+ * enum nfc_commands - supported nfc commands
+ *
+ * @NFC_CMD_UNSPEC: unspecified command
+ *
+ * @NFC_CMD_GET_DEVICE: request information about a device (requires
+ *      %NFC_ATTR_DEVICE_INDEX) or dump request to get a list of all nfc devices
+ * @NFC_CMD_START_POLL: start polling for targets using the given protocols
+ *      (requires %NFC_ATTR_DEVICE_INDEX and %NFC_ATTR_PROTOCOLS)
+ * @NFC_CMD_STOP_POLL: stop polling for targets (requires
+ *      %NFC_ATTR_DEVICE_INDEX)
+ * @NFC_CMD_GET_TARGET: dump all targets found by the previous poll (requires
+ *      %NFC_ATTR_DEVICE_INDEX)
+ * @NFC_EVENT_TARGETS_FOUND: event emitted when a new target is found
+ *      (it sends %NFC_ATTR_DEVICE_INDEX)
+ * @NFC_EVENT_DEVICE_ADDED: event emitted when a new device is registred
+ *      (it sends %NFC_ATTR_DEVICE_NAME, %NFC_ATTR_DEVICE_INDEX and
+ *      %NFC_ATTR_PROTOCOLS)
+ * @NFC_EVENT_DEVICE_REMOVED: event emitted when a device is removed
+ *      (it sends %NFC_ATTR_DEVICE_INDEX)
+ */
+enum nfc_commands {
+        NFC_CMD_UNSPEC,
+        NFC_CMD_GET_DEVICE,
+        NFC_CMD_START_POLL,
+        NFC_CMD_STOP_POLL,
+        NFC_CMD_GET_TARGET,
+        NFC_EVENT_TARGETS_FOUND,
+        NFC_EVENT_DEVICE_ADDED,
+        NFC_EVENT_DEVICE_REMOVED,
+/* private: internal use only */
+        __NFC_CMD_AFTER_LAST
+};
+#define NFC_CMD_MAX (__NFC_CMD_AFTER_LAST - 1)
+
+/**
+ * enum nfc_attrs - supported nfc attributes
+ *
+ * @NFC_ATTR_UNSPEC: unspecified attribute
+ *
+ * @NFC_ATTR_DEVICE_INDEX: index of nfc device
+ * @NFC_ATTR_DEVICE_NAME: device name, max 8 chars
+ * @NFC_ATTR_PROTOCOLS: nfc protocols - bitwise or-ed combination from
+ *      NFC_PROTO_*_MASK constants
+ * @NFC_ATTR_TARGET_INDEX: index of the nfc target
+ * @NFC_ATTR_TARGET_SENS_RES: NFC-A targets extra information such as NFCID
+ * @NFC_ATTR_TARGET_SEL_RES: NFC-A targets extra information (useful if the
+ *      target is not NFC-Forum compliant)
+ */
+enum nfc_attrs {
+        NFC_ATTR_UNSPEC,
+        NFC_ATTR_DEVICE_INDEX,
+        NFC_ATTR_DEVICE_NAME,
+        NFC_ATTR_PROTOCOLS,
+        NFC_ATTR_TARGET_INDEX,
+        NFC_ATTR_TARGET_SENS_RES,
+        NFC_ATTR_TARGET_SEL_RES,
+/* private: internal use only */
+        __NFC_ATTR_AFTER_LAST
+};
+#define NFC_ATTR_MAX (__NFC_ATTR_AFTER_LAST - 1)
+
+#define NFC_DEVICE_NAME_MAXSIZE 8
+
+/* NFC protocols */
+#define NFC_PROTO_JEWEL         1
+#define NFC_PROTO_MIFARE        2
+#define NFC_PROTO_FELICA        3
+#define NFC_PROTO_ISO14443      4
+#define NFC_PROTO_NFC_DEP       5
+
+#define NFC_PROTO_MAX           6
+
+/* NFC protocols masks used in bitsets */
+#define NFC_PROTO_JEWEL_MASK    (1 << NFC_PROTO_JEWEL)
+#define NFC_PROTO_MIFARE_MASK   (1 << NFC_PROTO_MIFARE)
+#define NFC_PROTO_FELICA_MASK   (1 << NFC_PROTO_FELICA)
+#define NFC_PROTO_ISO14443_MASK (1 << NFC_PROTO_ISO14443)
+#define NFC_PROTO_NFC_DEP_MASK  (1 << NFC_PROTO_NFC_DEP)
+
+#endif /*__LINUX_NFC_H */
diff --git a/include/net/nfc.h b/include/net/nfc.h
index c57b579c8301..cc0130312f70 100644
--- a/include/net/nfc.h
+++ b/include/net/nfc.h
@@ -58,10 +58,28 @@ struct nfc_ops {
                                                         void *cb_context);
 };
 
+struct nfc_target {
+        u32 idx;
+        u32 supported_protocols;
+        u16 sens_res;
+        u8 sel_res;
+};
+
+struct nfc_genl_data {
+        u32 poll_req_pid;
+        struct mutex genl_data_mutex;
+};
+
 struct nfc_dev {
         unsigned idx;
+        unsigned target_idx;
+        struct nfc_target *targets;
+        int n_targets;
+        int targets_generation;
+        spinlock_t targets_lock;
         struct device dev;
         bool polling;
+        struct nfc_genl_data genl_data;
         u32 supported_protocols;
 
         struct nfc_ops *ops;
@@ -132,4 +150,7 @@ static inline const char *nfc_device_name(struct nfc_dev *dev)
 
 struct sk_buff *nfc_alloc_skb(unsigned int size, gfp_t gfp);
 
+int nfc_targets_found(struct nfc_dev *dev, struct nfc_target *targets,
+                                                        int ntargets);
+
 #endif /* __NET_NFC_H */