NFC: Initial LLCP support
This patch is an initial implementation for the NFC Logical Link Control
protocol. It's also known as NFC peer to peer mode.
This is a basic implementation as it lacks SDP (services Discovery
Protocol), frames aggregation support, and frame rejecion parsing.
Follow up patches will implement those missing features.
This code has been tested against a Nexus S phone implementing LLCP 1.0.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/nfc/core.c b/net/nfc/core.c
index 3a45f21..3ddf6e6 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -240,6 +240,7 @@
rc = dev->ops->dep_link_down(dev);
if (!rc) {
dev->dep_link_up = false;
+ nfc_llcp_mac_is_down(dev);
nfc_genl_dep_link_down_event(dev);
}
@@ -254,6 +255,8 @@
dev->dep_link_up = true;
dev->dep_rf_mode = rf_mode;
+ nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode);
+
return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode);
}
EXPORT_SYMBOL(nfc_dep_link_is_up);
@@ -360,13 +363,13 @@
if (gb_len > NFC_MAX_GT_LEN)
return -EINVAL;
- return 0;
+ return nfc_llcp_set_remote_gb(dev, gb, gb_len);
}
EXPORT_SYMBOL(nfc_set_remote_general_bytes);
u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, u8 *gt_len)
{
- return NULL;
+ return nfc_llcp_general_bytes(dev, gt_len);
}
EXPORT_SYMBOL(nfc_get_local_general_bytes);
@@ -560,6 +563,10 @@
if (rc < 0)
return rc;
+ rc = nfc_llcp_register_device(dev);
+ if (rc)
+ pr_err("Could not register llcp device\n");
+
rc = nfc_genl_device_added(dev);
if (rc)
pr_debug("The userspace won't be notified that the device %s was added\n",
@@ -591,6 +598,8 @@
mutex_unlock(&nfc_devlist_mutex);
+ nfc_llcp_unregister_device(dev);
+
rc = nfc_genl_device_removed(dev);
if (rc)
pr_debug("The userspace won't be notified that the device %s was removed\n",
@@ -620,6 +629,10 @@
if (rc)
goto err_rawsock;
+ rc = nfc_llcp_init();
+ if (rc)
+ goto err_llcp_sock;
+
rc = af_nfc_init();
if (rc)
goto err_af_nfc;
@@ -627,6 +640,8 @@
return 0;
err_af_nfc:
+ nfc_llcp_exit();
+err_llcp_sock:
rawsock_exit();
err_rawsock:
nfc_genl_exit();
@@ -638,6 +653,7 @@
static void __exit nfc_exit(void)
{
af_nfc_exit();
+ nfc_llcp_exit();
rawsock_exit();
nfc_genl_exit();
class_unregister(&nfc_class);