From: Christophe Ricard <christophe.ricard@gmail.com>
Date: Sun, 1 Feb 2015 21:26:10 +0000 (+0100)
Subject: NFC: nci: Add NFCEE discover support
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=af9c8aa67d07adcd3b41fb2934af7af056eabecf;p=linux.git
NFC: nci: Add NFCEE discover support
NFCEEs (NFC Execution Environment) have to be explicitly
discovered by sending the NCI_OP_NFCEE_DISCOVER_CMD
command. The NFCC will respond to this command by telling
us how many NFCEEs are connected to it. Then the NFCC sends
a notification command for each and every NFCEE connected.
Here we implement support for sending
NCI_OP_NFCEE_DISCOVER_CMD command, receiving the response
and the potential notifications.
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
index 5e508741f208b..31ad795aa4b51 100644
--- a/include/net/nfc/nci_core.h
+++ b/include/net/nfc/nci_core.h
@@ -100,6 +100,8 @@ struct nci_conn_info {
struct sk_buff *rx_skb;
};
+#define NCI_INVALID_CONN_ID 0x80
+
/* NCI Core structures */
struct nci_dev {
struct nfc_dev *nfc_dev;
@@ -182,6 +184,8 @@ void nci_unregister_device(struct nci_dev *ndev);
int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val);
+int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
+
static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
unsigned int len,
gfp_t how)
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index eb607970bd569..a258575485248 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -469,6 +469,23 @@ int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val)
}
EXPORT_SYMBOL(nci_set_config);
+static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt)
+{
+ struct nci_nfcee_discover_cmd cmd;
+ __u8 action = opt;
+
+ cmd.discovery_action = action;
+
+ nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
+}
+
+int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
+{
+ return nci_request(ndev, nci_nfcee_discover_req, action,
+ msecs_to_jiffies(NCI_CMD_TIMEOUT));
+}
+EXPORT_SYMBOL(nci_nfcee_discover);
+
static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
{
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index 28fdbe234bd41..4c0be7e82d29d 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -713,6 +713,33 @@ static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
nci_req_complete(ndev, NCI_STATUS_OK);
}
+static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev,
+ struct sk_buff *skb)
+{
+ u8 status = NCI_STATUS_OK;
+ struct nci_conn_info *conn_info;
+ struct nci_nfcee_discover_ntf *nfcee_ntf =
+ (struct nci_nfcee_discover_ntf *)skb->data;
+
+ pr_debug("\n");
+
+ conn_info = devm_kzalloc(&ndev->nfc_dev->dev,
+ sizeof(struct nci_conn_info), GFP_KERNEL);
+ if (!conn_info) {
+ status = NCI_STATUS_REJECTED;
+ goto exit;
+ }
+
+ conn_info->id = nfcee_ntf->nfcee_id;
+ conn_info->conn_id = NCI_INVALID_CONN_ID;
+
+ INIT_LIST_HEAD(&conn_info->list);
+ list_add(&conn_info->list, &ndev->conn_info_list);
+
+exit:
+ nci_req_complete(ndev, status);
+}
+
void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
__u16 ntf_opcode = nci_opcode(skb->data);
@@ -751,6 +778,9 @@ void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
nci_rf_deactivate_ntf_packet(ndev, skb);
break;
+ case NCI_OP_NFCEE_DISCOVER_NTF:
+ nci_nfcee_discover_ntf_packet(ndev, skb);
+ break;
default:
pr_err("unknown ntf opcode 0x%x\n", ntf_opcode);
break;
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index 93b914937263c..ee094dfab2edd 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -196,6 +196,23 @@ static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
}
}
+static void nci_nfcee_discover_rsp_packet(struct nci_dev *ndev,
+ struct sk_buff *skb)
+{
+ struct nci_nfcee_discover_rsp *discover_rsp;
+
+ if (skb->len != 2) {
+ nci_req_complete(ndev, NCI_STATUS_NFCEE_PROTOCOL_ERROR);
+ return;
+ }
+
+ discover_rsp = (struct nci_nfcee_discover_rsp *)skb->data;
+
+ if (discover_rsp->status != NCI_STATUS_OK ||
+ discover_rsp->num_nfcee == 0)
+ nci_req_complete(ndev, discover_rsp->status);
+}
+
void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
__u16 rsp_opcode = nci_opcode(skb->data);
@@ -241,6 +258,10 @@ void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
nci_rf_deactivate_rsp_packet(ndev, skb);
break;
+ case NCI_OP_NFCEE_DISCOVER_RSP:
+ nci_nfcee_discover_rsp_packet(ndev, skb);
+ break;
+
default:
pr_err("unknown rsp opcode 0x%x\n", rsp_opcode);
break;