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NFC: nci: Add NFCEE discover support

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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>
This commit is contained in:
Christophe Ricard 2015-02-01 22:26:10 +01:00 committed by Samuel Ortiz
parent 8277f6937a
commit af9c8aa67d
4 changed files with 72 additions and 0 deletions
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4
include/net/nfc/nci_core.h
View file

@ -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)

17
net/nfc/nci/core.c
View file

@ -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);

30
net/nfc/nci/ntf.c
View file

@ -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;

21
net/nfc/nci/rsp.c
View file

@ -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;