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NFC: nci: Support logical connections management

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In order to communicate with an NFCEE, we need to open a logical
connection to it, by sending the NCI_OP_CORE_CONN_CREATE_CMD
command to the NFCC. It's left up to the drivers to decide when
to close an already opened logical connection.

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 22:26:12 +01:00 committed by Samuel Ortiz
parent f7f793f313
commit 736bb95774
4 changed files with 118 additions and 0 deletions
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30
include/net/nfc/nci.h
View File

@ -243,6 +243,26 @@ struct nci_core_set_config_cmd {
struct set_config_param param; /* support 1 param per cmd is enough */
} __packed;
#define NCI_OP_CORE_CONN_CREATE_CMD nci_opcode_pack(NCI_GID_CORE, 0x04)
struct dest_spec_params {
__u8 id;
__u8 protocol;
} __packed;
struct core_conn_create_dest_spec_params {
__u8 type;
__u8 length;
struct dest_spec_params value;
} __packed;
struct nci_core_conn_create_cmd {
__u8 destination_type;
__u8 number_destination_params;
struct core_conn_create_dest_spec_params params;
} __packed;
#define NCI_OP_CORE_CONN_CLOSE_CMD nci_opcode_pack(NCI_GID_CORE, 0x05)
#define NCI_OP_RF_DISCOVER_MAP_CMD nci_opcode_pack(NCI_GID_RF_MGMT, 0x00)
struct disc_map_config {
__u8 rf_protocol;
@ -327,6 +347,16 @@ struct nci_core_set_config_rsp {
__u8 params_id[0]; /* variable size array */
} __packed;
#define NCI_OP_CORE_CONN_CREATE_RSP nci_opcode_pack(NCI_GID_CORE, 0x04)
struct nci_core_conn_create_rsp {
__u8 status;
__u8 max_ctrl_pkt_payload_len;
__u8 credits;
__u8 conn_id;
} __packed;
#define NCI_OP_CORE_CONN_CLOSE_RSP nci_opcode_pack(NCI_GID_CORE, 0x05)
#define NCI_OP_RF_DISCOVER_MAP_RSP nci_opcode_pack(NCI_GID_RF_MGMT, 0x00)
#define NCI_OP_RF_DISCOVER_RSP nci_opcode_pack(NCI_GID_RF_MGMT, 0x03)

3
include/net/nfc/nci_core.h
View File

@ -186,6 +186,9 @@ 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);
int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode);
int nci_core_conn_create(struct nci_dev *ndev,
struct core_conn_create_dest_spec_params *params);
int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
unsigned int len,

38
net/nfc/nci/core.c
View File

@ -507,6 +507,44 @@ int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
}
EXPORT_SYMBOL(nci_nfcee_mode_set);
static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt)
{
struct nci_core_conn_create_cmd cmd;
struct core_conn_create_dest_spec_params *params =
(struct core_conn_create_dest_spec_params *)opt;
cmd.destination_type = NCI_DESTINATION_NFCEE;
cmd.number_destination_params = 1;
memcpy(&cmd.params.type, params,
sizeof(struct core_conn_create_dest_spec_params));
nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD,
sizeof(struct nci_core_conn_create_cmd), &cmd);
}
int nci_core_conn_create(struct nci_dev *ndev,
struct core_conn_create_dest_spec_params *params)
{
ndev->cur_id = params->value.id;
return nci_request(ndev, nci_core_conn_create_req,
(unsigned long)params,
msecs_to_jiffies(NCI_CMD_TIMEOUT));
}
EXPORT_SYMBOL(nci_core_conn_create);
static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt)
{
__u8 conn_id = opt;
nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
}
int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
{
return nci_request(ndev, nci_core_conn_close_req, conn_id,
msecs_to_jiffies(NCI_CMD_TIMEOUT));
}
EXPORT_SYMBOL(nci_core_conn_close);
static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
{
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);

47
net/nfc/nci/rsp.c
View File

@ -222,6 +222,45 @@ static void nci_nfcee_mode_set_rsp_packet(struct nci_dev *ndev,
nci_req_complete(ndev, status);
}
static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev,
struct sk_buff *skb)
{
__u8 status = skb->data[0];
struct nci_conn_info *conn_info;
struct nci_core_conn_create_rsp *rsp;
pr_debug("status 0x%x\n", status);
if (status == NCI_STATUS_OK) {
rsp = (struct nci_core_conn_create_rsp *)skb->data;
list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
if (conn_info->id == ndev->cur_id)
break;
}
if (!conn_info || conn_info->id != ndev->cur_id) {
status = NCI_STATUS_REJECTED;
goto exit;
}
conn_info->conn_id = rsp->conn_id;
conn_info->max_pkt_payload_len = rsp->max_ctrl_pkt_payload_len;
atomic_set(&conn_info->credits_cnt, rsp->credits);
}
exit:
nci_req_complete(ndev, status);
}
static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev,
struct sk_buff *skb)
{
__u8 status = skb->data[0];
pr_debug("status 0x%x\n", status);
nci_req_complete(ndev, status);
}
void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
{
__u16 rsp_opcode = nci_opcode(skb->data);
@ -251,6 +290,14 @@ void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
nci_core_set_config_rsp_packet(ndev, skb);
break;
case NCI_OP_CORE_CONN_CREATE_RSP:
nci_core_conn_create_rsp_packet(ndev, skb);
break;
case NCI_OP_CORE_CONN_CLOSE_RSP:
nci_core_conn_close_rsp_packet(ndev, skb);
break;
case NCI_OP_RF_DISCOVER_MAP_RSP:
nci_rf_disc_map_rsp_packet(ndev, skb);
break;