Commit 736bb957 authored by Christophe Ricard's avatar Christophe Ricard Committed by Samuel Ortiz
Browse files

NFC: nci: Support logical connections management 



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: default avatarChristophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent f7f793f3

include/net/nfc/nci.h

+30 −0
Original line number Diff line number Diff line
@@ -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)

include/net/nfc/nci_core.h

+3 −0
Original line number Diff line number Diff line
@@ -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,

net/nfc/nci/core.c

+38 −0
Original line number Diff line number Diff line
@@ -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);

net/nfc/nci/rsp.c

+47 −0
Original line number Diff line number Diff line
@@ -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;

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