232 lines
5.9 KiB
C
232 lines
5.9 KiB
C
/*
|
|
* The NFC Controller Interface is the communication protocol between an
|
|
* NFC Controller (NFCC) and a Device Host (DH).
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments, Inc.
|
|
* Copyright (C) 2013 Intel Corporation. All rights reserved.
|
|
*
|
|
* Written by Ilan Elias <ilane@ti.com>
|
|
*
|
|
* Acknowledgements:
|
|
* This file is based on hci_core.h, which was written
|
|
* by Maxim Krasnyansky.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef __NCI_CORE_H
|
|
#define __NCI_CORE_H
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <net/nfc/nfc.h>
|
|
#include <net/nfc/nci.h>
|
|
|
|
/* NCI device flags */
|
|
enum nci_flag {
|
|
NCI_INIT,
|
|
NCI_UP,
|
|
NCI_DATA_EXCHANGE,
|
|
NCI_DATA_EXCHANGE_TO,
|
|
};
|
|
|
|
/* NCI device states */
|
|
enum nci_state {
|
|
NCI_IDLE,
|
|
NCI_DISCOVERY,
|
|
NCI_W4_ALL_DISCOVERIES,
|
|
NCI_W4_HOST_SELECT,
|
|
NCI_POLL_ACTIVE,
|
|
};
|
|
|
|
/* NCI timeouts */
|
|
#define NCI_RESET_TIMEOUT 5000
|
|
#define NCI_INIT_TIMEOUT 5000
|
|
#define NCI_SET_CONFIG_TIMEOUT 5000
|
|
#define NCI_RF_DISC_TIMEOUT 5000
|
|
#define NCI_RF_DISC_SELECT_TIMEOUT 5000
|
|
#define NCI_RF_DEACTIVATE_TIMEOUT 30000
|
|
#define NCI_CMD_TIMEOUT 5000
|
|
#define NCI_DATA_TIMEOUT 700
|
|
|
|
struct nci_dev;
|
|
|
|
struct nci_ops {
|
|
int (*open)(struct nci_dev *ndev);
|
|
int (*close)(struct nci_dev *ndev);
|
|
int (*send)(struct nci_dev *ndev, struct sk_buff *skb);
|
|
int (*setup)(struct nci_dev *ndev);
|
|
};
|
|
|
|
#define NCI_MAX_SUPPORTED_RF_INTERFACES 4
|
|
#define NCI_MAX_DISCOVERED_TARGETS 10
|
|
|
|
/* NCI Core structures */
|
|
struct nci_dev {
|
|
struct nfc_dev *nfc_dev;
|
|
struct nci_ops *ops;
|
|
|
|
int tx_headroom;
|
|
int tx_tailroom;
|
|
|
|
atomic_t state;
|
|
unsigned long flags;
|
|
|
|
atomic_t cmd_cnt;
|
|
atomic_t credits_cnt;
|
|
|
|
struct timer_list cmd_timer;
|
|
struct timer_list data_timer;
|
|
|
|
struct workqueue_struct *cmd_wq;
|
|
struct work_struct cmd_work;
|
|
|
|
struct workqueue_struct *rx_wq;
|
|
struct work_struct rx_work;
|
|
|
|
struct workqueue_struct *tx_wq;
|
|
struct work_struct tx_work;
|
|
|
|
struct sk_buff_head cmd_q;
|
|
struct sk_buff_head rx_q;
|
|
struct sk_buff_head tx_q;
|
|
|
|
struct mutex req_lock;
|
|
struct completion req_completion;
|
|
__u32 req_status;
|
|
__u32 req_result;
|
|
|
|
void *driver_data;
|
|
|
|
__u32 poll_prots;
|
|
__u32 target_active_prot;
|
|
|
|
struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS];
|
|
int n_targets;
|
|
|
|
/* received during NCI_OP_CORE_RESET_RSP */
|
|
__u8 nci_ver;
|
|
|
|
/* received during NCI_OP_CORE_INIT_RSP */
|
|
__u32 nfcc_features;
|
|
__u8 num_supported_rf_interfaces;
|
|
__u8 supported_rf_interfaces
|
|
[NCI_MAX_SUPPORTED_RF_INTERFACES];
|
|
__u8 max_logical_connections;
|
|
__u16 max_routing_table_size;
|
|
__u8 max_ctrl_pkt_payload_len;
|
|
__u16 max_size_for_large_params;
|
|
__u8 manufact_id;
|
|
__u32 manufact_specific_info;
|
|
|
|
/* received during NCI_OP_RF_INTF_ACTIVATED_NTF */
|
|
__u8 max_data_pkt_payload_size;
|
|
__u8 initial_num_credits;
|
|
|
|
/* stored during nci_data_exchange */
|
|
data_exchange_cb_t data_exchange_cb;
|
|
void *data_exchange_cb_context;
|
|
struct sk_buff *rx_data_reassembly;
|
|
|
|
/* stored during intf_activated_ntf */
|
|
__u8 remote_gb[NFC_MAX_GT_LEN];
|
|
__u8 remote_gb_len;
|
|
};
|
|
|
|
/* ----- NCI Devices ----- */
|
|
struct nci_dev *nci_allocate_device(struct nci_ops *ops,
|
|
__u32 supported_protocols,
|
|
int tx_headroom,
|
|
int tx_tailroom);
|
|
void nci_free_device(struct nci_dev *ndev);
|
|
int nci_register_device(struct nci_dev *ndev);
|
|
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);
|
|
|
|
static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
|
|
unsigned int len,
|
|
gfp_t how)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
|
|
if (skb)
|
|
skb_reserve(skb, ndev->tx_headroom);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
|
|
{
|
|
nfc_set_parent_dev(ndev->nfc_dev, dev);
|
|
}
|
|
|
|
static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
|
|
{
|
|
ndev->driver_data = data;
|
|
}
|
|
|
|
static inline void *nci_get_drvdata(struct nci_dev *ndev)
|
|
{
|
|
return ndev->driver_data;
|
|
}
|
|
|
|
void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
|
|
void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
|
|
void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
|
|
int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
|
|
int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
|
|
void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
|
|
int err);
|
|
void nci_clear_target_list(struct nci_dev *ndev);
|
|
|
|
/* ----- NCI requests ----- */
|
|
#define NCI_REQ_DONE 0
|
|
#define NCI_REQ_PEND 1
|
|
#define NCI_REQ_CANCELED 2
|
|
|
|
void nci_req_complete(struct nci_dev *ndev, int result);
|
|
|
|
/* ----- NCI status code ----- */
|
|
int nci_to_errno(__u8 code);
|
|
|
|
/* ----- NCI over SPI acknowledge modes ----- */
|
|
#define NCI_SPI_CRC_DISABLED 0x00
|
|
#define NCI_SPI_CRC_ENABLED 0x01
|
|
|
|
/* ----- NCI SPI structures ----- */
|
|
struct nci_spi {
|
|
struct nci_dev *ndev;
|
|
struct spi_device *spi;
|
|
|
|
unsigned int xfer_udelay; /* microseconds delay between
|
|
transactions */
|
|
u8 acknowledge_mode;
|
|
|
|
struct completion req_completion;
|
|
u8 req_result;
|
|
};
|
|
|
|
/* ----- NCI SPI ----- */
|
|
struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
|
|
u8 acknowledge_mode, unsigned int delay,
|
|
struct nci_dev *ndev);
|
|
int nci_spi_send(struct nci_spi *nspi,
|
|
struct completion *write_handshake_completion,
|
|
struct sk_buff *skb);
|
|
struct sk_buff *nci_spi_read(struct nci_spi *nspi);
|
|
|
|
#endif /* __NCI_CORE_H */
|