466 lines
13 KiB
C
466 lines
13 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* The NFC Controller Interface is the communication protocol between an
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* NFC Controller (NFCC) and a Device Host (DH).
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*
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* Copyright (C) 2011 Texas Instruments, Inc.
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* Copyright (C) 2013 Intel Corporation. All rights reserved.
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* Copyright (C) 2014 Marvell International Ltd.
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*
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* Written by Ilan Elias <ilane@ti.com>
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*
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* Acknowledgements:
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* This file is based on hci_core.h, which was written
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* by Maxim Krasnyansky.
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*/
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#ifndef __NCI_CORE_H
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#define __NCI_CORE_H
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#include <linux/interrupt.h>
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#include <linux/skbuff.h>
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#include <linux/tty.h>
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#include <net/nfc/nfc.h>
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#include <net/nfc/nci.h>
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/* NCI device flags */
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enum nci_flag {
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NCI_INIT,
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NCI_UP,
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NCI_DATA_EXCHANGE,
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NCI_DATA_EXCHANGE_TO,
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NCI_UNREG,
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};
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/* NCI device states */
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enum nci_state {
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NCI_IDLE,
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NCI_DISCOVERY,
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NCI_W4_ALL_DISCOVERIES,
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NCI_W4_HOST_SELECT,
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NCI_POLL_ACTIVE,
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NCI_LISTEN_ACTIVE,
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NCI_LISTEN_SLEEP,
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};
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/* NCI timeouts */
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#define NCI_RESET_TIMEOUT 5000
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#define NCI_INIT_TIMEOUT 5000
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#define NCI_SET_CONFIG_TIMEOUT 5000
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#define NCI_RF_DISC_TIMEOUT 5000
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#define NCI_RF_DISC_SELECT_TIMEOUT 5000
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#define NCI_RF_DEACTIVATE_TIMEOUT 30000
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#define NCI_CMD_TIMEOUT 5000
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#define NCI_DATA_TIMEOUT 700
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struct nci_dev;
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struct nci_driver_ops {
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__u16 opcode;
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int (*rsp)(struct nci_dev *dev, struct sk_buff *skb);
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int (*ntf)(struct nci_dev *dev, struct sk_buff *skb);
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};
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struct nci_ops {
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int (*init)(struct nci_dev *ndev);
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int (*open)(struct nci_dev *ndev);
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int (*close)(struct nci_dev *ndev);
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int (*send)(struct nci_dev *ndev, struct sk_buff *skb);
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int (*setup)(struct nci_dev *ndev);
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int (*post_setup)(struct nci_dev *ndev);
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int (*fw_download)(struct nci_dev *ndev, const char *firmware_name);
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__u32 (*get_rfprotocol)(struct nci_dev *ndev, __u8 rf_protocol);
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int (*discover_se)(struct nci_dev *ndev);
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int (*disable_se)(struct nci_dev *ndev, u32 se_idx);
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int (*enable_se)(struct nci_dev *ndev, u32 se_idx);
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int (*se_io)(struct nci_dev *ndev, u32 se_idx,
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u8 *apdu, size_t apdu_length,
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se_io_cb_t cb, void *cb_context);
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int (*hci_load_session)(struct nci_dev *ndev);
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void (*hci_event_received)(struct nci_dev *ndev, u8 pipe, u8 event,
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struct sk_buff *skb);
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void (*hci_cmd_received)(struct nci_dev *ndev, u8 pipe, u8 cmd,
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struct sk_buff *skb);
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const struct nci_driver_ops *prop_ops;
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size_t n_prop_ops;
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const struct nci_driver_ops *core_ops;
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size_t n_core_ops;
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};
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#define NCI_MAX_SUPPORTED_RF_INTERFACES 4
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#define NCI_MAX_DISCOVERED_TARGETS 10
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#define NCI_MAX_NUM_NFCEE 255
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#define NCI_MAX_CONN_ID 7
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#define NCI_MAX_PROPRIETARY_CMD 64
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struct nci_conn_info {
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struct list_head list;
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/* NCI specification 4.4.2 Connection Creation
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* The combination of destination type and destination specific
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* parameters shall uniquely identify a single destination for the
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* Logical Connection
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*/
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struct dest_spec_params *dest_params;
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__u8 dest_type;
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__u8 conn_id;
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__u8 max_pkt_payload_len;
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atomic_t credits_cnt;
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__u8 initial_num_credits;
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data_exchange_cb_t data_exchange_cb;
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void *data_exchange_cb_context;
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struct sk_buff *rx_skb;
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};
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#define NCI_INVALID_CONN_ID 0x80
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#define NCI_HCI_ANY_OPEN_PIPE 0x03
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/* Gates */
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#define NCI_HCI_ADMIN_GATE 0x00
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#define NCI_HCI_LOOPBACK_GATE 0x04
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#define NCI_HCI_IDENTITY_MGMT_GATE 0x05
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#define NCI_HCI_LINK_MGMT_GATE 0x06
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/* Pipes */
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#define NCI_HCI_LINK_MGMT_PIPE 0x00
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#define NCI_HCI_ADMIN_PIPE 0x01
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/* Generic responses */
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#define NCI_HCI_ANY_OK 0x00
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#define NCI_HCI_ANY_E_NOT_CONNECTED 0x01
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#define NCI_HCI_ANY_E_CMD_PAR_UNKNOWN 0x02
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#define NCI_HCI_ANY_E_NOK 0x03
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#define NCI_HCI_ANY_E_PIPES_FULL 0x04
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#define NCI_HCI_ANY_E_REG_PAR_UNKNOWN 0x05
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#define NCI_HCI_ANY_E_PIPE_NOT_OPENED 0x06
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#define NCI_HCI_ANY_E_CMD_NOT_SUPPORTED 0x07
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#define NCI_HCI_ANY_E_INHIBITED 0x08
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#define NCI_HCI_ANY_E_TIMEOUT 0x09
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#define NCI_HCI_ANY_E_REG_ACCESS_DENIED 0x0a
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#define NCI_HCI_ANY_E_PIPE_ACCESS_DENIED 0x0b
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#define NCI_HCI_DO_NOT_OPEN_PIPE 0x81
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#define NCI_HCI_INVALID_PIPE 0x80
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#define NCI_HCI_INVALID_GATE 0xFF
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#define NCI_HCI_INVALID_HOST 0x80
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#define NCI_HCI_MAX_CUSTOM_GATES 50
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/*
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* According to specification 102 622 chapter 4.4 Pipes,
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* the pipe identifier is 7 bits long.
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*/
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#define NCI_HCI_MAX_PIPES 128
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struct nci_hci_gate {
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u8 gate;
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u8 pipe;
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u8 dest_host;
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} __packed;
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struct nci_hci_pipe {
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u8 gate;
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u8 host;
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} __packed;
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struct nci_hci_init_data {
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u8 gate_count;
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struct nci_hci_gate gates[NCI_HCI_MAX_CUSTOM_GATES];
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char session_id[9];
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};
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#define NCI_HCI_MAX_GATES 256
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struct nci_hci_dev {
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u8 nfcee_id;
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struct nci_dev *ndev;
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struct nci_conn_info *conn_info;
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struct nci_hci_init_data init_data;
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struct nci_hci_pipe pipes[NCI_HCI_MAX_PIPES];
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u8 gate2pipe[NCI_HCI_MAX_GATES];
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int expected_pipes;
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int count_pipes;
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struct sk_buff_head rx_hcp_frags;
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struct work_struct msg_rx_work;
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struct sk_buff_head msg_rx_queue;
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};
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/* NCI Core structures */
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struct nci_dev {
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struct nfc_dev *nfc_dev;
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const struct nci_ops *ops;
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struct nci_hci_dev *hci_dev;
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int tx_headroom;
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int tx_tailroom;
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atomic_t state;
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unsigned long flags;
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atomic_t cmd_cnt;
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__u8 cur_conn_id;
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struct list_head conn_info_list;
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struct nci_conn_info *rf_conn_info;
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struct timer_list cmd_timer;
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struct timer_list data_timer;
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struct workqueue_struct *cmd_wq;
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struct work_struct cmd_work;
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struct workqueue_struct *rx_wq;
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struct work_struct rx_work;
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struct workqueue_struct *tx_wq;
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struct work_struct tx_work;
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struct sk_buff_head cmd_q;
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struct sk_buff_head rx_q;
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struct sk_buff_head tx_q;
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struct mutex req_lock;
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struct completion req_completion;
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__u32 req_status;
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__u32 req_result;
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void *driver_data;
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__u32 poll_prots;
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__u32 target_active_prot;
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struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS];
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int n_targets;
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/* received during NCI_OP_CORE_RESET_RSP */
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__u8 nci_ver;
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/* received during NCI_OP_CORE_INIT_RSP */
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__u32 nfcc_features;
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__u8 num_supported_rf_interfaces;
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__u8 supported_rf_interfaces
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[NCI_MAX_SUPPORTED_RF_INTERFACES];
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__u8 max_logical_connections;
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__u16 max_routing_table_size;
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__u8 max_ctrl_pkt_payload_len;
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__u16 max_size_for_large_params;
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__u8 manufact_id;
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__u32 manufact_specific_info;
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/* Save RF Discovery ID or NFCEE ID under conn_create */
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struct dest_spec_params cur_params;
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/* Save destination type under conn_create */
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__u8 cur_dest_type;
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/* stored during nci_data_exchange */
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struct sk_buff *rx_data_reassembly;
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/* stored during intf_activated_ntf */
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__u8 remote_gb[NFC_MAX_GT_LEN];
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__u8 remote_gb_len;
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};
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/* ----- NCI Devices ----- */
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struct nci_dev *nci_allocate_device(const struct nci_ops *ops,
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__u32 supported_protocols,
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int tx_headroom,
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int tx_tailroom);
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void nci_free_device(struct nci_dev *ndev);
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int nci_register_device(struct nci_dev *ndev);
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void nci_unregister_device(struct nci_dev *ndev);
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int nci_request(struct nci_dev *ndev,
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void (*req)(struct nci_dev *ndev,
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const void *opt),
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const void *opt, __u32 timeout);
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int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len,
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const __u8 *payload);
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int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
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const __u8 *payload);
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int nci_core_reset(struct nci_dev *ndev);
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int nci_core_init(struct nci_dev *ndev);
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int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
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int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb);
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int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val);
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int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
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int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode);
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int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
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u8 number_destination_params,
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size_t params_len,
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const struct core_conn_create_dest_spec_params *params);
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int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
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int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
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struct sk_buff **resp);
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struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev);
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void nci_hci_deallocate(struct nci_dev *ndev);
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int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,
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const u8 *param, size_t param_len);
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int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate,
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u8 cmd, const u8 *param, size_t param_len,
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struct sk_buff **skb);
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int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe);
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int nci_hci_connect_gate(struct nci_dev *ndev, u8 dest_host,
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u8 dest_gate, u8 pipe);
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int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
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const u8 *param, size_t param_len);
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int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
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struct sk_buff **skb);
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int nci_hci_clear_all_pipes(struct nci_dev *ndev);
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int nci_hci_dev_session_init(struct nci_dev *ndev);
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static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
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unsigned int len,
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gfp_t how)
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{
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struct sk_buff *skb;
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skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
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if (skb)
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skb_reserve(skb, ndev->tx_headroom);
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return skb;
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}
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static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
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{
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nfc_set_parent_dev(ndev->nfc_dev, dev);
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}
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static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
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{
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ndev->driver_data = data;
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}
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static inline void *nci_get_drvdata(struct nci_dev *ndev)
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{
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return ndev->driver_data;
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}
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static inline int nci_set_vendor_cmds(struct nci_dev *ndev,
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|
const struct nfc_vendor_cmd *cmds,
|
||
|
|
int n_cmds)
|
||
|
|
{
|
||
|
|
return nfc_set_vendor_cmds(ndev->nfc_dev, cmds, n_cmds);
|
||
|
|
}
|
||
|
|
|
||
|
|
void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
|
||
|
|
void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
|
||
|
|
int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
|
||
|
|
struct sk_buff *skb);
|
||
|
|
int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
|
||
|
|
struct sk_buff *skb);
|
||
|
|
int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
|
||
|
|
struct sk_buff *skb);
|
||
|
|
int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
|
||
|
|
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, const void *payload);
|
||
|
|
int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
|
||
|
|
int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id);
|
||
|
|
void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
|
||
|
|
__u8 conn_id, int err);
|
||
|
|
void nci_hci_data_received_cb(void *context, 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);
|
||
|
|
struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
|
||
|
|
int conn_id);
|
||
|
|
int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
|
||
|
|
const struct dest_spec_params *params);
|
||
|
|
|
||
|
|
/* ----- 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 */
|
||
|
|
|
||
|
|
unsigned int xfer_speed_hz; /*
|
||
|
|
* SPI clock frequency
|
||
|
|
* 0 => default clock
|
||
|
|
*/
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
/* ----- NCI UART ---- */
|
||
|
|
|
||
|
|
/* Ioctl */
|
||
|
|
#define NCIUARTSETDRIVER _IOW('U', 0, char *)
|
||
|
|
|
||
|
|
enum nci_uart_driver {
|
||
|
|
NCI_UART_DRIVER_MARVELL = 0,
|
||
|
|
NCI_UART_DRIVER_MAX
|
||
|
|
};
|
||
|
|
|
||
|
|
struct nci_uart;
|
||
|
|
|
||
|
|
struct nci_uart_ops {
|
||
|
|
int (*open)(struct nci_uart *nci_uart);
|
||
|
|
void (*close)(struct nci_uart *nci_uart);
|
||
|
|
int (*recv)(struct nci_uart *nci_uart, struct sk_buff *skb);
|
||
|
|
int (*send)(struct nci_uart *nci_uart, struct sk_buff *skb);
|
||
|
|
void (*tx_start)(struct nci_uart *nci_uart);
|
||
|
|
void (*tx_done)(struct nci_uart *nci_uart);
|
||
|
|
};
|
||
|
|
|
||
|
|
struct nci_uart {
|
||
|
|
struct module *owner;
|
||
|
|
struct nci_uart_ops ops;
|
||
|
|
const char *name;
|
||
|
|
enum nci_uart_driver driver;
|
||
|
|
|
||
|
|
/* Dynamic data */
|
||
|
|
struct nci_dev *ndev;
|
||
|
|
spinlock_t rx_lock;
|
||
|
|
struct work_struct write_work;
|
||
|
|
struct tty_struct *tty;
|
||
|
|
unsigned long tx_state;
|
||
|
|
struct sk_buff_head tx_q;
|
||
|
|
struct sk_buff *tx_skb;
|
||
|
|
struct sk_buff *rx_skb;
|
||
|
|
int rx_packet_len;
|
||
|
|
void *drv_data;
|
||
|
|
};
|
||
|
|
|
||
|
|
int nci_uart_register(struct nci_uart *nu);
|
||
|
|
void nci_uart_unregister(struct nci_uart *nu);
|
||
|
|
void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl);
|
||
|
|
|
||
|
|
#endif /* __NCI_CORE_H */
|