245 lines
6.5 KiB
C
245 lines
6.5 KiB
C
/*
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* Copyright (C) 2011 Instituto Nokia de Tecnologia
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*
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* Authors:
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* Lauro Ramos Venancio <lauro.venancio@openbossa.org>
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* Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __NET_NFC_H
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#define __NET_NFC_H
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#include <linux/nfc.h>
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#include <linux/device.h>
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#include <linux/skbuff.h>
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#define nfc_dev_info(dev, fmt, arg...) dev_info((dev), "NFC: " fmt "\n", ## arg)
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#define nfc_dev_err(dev, fmt, arg...) dev_err((dev), "NFC: " fmt "\n", ## arg)
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#define nfc_dev_dbg(dev, fmt, arg...) dev_dbg((dev), fmt "\n", ## arg)
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struct nfc_dev;
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/**
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* data_exchange_cb_t - Definition of nfc_data_exchange callback
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*
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* @context: nfc_data_exchange cb_context parameter
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* @skb: response data
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* @err: If an error has occurred during data exchange, it is the
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* error number. Zero means no error.
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*
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* When a rx or tx package is lost or corrupted or the target gets out
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* of the operating field, err is -EIO.
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*/
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typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,
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int err);
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struct nfc_target;
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struct nfc_ops {
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int (*dev_up)(struct nfc_dev *dev);
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int (*dev_down)(struct nfc_dev *dev);
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int (*start_poll)(struct nfc_dev *dev,
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u32 im_protocols, u32 tm_protocols);
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void (*stop_poll)(struct nfc_dev *dev);
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int (*dep_link_up)(struct nfc_dev *dev, struct nfc_target *target,
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u8 comm_mode, u8 *gb, size_t gb_len);
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int (*dep_link_down)(struct nfc_dev *dev);
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int (*activate_target)(struct nfc_dev *dev, struct nfc_target *target,
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u32 protocol);
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void (*deactivate_target)(struct nfc_dev *dev,
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struct nfc_target *target);
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int (*im_transceive)(struct nfc_dev *dev, struct nfc_target *target,
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struct sk_buff *skb, data_exchange_cb_t cb,
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void *cb_context);
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int (*tm_send)(struct nfc_dev *dev, struct sk_buff *skb);
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int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target);
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int (*fw_upload)(struct nfc_dev *dev, const char *firmware_name);
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/* Secure Element API */
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int (*discover_se)(struct nfc_dev *dev);
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int (*enable_se)(struct nfc_dev *dev, u32 se_idx);
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int (*disable_se)(struct nfc_dev *dev, u32 se_idx);
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};
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#define NFC_TARGET_IDX_ANY -1
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#define NFC_MAX_GT_LEN 48
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#define NFC_ATR_RES_GT_OFFSET 15
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struct nfc_target {
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u32 idx;
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u32 supported_protocols;
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u16 sens_res;
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u8 sel_res;
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u8 nfcid1_len;
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u8 nfcid1[NFC_NFCID1_MAXSIZE];
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u8 nfcid2_len;
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u8 nfcid2[NFC_NFCID2_MAXSIZE];
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u8 sensb_res_len;
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u8 sensb_res[NFC_SENSB_RES_MAXSIZE];
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u8 sensf_res_len;
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u8 sensf_res[NFC_SENSF_RES_MAXSIZE];
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u8 hci_reader_gate;
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u8 logical_idx;
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};
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/**
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* nfc_se - A structure for NFC accessible secure elements.
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*
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* @idx: The secure element index. User space will enable or
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* disable a secure element by its index.
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* @type: The secure element type. It can be SE_UICC or
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* SE_EMBEDDED.
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* @state: The secure element state, either enabled or disabled.
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*
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*/
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struct nfc_se {
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struct list_head list;
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u32 idx;
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u16 type;
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u16 state;
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};
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struct nfc_genl_data {
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u32 poll_req_portid;
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struct mutex genl_data_mutex;
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};
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struct nfc_dev {
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int idx;
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u32 target_next_idx;
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struct nfc_target *targets;
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int n_targets;
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int targets_generation;
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struct device dev;
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bool dev_up;
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bool fw_upload_in_progress;
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u8 rf_mode;
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bool polling;
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struct nfc_target *active_target;
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bool dep_link_up;
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struct nfc_genl_data genl_data;
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u32 supported_protocols;
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struct list_head secure_elements;
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int tx_headroom;
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int tx_tailroom;
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struct timer_list check_pres_timer;
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struct work_struct check_pres_work;
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bool shutting_down;
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struct rfkill *rfkill;
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struct nfc_ops *ops;
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};
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#define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)
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extern struct class nfc_class;
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struct nfc_dev *nfc_allocate_device(struct nfc_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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/**
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* nfc_free_device - free nfc device
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*
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* @dev: The nfc device to free
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*/
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static inline void nfc_free_device(struct nfc_dev *dev)
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{
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put_device(&dev->dev);
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}
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int nfc_register_device(struct nfc_dev *dev);
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void nfc_unregister_device(struct nfc_dev *dev);
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/**
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* nfc_set_parent_dev - set the parent device
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*
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* @nfc_dev: The nfc device whose parent is being set
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* @dev: The parent device
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*/
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static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev,
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struct device *dev)
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{
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nfc_dev->dev.parent = dev;
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}
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/**
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* nfc_set_drvdata - set driver specifc data
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*
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* @dev: The nfc device
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* @data: Pointer to driver specifc data
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*/
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static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data)
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{
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dev_set_drvdata(&dev->dev, data);
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}
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/**
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* nfc_get_drvdata - get driver specifc data
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*
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* @dev: The nfc device
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*/
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static inline void *nfc_get_drvdata(struct nfc_dev *dev)
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{
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return dev_get_drvdata(&dev->dev);
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}
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/**
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* nfc_device_name - get the nfc device name
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*
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* @dev: The nfc device whose name to return
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*/
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static inline const char *nfc_device_name(struct nfc_dev *dev)
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{
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return dev_name(&dev->dev);
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}
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struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
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unsigned int flags, unsigned int size,
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unsigned int *err);
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struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp);
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int nfc_set_remote_general_bytes(struct nfc_dev *dev,
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u8 *gt, u8 gt_len);
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u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len);
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int nfc_targets_found(struct nfc_dev *dev,
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struct nfc_target *targets, int ntargets);
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int nfc_target_lost(struct nfc_dev *dev, u32 target_idx);
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int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
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u8 comm_mode, u8 rf_mode);
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int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
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u8 *gb, size_t gb_len);
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int nfc_tm_deactivated(struct nfc_dev *dev);
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int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb);
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void nfc_driver_failure(struct nfc_dev *dev, int err);
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int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type);
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int nfc_remove_se(struct nfc_dev *dev, u32 se_idx);
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#endif /* __NET_NFC_H */
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