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linux/include/net/nfc/hci.h
Waldemar Rymarkiewicz 96e324024b NFC: xmit from hci ops must return 0 or negative 
xmit callback provided by a driver encapsulates upper layers
data and sends it to the hardware. So, HCI does not know the
exact amount of data being sent and thus can't handle partially
sent frames properly.

Therefore, the driver must return 0 for completely sent frame or
negative for failure.

Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Acked-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-09-25 00:17:27 +02:00

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/*
* Copyright (C) 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __NET_HCI_H
#define __NET_HCI_H
#include <linux/skbuff.h>
#include <net/nfc/nfc.h>
struct nfc_hci_dev;
struct nfc_hci_ops {
int (*open) (struct nfc_hci_dev *hdev);
void (*close) (struct nfc_hci_dev *hdev);
int (*hci_ready) (struct nfc_hci_dev *hdev);
/*
* xmit must always send the complete buffer before
* returning. Returned result must be 0 for success
* or negative for failure.
*/
int (*xmit) (struct nfc_hci_dev *hdev, struct sk_buff *skb);
int (*start_poll) (struct nfc_hci_dev *hdev,
u32 im_protocols, u32 tm_protocols);
int (*target_from_gate) (struct nfc_hci_dev *hdev, u8 gate,
struct nfc_target *target);
int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
struct nfc_target *target);
int (*data_exchange) (struct nfc_hci_dev *hdev,
struct nfc_target *target, struct sk_buff *skb,
data_exchange_cb_t cb, void *cb_context);
int (*check_presence)(struct nfc_hci_dev *hdev,
struct nfc_target *target);
};
/* Pipes */
#define NFC_HCI_INVALID_PIPE 0x80
#define NFC_HCI_LINK_MGMT_PIPE 0x00
#define NFC_HCI_ADMIN_PIPE 0x01
struct nfc_hci_gate {
u8 gate;
u8 pipe;
};
#define NFC_HCI_MAX_CUSTOM_GATES 50
struct nfc_hci_init_data {
u8 gate_count;
struct nfc_hci_gate gates[NFC_HCI_MAX_CUSTOM_GATES];
char session_id[9];
};
typedef int (*xmit) (struct sk_buff *skb, void *cb_data);
#define NFC_HCI_MAX_GATES 256
struct nfc_hci_dev {
struct nfc_dev *ndev;
u32 max_data_link_payload;
struct mutex msg_tx_mutex;
struct list_head msg_tx_queue;
struct work_struct msg_tx_work;
struct timer_list cmd_timer;
struct hci_msg *cmd_pending_msg;
struct sk_buff_head rx_hcp_frags;
struct work_struct msg_rx_work;
struct sk_buff_head msg_rx_queue;
struct nfc_hci_ops *ops;
struct nfc_llc *llc;
struct nfc_hci_init_data init_data;
void *clientdata;
u8 gate2pipe[NFC_HCI_MAX_GATES];
u8 sw_romlib;
u8 sw_patch;
u8 sw_flashlib_major;
u8 sw_flashlib_minor;
u8 hw_derivative;
u8 hw_version;
u8 hw_mpw;
u8 hw_software;
u8 hw_bsid;
int async_cb_type;
data_exchange_cb_t async_cb;
void *async_cb_context;
};
/* hci device allocation */
struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
struct nfc_hci_init_data *init_data,
u32 protocols,
const char *llc_name,
int tx_headroom,
int tx_tailroom,
int max_link_payload);
void nfc_hci_free_device(struct nfc_hci_dev *hdev);
int nfc_hci_register_device(struct nfc_hci_dev *hdev);
void nfc_hci_unregister_device(struct nfc_hci_dev *hdev);
void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata);
void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev);
void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err);
/* Host IDs */
#define NFC_HCI_HOST_CONTROLLER_ID 0x00
#define NFC_HCI_TERMINAL_HOST_ID 0x01
#define NFC_HCI_UICC_HOST_ID 0x02
/* Host Controller Gates and registry indexes */
#define NFC_HCI_ADMIN_GATE 0x00
#define NFC_HCI_ADMIN_SESSION_IDENTITY 0x01
#define NFC_HCI_ADMIN_MAX_PIPE 0x02
#define NFC_HCI_ADMIN_WHITELIST 0x03
#define NFC_HCI_ADMIN_HOST_LIST 0x04
#define NFC_HCI_LOOPBACK_GATE 0x04
#define NFC_HCI_ID_MGMT_GATE 0x05
#define NFC_HCI_ID_MGMT_VERSION_SW 0x01
#define NFC_HCI_ID_MGMT_VERSION_HW 0x03
#define NFC_HCI_ID_MGMT_VENDOR_NAME 0x04
#define NFC_HCI_ID_MGMT_MODEL_ID 0x05
#define NFC_HCI_ID_MGMT_HCI_VERSION 0x02
#define NFC_HCI_ID_MGMT_GATES_LIST 0x06
#define NFC_HCI_LINK_MGMT_GATE 0x06
#define NFC_HCI_LINK_MGMT_REC_ERROR 0x01
#define NFC_HCI_RF_READER_B_GATE 0x11
#define NFC_HCI_RF_READER_B_PUPI 0x03
#define NFC_HCI_RF_READER_B_APPLICATION_DATA 0x04
#define NFC_HCI_RF_READER_B_AFI 0x02
#define NFC_HCI_RF_READER_B_HIGHER_LAYER_RESPONSE 0x01
#define NFC_HCI_RF_READER_B_HIGHER_LAYER_DATA 0x05
#define NFC_HCI_RF_READER_A_GATE 0x13
#define NFC_HCI_RF_READER_A_UID 0x02
#define NFC_HCI_RF_READER_A_ATQA 0x04
#define NFC_HCI_RF_READER_A_APPLICATION_DATA 0x05
#define NFC_HCI_RF_READER_A_SAK 0x03
#define NFC_HCI_RF_READER_A_FWI_SFGT 0x06
#define NFC_HCI_RF_READER_A_DATARATE_MAX 0x01
#define NFC_HCI_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
#define NFC_HCI_TYPE_A_SEL_PROT_MIFARE 0
#define NFC_HCI_TYPE_A_SEL_PROT_ISO14443 1
#define NFC_HCI_TYPE_A_SEL_PROT_DEP 2
#define NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP 3
/* Generic events */
#define NFC_HCI_EVT_HCI_END_OF_OPERATION 0x01
#define NFC_HCI_EVT_POST_DATA 0x02
#define NFC_HCI_EVT_HOT_PLUG 0x03
/* Reader RF gates events */
#define NFC_HCI_EVT_READER_REQUESTED 0x10
#define NFC_HCI_EVT_END_OPERATION 0x11
/* Reader Application gate events */
#define NFC_HCI_EVT_TARGET_DISCOVERED 0x10
/* receiving messages from lower layer */
void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
struct sk_buff *skb);
void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
struct sk_buff *skb);
void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
struct sk_buff *skb);
void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb);
/* connecting to gates and sending hci instructions */
int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
u8 pipe);
int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate);
int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev);
int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
struct sk_buff **skb);
int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
const u8 *param, size_t param_len);
int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
const u8 *param, size_t param_len, struct sk_buff **skb);
int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
const u8 *param, size_t param_len,
data_exchange_cb_t cb, void *cb_context);
int nfc_hci_send_response(struct nfc_hci_dev *hdev, u8 gate, u8 response,
const u8 *param, size_t param_len);
int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
const u8 *param, size_t param_len);
#endif /* __NET_HCI_H */
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