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linux-next/include/uapi/linux/nfc.h
Mark Greer 4d63adfe12 NFC: Add NFC_CMD_DEACTIVATE_TARGET support 
Once an NFC target (i.e., a tag) is found, it remains active until
there is a failure reading or writing it (often caused by the target
moving out of range).  While the target is active, the NFC adapter
and antenna must remain powered.  This wastes power when the target
remains in range but the client application no longer cares whether
it is there or not.

To mitigate this, add a new netlink command that allows userspace
to deactivate an active target.  When issued, this command will cause
the NFC subsystem to act as though the target was moved out of range.
Once the command has been executed, the client application can power
off the NFC adapter to reduce power consumption.

Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2017-11-10 00:03:39 +01:00

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/*
* Copyright (C) 2011 Instituto Nokia de Tecnologia
*
* Authors:
* Lauro Ramos Venancio <lauro.venancio@openbossa.org>
* Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __LINUX_NFC_H
#define __LINUX_NFC_H
#include <linux/types.h>
#include <linux/socket.h>
#define NFC_GENL_NAME "nfc"
#define NFC_GENL_VERSION 1
#define NFC_GENL_MCAST_EVENT_NAME "events"
/**
* enum nfc_commands - supported nfc commands
*
* @NFC_CMD_UNSPEC: unspecified command
*
* @NFC_CMD_GET_DEVICE: request information about a device (requires
* %NFC_ATTR_DEVICE_INDEX) or dump request to get a list of all nfc devices
* @NFC_CMD_DEV_UP: turn on the nfc device
* (requires %NFC_ATTR_DEVICE_INDEX)
* @NFC_CMD_DEV_DOWN: turn off the nfc device
* (requires %NFC_ATTR_DEVICE_INDEX)
* @NFC_CMD_START_POLL: start polling for targets using the given protocols
* (requires %NFC_ATTR_DEVICE_INDEX and %NFC_ATTR_PROTOCOLS)
* @NFC_CMD_STOP_POLL: stop polling for targets (requires
* %NFC_ATTR_DEVICE_INDEX)
* @NFC_CMD_GET_TARGET: dump all targets found by the previous poll (requires
* %NFC_ATTR_DEVICE_INDEX)
* @NFC_EVENT_TARGETS_FOUND: event emitted when a new target is found
* (it sends %NFC_ATTR_DEVICE_INDEX)
* @NFC_EVENT_DEVICE_ADDED: event emitted when a new device is registred
* (it sends %NFC_ATTR_DEVICE_NAME, %NFC_ATTR_DEVICE_INDEX and
* %NFC_ATTR_PROTOCOLS)
* @NFC_EVENT_DEVICE_REMOVED: event emitted when a device is removed
* (it sends %NFC_ATTR_DEVICE_INDEX)
* @NFC_EVENT_TM_ACTIVATED: event emitted when the adapter is activated in
* target mode.
* @NFC_EVENT_DEVICE_DEACTIVATED: event emitted when the adapter is deactivated
* from target mode.
* @NFC_CMD_LLC_GET_PARAMS: request LTO, RW, and MIUX parameters for a device
* @NFC_CMD_LLC_SET_PARAMS: set one or more of LTO, RW, and MIUX parameters for
* a device. LTO must be set before the link is up otherwise -EINPROGRESS
* is returned. RW and MIUX can be set at anytime and will be passed in
* subsequent CONNECT and CC messages.
* If one of the passed parameters is wrong none is set and -EINVAL is
* returned.
* @NFC_CMD_ENABLE_SE: Enable the physical link to a specific secure element.
* Once enabled a secure element will handle card emulation mode, i.e.
* starting a poll from a device which has a secure element enabled means
* we want to do SE based card emulation.
* @NFC_CMD_DISABLE_SE: Disable the physical link to a specific secure element.
* @NFC_CMD_FW_DOWNLOAD: Request to Load/flash firmware, or event to inform
* that some firmware was loaded
* @NFC_EVENT_SE_ADDED: Event emitted when a new secure element is discovered.
* This typically will be sent whenever a new NFC controller with either
* an embedded SE or an UICC one connected to it through SWP.
* @NFC_EVENT_SE_REMOVED: Event emitted when a secure element is removed from
* the system, as a consequence of e.g. an NFC controller being unplugged.
* @NFC_EVENT_SE_CONNECTIVITY: This event is emitted whenever a secure element
* is requesting connectivity access. For example a UICC SE may need to
* talk with a sleeping modem and will notify this need by sending this
* event. It is then up to userspace to decide if it will wake the modem
* up or not.
* @NFC_EVENT_SE_TRANSACTION: This event is sent when an application running on
* a specific SE notifies us about the end of a transaction. The parameter
* for this event is the application ID (AID).
* @NFC_CMD_GET_SE: Dump all discovered secure elements from an NFC controller.
* @NFC_CMD_SE_IO: Send/Receive APDUs to/from the selected secure element.
* @NFC_CMD_ACTIVATE_TARGET: Request NFC controller to reactivate target.
* @NFC_CMD_VENDOR: Vendor specific command, to be implemented directly
* from the driver in order to support hardware specific operations.
* @NFC_CMD_DEACTIVATE_TARGET: Request NFC controller to deactivate target.
*/
enum nfc_commands {
NFC_CMD_UNSPEC,
NFC_CMD_GET_DEVICE,
NFC_CMD_DEV_UP,
NFC_CMD_DEV_DOWN,
NFC_CMD_DEP_LINK_UP,
NFC_CMD_DEP_LINK_DOWN,
NFC_CMD_START_POLL,
NFC_CMD_STOP_POLL,
NFC_CMD_GET_TARGET,
NFC_EVENT_TARGETS_FOUND,
NFC_EVENT_DEVICE_ADDED,
NFC_EVENT_DEVICE_REMOVED,
NFC_EVENT_TARGET_LOST,
NFC_EVENT_TM_ACTIVATED,
NFC_EVENT_TM_DEACTIVATED,
NFC_CMD_LLC_GET_PARAMS,
NFC_CMD_LLC_SET_PARAMS,
NFC_CMD_ENABLE_SE,
NFC_CMD_DISABLE_SE,
NFC_CMD_LLC_SDREQ,
NFC_EVENT_LLC_SDRES,
NFC_CMD_FW_DOWNLOAD,
NFC_EVENT_SE_ADDED,
NFC_EVENT_SE_REMOVED,
NFC_EVENT_SE_CONNECTIVITY,
NFC_EVENT_SE_TRANSACTION,
NFC_CMD_GET_SE,
NFC_CMD_SE_IO,
NFC_CMD_ACTIVATE_TARGET,
NFC_CMD_VENDOR,
NFC_CMD_DEACTIVATE_TARGET,
/* private: internal use only */
__NFC_CMD_AFTER_LAST
};
#define NFC_CMD_MAX (__NFC_CMD_AFTER_LAST - 1)
/**
* enum nfc_attrs - supported nfc attributes
*
* @NFC_ATTR_UNSPEC: unspecified attribute
*
* @NFC_ATTR_DEVICE_INDEX: index of nfc device
* @NFC_ATTR_DEVICE_NAME: device name, max 8 chars
* @NFC_ATTR_PROTOCOLS: nfc protocols - bitwise or-ed combination from
* NFC_PROTO_*_MASK constants
* @NFC_ATTR_TARGET_INDEX: index of the nfc target
* @NFC_ATTR_TARGET_SENS_RES: NFC-A targets extra information such as NFCID
* @NFC_ATTR_TARGET_SEL_RES: NFC-A targets extra information (useful if the
* target is not NFC-Forum compliant)
* @NFC_ATTR_TARGET_NFCID1: NFC-A targets identifier, max 10 bytes
* @NFC_ATTR_TARGET_SENSB_RES: NFC-B targets extra information, max 12 bytes
* @NFC_ATTR_TARGET_SENSF_RES: NFC-F targets extra information, max 18 bytes
* @NFC_ATTR_COMM_MODE: Passive or active mode
* @NFC_ATTR_RF_MODE: Initiator or target
* @NFC_ATTR_IM_PROTOCOLS: Initiator mode protocols to poll for
* @NFC_ATTR_TM_PROTOCOLS: Target mode protocols to listen for
* @NFC_ATTR_LLC_PARAM_LTO: Link TimeOut parameter
* @NFC_ATTR_LLC_PARAM_RW: Receive Window size parameter
* @NFC_ATTR_LLC_PARAM_MIUX: MIU eXtension parameter
* @NFC_ATTR_SE: Available Secure Elements
* @NFC_ATTR_FIRMWARE_NAME: Free format firmware version
* @NFC_ATTR_SE_INDEX: Secure element index
* @NFC_ATTR_SE_TYPE: Secure element type (UICC or EMBEDDED)
* @NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS: Firmware download operation status
* @NFC_ATTR_APDU: Secure element APDU
* @NFC_ATTR_TARGET_ISO15693_DSFID: ISO 15693 Data Storage Format Identifier
* @NFC_ATTR_TARGET_ISO15693_UID: ISO 15693 Unique Identifier
* @NFC_ATTR_SE_PARAMS: Parameters data from an evt_transaction
* @NFC_ATTR_VENDOR_ID: NFC manufacturer unique ID, typically an OUI
* @NFC_ATTR_VENDOR_SUBCMD: Vendor specific sub command
* @NFC_ATTR_VENDOR_DATA: Vendor specific data, to be optionally passed
* to a vendor specific command implementation
*/
enum nfc_attrs {
NFC_ATTR_UNSPEC,
NFC_ATTR_DEVICE_INDEX,
NFC_ATTR_DEVICE_NAME,
NFC_ATTR_PROTOCOLS,
NFC_ATTR_TARGET_INDEX,
NFC_ATTR_TARGET_SENS_RES,
NFC_ATTR_TARGET_SEL_RES,
NFC_ATTR_TARGET_NFCID1,
NFC_ATTR_TARGET_SENSB_RES,
NFC_ATTR_TARGET_SENSF_RES,
NFC_ATTR_COMM_MODE,
NFC_ATTR_RF_MODE,
NFC_ATTR_DEVICE_POWERED,
NFC_ATTR_IM_PROTOCOLS,
NFC_ATTR_TM_PROTOCOLS,
NFC_ATTR_LLC_PARAM_LTO,
NFC_ATTR_LLC_PARAM_RW,
NFC_ATTR_LLC_PARAM_MIUX,
NFC_ATTR_SE,
NFC_ATTR_LLC_SDP,
NFC_ATTR_FIRMWARE_NAME,
NFC_ATTR_SE_INDEX,
NFC_ATTR_SE_TYPE,
NFC_ATTR_SE_AID,
NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS,
NFC_ATTR_SE_APDU,
NFC_ATTR_TARGET_ISO15693_DSFID,
NFC_ATTR_TARGET_ISO15693_UID,
NFC_ATTR_SE_PARAMS,
NFC_ATTR_VENDOR_ID,
NFC_ATTR_VENDOR_SUBCMD,
NFC_ATTR_VENDOR_DATA,
/* private: internal use only */
__NFC_ATTR_AFTER_LAST
};
#define NFC_ATTR_MAX (__NFC_ATTR_AFTER_LAST - 1)
enum nfc_sdp_attr {
NFC_SDP_ATTR_UNSPEC,
NFC_SDP_ATTR_URI,
NFC_SDP_ATTR_SAP,
/* private: internal use only */
__NFC_SDP_ATTR_AFTER_LAST
};
#define NFC_SDP_ATTR_MAX (__NFC_SDP_ATTR_AFTER_LAST - 1)
#define NFC_DEVICE_NAME_MAXSIZE 8
#define NFC_NFCID1_MAXSIZE 10
#define NFC_NFCID2_MAXSIZE 8
#define NFC_NFCID3_MAXSIZE 10
#define NFC_SENSB_RES_MAXSIZE 12
#define NFC_SENSF_RES_MAXSIZE 18
#define NFC_ATR_REQ_MAXSIZE 64
#define NFC_ATR_RES_MAXSIZE 64
#define NFC_ATR_REQ_GB_MAXSIZE 48
#define NFC_ATR_RES_GB_MAXSIZE 47
#define NFC_GB_MAXSIZE 48
#define NFC_FIRMWARE_NAME_MAXSIZE 32
#define NFC_ISO15693_UID_MAXSIZE 8
/* NFC protocols */
#define NFC_PROTO_JEWEL 1
#define NFC_PROTO_MIFARE 2
#define NFC_PROTO_FELICA 3
#define NFC_PROTO_ISO14443 4
#define NFC_PROTO_NFC_DEP 5
#define NFC_PROTO_ISO14443_B 6
#define NFC_PROTO_ISO15693 7
#define NFC_PROTO_MAX 8
/* NFC communication modes */
#define NFC_COMM_ACTIVE 0
#define NFC_COMM_PASSIVE 1
/* NFC RF modes */
#define NFC_RF_INITIATOR 0
#define NFC_RF_TARGET 1
#define NFC_RF_NONE 2
/* NFC protocols masks used in bitsets */
#define NFC_PROTO_JEWEL_MASK (1 << NFC_PROTO_JEWEL)
#define NFC_PROTO_MIFARE_MASK (1 << NFC_PROTO_MIFARE)
#define NFC_PROTO_FELICA_MASK (1 << NFC_PROTO_FELICA)
#define NFC_PROTO_ISO14443_MASK (1 << NFC_PROTO_ISO14443)
#define NFC_PROTO_NFC_DEP_MASK (1 << NFC_PROTO_NFC_DEP)
#define NFC_PROTO_ISO14443_B_MASK (1 << NFC_PROTO_ISO14443_B)
#define NFC_PROTO_ISO15693_MASK (1 << NFC_PROTO_ISO15693)
/* NFC Secure Elements */
#define NFC_SE_UICC 0x1
#define NFC_SE_EMBEDDED 0x2
#define NFC_SE_DISABLED 0x0
#define NFC_SE_ENABLED 0x1
struct sockaddr_nfc {
sa_family_t sa_family;
__u32 dev_idx;
__u32 target_idx;
__u32 nfc_protocol;
};
#define NFC_LLCP_MAX_SERVICE_NAME 63
struct sockaddr_nfc_llcp {
sa_family_t sa_family;
__u32 dev_idx;
__u32 target_idx;
__u32 nfc_protocol;
__u8 dsap; /* Destination SAP, if known */
__u8 ssap; /* Source SAP to be bound to */
char service_name[NFC_LLCP_MAX_SERVICE_NAME]; /* Service name URI */;
size_t service_name_len;
};
/* NFC socket protocols */
#define NFC_SOCKPROTO_RAW 0
#define NFC_SOCKPROTO_LLCP 1
#define NFC_SOCKPROTO_MAX 2
#define NFC_HEADER_SIZE 1
/**
* Pseudo-header info for raw socket packets
* First byte is the adapter index
* Second byte contains flags
* - 0x01 - Direction (0=RX, 1=TX)
* - 0x02-0x04 - Payload type (000=LLCP, 001=NCI, 010=HCI, 011=Digital,
* 100=Proprietary)
* - 0x05-0x80 - Reserved
**/
#define NFC_RAW_HEADER_SIZE 2
#define NFC_DIRECTION_RX 0x00
#define NFC_DIRECTION_TX 0x01
#define RAW_PAYLOAD_LLCP 0
#define RAW_PAYLOAD_NCI 1
#define RAW_PAYLOAD_HCI 2
#define RAW_PAYLOAD_DIGITAL 3
#define RAW_PAYLOAD_PROPRIETARY 4
/* socket option names */
#define NFC_LLCP_RW 0
#define NFC_LLCP_MIUX 1
#define NFC_LLCP_REMOTE_MIU 2
#define NFC_LLCP_REMOTE_LTO 3
#define NFC_LLCP_REMOTE_RW 4
#endif /*__LINUX_NFC_H */
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