Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266/* SPDX-License-Identifier: GPL-2.0-only *//* * NFC Digital Protocol stack * Copyright (c) 2013, Intel Corporation. */
#ifndef __NFC_DIGITAL_H#define __NFC_DIGITAL_H
#include <linux/skbuff.h>#include <net/nfc/nfc.h>
/** * Configuration types for in_configure_hw and tg_configure_hw. */enum { NFC_DIGITAL_CONFIG_RF_TECH = 0, NFC_DIGITAL_CONFIG_FRAMING,};
/** * RF technology values passed as param argument to in_configure_hw and * tg_configure_hw for NFC_DIGITAL_CONFIG_RF_TECH configuration type. */enum { NFC_DIGITAL_RF_TECH_106A = 0, NFC_DIGITAL_RF_TECH_212F, NFC_DIGITAL_RF_TECH_424F, NFC_DIGITAL_RF_TECH_ISO15693, NFC_DIGITAL_RF_TECH_106B,
NFC_DIGITAL_RF_TECH_LAST,};
/** * Framing configuration passed as param argument to in_configure_hw and * tg_configure_hw for NFC_DIGITAL_CONFIG_FRAMING configuration type. */enum { NFC_DIGITAL_FRAMING_NFCA_SHORT = 0, NFC_DIGITAL_FRAMING_NFCA_STANDARD, NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A, NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE,
NFC_DIGITAL_FRAMING_NFCA_T1T, NFC_DIGITAL_FRAMING_NFCA_T2T, NFC_DIGITAL_FRAMING_NFCA_T4T, NFC_DIGITAL_FRAMING_NFCA_NFC_DEP,
NFC_DIGITAL_FRAMING_NFCF, NFC_DIGITAL_FRAMING_NFCF_T3T, NFC_DIGITAL_FRAMING_NFCF_NFC_DEP, NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED,
NFC_DIGITAL_FRAMING_ISO15693_INVENTORY, NFC_DIGITAL_FRAMING_ISO15693_T5T,
NFC_DIGITAL_FRAMING_NFCB, NFC_DIGITAL_FRAMING_NFCB_T4T,
NFC_DIGITAL_FRAMING_LAST,};
#define DIGITAL_MDAA_NFCID1_SIZE 3
struct digital_tg_mdaa_params { u16 sens_res; u8 nfcid1[DIGITAL_MDAA_NFCID1_SIZE]; u8 sel_res;
u8 nfcid2[NFC_NFCID2_MAXSIZE]; u16 sc;};
struct nfc_digital_dev;
/** * nfc_digital_cmd_complete_t - Definition of command result callback * * @ddev: nfc_digital_device ref * @arg: user data * @resp: response data * * resp pointer can be an error code and will be checked with IS_ERR() macro. * The callback is responsible for freeing resp sk_buff. */typedef void (*nfc_digital_cmd_complete_t)(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp);
/** * Device side NFC Digital operations * * Initiator mode: * @in_configure_hw: Hardware configuration for RF technology and communication * framing in initiator mode. This is a synchronous function. * @in_send_cmd: Initiator mode data exchange using RF technology and framing * previously set with in_configure_hw. The peer response is returned * through callback cb. If an io error occurs or the peer didn't reply * within the specified timeout (ms), the error code is passed back through * the resp pointer. This is an asynchronous function. * * Target mode: Only NFC-DEP protocol is supported in target mode. * @tg_configure_hw: Hardware configuration for RF technology and communication * framing in target mode. This is a synchronous function. * @tg_send_cmd: Target mode data exchange using RF technology and framing * previously set with tg_configure_hw. The peer next command is returned * through callback cb. If an io error occurs or the peer didn't reply * within the specified timeout (ms), the error code is passed back through * the resp pointer. This is an asynchronous function. * @tg_listen: Put the device in listen mode waiting for data from the peer * device. This is an asynchronous function. * @tg_listen_mdaa: If supported, put the device in automatic listen mode with * mode detection and automatic anti-collision. In this mode, the device * automatically detects the RF technology and executes the anti-collision * detection using the command responses specified in mdaa_params. The * mdaa_params structure contains SENS_RES, NFCID1, and SEL_RES for 106A RF * tech. NFCID2 and system code (sc) for 212F and 424F. The driver returns * the NFC-DEP ATR_REQ command through cb. The digital stack deducts the RF * tech by analyzing the SoD of the frame containing the ATR_REQ command. * This is an asynchronous function. * @tg_listen_md: If supported, put the device in automatic listen mode with * mode detection but without automatic anti-collision. In this mode, the * device automatically detects the RF technology. What the actual * RF technology is can be retrieved by calling @tg_get_rf_tech. * The digital stack will then perform the appropriate anti-collision * sequence. This is an asynchronous function. * @tg_get_rf_tech: Required when @tg_listen_md is supported, unused otherwise. * Return the RF Technology that was detected by the @tg_listen_md call. * This is a synchronous function. * * @switch_rf: Turns device radio on or off. The stack does not call explicitly * switch_rf to turn the radio on. A call to in|tg_configure_hw must turn * the device radio on. * @abort_cmd: Discard the last sent command. * * Notes: Asynchronous functions have a timeout parameter. It is the driver * responsibility to call the digital stack back through the * nfc_digital_cmd_complete_t callback when no RF respsonse has been * received within the specified time (in milliseconds). In that case the * driver must set the resp sk_buff to ERR_PTR(-ETIMEDOUT). * Since the digital stack serializes commands to be sent, it's mandatory * for the driver to handle the timeout correctly. Otherwise the stack * would not be able to send new commands, waiting for the reply of the * current one. */struct nfc_digital_ops { int (*in_configure_hw)(struct nfc_digital_dev *ddev, int type, int param); int (*in_send_cmd)(struct nfc_digital_dev *ddev, struct sk_buff *skb, u16 timeout, nfc_digital_cmd_complete_t cb, void *arg);
int (*tg_configure_hw)(struct nfc_digital_dev *ddev, int type, int param); int (*tg_send_cmd)(struct nfc_digital_dev *ddev, struct sk_buff *skb, u16 timeout, nfc_digital_cmd_complete_t cb, void *arg); int (*tg_listen)(struct nfc_digital_dev *ddev, u16 timeout, nfc_digital_cmd_complete_t cb, void *arg); int (*tg_listen_mdaa)(struct nfc_digital_dev *ddev, struct digital_tg_mdaa_params *mdaa_params, u16 timeout, nfc_digital_cmd_complete_t cb, void *arg); int (*tg_listen_md)(struct nfc_digital_dev *ddev, u16 timeout, nfc_digital_cmd_complete_t cb, void *arg); int (*tg_get_rf_tech)(struct nfc_digital_dev *ddev, u8 *rf_tech);
int (*switch_rf)(struct nfc_digital_dev *ddev, bool on); void (*abort_cmd)(struct nfc_digital_dev *ddev);};
#define NFC_DIGITAL_POLL_MODE_COUNT_MAX 6 /* 106A, 212F, and 424F in & tg */
typedef int (*digital_poll_t)(struct nfc_digital_dev *ddev, u8 rf_tech);
struct digital_poll_tech { u8 rf_tech; digital_poll_t poll_func;};
/** * Driver capabilities - bit mask made of the following values * * @NFC_DIGITAL_DRV_CAPS_IN_CRC: The driver handles CRC calculation in initiator * mode. * @NFC_DIGITAL_DRV_CAPS_TG_CRC: The driver handles CRC calculation in target * mode. */#define NFC_DIGITAL_DRV_CAPS_IN_CRC 0x0001#define NFC_DIGITAL_DRV_CAPS_TG_CRC 0x0002
struct nfc_digital_dev { struct nfc_dev *nfc_dev; const struct nfc_digital_ops *ops;
u32 protocols;
int tx_headroom; int tx_tailroom;
u32 driver_capabilities; void *driver_data;
struct digital_poll_tech poll_techs[NFC_DIGITAL_POLL_MODE_COUNT_MAX]; u8 poll_tech_count; u8 poll_tech_index; struct mutex poll_lock;
struct work_struct cmd_work; struct work_struct cmd_complete_work; struct list_head cmd_queue; struct mutex cmd_lock;
struct delayed_work poll_work;
u8 curr_protocol; u8 curr_rf_tech; u8 curr_nfc_dep_pni; u8 did; u16 dep_rwt;
u8 local_payload_max; u8 remote_payload_max;
struct sk_buff *chaining_skb; struct digital_data_exch *data_exch;
int atn_count; int nack_count;
struct sk_buff *saved_skb;
u16 target_fsc;
int (*skb_check_crc)(struct sk_buff *skb); void (*skb_add_crc)(struct sk_buff *skb);};
struct nfc_digital_dev *nfc_digital_allocate_device(const struct nfc_digital_ops *ops, __u32 supported_protocols, __u32 driver_capabilities, int tx_headroom, int tx_tailroom);void nfc_digital_free_device(struct nfc_digital_dev *ndev);int nfc_digital_register_device(struct nfc_digital_dev *ndev);void nfc_digital_unregister_device(struct nfc_digital_dev *ndev);
static inline void nfc_digital_set_parent_dev(struct nfc_digital_dev *ndev, struct device *dev){ nfc_set_parent_dev(ndev->nfc_dev, dev);}
static inline void nfc_digital_set_drvdata(struct nfc_digital_dev *dev, void *data){ dev->driver_data = data;}
static inline void *nfc_digital_get_drvdata(struct nfc_digital_dev *dev){ return dev->driver_data;}
#endif /* __NFC_DIGITAL_H */