// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for NXP PN533 NFC Chip - core functions * * Copyright (C) 2011 Instituto Nokia de Tecnologia * Copyright (C) 2012-2013 Tieto Poland */ #include <linux/device.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/nfc.h> #include <linux/netdevice.h> #include <net/nfc/nfc.h> #include "pn533.h" #define VERSION … /* How much time we spend listening for initiators */ #define PN533_LISTEN_TIME … /* Delay between each poll frame (ms) */ #define PN533_POLL_INTERVAL … /* structs for pn533 commands */ /* PN533_CMD_GET_FIRMWARE_VERSION */ struct pn533_fw_version { … }; /* PN533_CMD_RF_CONFIGURATION */ #define PN533_CFGITEM_RF_FIELD … #define PN533_CFGITEM_TIMING … #define PN533_CFGITEM_MAX_RETRIES … #define PN533_CFGITEM_PASORI … #define PN533_CFGITEM_RF_FIELD_AUTO_RFCA … #define PN533_CFGITEM_RF_FIELD_ON … #define PN533_CFGITEM_RF_FIELD_OFF … #define PN533_CONFIG_TIMING_102 … #define PN533_CONFIG_TIMING_204 … #define PN533_CONFIG_TIMING_409 … #define PN533_CONFIG_TIMING_819 … #define PN533_CONFIG_MAX_RETRIES_NO_RETRY … #define PN533_CONFIG_MAX_RETRIES_ENDLESS … struct pn533_config_max_retries { … } __packed; struct pn533_config_timing { … } __packed; /* PN533_CMD_IN_LIST_PASSIVE_TARGET */ /* felica commands opcode */ #define PN533_FELICA_OPC_SENSF_REQ … #define PN533_FELICA_OPC_SENSF_RES … /* felica SENSF_REQ parameters */ #define PN533_FELICA_SENSF_SC_ALL … #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE … #define PN533_FELICA_SENSF_RC_SYSTEM_CODE … #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL … /* type B initiator_data values */ #define PN533_TYPE_B_AFI_ALL_FAMILIES … #define PN533_TYPE_B_POLL_METHOD_TIMESLOT … #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC … pn533_cmd_poll_initdata; struct pn533_poll_modulations { … }; static const struct pn533_poll_modulations poll_mod[] = …; /* PN533_CMD_IN_ATR */ struct pn533_cmd_activate_response { … } __packed; struct pn533_cmd_jump_dep_response { … } __packed; struct pn532_autopoll_resp { … }; /* PN532_CMD_IN_AUTOPOLL */ #define PN532_AUTOPOLL_POLLNR_INFINITE … #define PN532_AUTOPOLL_PERIOD … #define PN532_AUTOPOLL_TYPE_GENERIC_106 … #define PN532_AUTOPOLL_TYPE_GENERIC_212 … #define PN532_AUTOPOLL_TYPE_GENERIC_424 … #define PN532_AUTOPOLL_TYPE_JEWEL … #define PN532_AUTOPOLL_TYPE_MIFARE … #define PN532_AUTOPOLL_TYPE_FELICA212 … #define PN532_AUTOPOLL_TYPE_FELICA424 … #define PN532_AUTOPOLL_TYPE_ISOA … #define PN532_AUTOPOLL_TYPE_ISOB … #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106 … #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212 … #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424 … #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106 … #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_212 … #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_424 … /* PN533_TG_INIT_AS_TARGET */ #define PN533_INIT_TARGET_PASSIVE … #define PN533_INIT_TARGET_DEP … #define PN533_INIT_TARGET_RESP_FRAME_MASK … #define PN533_INIT_TARGET_RESP_ACTIVE … #define PN533_INIT_TARGET_RESP_DEP … /* The rule: value(high byte) + value(low byte) + checksum = 0 */ static inline u8 pn533_ext_checksum(u16 value) { … } /* The rule: value + checksum = 0 */ static inline u8 pn533_std_checksum(u8 value) { … } /* The rule: sum(data elements) + checksum = 0 */ static u8 pn533_std_data_checksum(u8 *data, int datalen) { … } static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code) { … } static void pn533_std_tx_frame_finish(void *_frame) { … } static void pn533_std_tx_update_payload_len(void *_frame, int len) { … } static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev) { … } bool pn533_rx_frame_is_ack(void *_frame) { … } EXPORT_SYMBOL_GPL(…); static inline int pn533_std_rx_frame_size(void *frame) { … } static u8 pn533_std_get_cmd_code(void *frame) { … } bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame) { … } EXPORT_SYMBOL_GPL(…); static struct pn533_frame_ops pn533_std_frame_ops = …; static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code, struct sk_buff *skb) { … } static int pn533_send_async_complete(struct pn533 *dev) { … } static int __pn533_send_async(struct pn533 *dev, u8 cmd_code, struct sk_buff *req, pn533_send_async_complete_t complete_cb, void *complete_cb_context) { … } static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code, struct sk_buff *req, pn533_send_async_complete_t complete_cb, void *complete_cb_context) { … } static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code, struct sk_buff *req, pn533_send_async_complete_t complete_cb, void *complete_cb_context) { … } /* * pn533_send_cmd_direct_async * * The function sends a priority cmd directly to the chip omitting the cmd * queue. It's intended to be used by chaining mechanism of received responses * where the host has to request every single chunk of data before scheduling * next cmd from the queue. */ static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code, struct sk_buff *req, pn533_send_async_complete_t complete_cb, void *complete_cb_context) { … } static void pn533_wq_cmd_complete(struct work_struct *work) { … } static void pn533_wq_cmd(struct work_struct *work) { … } struct pn533_sync_cmd_response { … }; static int pn533_send_sync_complete(struct pn533 *dev, void *_arg, struct sk_buff *resp) { … } /* pn533_send_cmd_sync * * Please note the req parameter is freed inside the function to * limit a number of return value interpretations by the caller. * * 1. negative in case of error during TX path -> req should be freed * * 2. negative in case of error during RX path -> req should not be freed * as it's been already freed at the beginning of RX path by * async_complete_cb. * * 3. valid pointer in case of successful RX path * * A caller has to check a return value with IS_ERR macro. If the test pass, * the returned pointer is valid. * */ static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code, struct sk_buff *req) { … } static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size) { … } struct pn533_target_type_a { … } __packed; #define PN533_TYPE_A_SENS_RES_NFCID1(x) … #define PN533_TYPE_A_SENS_RES_SSD(x) … #define PN533_TYPE_A_SENS_RES_PLATCONF(x) … #define PN533_TYPE_A_SENS_RES_SSD_JEWEL … #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL … #define PN533_TYPE_A_SEL_PROT(x) … #define PN533_TYPE_A_SEL_CASCADE(x) … #define PN533_TYPE_A_SEL_PROT_MIFARE … #define PN533_TYPE_A_SEL_PROT_ISO14443 … #define PN533_TYPE_A_SEL_PROT_DEP … #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP … static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, int target_data_len) { … } static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, int tgt_data_len) { … } struct pn533_target_felica { … } __packed; #define PN533_FELICA_SENSF_NFCID2_DEP_B1 … #define PN533_FELICA_SENSF_NFCID2_DEP_B2 … static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, int target_data_len) { … } static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, int tgt_data_len) { … } struct pn533_target_jewel { … } __packed; static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel, int target_data_len) { … } static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data, int tgt_data_len) { … } struct pn533_type_b_prot_info { … } __packed; #define PN533_TYPE_B_PROT_FCSI(x) … #define PN533_TYPE_B_PROT_TYPE(x) … #define PN533_TYPE_B_PROT_TYPE_RFU_MASK … struct pn533_type_b_sens_res { … } __packed; #define PN533_TYPE_B_OPC_SENSB_RES … struct pn533_target_type_b { … } __packed; static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b, int target_data_len) { … } static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data, int tgt_data_len) { … } static void pn533_poll_reset_mod_list(struct pn533 *dev); static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata, int tgdata_len) { … } static inline void pn533_poll_next_mod(struct pn533 *dev) { … } static void pn533_poll_reset_mod_list(struct pn533 *dev) { … } static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index) { … } static void pn533_poll_create_mod_list(struct pn533 *dev, u32 im_protocols, u32 tm_protocols) { … } static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp) { … } static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev) { … } static void pn533_wq_tm_mi_recv(struct work_struct *work); static struct sk_buff *pn533_build_response(struct pn533 *dev); static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } static void pn533_wq_tm_mi_recv(struct work_struct *work) { … } static int pn533_tm_send_complete(struct pn533 *dev, void *arg, struct sk_buff *resp); static void pn533_wq_tm_mi_send(struct work_struct *work) { … } static void pn533_wq_tg_get_data(struct work_struct *work) { … } #define ATR_REQ_GB_OFFSET … static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp) { … } static void pn533_listen_mode_timer(struct timer_list *t) { … } static int pn533_rf_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } static void pn533_wq_rf(struct work_struct *work) { … } static int pn533_poll_dep_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } #define PASSIVE_DATA_LEN … static int pn533_poll_dep(struct nfc_dev *nfc_dev) { … } static int pn533_autopoll_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } static int pn533_poll_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev, struct pn533_poll_modulations *mod) { … } static int pn533_send_poll_frame(struct pn533 *dev) { … } static void pn533_wq_poll(struct work_struct *work) { … } static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 im_protocols, u32 tm_protocols) { … } static void pn533_stop_poll(struct nfc_dev *nfc_dev) { … } static int pn533_activate_target_nfcdep(struct pn533 *dev) { … } static int pn533_activate_target(struct nfc_dev *nfc_dev, struct nfc_target *target, u32 protocol) { … } static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } static void pn533_deactivate_target(struct nfc_dev *nfc_dev, struct nfc_target *target, u8 mode) { … } static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf); static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, u8 comm_mode, u8 *gb, size_t gb_len) { … } static int pn533_dep_link_down(struct nfc_dev *nfc_dev) { … } struct pn533_data_exchange_arg { … }; static struct sk_buff *pn533_build_response(struct pn533 *dev) { … } static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, struct sk_buff *resp) { … } /* * Receive an incoming pn533 frame. skb contains only header and payload. * If skb == NULL, it is a notification that the link below is dead. */ void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status) { … } EXPORT_SYMBOL(…); /* Split the Tx skb into small chunks */ static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb) { … } static int pn533_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, struct sk_buff *skb, data_exchange_cb_t cb, void *cb_context) { … } static int pn533_tm_send_complete(struct pn533 *dev, void *arg, struct sk_buff *resp) { … } static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) { … } static void pn533_wq_mi_recv(struct work_struct *work) { … } static void pn533_wq_mi_send(struct work_struct *work) { … } static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, u8 cfgdata_len) { … } static int pn533_get_firmware_version(struct pn533 *dev, struct pn533_fw_version *fv) { … } static int pn533_pasori_fw_reset(struct pn533 *dev) { … } static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf) { … } static int pn532_sam_configuration(struct nfc_dev *nfc_dev) { … } static int pn533_dev_up(struct nfc_dev *nfc_dev) { … } static int pn533_dev_down(struct nfc_dev *nfc_dev) { … } static const struct nfc_ops pn533_nfc_ops = …; static int pn533_setup(struct pn533 *dev) { … } int pn533_finalize_setup(struct pn533 *dev) { … } EXPORT_SYMBOL_GPL(…); struct pn533 *pn53x_common_init(u32 device_type, enum pn533_protocol_type protocol_type, void *phy, const struct pn533_phy_ops *phy_ops, struct pn533_frame_ops *fops, struct device *dev) { … } EXPORT_SYMBOL_GPL(…); void pn53x_common_clean(struct pn533 *priv) { … } EXPORT_SYMBOL_GPL(…); int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, struct device *parent) { … } EXPORT_SYMBOL_GPL(…); int pn53x_register_nfc(struct pn533 *priv, u32 protocols, struct device *parent) { … } EXPORT_SYMBOL_GPL(…); void pn53x_unregister_nfc(struct pn533 *priv) { … } EXPORT_SYMBOL_GPL(…); MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_VERSION(…); MODULE_LICENSE(…) …;
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