2857 lines
63 KiB
C
2857 lines
63 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for NXP PN533 NFC Chip - core functions
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*
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* Copyright (C) 2011 Instituto Nokia de Tecnologia
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* Copyright (C) 2012-2013 Tieto Poland
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*/
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/nfc.h>
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#include <linux/netdevice.h>
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#include <net/nfc/nfc.h>
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#include "pn533.h"
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#define VERSION "0.3"
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/* How much time we spend listening for initiators */
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#define PN533_LISTEN_TIME 2
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/* Delay between each poll frame (ms) */
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#define PN533_POLL_INTERVAL 10
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/* structs for pn533 commands */
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/* PN533_CMD_GET_FIRMWARE_VERSION */
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struct pn533_fw_version {
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u8 ic;
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u8 ver;
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u8 rev;
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u8 support;
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};
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/* PN533_CMD_RF_CONFIGURATION */
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#define PN533_CFGITEM_RF_FIELD 0x01
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#define PN533_CFGITEM_TIMING 0x02
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#define PN533_CFGITEM_MAX_RETRIES 0x05
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#define PN533_CFGITEM_PASORI 0x82
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#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
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#define PN533_CFGITEM_RF_FIELD_ON 0x1
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#define PN533_CFGITEM_RF_FIELD_OFF 0x0
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#define PN533_CONFIG_TIMING_102 0xb
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#define PN533_CONFIG_TIMING_204 0xc
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#define PN533_CONFIG_TIMING_409 0xd
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#define PN533_CONFIG_TIMING_819 0xe
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#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
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#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
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struct pn533_config_max_retries {
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u8 mx_rty_atr;
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u8 mx_rty_psl;
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u8 mx_rty_passive_act;
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} __packed;
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struct pn533_config_timing {
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u8 rfu;
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u8 atr_res_timeout;
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u8 dep_timeout;
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} __packed;
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/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
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/* felica commands opcode */
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#define PN533_FELICA_OPC_SENSF_REQ 0
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#define PN533_FELICA_OPC_SENSF_RES 1
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/* felica SENSF_REQ parameters */
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#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
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#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
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#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
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#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
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/* type B initiator_data values */
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#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
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#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
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#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
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union pn533_cmd_poll_initdata {
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struct {
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u8 afi;
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u8 polling_method;
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} __packed type_b;
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struct {
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u8 opcode;
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__be16 sc;
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u8 rc;
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u8 tsn;
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} __packed felica;
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};
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struct pn533_poll_modulations {
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struct {
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u8 maxtg;
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u8 brty;
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union pn533_cmd_poll_initdata initiator_data;
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} __packed data;
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u8 len;
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};
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static const struct pn533_poll_modulations poll_mod[] = {
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[PN533_POLL_MOD_106KBPS_A] = {
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.data = {
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.maxtg = 1,
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.brty = 0,
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},
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.len = 2,
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},
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[PN533_POLL_MOD_212KBPS_FELICA] = {
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.data = {
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.maxtg = 1,
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.brty = 1,
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.initiator_data.felica = {
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.opcode = PN533_FELICA_OPC_SENSF_REQ,
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.sc = PN533_FELICA_SENSF_SC_ALL,
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.rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
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.tsn = 0x03,
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},
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},
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.len = 7,
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},
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[PN533_POLL_MOD_424KBPS_FELICA] = {
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.data = {
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.maxtg = 1,
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.brty = 2,
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.initiator_data.felica = {
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.opcode = PN533_FELICA_OPC_SENSF_REQ,
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.sc = PN533_FELICA_SENSF_SC_ALL,
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.rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
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.tsn = 0x03,
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},
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},
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.len = 7,
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},
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[PN533_POLL_MOD_106KBPS_JEWEL] = {
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.data = {
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.maxtg = 1,
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.brty = 4,
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},
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.len = 2,
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},
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[PN533_POLL_MOD_847KBPS_B] = {
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.data = {
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.maxtg = 1,
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.brty = 8,
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.initiator_data.type_b = {
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.afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
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.polling_method =
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PN533_TYPE_B_POLL_METHOD_TIMESLOT,
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},
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},
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.len = 3,
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},
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[PN533_LISTEN_MOD] = {
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.len = 0,
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},
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};
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/* PN533_CMD_IN_ATR */
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struct pn533_cmd_activate_response {
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u8 status;
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u8 nfcid3t[10];
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u8 didt;
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u8 bst;
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u8 brt;
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u8 to;
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u8 ppt;
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/* optional */
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u8 gt[];
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} __packed;
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struct pn533_cmd_jump_dep_response {
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u8 status;
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u8 tg;
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u8 nfcid3t[10];
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u8 didt;
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u8 bst;
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u8 brt;
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u8 to;
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u8 ppt;
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/* optional */
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u8 gt[];
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} __packed;
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struct pn532_autopoll_resp {
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u8 type;
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u8 ln;
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u8 tg;
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u8 tgdata[];
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};
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/* PN532_CMD_IN_AUTOPOLL */
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#define PN532_AUTOPOLL_POLLNR_INFINITE 0xff
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#define PN532_AUTOPOLL_PERIOD 0x03 /* in units of 150 ms */
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#define PN532_AUTOPOLL_TYPE_GENERIC_106 0x00
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#define PN532_AUTOPOLL_TYPE_GENERIC_212 0x01
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#define PN532_AUTOPOLL_TYPE_GENERIC_424 0x02
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#define PN532_AUTOPOLL_TYPE_JEWEL 0x04
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#define PN532_AUTOPOLL_TYPE_MIFARE 0x10
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#define PN532_AUTOPOLL_TYPE_FELICA212 0x11
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#define PN532_AUTOPOLL_TYPE_FELICA424 0x12
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#define PN532_AUTOPOLL_TYPE_ISOA 0x20
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#define PN532_AUTOPOLL_TYPE_ISOB 0x23
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#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106 0x40
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#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212 0x41
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#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424 0x42
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#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106 0x80
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#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_212 0x81
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#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_424 0x82
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/* PN533_TG_INIT_AS_TARGET */
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#define PN533_INIT_TARGET_PASSIVE 0x1
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#define PN533_INIT_TARGET_DEP 0x2
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#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
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#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
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#define PN533_INIT_TARGET_RESP_DEP 0x4
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/* The rule: value(high byte) + value(low byte) + checksum = 0 */
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static inline u8 pn533_ext_checksum(u16 value)
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{
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return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
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}
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/* The rule: value + checksum = 0 */
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static inline u8 pn533_std_checksum(u8 value)
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{
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return ~value + 1;
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}
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/* The rule: sum(data elements) + checksum = 0 */
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static u8 pn533_std_data_checksum(u8 *data, int datalen)
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{
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u8 sum = 0;
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int i;
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for (i = 0; i < datalen; i++)
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sum += data[i];
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return pn533_std_checksum(sum);
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}
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static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
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{
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struct pn533_std_frame *frame = _frame;
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frame->preamble = 0;
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frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
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PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
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PN533_FRAME_CMD(frame) = cmd_code;
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frame->datalen = 2;
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}
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static void pn533_std_tx_frame_finish(void *_frame)
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{
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struct pn533_std_frame *frame = _frame;
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frame->datalen_checksum = pn533_std_checksum(frame->datalen);
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PN533_STD_FRAME_CHECKSUM(frame) =
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pn533_std_data_checksum(frame->data, frame->datalen);
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PN533_STD_FRAME_POSTAMBLE(frame) = 0;
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}
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static void pn533_std_tx_update_payload_len(void *_frame, int len)
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{
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struct pn533_std_frame *frame = _frame;
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frame->datalen += len;
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}
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static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
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{
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u8 checksum;
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struct pn533_std_frame *stdf = _frame;
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if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
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return false;
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if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
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/* Standard frame code */
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dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
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checksum = pn533_std_checksum(stdf->datalen);
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if (checksum != stdf->datalen_checksum)
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return false;
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checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
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if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
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return false;
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} else {
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/* Extended */
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struct pn533_ext_frame *eif = _frame;
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dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
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checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
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if (checksum != eif->datalen_checksum)
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return false;
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/* check data checksum */
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||
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checksum = pn533_std_data_checksum(eif->data,
|
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be16_to_cpu(eif->datalen));
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if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
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return false;
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}
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return true;
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}
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bool pn533_rx_frame_is_ack(void *_frame)
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{
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struct pn533_std_frame *frame = _frame;
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if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
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return false;
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if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
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return false;
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return true;
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}
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EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
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static inline int pn533_std_rx_frame_size(void *frame)
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{
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struct pn533_std_frame *f = frame;
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/* check for Extended Information frame */
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if (PN533_STD_IS_EXTENDED(f)) {
|
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struct pn533_ext_frame *eif = frame;
|
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|
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||
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return sizeof(struct pn533_ext_frame)
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+ be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
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}
|
||
|
|
||
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return sizeof(struct pn533_std_frame) + f->datalen +
|
||
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PN533_STD_FRAME_TAIL_LEN;
|
||
|
}
|
||
|
|
||
|
static u8 pn533_std_get_cmd_code(void *frame)
|
||
|
{
|
||
|
struct pn533_std_frame *f = frame;
|
||
|
struct pn533_ext_frame *eif = frame;
|
||
|
|
||
|
if (PN533_STD_IS_EXTENDED(f))
|
||
|
return PN533_FRAME_CMD(eif);
|
||
|
else
|
||
|
return PN533_FRAME_CMD(f);
|
||
|
}
|
||
|
|
||
|
bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
|
||
|
{
|
||
|
return (dev->ops->get_cmd_code(frame) ==
|
||
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PN533_CMD_RESPONSE(dev->cmd->code));
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response);
|
||
|
|
||
|
|
||
|
static struct pn533_frame_ops pn533_std_frame_ops = {
|
||
|
.tx_frame_init = pn533_std_tx_frame_init,
|
||
|
.tx_frame_finish = pn533_std_tx_frame_finish,
|
||
|
.tx_update_payload_len = pn533_std_tx_update_payload_len,
|
||
|
.tx_header_len = PN533_STD_FRAME_HEADER_LEN,
|
||
|
.tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
|
||
|
|
||
|
.rx_is_frame_valid = pn533_std_rx_frame_is_valid,
|
||
|
.rx_frame_size = pn533_std_rx_frame_size,
|
||
|
.rx_header_len = PN533_STD_FRAME_HEADER_LEN,
|
||
|
.rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
|
||
|
|
||
|
.max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
|
||
|
.get_cmd_code = pn533_std_get_cmd_code,
|
||
|
};
|
||
|
|
||
|
static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
|
||
|
struct sk_buff *skb)
|
||
|
{
|
||
|
/* payload is already there, just update datalen */
|
||
|
int payload_len = skb->len;
|
||
|
struct pn533_frame_ops *ops = dev->ops;
|
||
|
|
||
|
|
||
|
skb_push(skb, ops->tx_header_len);
|
||
|
skb_put(skb, ops->tx_tail_len);
|
||
|
|
||
|
ops->tx_frame_init(skb->data, cmd_code);
|
||
|
ops->tx_update_payload_len(skb->data, payload_len);
|
||
|
ops->tx_frame_finish(skb->data);
|
||
|
}
|
||
|
|
||
|
static int pn533_send_async_complete(struct pn533 *dev)
|
||
|
{
|
||
|
struct pn533_cmd *cmd = dev->cmd;
|
||
|
struct sk_buff *resp;
|
||
|
int status, rc = 0;
|
||
|
|
||
|
if (!cmd) {
|
||
|
dev_dbg(dev->dev, "%s: cmd not set\n", __func__);
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
dev_kfree_skb(cmd->req);
|
||
|
|
||
|
status = cmd->status;
|
||
|
resp = cmd->resp;
|
||
|
|
||
|
if (status < 0) {
|
||
|
rc = cmd->complete_cb(dev, cmd->complete_cb_context,
|
||
|
ERR_PTR(status));
|
||
|
dev_kfree_skb(resp);
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
/* when no response is set we got interrupted */
|
||
|
if (!resp)
|
||
|
resp = ERR_PTR(-EINTR);
|
||
|
|
||
|
if (!IS_ERR(resp)) {
|
||
|
skb_pull(resp, dev->ops->rx_header_len);
|
||
|
skb_trim(resp, resp->len - dev->ops->rx_tail_len);
|
||
|
}
|
||
|
|
||
|
rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
|
||
|
|
||
|
done:
|
||
|
kfree(cmd);
|
||
|
dev->cmd = NULL;
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
struct pn533_cmd *cmd;
|
||
|
int rc = 0;
|
||
|
|
||
|
dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code);
|
||
|
|
||
|
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
|
||
|
if (!cmd)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
cmd->code = cmd_code;
|
||
|
cmd->req = req;
|
||
|
cmd->complete_cb = complete_cb;
|
||
|
cmd->complete_cb_context = complete_cb_context;
|
||
|
|
||
|
pn533_build_cmd_frame(dev, cmd_code, req);
|
||
|
|
||
|
mutex_lock(&dev->cmd_lock);
|
||
|
|
||
|
if (!dev->cmd_pending) {
|
||
|
dev->cmd = cmd;
|
||
|
rc = dev->phy_ops->send_frame(dev, req);
|
||
|
if (rc) {
|
||
|
dev->cmd = NULL;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
dev->cmd_pending = 1;
|
||
|
goto unlock;
|
||
|
}
|
||
|
|
||
|
dev_dbg(dev->dev, "%s Queueing command 0x%x\n",
|
||
|
__func__, cmd_code);
|
||
|
|
||
|
INIT_LIST_HEAD(&cmd->queue);
|
||
|
list_add_tail(&cmd->queue, &dev->cmd_queue);
|
||
|
|
||
|
goto unlock;
|
||
|
|
||
|
error:
|
||
|
kfree(cmd);
|
||
|
unlock:
|
||
|
mutex_unlock(&dev->cmd_lock);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
return __pn533_send_async(dev, cmd_code, req, complete_cb,
|
||
|
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)
|
||
|
{
|
||
|
return __pn533_send_async(dev, cmd_code, req, complete_cb,
|
||
|
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)
|
||
|
{
|
||
|
struct pn533_cmd *cmd;
|
||
|
int rc;
|
||
|
|
||
|
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
|
||
|
if (!cmd)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
cmd->code = cmd_code;
|
||
|
cmd->req = req;
|
||
|
cmd->complete_cb = complete_cb;
|
||
|
cmd->complete_cb_context = complete_cb_context;
|
||
|
|
||
|
pn533_build_cmd_frame(dev, cmd_code, req);
|
||
|
|
||
|
dev->cmd = cmd;
|
||
|
rc = dev->phy_ops->send_frame(dev, req);
|
||
|
if (rc < 0) {
|
||
|
dev->cmd = NULL;
|
||
|
kfree(cmd);
|
||
|
}
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_cmd_complete(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
|
||
|
int rc;
|
||
|
|
||
|
rc = pn533_send_async_complete(dev);
|
||
|
if (rc != -EINPROGRESS)
|
||
|
queue_work(dev->wq, &dev->cmd_work);
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_cmd(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, cmd_work);
|
||
|
struct pn533_cmd *cmd;
|
||
|
int rc;
|
||
|
|
||
|
mutex_lock(&dev->cmd_lock);
|
||
|
|
||
|
if (list_empty(&dev->cmd_queue)) {
|
||
|
dev->cmd_pending = 0;
|
||
|
mutex_unlock(&dev->cmd_lock);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
|
||
|
|
||
|
list_del(&cmd->queue);
|
||
|
|
||
|
mutex_unlock(&dev->cmd_lock);
|
||
|
|
||
|
dev->cmd = cmd;
|
||
|
rc = dev->phy_ops->send_frame(dev, cmd->req);
|
||
|
if (rc < 0) {
|
||
|
dev->cmd = NULL;
|
||
|
dev_kfree_skb(cmd->req);
|
||
|
kfree(cmd);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
struct pn533_sync_cmd_response {
|
||
|
struct sk_buff *resp;
|
||
|
struct completion done;
|
||
|
};
|
||
|
|
||
|
static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
struct pn533_sync_cmd_response *arg = _arg;
|
||
|
|
||
|
arg->resp = resp;
|
||
|
complete(&arg->done);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/* 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)
|
||
|
{
|
||
|
int rc;
|
||
|
struct pn533_sync_cmd_response arg;
|
||
|
|
||
|
init_completion(&arg.done);
|
||
|
|
||
|
rc = pn533_send_cmd_async(dev, cmd_code, req,
|
||
|
pn533_send_sync_complete, &arg);
|
||
|
if (rc) {
|
||
|
dev_kfree_skb(req);
|
||
|
return ERR_PTR(rc);
|
||
|
}
|
||
|
|
||
|
wait_for_completion(&arg.done);
|
||
|
|
||
|
return arg.resp;
|
||
|
}
|
||
|
|
||
|
static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
|
||
|
{
|
||
|
struct sk_buff *skb;
|
||
|
|
||
|
skb = alloc_skb(dev->ops->tx_header_len +
|
||
|
size +
|
||
|
dev->ops->tx_tail_len, GFP_KERNEL);
|
||
|
|
||
|
if (skb)
|
||
|
skb_reserve(skb, dev->ops->tx_header_len);
|
||
|
|
||
|
return skb;
|
||
|
}
|
||
|
|
||
|
struct pn533_target_type_a {
|
||
|
__be16 sens_res;
|
||
|
u8 sel_res;
|
||
|
u8 nfcid_len;
|
||
|
u8 nfcid_data[];
|
||
|
} __packed;
|
||
|
|
||
|
|
||
|
#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
|
||
|
#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
|
||
|
#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
|
||
|
|
||
|
#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
|
||
|
#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
|
||
|
|
||
|
#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
|
||
|
#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
|
||
|
|
||
|
#define PN533_TYPE_A_SEL_PROT_MIFARE 0
|
||
|
#define PN533_TYPE_A_SEL_PROT_ISO14443 1
|
||
|
#define PN533_TYPE_A_SEL_PROT_DEP 2
|
||
|
#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
|
||
|
|
||
|
static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
|
||
|
int target_data_len)
|
||
|
{
|
||
|
u8 ssd;
|
||
|
u8 platconf;
|
||
|
|
||
|
if (target_data_len < sizeof(struct pn533_target_type_a))
|
||
|
return false;
|
||
|
|
||
|
/*
|
||
|
* The length check of nfcid[] and ats[] are not being performed because
|
||
|
* the values are not being used
|
||
|
*/
|
||
|
|
||
|
/* Requirement 4.6.3.3 from NFC Forum Digital Spec */
|
||
|
ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
|
||
|
platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
|
||
|
|
||
|
if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
|
||
|
platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
|
||
|
(ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
|
||
|
platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
|
||
|
return false;
|
||
|
|
||
|
/* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
|
||
|
if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
|
||
|
return false;
|
||
|
|
||
|
if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE)
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
|
||
|
int tgt_data_len)
|
||
|
{
|
||
|
struct pn533_target_type_a *tgt_type_a;
|
||
|
|
||
|
tgt_type_a = (struct pn533_target_type_a *)tgt_data;
|
||
|
|
||
|
if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
|
||
|
return -EPROTO;
|
||
|
|
||
|
switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
|
||
|
case PN533_TYPE_A_SEL_PROT_MIFARE:
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
|
||
|
break;
|
||
|
case PN533_TYPE_A_SEL_PROT_ISO14443:
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
|
||
|
break;
|
||
|
case PN533_TYPE_A_SEL_PROT_DEP:
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
|
||
|
break;
|
||
|
case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
|
||
|
NFC_PROTO_NFC_DEP_MASK;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
|
||
|
nfc_tgt->sel_res = tgt_type_a->sel_res;
|
||
|
nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
|
||
|
memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
struct pn533_target_felica {
|
||
|
u8 pol_res;
|
||
|
u8 opcode;
|
||
|
u8 nfcid2[NFC_NFCID2_MAXSIZE];
|
||
|
u8 pad[8];
|
||
|
/* optional */
|
||
|
u8 syst_code[];
|
||
|
} __packed;
|
||
|
|
||
|
#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
|
||
|
#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
|
||
|
|
||
|
static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
|
||
|
int target_data_len)
|
||
|
{
|
||
|
if (target_data_len < sizeof(struct pn533_target_felica))
|
||
|
return false;
|
||
|
|
||
|
if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
|
||
|
int tgt_data_len)
|
||
|
{
|
||
|
struct pn533_target_felica *tgt_felica;
|
||
|
|
||
|
tgt_felica = (struct pn533_target_felica *)tgt_data;
|
||
|
|
||
|
if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
|
||
|
return -EPROTO;
|
||
|
|
||
|
if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
|
||
|
(tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
|
||
|
else
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
|
||
|
|
||
|
memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
|
||
|
nfc_tgt->sensf_res_len = 9;
|
||
|
|
||
|
memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
|
||
|
nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
struct pn533_target_jewel {
|
||
|
__be16 sens_res;
|
||
|
u8 jewelid[4];
|
||
|
} __packed;
|
||
|
|
||
|
static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
|
||
|
int target_data_len)
|
||
|
{
|
||
|
u8 ssd;
|
||
|
u8 platconf;
|
||
|
|
||
|
if (target_data_len < sizeof(struct pn533_target_jewel))
|
||
|
return false;
|
||
|
|
||
|
/* Requirement 4.6.3.3 from NFC Forum Digital Spec */
|
||
|
ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
|
||
|
platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
|
||
|
|
||
|
if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
|
||
|
platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
|
||
|
(ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
|
||
|
platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
|
||
|
int tgt_data_len)
|
||
|
{
|
||
|
struct pn533_target_jewel *tgt_jewel;
|
||
|
|
||
|
tgt_jewel = (struct pn533_target_jewel *)tgt_data;
|
||
|
|
||
|
if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
|
||
|
return -EPROTO;
|
||
|
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
|
||
|
nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
|
||
|
nfc_tgt->nfcid1_len = 4;
|
||
|
memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
struct pn533_type_b_prot_info {
|
||
|
u8 bitrate;
|
||
|
u8 fsci_type;
|
||
|
u8 fwi_adc_fo;
|
||
|
} __packed;
|
||
|
|
||
|
#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
|
||
|
#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
|
||
|
#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
|
||
|
|
||
|
struct pn533_type_b_sens_res {
|
||
|
u8 opcode;
|
||
|
u8 nfcid[4];
|
||
|
u8 appdata[4];
|
||
|
struct pn533_type_b_prot_info prot_info;
|
||
|
} __packed;
|
||
|
|
||
|
#define PN533_TYPE_B_OPC_SENSB_RES 0x50
|
||
|
|
||
|
struct pn533_target_type_b {
|
||
|
struct pn533_type_b_sens_res sensb_res;
|
||
|
u8 attrib_res_len;
|
||
|
u8 attrib_res[];
|
||
|
} __packed;
|
||
|
|
||
|
static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
|
||
|
int target_data_len)
|
||
|
{
|
||
|
if (target_data_len < sizeof(struct pn533_target_type_b))
|
||
|
return false;
|
||
|
|
||
|
if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
|
||
|
return false;
|
||
|
|
||
|
if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
|
||
|
PN533_TYPE_B_PROT_TYPE_RFU_MASK)
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
|
||
|
int tgt_data_len)
|
||
|
{
|
||
|
struct pn533_target_type_b *tgt_type_b;
|
||
|
|
||
|
tgt_type_b = (struct pn533_target_type_b *)tgt_data;
|
||
|
|
||
|
if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
|
||
|
return -EPROTO;
|
||
|
|
||
|
nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
struct nfc_target nfc_tgt;
|
||
|
int rc;
|
||
|
|
||
|
dev_dbg(dev->dev, "%s: modulation=%d\n",
|
||
|
__func__, dev->poll_mod_curr);
|
||
|
|
||
|
if (tg != 1)
|
||
|
return -EPROTO;
|
||
|
|
||
|
memset(&nfc_tgt, 0, sizeof(struct nfc_target));
|
||
|
|
||
|
switch (dev->poll_mod_curr) {
|
||
|
case PN533_POLL_MOD_106KBPS_A:
|
||
|
rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
|
||
|
break;
|
||
|
case PN533_POLL_MOD_212KBPS_FELICA:
|
||
|
case PN533_POLL_MOD_424KBPS_FELICA:
|
||
|
rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
|
||
|
break;
|
||
|
case PN533_POLL_MOD_106KBPS_JEWEL:
|
||
|
rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
|
||
|
break;
|
||
|
case PN533_POLL_MOD_847KBPS_B:
|
||
|
rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
|
||
|
break;
|
||
|
default:
|
||
|
nfc_err(dev->dev,
|
||
|
"Unknown current poll modulation\n");
|
||
|
return -EPROTO;
|
||
|
}
|
||
|
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
|
||
|
if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
|
||
|
dev_dbg(dev->dev,
|
||
|
"The Tg found doesn't have the desired protocol\n");
|
||
|
return -EAGAIN;
|
||
|
}
|
||
|
|
||
|
dev_dbg(dev->dev,
|
||
|
"Target found - supported protocols: 0x%x\n",
|
||
|
nfc_tgt.supported_protocols);
|
||
|
|
||
|
dev->tgt_available_prots = nfc_tgt.supported_protocols;
|
||
|
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static inline void pn533_poll_next_mod(struct pn533 *dev)
|
||
|
{
|
||
|
dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
|
||
|
}
|
||
|
|
||
|
static void pn533_poll_reset_mod_list(struct pn533 *dev)
|
||
|
{
|
||
|
dev->poll_mod_count = 0;
|
||
|
}
|
||
|
|
||
|
static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
|
||
|
{
|
||
|
dev->poll_mod_active[dev->poll_mod_count] =
|
||
|
(struct pn533_poll_modulations *)&poll_mod[mod_index];
|
||
|
dev->poll_mod_count++;
|
||
|
}
|
||
|
|
||
|
static void pn533_poll_create_mod_list(struct pn533 *dev,
|
||
|
u32 im_protocols, u32 tm_protocols)
|
||
|
{
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
|
||
|
if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
|
||
|
(im_protocols & NFC_PROTO_ISO14443_MASK) ||
|
||
|
(im_protocols & NFC_PROTO_NFC_DEP_MASK))
|
||
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_FELICA_MASK ||
|
||
|
im_protocols & NFC_PROTO_NFC_DEP_MASK) {
|
||
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
|
||
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
|
||
|
}
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_JEWEL_MASK)
|
||
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
|
||
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
|
||
|
|
||
|
if (tm_protocols)
|
||
|
pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
|
||
|
}
|
||
|
|
||
|
static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
|
||
|
{
|
||
|
u8 nbtg, tg, *tgdata;
|
||
|
int rc, tgdata_len;
|
||
|
|
||
|
/* Toggle the DEP polling */
|
||
|
if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
|
||
|
dev->poll_dep = 1;
|
||
|
|
||
|
nbtg = resp->data[0];
|
||
|
tg = resp->data[1];
|
||
|
tgdata = &resp->data[2];
|
||
|
tgdata_len = resp->len - 2; /* nbtg + tg */
|
||
|
|
||
|
if (nbtg) {
|
||
|
rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
|
||
|
|
||
|
/* We must stop the poll after a valid target found */
|
||
|
if (rc == 0)
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
return -EAGAIN;
|
||
|
}
|
||
|
|
||
|
static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
|
||
|
{
|
||
|
struct sk_buff *skb;
|
||
|
u8 *felica, *nfcid3;
|
||
|
|
||
|
u8 *gbytes = dev->gb;
|
||
|
size_t gbytes_len = dev->gb_len;
|
||
|
|
||
|
u8 felica_params[18] = {0x1, 0xfe, /* DEP */
|
||
|
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
|
||
|
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
|
||
|
0xff, 0xff}; /* System code */
|
||
|
|
||
|
u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
|
||
|
0x0, 0x0, 0x0,
|
||
|
0x40}; /* SEL_RES for DEP */
|
||
|
|
||
|
unsigned int skb_len = 36 + /*
|
||
|
* mode (1), mifare (6),
|
||
|
* felica (18), nfcid3 (10), gb_len (1)
|
||
|
*/
|
||
|
gbytes_len +
|
||
|
1; /* len Tk*/
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, skb_len);
|
||
|
if (!skb)
|
||
|
return NULL;
|
||
|
|
||
|
/* DEP support only */
|
||
|
skb_put_u8(skb, PN533_INIT_TARGET_DEP);
|
||
|
|
||
|
/* MIFARE params */
|
||
|
skb_put_data(skb, mifare_params, 6);
|
||
|
|
||
|
/* Felica params */
|
||
|
felica = skb_put_data(skb, felica_params, 18);
|
||
|
get_random_bytes(felica + 2, 6);
|
||
|
|
||
|
/* NFCID3 */
|
||
|
nfcid3 = skb_put_zero(skb, 10);
|
||
|
memcpy(nfcid3, felica, 8);
|
||
|
|
||
|
/* General bytes */
|
||
|
skb_put_u8(skb, gbytes_len);
|
||
|
|
||
|
skb_put_data(skb, gbytes, gbytes_len);
|
||
|
|
||
|
/* Len Tk */
|
||
|
skb_put_u8(skb, 0);
|
||
|
|
||
|
return skb;
|
||
|
}
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
struct sk_buff *skb;
|
||
|
u8 status, ret, mi;
|
||
|
int rc;
|
||
|
|
||
|
if (IS_ERR(resp)) {
|
||
|
skb_queue_purge(&dev->resp_q);
|
||
|
return PTR_ERR(resp);
|
||
|
}
|
||
|
|
||
|
status = resp->data[0];
|
||
|
|
||
|
ret = status & PN533_CMD_RET_MASK;
|
||
|
mi = status & PN533_CMD_MI_MASK;
|
||
|
|
||
|
skb_pull(resp, sizeof(status));
|
||
|
|
||
|
if (ret != PN533_CMD_RET_SUCCESS) {
|
||
|
rc = -EIO;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
skb_queue_tail(&dev->resp_q, resp);
|
||
|
|
||
|
if (mi) {
|
||
|
queue_work(dev->wq, &dev->mi_tm_rx_work);
|
||
|
return -EINPROGRESS;
|
||
|
}
|
||
|
|
||
|
skb = pn533_build_response(dev);
|
||
|
if (!skb) {
|
||
|
rc = -EIO;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
return nfc_tm_data_received(dev->nfc_dev, skb);
|
||
|
|
||
|
error:
|
||
|
nfc_tm_deactivated(dev->nfc_dev);
|
||
|
dev->tgt_mode = 0;
|
||
|
skb_queue_purge(&dev->resp_q);
|
||
|
dev_kfree_skb(resp);
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_tm_mi_recv(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, 0);
|
||
|
if (!skb)
|
||
|
return;
|
||
|
|
||
|
rc = pn533_send_cmd_direct_async(dev,
|
||
|
PN533_CMD_TG_GET_DATA,
|
||
|
skb,
|
||
|
pn533_tm_get_data_complete,
|
||
|
NULL);
|
||
|
|
||
|
if (rc < 0)
|
||
|
dev_kfree_skb(skb);
|
||
|
}
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
|
||
|
/* Grab the first skb in the queue */
|
||
|
skb = skb_dequeue(&dev->fragment_skb);
|
||
|
if (skb == NULL) { /* No more data */
|
||
|
/* Reset the queue for future use */
|
||
|
skb_queue_head_init(&dev->fragment_skb);
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
/* last entry - remove MI bit */
|
||
|
if (skb_queue_len(&dev->fragment_skb) == 0) {
|
||
|
rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
|
||
|
skb, pn533_tm_send_complete, NULL);
|
||
|
} else
|
||
|
rc = pn533_send_cmd_direct_async(dev,
|
||
|
PN533_CMD_TG_SET_META_DATA,
|
||
|
skb, pn533_tm_send_complete, NULL);
|
||
|
|
||
|
if (rc == 0) /* success */
|
||
|
return;
|
||
|
|
||
|
dev_err(dev->dev,
|
||
|
"Error %d when trying to perform set meta data_exchange", rc);
|
||
|
|
||
|
dev_kfree_skb(skb);
|
||
|
|
||
|
error:
|
||
|
dev->phy_ops->send_ack(dev, GFP_KERNEL);
|
||
|
queue_work(dev->wq, &dev->cmd_work);
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_tg_get_data(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, tg_work);
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, 0);
|
||
|
if (!skb)
|
||
|
return;
|
||
|
|
||
|
rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
|
||
|
pn533_tm_get_data_complete, NULL);
|
||
|
|
||
|
if (rc < 0)
|
||
|
dev_kfree_skb(skb);
|
||
|
}
|
||
|
|
||
|
#define ATR_REQ_GB_OFFSET 17
|
||
|
static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
|
||
|
{
|
||
|
u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
|
||
|
size_t gb_len;
|
||
|
int rc;
|
||
|
|
||
|
if (resp->len < ATR_REQ_GB_OFFSET + 1)
|
||
|
return -EINVAL;
|
||
|
|
||
|
mode = resp->data[0];
|
||
|
cmd = &resp->data[1];
|
||
|
|
||
|
dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
|
||
|
mode, resp->len);
|
||
|
|
||
|
if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
|
||
|
PN533_INIT_TARGET_RESP_ACTIVE)
|
||
|
comm_mode = NFC_COMM_ACTIVE;
|
||
|
|
||
|
if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
|
||
|
return -EOPNOTSUPP;
|
||
|
|
||
|
gb = cmd + ATR_REQ_GB_OFFSET;
|
||
|
gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
|
||
|
|
||
|
rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
|
||
|
comm_mode, gb, gb_len);
|
||
|
if (rc < 0) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Error when signaling target activation\n");
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
dev->tgt_mode = 1;
|
||
|
queue_work(dev->wq, &dev->tg_work);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void pn533_listen_mode_timer(struct timer_list *t)
|
||
|
{
|
||
|
struct pn533 *dev = from_timer(dev, t, listen_timer);
|
||
|
|
||
|
dev->cancel_listen = 1;
|
||
|
|
||
|
pn533_poll_next_mod(dev);
|
||
|
|
||
|
queue_delayed_work(dev->wq, &dev->poll_work,
|
||
|
msecs_to_jiffies(PN533_POLL_INTERVAL));
|
||
|
}
|
||
|
|
||
|
static int pn533_rf_complete(struct pn533 *dev, void *arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
int rc = 0;
|
||
|
|
||
|
if (IS_ERR(resp)) {
|
||
|
rc = PTR_ERR(resp);
|
||
|
|
||
|
nfc_err(dev->dev, "RF setting error %d\n", rc);
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
queue_delayed_work(dev->wq, &dev->poll_work,
|
||
|
msecs_to_jiffies(PN533_POLL_INTERVAL));
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_rf(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, rf_work);
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, 2);
|
||
|
if (!skb)
|
||
|
return;
|
||
|
|
||
|
skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
|
||
|
skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
|
||
|
|
||
|
rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
|
||
|
pn533_rf_complete, NULL);
|
||
|
if (rc < 0) {
|
||
|
dev_kfree_skb(skb);
|
||
|
nfc_err(dev->dev, "RF setting error %d\n", rc);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
struct pn533_cmd_jump_dep_response *rsp;
|
||
|
struct nfc_target nfc_target;
|
||
|
u8 target_gt_len;
|
||
|
int rc;
|
||
|
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
memset(&nfc_target, 0, sizeof(struct nfc_target));
|
||
|
|
||
|
rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
|
||
|
|
||
|
rc = rsp->status & PN533_CMD_RET_MASK;
|
||
|
if (rc != PN533_CMD_RET_SUCCESS) {
|
||
|
/* Not target found, turn radio off */
|
||
|
queue_work(dev->wq, &dev->rf_work);
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
dev_dbg(dev->dev, "Creating new target");
|
||
|
|
||
|
nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
|
||
|
nfc_target.nfcid1_len = 10;
|
||
|
memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
|
||
|
rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
|
||
|
if (rc)
|
||
|
goto error;
|
||
|
|
||
|
dev->tgt_available_prots = 0;
|
||
|
dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
|
||
|
|
||
|
/* ATR_RES general bytes are located at offset 17 */
|
||
|
target_gt_len = resp->len - 17;
|
||
|
rc = nfc_set_remote_general_bytes(dev->nfc_dev,
|
||
|
rsp->gt, target_gt_len);
|
||
|
if (!rc) {
|
||
|
rc = nfc_dep_link_is_up(dev->nfc_dev,
|
||
|
dev->nfc_dev->targets[0].idx,
|
||
|
0, NFC_RF_INITIATOR);
|
||
|
|
||
|
if (!rc)
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
}
|
||
|
error:
|
||
|
dev_kfree_skb(resp);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
#define PASSIVE_DATA_LEN 5
|
||
|
static int pn533_poll_dep(struct nfc_dev *nfc_dev)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
struct sk_buff *skb;
|
||
|
int rc, skb_len;
|
||
|
u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
|
||
|
u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
|
||
|
|
||
|
if (!dev->gb) {
|
||
|
dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
|
||
|
|
||
|
if (!dev->gb || !dev->gb_len) {
|
||
|
dev->poll_dep = 0;
|
||
|
queue_work(dev->wq, &dev->rf_work);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
|
||
|
skb_len += PASSIVE_DATA_LEN;
|
||
|
|
||
|
/* NFCID3 */
|
||
|
skb_len += NFC_NFCID3_MAXSIZE;
|
||
|
nfcid3[0] = 0x1;
|
||
|
nfcid3[1] = 0xfe;
|
||
|
get_random_bytes(nfcid3 + 2, 6);
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, skb_len);
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
skb_put_u8(skb, 0x01); /* Active */
|
||
|
skb_put_u8(skb, 0x02); /* 424 kbps */
|
||
|
|
||
|
next = skb_put(skb, 1); /* Next */
|
||
|
*next = 0;
|
||
|
|
||
|
/* Copy passive data */
|
||
|
skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
|
||
|
*next |= 1;
|
||
|
|
||
|
/* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
|
||
|
skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
|
||
|
*next |= 2;
|
||
|
|
||
|
skb_put_data(skb, dev->gb, dev->gb_len);
|
||
|
*next |= 4; /* We have some Gi */
|
||
|
|
||
|
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
|
||
|
pn533_poll_dep_complete, NULL);
|
||
|
|
||
|
if (rc < 0)
|
||
|
dev_kfree_skb(skb);
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static int pn533_autopoll_complete(struct pn533 *dev, void *arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
struct pn532_autopoll_resp *apr;
|
||
|
struct nfc_target nfc_tgt;
|
||
|
u8 nbtg;
|
||
|
int rc;
|
||
|
|
||
|
if (IS_ERR(resp)) {
|
||
|
rc = PTR_ERR(resp);
|
||
|
|
||
|
nfc_err(dev->dev, "%s autopoll complete error %d\n",
|
||
|
__func__, rc);
|
||
|
|
||
|
if (rc == -ENOENT) {
|
||
|
if (dev->poll_mod_count != 0)
|
||
|
return rc;
|
||
|
goto stop_poll;
|
||
|
} else if (rc < 0) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Error %d when running autopoll\n", rc);
|
||
|
goto stop_poll;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
nbtg = resp->data[0];
|
||
|
if ((nbtg > 2) || (nbtg <= 0))
|
||
|
return -EAGAIN;
|
||
|
|
||
|
apr = (struct pn532_autopoll_resp *)&resp->data[1];
|
||
|
while (nbtg--) {
|
||
|
memset(&nfc_tgt, 0, sizeof(struct nfc_target));
|
||
|
switch (apr->type) {
|
||
|
case PN532_AUTOPOLL_TYPE_ISOA:
|
||
|
dev_dbg(dev->dev, "ISOA\n");
|
||
|
rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
|
||
|
apr->ln - 1);
|
||
|
break;
|
||
|
case PN532_AUTOPOLL_TYPE_FELICA212:
|
||
|
case PN532_AUTOPOLL_TYPE_FELICA424:
|
||
|
dev_dbg(dev->dev, "FELICA\n");
|
||
|
rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata,
|
||
|
apr->ln - 1);
|
||
|
break;
|
||
|
case PN532_AUTOPOLL_TYPE_JEWEL:
|
||
|
dev_dbg(dev->dev, "JEWEL\n");
|
||
|
rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata,
|
||
|
apr->ln - 1);
|
||
|
break;
|
||
|
case PN532_AUTOPOLL_TYPE_ISOB:
|
||
|
dev_dbg(dev->dev, "ISOB\n");
|
||
|
rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata,
|
||
|
apr->ln - 1);
|
||
|
break;
|
||
|
case PN532_AUTOPOLL_TYPE_MIFARE:
|
||
|
dev_dbg(dev->dev, "Mifare\n");
|
||
|
rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
|
||
|
apr->ln - 1);
|
||
|
break;
|
||
|
default:
|
||
|
nfc_err(dev->dev,
|
||
|
"Unknown current poll modulation\n");
|
||
|
rc = -EPROTO;
|
||
|
}
|
||
|
|
||
|
if (rc)
|
||
|
goto done;
|
||
|
|
||
|
if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
|
||
|
nfc_err(dev->dev,
|
||
|
"The Tg found doesn't have the desired protocol\n");
|
||
|
rc = -EAGAIN;
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
dev->tgt_available_prots = nfc_tgt.supported_protocols;
|
||
|
apr = (struct pn532_autopoll_resp *)
|
||
|
(apr->tgdata + (apr->ln - 1));
|
||
|
}
|
||
|
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
|
||
|
|
||
|
done:
|
||
|
dev_kfree_skb(resp);
|
||
|
return rc;
|
||
|
|
||
|
stop_poll:
|
||
|
nfc_err(dev->dev, "autopoll operation has been stopped\n");
|
||
|
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
dev->poll_protocols = 0;
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static int pn533_poll_complete(struct pn533 *dev, void *arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
struct pn533_poll_modulations *cur_mod;
|
||
|
int rc;
|
||
|
|
||
|
if (IS_ERR(resp)) {
|
||
|
rc = PTR_ERR(resp);
|
||
|
|
||
|
nfc_err(dev->dev, "%s Poll complete error %d\n",
|
||
|
__func__, rc);
|
||
|
|
||
|
if (rc == -ENOENT) {
|
||
|
if (dev->poll_mod_count != 0)
|
||
|
return rc;
|
||
|
goto stop_poll;
|
||
|
} else if (rc < 0) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Error %d when running poll\n", rc);
|
||
|
goto stop_poll;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
|
||
|
|
||
|
if (cur_mod->len == 0) { /* Target mode */
|
||
|
del_timer(&dev->listen_timer);
|
||
|
rc = pn533_init_target_complete(dev, resp);
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
/* Initiator mode */
|
||
|
rc = pn533_start_poll_complete(dev, resp);
|
||
|
if (!rc)
|
||
|
goto done;
|
||
|
|
||
|
if (!dev->poll_mod_count) {
|
||
|
dev_dbg(dev->dev, "Polling has been stopped\n");
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
pn533_poll_next_mod(dev);
|
||
|
/* Not target found, turn radio off */
|
||
|
queue_work(dev->wq, &dev->rf_work);
|
||
|
|
||
|
done:
|
||
|
dev_kfree_skb(resp);
|
||
|
return rc;
|
||
|
|
||
|
stop_poll:
|
||
|
nfc_err(dev->dev, "Polling operation has been stopped\n");
|
||
|
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
dev->poll_protocols = 0;
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
|
||
|
struct pn533_poll_modulations *mod)
|
||
|
{
|
||
|
struct sk_buff *skb;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, mod->len);
|
||
|
if (!skb)
|
||
|
return NULL;
|
||
|
|
||
|
skb_put_data(skb, &mod->data, mod->len);
|
||
|
|
||
|
return skb;
|
||
|
}
|
||
|
|
||
|
static int pn533_send_poll_frame(struct pn533 *dev)
|
||
|
{
|
||
|
struct pn533_poll_modulations *mod;
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
u8 cmd_code;
|
||
|
|
||
|
mod = dev->poll_mod_active[dev->poll_mod_curr];
|
||
|
|
||
|
dev_dbg(dev->dev, "%s mod len %d\n",
|
||
|
__func__, mod->len);
|
||
|
|
||
|
if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) {
|
||
|
dev->poll_dep = 0;
|
||
|
return pn533_poll_dep(dev->nfc_dev);
|
||
|
}
|
||
|
|
||
|
if (mod->len == 0) { /* Listen mode */
|
||
|
cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
|
||
|
skb = pn533_alloc_poll_tg_frame(dev);
|
||
|
} else { /* Polling mode */
|
||
|
cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
|
||
|
skb = pn533_alloc_poll_in_frame(dev, mod);
|
||
|
}
|
||
|
|
||
|
if (!skb) {
|
||
|
nfc_err(dev->dev, "Failed to allocate skb\n");
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
|
||
|
NULL);
|
||
|
if (rc < 0) {
|
||
|
dev_kfree_skb(skb);
|
||
|
nfc_err(dev->dev, "Polling loop error %d\n", rc);
|
||
|
}
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_poll(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
|
||
|
struct pn533_poll_modulations *cur_mod;
|
||
|
int rc;
|
||
|
|
||
|
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
|
||
|
|
||
|
dev_dbg(dev->dev,
|
||
|
"%s cancel_listen %d modulation len %d\n",
|
||
|
__func__, dev->cancel_listen, cur_mod->len);
|
||
|
|
||
|
if (dev->cancel_listen == 1) {
|
||
|
dev->cancel_listen = 0;
|
||
|
dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
|
||
|
}
|
||
|
|
||
|
rc = pn533_send_poll_frame(dev);
|
||
|
if (rc)
|
||
|
return;
|
||
|
|
||
|
if (cur_mod->len == 0 && dev->poll_mod_count > 1)
|
||
|
mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
|
||
|
}
|
||
|
|
||
|
static int pn533_start_poll(struct nfc_dev *nfc_dev,
|
||
|
u32 im_protocols, u32 tm_protocols)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
struct pn533_poll_modulations *cur_mod;
|
||
|
struct sk_buff *skb;
|
||
|
u8 rand_mod;
|
||
|
int rc;
|
||
|
|
||
|
dev_dbg(dev->dev,
|
||
|
"%s: im protocols 0x%x tm protocols 0x%x\n",
|
||
|
__func__, im_protocols, tm_protocols);
|
||
|
|
||
|
if (dev->tgt_active_prot) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Cannot poll with a target already activated\n");
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
|
||
|
if (dev->tgt_mode) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Cannot poll while already being activated\n");
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
|
||
|
if (tm_protocols) {
|
||
|
dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
|
||
|
if (dev->gb == NULL)
|
||
|
tm_protocols = 0;
|
||
|
}
|
||
|
|
||
|
dev->poll_protocols = im_protocols;
|
||
|
dev->listen_protocols = tm_protocols;
|
||
|
if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) {
|
||
|
skb = pn533_alloc_skb(dev, 4 + 6);
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_POLLNR_INFINITE;
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD;
|
||
|
|
||
|
if ((im_protocols & NFC_PROTO_MIFARE_MASK) &&
|
||
|
(im_protocols & NFC_PROTO_ISO14443_MASK) &&
|
||
|
(im_protocols & NFC_PROTO_NFC_DEP_MASK))
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_GENERIC_106;
|
||
|
else {
|
||
|
if (im_protocols & NFC_PROTO_MIFARE_MASK)
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_MIFARE;
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_ISO14443_MASK)
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_ISOA;
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_FELICA_MASK ||
|
||
|
im_protocols & NFC_PROTO_NFC_DEP_MASK) {
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_FELICA212;
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_FELICA424;
|
||
|
}
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_JEWEL_MASK)
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_JEWEL;
|
||
|
|
||
|
if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_ISOB;
|
||
|
|
||
|
if (tm_protocols)
|
||
|
*((u8 *)skb_put(skb, sizeof(u8))) =
|
||
|
PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
|
||
|
|
||
|
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
|
||
|
pn533_autopoll_complete, NULL);
|
||
|
|
||
|
if (rc < 0)
|
||
|
dev_kfree_skb(skb);
|
||
|
else
|
||
|
dev->poll_mod_count++;
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
|
||
|
|
||
|
/* Do not always start polling from the same modulation */
|
||
|
get_random_bytes(&rand_mod, sizeof(rand_mod));
|
||
|
rand_mod %= dev->poll_mod_count;
|
||
|
dev->poll_mod_curr = rand_mod;
|
||
|
|
||
|
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
|
||
|
|
||
|
rc = pn533_send_poll_frame(dev);
|
||
|
|
||
|
/* Start listen timer */
|
||
|
if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
|
||
|
mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void pn533_stop_poll(struct nfc_dev *nfc_dev)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
|
||
|
del_timer(&dev->listen_timer);
|
||
|
|
||
|
if (!dev->poll_mod_count) {
|
||
|
dev_dbg(dev->dev,
|
||
|
"Polling operation was not running\n");
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
|
||
|
flush_delayed_work(&dev->poll_work);
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
}
|
||
|
|
||
|
static int pn533_activate_target_nfcdep(struct pn533 *dev)
|
||
|
{
|
||
|
struct pn533_cmd_activate_response *rsp;
|
||
|
u16 gt_len;
|
||
|
int rc;
|
||
|
struct sk_buff *skb;
|
||
|
struct sk_buff *resp;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
skb_put_u8(skb, 1); /* TG */
|
||
|
skb_put_u8(skb, 0); /* Next */
|
||
|
|
||
|
resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
rsp = (struct pn533_cmd_activate_response *)resp->data;
|
||
|
rc = rsp->status & PN533_CMD_RET_MASK;
|
||
|
if (rc != PN533_CMD_RET_SUCCESS) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Target activation failed (error 0x%x)\n", rc);
|
||
|
dev_kfree_skb(resp);
|
||
|
return -EIO;
|
||
|
}
|
||
|
|
||
|
/* ATR_RES general bytes are located at offset 16 */
|
||
|
gt_len = resp->len - 16;
|
||
|
rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static int pn533_activate_target(struct nfc_dev *nfc_dev,
|
||
|
struct nfc_target *target, u32 protocol)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
int rc;
|
||
|
|
||
|
dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
|
||
|
|
||
|
if (dev->poll_mod_count) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Cannot activate while polling\n");
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
|
||
|
if (dev->tgt_active_prot) {
|
||
|
nfc_err(dev->dev,
|
||
|
"There is already an active target\n");
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
|
||
|
if (!dev->tgt_available_prots) {
|
||
|
nfc_err(dev->dev,
|
||
|
"There is no available target to activate\n");
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
if (!(dev->tgt_available_prots & (1 << protocol))) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Target doesn't support requested proto %u\n",
|
||
|
protocol);
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
if (protocol == NFC_PROTO_NFC_DEP) {
|
||
|
rc = pn533_activate_target_nfcdep(dev);
|
||
|
if (rc) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Activating target with DEP failed %d\n", rc);
|
||
|
return rc;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
dev->tgt_active_prot = protocol;
|
||
|
dev->tgt_available_prots = 0;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
int rc = 0;
|
||
|
|
||
|
if (IS_ERR(resp)) {
|
||
|
rc = PTR_ERR(resp);
|
||
|
|
||
|
nfc_err(dev->dev, "Target release error %d\n", rc);
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
rc = resp->data[0] & PN533_CMD_RET_MASK;
|
||
|
if (rc != PN533_CMD_RET_SUCCESS)
|
||
|
nfc_err(dev->dev,
|
||
|
"Error 0x%x when releasing the target\n", rc);
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
|
||
|
struct nfc_target *target, u8 mode)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
|
||
|
if (!dev->tgt_active_prot) {
|
||
|
nfc_err(dev->dev, "There is no active target\n");
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
dev->tgt_active_prot = 0;
|
||
|
skb_queue_purge(&dev->resp_q);
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, sizeof(u8));
|
||
|
if (!skb)
|
||
|
return;
|
||
|
|
||
|
skb_put_u8(skb, 1); /* TG*/
|
||
|
|
||
|
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
|
||
|
pn533_deactivate_target_complete, NULL);
|
||
|
if (rc < 0) {
|
||
|
dev_kfree_skb(skb);
|
||
|
nfc_err(dev->dev, "Target release error %d\n", rc);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
struct pn533_cmd_jump_dep_response *rsp;
|
||
|
u8 target_gt_len;
|
||
|
int rc;
|
||
|
u8 active = *(u8 *)arg;
|
||
|
|
||
|
kfree(arg);
|
||
|
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
if (dev->tgt_available_prots &&
|
||
|
!(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
|
||
|
nfc_err(dev->dev,
|
||
|
"The target does not support DEP\n");
|
||
|
rc = -EINVAL;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
|
||
|
|
||
|
rc = rsp->status & PN533_CMD_RET_MASK;
|
||
|
if (rc != PN533_CMD_RET_SUCCESS) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Bringing DEP link up failed (error 0x%x)\n", rc);
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
if (!dev->tgt_available_prots) {
|
||
|
struct nfc_target nfc_target;
|
||
|
|
||
|
dev_dbg(dev->dev, "Creating new target\n");
|
||
|
|
||
|
memset(&nfc_target, 0, sizeof(struct nfc_target));
|
||
|
|
||
|
nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
|
||
|
nfc_target.nfcid1_len = 10;
|
||
|
memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
|
||
|
rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
|
||
|
if (rc)
|
||
|
goto error;
|
||
|
|
||
|
dev->tgt_available_prots = 0;
|
||
|
}
|
||
|
|
||
|
dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
|
||
|
|
||
|
/* ATR_RES general bytes are located at offset 17 */
|
||
|
target_gt_len = resp->len - 17;
|
||
|
rc = nfc_set_remote_general_bytes(dev->nfc_dev,
|
||
|
rsp->gt, target_gt_len);
|
||
|
if (rc == 0)
|
||
|
rc = nfc_dep_link_is_up(dev->nfc_dev,
|
||
|
dev->nfc_dev->targets[0].idx,
|
||
|
!active, NFC_RF_INITIATOR);
|
||
|
|
||
|
error:
|
||
|
dev_kfree_skb(resp);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
struct sk_buff *skb;
|
||
|
int rc, skb_len;
|
||
|
u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
|
||
|
u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
|
||
|
|
||
|
if (dev->poll_mod_count) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Cannot bring the DEP link up while polling\n");
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
|
||
|
if (dev->tgt_active_prot) {
|
||
|
nfc_err(dev->dev,
|
||
|
"There is already an active target\n");
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
|
||
|
skb_len = 3 + gb_len; /* ActPass + BR + Next */
|
||
|
skb_len += PASSIVE_DATA_LEN;
|
||
|
|
||
|
/* NFCID3 */
|
||
|
skb_len += NFC_NFCID3_MAXSIZE;
|
||
|
if (target && !target->nfcid2_len) {
|
||
|
nfcid3[0] = 0x1;
|
||
|
nfcid3[1] = 0xfe;
|
||
|
get_random_bytes(nfcid3 + 2, 6);
|
||
|
}
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, skb_len);
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
skb_put_u8(skb, !comm_mode); /* ActPass */
|
||
|
skb_put_u8(skb, 0x02); /* 424 kbps */
|
||
|
|
||
|
next = skb_put(skb, 1); /* Next */
|
||
|
*next = 0;
|
||
|
|
||
|
/* Copy passive data */
|
||
|
skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
|
||
|
*next |= 1;
|
||
|
|
||
|
/* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
|
||
|
if (target && target->nfcid2_len)
|
||
|
memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
|
||
|
target->nfcid2_len);
|
||
|
else
|
||
|
skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
|
||
|
*next |= 2;
|
||
|
|
||
|
if (gb != NULL && gb_len > 0) {
|
||
|
skb_put_data(skb, gb, gb_len);
|
||
|
*next |= 4; /* We have some Gi */
|
||
|
} else {
|
||
|
*next = 0;
|
||
|
}
|
||
|
|
||
|
arg = kmalloc(sizeof(*arg), GFP_KERNEL);
|
||
|
if (!arg) {
|
||
|
dev_kfree_skb(skb);
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
*arg = !comm_mode;
|
||
|
|
||
|
pn533_rf_field(dev->nfc_dev, 0);
|
||
|
|
||
|
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
|
||
|
pn533_in_dep_link_up_complete, arg);
|
||
|
|
||
|
if (rc < 0) {
|
||
|
dev_kfree_skb(skb);
|
||
|
kfree(arg);
|
||
|
}
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
|
||
|
pn533_poll_reset_mod_list(dev);
|
||
|
|
||
|
if (dev->tgt_mode || dev->tgt_active_prot)
|
||
|
dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
|
||
|
|
||
|
dev->tgt_active_prot = 0;
|
||
|
dev->tgt_mode = 0;
|
||
|
|
||
|
skb_queue_purge(&dev->resp_q);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
struct pn533_data_exchange_arg {
|
||
|
data_exchange_cb_t cb;
|
||
|
void *cb_context;
|
||
|
};
|
||
|
|
||
|
static struct sk_buff *pn533_build_response(struct pn533 *dev)
|
||
|
{
|
||
|
struct sk_buff *skb, *tmp, *t;
|
||
|
unsigned int skb_len = 0, tmp_len = 0;
|
||
|
|
||
|
if (skb_queue_empty(&dev->resp_q))
|
||
|
return NULL;
|
||
|
|
||
|
if (skb_queue_len(&dev->resp_q) == 1) {
|
||
|
skb = skb_dequeue(&dev->resp_q);
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
skb_queue_walk_safe(&dev->resp_q, tmp, t)
|
||
|
skb_len += tmp->len;
|
||
|
|
||
|
dev_dbg(dev->dev, "%s total length %d\n",
|
||
|
__func__, skb_len);
|
||
|
|
||
|
skb = alloc_skb(skb_len, GFP_KERNEL);
|
||
|
if (skb == NULL)
|
||
|
goto out;
|
||
|
|
||
|
skb_put(skb, skb_len);
|
||
|
|
||
|
skb_queue_walk_safe(&dev->resp_q, tmp, t) {
|
||
|
memcpy(skb->data + tmp_len, tmp->data, tmp->len);
|
||
|
tmp_len += tmp->len;
|
||
|
}
|
||
|
|
||
|
out:
|
||
|
skb_queue_purge(&dev->resp_q);
|
||
|
|
||
|
return skb;
|
||
|
}
|
||
|
|
||
|
static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
struct pn533_data_exchange_arg *arg = _arg;
|
||
|
struct sk_buff *skb;
|
||
|
int rc = 0;
|
||
|
u8 status, ret, mi;
|
||
|
|
||
|
if (IS_ERR(resp)) {
|
||
|
rc = PTR_ERR(resp);
|
||
|
goto _error;
|
||
|
}
|
||
|
|
||
|
status = resp->data[0];
|
||
|
ret = status & PN533_CMD_RET_MASK;
|
||
|
mi = status & PN533_CMD_MI_MASK;
|
||
|
|
||
|
skb_pull(resp, sizeof(status));
|
||
|
|
||
|
if (ret != PN533_CMD_RET_SUCCESS) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Exchanging data failed (error 0x%x)\n", ret);
|
||
|
rc = -EIO;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
skb_queue_tail(&dev->resp_q, resp);
|
||
|
|
||
|
if (mi) {
|
||
|
dev->cmd_complete_mi_arg = arg;
|
||
|
queue_work(dev->wq, &dev->mi_rx_work);
|
||
|
return -EINPROGRESS;
|
||
|
}
|
||
|
|
||
|
/* Prepare for the next round */
|
||
|
if (skb_queue_len(&dev->fragment_skb) > 0) {
|
||
|
dev->cmd_complete_dep_arg = arg;
|
||
|
queue_work(dev->wq, &dev->mi_tx_work);
|
||
|
|
||
|
return -EINPROGRESS;
|
||
|
}
|
||
|
|
||
|
skb = pn533_build_response(dev);
|
||
|
if (!skb) {
|
||
|
rc = -ENOMEM;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
arg->cb(arg->cb_context, skb, 0);
|
||
|
kfree(arg);
|
||
|
return 0;
|
||
|
|
||
|
error:
|
||
|
dev_kfree_skb(resp);
|
||
|
_error:
|
||
|
skb_queue_purge(&dev->resp_q);
|
||
|
arg->cb(arg->cb_context, NULL, rc);
|
||
|
kfree(arg);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* 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)
|
||
|
{
|
||
|
if (!dev->cmd)
|
||
|
goto sched_wq;
|
||
|
|
||
|
dev->cmd->status = status;
|
||
|
|
||
|
if (status != 0) {
|
||
|
dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
|
||
|
goto sched_wq;
|
||
|
}
|
||
|
|
||
|
if (skb == NULL) {
|
||
|
dev_err(dev->dev, "NULL Frame -> link is dead\n");
|
||
|
goto sched_wq;
|
||
|
}
|
||
|
|
||
|
if (pn533_rx_frame_is_ack(skb->data)) {
|
||
|
dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
|
||
|
dev_kfree_skb(skb);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
|
||
|
dev->ops->rx_frame_size(skb->data), false);
|
||
|
|
||
|
if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
|
||
|
nfc_err(dev->dev, "Received an invalid frame\n");
|
||
|
dev->cmd->status = -EIO;
|
||
|
} else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
|
||
|
nfc_err(dev->dev, "It it not the response to the last command\n");
|
||
|
dev->cmd->status = -EIO;
|
||
|
}
|
||
|
|
||
|
dev->cmd->resp = skb;
|
||
|
|
||
|
sched_wq:
|
||
|
queue_work(dev->wq, &dev->cmd_complete_work);
|
||
|
}
|
||
|
EXPORT_SYMBOL(pn533_recv_frame);
|
||
|
|
||
|
/* Split the Tx skb into small chunks */
|
||
|
static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
|
||
|
{
|
||
|
struct sk_buff *frag;
|
||
|
int frag_size;
|
||
|
|
||
|
do {
|
||
|
/* Remaining size */
|
||
|
if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
|
||
|
frag_size = PN533_CMD_DATAFRAME_MAXLEN;
|
||
|
else
|
||
|
frag_size = skb->len;
|
||
|
|
||
|
/* Allocate and reserve */
|
||
|
frag = pn533_alloc_skb(dev, frag_size);
|
||
|
if (!frag) {
|
||
|
skb_queue_purge(&dev->fragment_skb);
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
if (!dev->tgt_mode) {
|
||
|
/* Reserve the TG/MI byte */
|
||
|
skb_reserve(frag, 1);
|
||
|
|
||
|
/* MI + TG */
|
||
|
if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
|
||
|
*(u8 *)skb_push(frag, sizeof(u8)) =
|
||
|
(PN533_CMD_MI_MASK | 1);
|
||
|
else
|
||
|
*(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */
|
||
|
}
|
||
|
|
||
|
skb_put_data(frag, skb->data, frag_size);
|
||
|
|
||
|
/* Reduce the size of incoming buffer */
|
||
|
skb_pull(skb, frag_size);
|
||
|
|
||
|
/* Add this to skb_queue */
|
||
|
skb_queue_tail(&dev->fragment_skb, frag);
|
||
|
|
||
|
} while (skb->len > 0);
|
||
|
|
||
|
dev_kfree_skb(skb);
|
||
|
|
||
|
return skb_queue_len(&dev->fragment_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)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
struct pn533_data_exchange_arg *arg = NULL;
|
||
|
int rc;
|
||
|
|
||
|
if (!dev->tgt_active_prot) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Can't exchange data if there is no active target\n");
|
||
|
rc = -EINVAL;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
arg = kmalloc(sizeof(*arg), GFP_KERNEL);
|
||
|
if (!arg) {
|
||
|
rc = -ENOMEM;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
arg->cb = cb;
|
||
|
arg->cb_context = cb_context;
|
||
|
|
||
|
switch (dev->device_type) {
|
||
|
case PN533_DEVICE_PASORI:
|
||
|
if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
|
||
|
rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
|
||
|
skb,
|
||
|
pn533_data_exchange_complete,
|
||
|
arg);
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
fallthrough;
|
||
|
default:
|
||
|
/* jumbo frame ? */
|
||
|
if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
|
||
|
rc = pn533_fill_fragment_skbs(dev, skb);
|
||
|
if (rc < 0)
|
||
|
goto error;
|
||
|
|
||
|
skb = skb_dequeue(&dev->fragment_skb);
|
||
|
if (!skb) {
|
||
|
rc = -EIO;
|
||
|
goto error;
|
||
|
}
|
||
|
} else {
|
||
|
*(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */
|
||
|
}
|
||
|
|
||
|
rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
|
||
|
skb, pn533_data_exchange_complete,
|
||
|
arg);
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (rc < 0) /* rc from send_async */
|
||
|
goto error;
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
error:
|
||
|
kfree(arg);
|
||
|
dev_kfree_skb(skb);
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
|
||
|
struct sk_buff *resp)
|
||
|
{
|
||
|
u8 status;
|
||
|
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
status = resp->data[0];
|
||
|
|
||
|
/* Prepare for the next round */
|
||
|
if (skb_queue_len(&dev->fragment_skb) > 0) {
|
||
|
queue_work(dev->wq, &dev->mi_tm_tx_work);
|
||
|
return -EINPROGRESS;
|
||
|
}
|
||
|
dev_kfree_skb(resp);
|
||
|
|
||
|
if (status != 0) {
|
||
|
nfc_tm_deactivated(dev->nfc_dev);
|
||
|
|
||
|
dev->tgt_mode = 0;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
queue_work(dev->wq, &dev->tg_work);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
int rc;
|
||
|
|
||
|
/* let's split in multiple chunks if size's too big */
|
||
|
if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
|
||
|
rc = pn533_fill_fragment_skbs(dev, skb);
|
||
|
if (rc < 0)
|
||
|
goto error;
|
||
|
|
||
|
/* get the first skb */
|
||
|
skb = skb_dequeue(&dev->fragment_skb);
|
||
|
if (!skb) {
|
||
|
rc = -EIO;
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
|
||
|
pn533_tm_send_complete, NULL);
|
||
|
} else {
|
||
|
/* Send th skb */
|
||
|
rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
|
||
|
pn533_tm_send_complete, NULL);
|
||
|
}
|
||
|
|
||
|
error:
|
||
|
if (rc < 0) {
|
||
|
dev_kfree_skb(skb);
|
||
|
skb_queue_purge(&dev->fragment_skb);
|
||
|
}
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_mi_recv(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
|
||
|
if (!skb)
|
||
|
goto error;
|
||
|
|
||
|
switch (dev->device_type) {
|
||
|
case PN533_DEVICE_PASORI:
|
||
|
if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
|
||
|
rc = pn533_send_cmd_direct_async(dev,
|
||
|
PN533_CMD_IN_COMM_THRU,
|
||
|
skb,
|
||
|
pn533_data_exchange_complete,
|
||
|
dev->cmd_complete_mi_arg);
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
fallthrough;
|
||
|
default:
|
||
|
skb_put_u8(skb, 1); /*TG*/
|
||
|
|
||
|
rc = pn533_send_cmd_direct_async(dev,
|
||
|
PN533_CMD_IN_DATA_EXCHANGE,
|
||
|
skb,
|
||
|
pn533_data_exchange_complete,
|
||
|
dev->cmd_complete_mi_arg);
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (rc == 0) /* success */
|
||
|
return;
|
||
|
|
||
|
nfc_err(dev->dev,
|
||
|
"Error %d when trying to perform data_exchange\n", rc);
|
||
|
|
||
|
dev_kfree_skb(skb);
|
||
|
kfree(dev->cmd_complete_mi_arg);
|
||
|
|
||
|
error:
|
||
|
dev->phy_ops->send_ack(dev, GFP_KERNEL);
|
||
|
queue_work(dev->wq, &dev->cmd_work);
|
||
|
}
|
||
|
|
||
|
static void pn533_wq_mi_send(struct work_struct *work)
|
||
|
{
|
||
|
struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
|
||
|
struct sk_buff *skb;
|
||
|
int rc;
|
||
|
|
||
|
/* Grab the first skb in the queue */
|
||
|
skb = skb_dequeue(&dev->fragment_skb);
|
||
|
|
||
|
if (skb == NULL) { /* No more data */
|
||
|
/* Reset the queue for future use */
|
||
|
skb_queue_head_init(&dev->fragment_skb);
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
switch (dev->device_type) {
|
||
|
case PN533_DEVICE_PASORI:
|
||
|
if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
|
||
|
rc = -EIO;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
|
||
|
skb,
|
||
|
pn533_data_exchange_complete,
|
||
|
dev->cmd_complete_dep_arg);
|
||
|
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
/* Still some fragments? */
|
||
|
rc = pn533_send_cmd_direct_async(dev,
|
||
|
PN533_CMD_IN_DATA_EXCHANGE,
|
||
|
skb,
|
||
|
pn533_data_exchange_complete,
|
||
|
dev->cmd_complete_dep_arg);
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (rc == 0) /* success */
|
||
|
return;
|
||
|
|
||
|
nfc_err(dev->dev,
|
||
|
"Error %d when trying to perform data_exchange\n", rc);
|
||
|
|
||
|
dev_kfree_skb(skb);
|
||
|
kfree(dev->cmd_complete_dep_arg);
|
||
|
|
||
|
error:
|
||
|
dev->phy_ops->send_ack(dev, GFP_KERNEL);
|
||
|
queue_work(dev->wq, &dev->cmd_work);
|
||
|
}
|
||
|
|
||
|
static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
|
||
|
u8 cfgdata_len)
|
||
|
{
|
||
|
struct sk_buff *skb;
|
||
|
struct sk_buff *resp;
|
||
|
int skb_len;
|
||
|
|
||
|
skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, skb_len);
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
skb_put_u8(skb, cfgitem);
|
||
|
skb_put_data(skb, cfgdata, cfgdata_len);
|
||
|
|
||
|
resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int pn533_get_firmware_version(struct pn533 *dev,
|
||
|
struct pn533_fw_version *fv)
|
||
|
{
|
||
|
struct sk_buff *skb;
|
||
|
struct sk_buff *resp;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, 0);
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
fv->ic = resp->data[0];
|
||
|
fv->ver = resp->data[1];
|
||
|
fv->rev = resp->data[2];
|
||
|
fv->support = resp->data[3];
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int pn533_pasori_fw_reset(struct pn533 *dev)
|
||
|
{
|
||
|
struct sk_buff *skb;
|
||
|
struct sk_buff *resp;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, sizeof(u8));
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
skb_put_u8(skb, 0x1);
|
||
|
|
||
|
resp = pn533_send_cmd_sync(dev, 0x18, skb);
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
u8 rf_field = !!rf;
|
||
|
int rc;
|
||
|
|
||
|
rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
|
||
|
|
||
|
rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
|
||
|
(u8 *)&rf_field, 1);
|
||
|
if (rc) {
|
||
|
nfc_err(dev->dev, "Error on setting RF field\n");
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
struct sk_buff *skb;
|
||
|
struct sk_buff *resp;
|
||
|
|
||
|
skb = pn533_alloc_skb(dev, 1);
|
||
|
if (!skb)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
skb_put_u8(skb, 0x01);
|
||
|
|
||
|
resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
|
||
|
if (IS_ERR(resp))
|
||
|
return PTR_ERR(resp);
|
||
|
|
||
|
dev_kfree_skb(resp);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int pn533_dev_up(struct nfc_dev *nfc_dev)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
int rc;
|
||
|
|
||
|
if (dev->phy_ops->dev_up) {
|
||
|
rc = dev->phy_ops->dev_up(dev);
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
if ((dev->device_type == PN533_DEVICE_PN532) ||
|
||
|
(dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
|
||
|
rc = pn532_sam_configuration(nfc_dev);
|
||
|
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
return pn533_rf_field(nfc_dev, 1);
|
||
|
}
|
||
|
|
||
|
static int pn533_dev_down(struct nfc_dev *nfc_dev)
|
||
|
{
|
||
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
||
|
int ret;
|
||
|
|
||
|
ret = pn533_rf_field(nfc_dev, 0);
|
||
|
if (dev->phy_ops->dev_down && !ret)
|
||
|
ret = dev->phy_ops->dev_down(dev);
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static const struct nfc_ops pn533_nfc_ops = {
|
||
|
.dev_up = pn533_dev_up,
|
||
|
.dev_down = pn533_dev_down,
|
||
|
.dep_link_up = pn533_dep_link_up,
|
||
|
.dep_link_down = pn533_dep_link_down,
|
||
|
.start_poll = pn533_start_poll,
|
||
|
.stop_poll = pn533_stop_poll,
|
||
|
.activate_target = pn533_activate_target,
|
||
|
.deactivate_target = pn533_deactivate_target,
|
||
|
.im_transceive = pn533_transceive,
|
||
|
.tm_send = pn533_tm_send,
|
||
|
};
|
||
|
|
||
|
static int pn533_setup(struct pn533 *dev)
|
||
|
{
|
||
|
struct pn533_config_max_retries max_retries;
|
||
|
struct pn533_config_timing timing;
|
||
|
u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
|
||
|
int rc;
|
||
|
|
||
|
switch (dev->device_type) {
|
||
|
case PN533_DEVICE_STD:
|
||
|
case PN533_DEVICE_PASORI:
|
||
|
case PN533_DEVICE_ACR122U:
|
||
|
case PN533_DEVICE_PN532:
|
||
|
case PN533_DEVICE_PN532_AUTOPOLL:
|
||
|
max_retries.mx_rty_atr = 0x2;
|
||
|
max_retries.mx_rty_psl = 0x1;
|
||
|
max_retries.mx_rty_passive_act =
|
||
|
PN533_CONFIG_MAX_RETRIES_NO_RETRY;
|
||
|
|
||
|
timing.rfu = PN533_CONFIG_TIMING_102;
|
||
|
timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
|
||
|
timing.dep_timeout = PN533_CONFIG_TIMING_204;
|
||
|
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
nfc_err(dev->dev, "Unknown device type %d\n",
|
||
|
dev->device_type);
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
|
||
|
(u8 *)&max_retries, sizeof(max_retries));
|
||
|
if (rc) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Error on setting MAX_RETRIES config\n");
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
|
||
|
rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
|
||
|
(u8 *)&timing, sizeof(timing));
|
||
|
if (rc) {
|
||
|
nfc_err(dev->dev, "Error on setting RF timings\n");
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
switch (dev->device_type) {
|
||
|
case PN533_DEVICE_STD:
|
||
|
case PN533_DEVICE_PN532:
|
||
|
case PN533_DEVICE_PN532_AUTOPOLL:
|
||
|
break;
|
||
|
|
||
|
case PN533_DEVICE_PASORI:
|
||
|
pn533_pasori_fw_reset(dev);
|
||
|
|
||
|
rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
|
||
|
pasori_cfg, 3);
|
||
|
if (rc) {
|
||
|
nfc_err(dev->dev,
|
||
|
"Error while settings PASORI config\n");
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
pn533_pasori_fw_reset(dev);
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int pn533_finalize_setup(struct pn533 *dev)
|
||
|
{
|
||
|
|
||
|
struct pn533_fw_version fw_ver;
|
||
|
int rc;
|
||
|
|
||
|
memset(&fw_ver, 0, sizeof(fw_ver));
|
||
|
|
||
|
rc = pn533_get_firmware_version(dev, &fw_ver);
|
||
|
if (rc) {
|
||
|
nfc_err(dev->dev, "Unable to get FW version\n");
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
|
||
|
fw_ver.ic, fw_ver.ver, fw_ver.rev);
|
||
|
|
||
|
rc = pn533_setup(dev);
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(pn533_finalize_setup);
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
struct pn533 *priv;
|
||
|
|
||
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||
|
if (!priv)
|
||
|
return ERR_PTR(-ENOMEM);
|
||
|
|
||
|
priv->phy = phy;
|
||
|
priv->phy_ops = phy_ops;
|
||
|
priv->dev = dev;
|
||
|
if (fops != NULL)
|
||
|
priv->ops = fops;
|
||
|
else
|
||
|
priv->ops = &pn533_std_frame_ops;
|
||
|
|
||
|
priv->protocol_type = protocol_type;
|
||
|
priv->device_type = device_type;
|
||
|
|
||
|
mutex_init(&priv->cmd_lock);
|
||
|
|
||
|
INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
|
||
|
INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
|
||
|
INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
|
||
|
INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
|
||
|
INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
|
||
|
INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
|
||
|
INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
|
||
|
INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
|
||
|
INIT_WORK(&priv->rf_work, pn533_wq_rf);
|
||
|
priv->wq = alloc_ordered_workqueue("pn533", 0);
|
||
|
if (priv->wq == NULL)
|
||
|
goto error;
|
||
|
|
||
|
timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
|
||
|
|
||
|
skb_queue_head_init(&priv->resp_q);
|
||
|
skb_queue_head_init(&priv->fragment_skb);
|
||
|
|
||
|
INIT_LIST_HEAD(&priv->cmd_queue);
|
||
|
return priv;
|
||
|
|
||
|
error:
|
||
|
kfree(priv);
|
||
|
return ERR_PTR(-ENOMEM);
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(pn53x_common_init);
|
||
|
|
||
|
void pn53x_common_clean(struct pn533 *priv)
|
||
|
{
|
||
|
struct pn533_cmd *cmd, *n;
|
||
|
|
||
|
/* delete the timer before cleanup the worker */
|
||
|
del_timer_sync(&priv->listen_timer);
|
||
|
|
||
|
flush_delayed_work(&priv->poll_work);
|
||
|
destroy_workqueue(priv->wq);
|
||
|
|
||
|
skb_queue_purge(&priv->resp_q);
|
||
|
|
||
|
list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
|
||
|
list_del(&cmd->queue);
|
||
|
kfree(cmd);
|
||
|
}
|
||
|
|
||
|
kfree(priv);
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(pn53x_common_clean);
|
||
|
|
||
|
int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
|
||
|
struct device *parent)
|
||
|
{
|
||
|
priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
|
||
|
priv->ops->tx_header_len +
|
||
|
PN533_CMD_DATAEXCH_HEAD_LEN,
|
||
|
priv->ops->tx_tail_len);
|
||
|
if (!priv->nfc_dev)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
nfc_set_parent_dev(priv->nfc_dev, parent);
|
||
|
nfc_set_drvdata(priv->nfc_dev, priv);
|
||
|
return 0;
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
|
||
|
|
||
|
int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
|
||
|
struct device *parent)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
|
||
|
if (rc)
|
||
|
return rc;
|
||
|
|
||
|
rc = nfc_register_device(priv->nfc_dev);
|
||
|
if (rc)
|
||
|
nfc_free_device(priv->nfc_dev);
|
||
|
|
||
|
return rc;
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(pn53x_register_nfc);
|
||
|
|
||
|
void pn53x_unregister_nfc(struct pn533 *priv)
|
||
|
{
|
||
|
nfc_unregister_device(priv->nfc_dev);
|
||
|
nfc_free_device(priv->nfc_dev);
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
|
||
|
|
||
|
MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
|
||
|
MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
|
||
|
MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
|
||
|
MODULE_DESCRIPTION("PN533 driver ver " VERSION);
|
||
|
MODULE_VERSION(VERSION);
|
||
|
MODULE_LICENSE("GPL");
|