![Aloisio Almeida Jr](/assets/img/avatar_default.png)
Signed-off-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org> Signed-off-by: Aloisio Almeida Jr <aloisio.almeida@openbossa.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1633 lines
39 KiB
C
1633 lines
39 KiB
C
/*
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* Copyright (C) 2011 Instituto Nokia de Tecnologia
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*
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* Authors:
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* Lauro Ramos Venancio <lauro.venancio@openbossa.org>
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* Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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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/usb.h>
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#include <linux/nfc.h>
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#include <linux/netdevice.h>
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#include <net/nfc.h>
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#define VERSION "0.1"
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#define PN533_VENDOR_ID 0x4CC
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#define PN533_PRODUCT_ID 0x2533
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#define SCM_VENDOR_ID 0x4E6
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#define SCL3711_PRODUCT_ID 0x5591
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static const struct usb_device_id pn533_table[] = {
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{ USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID) },
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{ USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID) },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, pn533_table);
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/* frame definitions */
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#define PN533_FRAME_TAIL_SIZE 2
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#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
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PN533_FRAME_TAIL_SIZE)
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#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
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#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
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#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
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/* start of frame */
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#define PN533_SOF 0x00FF
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/* frame identifier: in/out/error */
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#define PN533_FRAME_IDENTIFIER(f) (f->data[0])
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#define PN533_DIR_OUT 0xD4
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#define PN533_DIR_IN 0xD5
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/* PN533 Commands */
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#define PN533_FRAME_CMD(f) (f->data[1])
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#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
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#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
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#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
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#define PN533_CMD_RF_CONFIGURATION 0x32
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#define PN533_CMD_IN_DATA_EXCHANGE 0x40
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#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
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#define PN533_CMD_IN_ATR 0x50
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#define PN533_CMD_IN_RELEASE 0x52
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#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
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/* PN533 Return codes */
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#define PN533_CMD_RET_MASK 0x3F
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#define PN533_CMD_MI_MASK 0x40
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#define PN533_CMD_RET_SUCCESS 0x00
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struct pn533;
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typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
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u8 *params, int params_len);
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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_MAX_RETRIES 0x05
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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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/* 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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/* Poll modulations */
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enum {
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PN533_POLL_MOD_106KBPS_A,
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PN533_POLL_MOD_212KBPS_FELICA,
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PN533_POLL_MOD_424KBPS_FELICA,
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PN533_POLL_MOD_106KBPS_JEWEL,
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PN533_POLL_MOD_847KBPS_B,
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__PN533_POLL_MOD_AFTER_LAST,
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};
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#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
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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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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_NO_SYSTEM_CODE,
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.tsn = 0,
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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_NO_SYSTEM_CODE,
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.tsn = 0,
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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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};
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/* PN533_CMD_IN_ATR */
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struct pn533_cmd_activate_param {
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u8 tg;
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u8 next;
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} __packed;
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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 {
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struct usb_device *udev;
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struct usb_interface *interface;
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struct nfc_dev *nfc_dev;
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struct urb *out_urb;
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int out_maxlen;
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struct pn533_frame *out_frame;
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struct urb *in_urb;
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int in_maxlen;
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struct pn533_frame *in_frame;
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struct tasklet_struct tasklet;
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struct pn533_frame *tklt_in_frame;
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int tklt_in_error;
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pn533_cmd_complete_t cmd_complete;
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void *cmd_complete_arg;
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struct semaphore cmd_lock;
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u8 cmd;
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struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
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u8 poll_mod_count;
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u8 poll_mod_curr;
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u32 poll_protocols;
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u8 tgt_available_prots;
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u8 tgt_active_prot;
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};
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struct pn533_frame {
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u8 preamble;
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__be16 start_frame;
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u8 datalen;
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u8 datalen_checksum;
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u8 data[];
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} __packed;
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/* The rule: value + checksum = 0 */
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static inline u8 pn533_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_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_checksum(sum);
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}
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/**
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* pn533_tx_frame_ack - create a ack frame
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* @frame: The frame to be set as ack
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*
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* Ack is different type of standard frame. As a standard frame, it has
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* preamble and start_frame. However the checksum of this frame must fail,
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* i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
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* fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
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* After datalen_checksum field, the postamble is placed.
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*/
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static void pn533_tx_frame_ack(struct pn533_frame *frame)
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{
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frame->preamble = 0;
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frame->start_frame = cpu_to_be16(PN533_SOF);
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frame->datalen = 0;
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frame->datalen_checksum = 0xFF;
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/* data[0] is used as postamble */
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frame->data[0] = 0;
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}
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static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
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{
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frame->preamble = 0;
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frame->start_frame = cpu_to_be16(PN533_SOF);
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PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
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PN533_FRAME_CMD(frame) = cmd;
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frame->datalen = 2;
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}
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static void pn533_tx_frame_finish(struct pn533_frame *frame)
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{
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frame->datalen_checksum = pn533_checksum(frame->datalen);
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PN533_FRAME_CHECKSUM(frame) =
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pn533_data_checksum(frame->data, frame->datalen);
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PN533_FRAME_POSTAMBLE(frame) = 0;
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}
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static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
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{
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u8 checksum;
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if (frame->start_frame != cpu_to_be16(PN533_SOF))
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return false;
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checksum = pn533_checksum(frame->datalen);
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if (checksum != frame->datalen_checksum)
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return false;
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checksum = pn533_data_checksum(frame->data, frame->datalen);
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if (checksum != PN533_FRAME_CHECKSUM(frame))
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return false;
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return true;
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}
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static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
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{
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if (frame->start_frame != cpu_to_be16(PN533_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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static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
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{
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return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
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}
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static void pn533_tasklet_cmd_complete(unsigned long arg)
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{
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struct pn533 *dev = (struct pn533 *) arg;
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struct pn533_frame *in_frame = dev->tklt_in_frame;
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int rc;
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if (dev->tklt_in_error)
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rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
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dev->tklt_in_error);
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else
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rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
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PN533_FRAME_CMD_PARAMS_PTR(in_frame),
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PN533_FRAME_CMD_PARAMS_LEN(in_frame));
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if (rc != -EINPROGRESS)
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up(&dev->cmd_lock);
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}
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static void pn533_recv_response(struct urb *urb)
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{
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struct pn533 *dev = urb->context;
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struct pn533_frame *in_frame;
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dev->tklt_in_frame = NULL;
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switch (urb->status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
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" status: %d", urb->status);
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dev->tklt_in_error = urb->status;
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goto sched_tasklet;
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default:
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nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
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" %d", urb->status);
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dev->tklt_in_error = urb->status;
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goto sched_tasklet;
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}
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in_frame = dev->in_urb->transfer_buffer;
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if (!pn533_rx_frame_is_valid(in_frame)) {
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nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
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dev->tklt_in_error = -EIO;
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goto sched_tasklet;
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}
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if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
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nfc_dev_err(&dev->interface->dev, "The received frame is not "
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"response to the last command");
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dev->tklt_in_error = -EIO;
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goto sched_tasklet;
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}
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nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
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dev->tklt_in_error = 0;
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dev->tklt_in_frame = in_frame;
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sched_tasklet:
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tasklet_schedule(&dev->tasklet);
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}
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static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
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{
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dev->in_urb->complete = pn533_recv_response;
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return usb_submit_urb(dev->in_urb, flags);
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}
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static void pn533_recv_ack(struct urb *urb)
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{
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struct pn533 *dev = urb->context;
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struct pn533_frame *in_frame;
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int rc;
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switch (urb->status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
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" status: %d", urb->status);
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dev->tklt_in_error = urb->status;
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goto sched_tasklet;
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default:
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nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
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" %d", urb->status);
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dev->tklt_in_error = urb->status;
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goto sched_tasklet;
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}
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in_frame = dev->in_urb->transfer_buffer;
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|
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if (!pn533_rx_frame_is_ack(in_frame)) {
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nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
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dev->tklt_in_error = -EIO;
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goto sched_tasklet;
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}
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nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
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|
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rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
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if (rc) {
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nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
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" result %d", rc);
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dev->tklt_in_error = rc;
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goto sched_tasklet;
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}
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return;
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|
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sched_tasklet:
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dev->tklt_in_frame = NULL;
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tasklet_schedule(&dev->tasklet);
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}
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|
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static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
|
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{
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dev->in_urb->complete = pn533_recv_ack;
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|
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return usb_submit_urb(dev->in_urb, flags);
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}
|
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|
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static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
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{
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int rc;
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|
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nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
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|
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pn533_tx_frame_ack(dev->out_frame);
|
|
|
|
dev->out_urb->transfer_buffer = dev->out_frame;
|
|
dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
|
|
rc = usb_submit_urb(dev->out_urb, flags);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int __pn533_send_cmd_frame_async(struct pn533 *dev,
|
|
struct pn533_frame *out_frame,
|
|
struct pn533_frame *in_frame,
|
|
int in_frame_len,
|
|
pn533_cmd_complete_t cmd_complete,
|
|
void *arg, gfp_t flags)
|
|
{
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
|
|
PN533_FRAME_CMD(out_frame));
|
|
|
|
dev->cmd = PN533_FRAME_CMD(out_frame);
|
|
dev->cmd_complete = cmd_complete;
|
|
dev->cmd_complete_arg = arg;
|
|
|
|
dev->out_urb->transfer_buffer = out_frame;
|
|
dev->out_urb->transfer_buffer_length =
|
|
PN533_FRAME_SIZE(out_frame);
|
|
|
|
dev->in_urb->transfer_buffer = in_frame;
|
|
dev->in_urb->transfer_buffer_length = in_frame_len;
|
|
|
|
rc = usb_submit_urb(dev->out_urb, flags);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = pn533_submit_urb_for_ack(dev, flags);
|
|
if (rc)
|
|
goto error;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
usb_unlink_urb(dev->out_urb);
|
|
return rc;
|
|
}
|
|
|
|
static int pn533_send_cmd_frame_async(struct pn533 *dev,
|
|
struct pn533_frame *out_frame,
|
|
struct pn533_frame *in_frame,
|
|
int in_frame_len,
|
|
pn533_cmd_complete_t cmd_complete,
|
|
void *arg, gfp_t flags)
|
|
{
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
if (down_trylock(&dev->cmd_lock))
|
|
return -EBUSY;
|
|
|
|
rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
|
|
in_frame_len, cmd_complete, arg, flags);
|
|
if (rc)
|
|
goto error;
|
|
|
|
return 0;
|
|
error:
|
|
up(&dev->cmd_lock);
|
|
return rc;
|
|
}
|
|
|
|
struct pn533_sync_cmd_response {
|
|
int rc;
|
|
struct completion done;
|
|
};
|
|
|
|
static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
|
|
u8 *params, int params_len)
|
|
{
|
|
struct pn533_sync_cmd_response *arg = _arg;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
arg->rc = 0;
|
|
|
|
if (params_len < 0) /* error */
|
|
arg->rc = params_len;
|
|
|
|
complete(&arg->done);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pn533_send_cmd_frame_sync(struct pn533 *dev,
|
|
struct pn533_frame *out_frame,
|
|
struct pn533_frame *in_frame,
|
|
int in_frame_len)
|
|
{
|
|
int rc;
|
|
struct pn533_sync_cmd_response arg;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
init_completion(&arg.done);
|
|
|
|
rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
|
|
pn533_sync_cmd_complete, &arg, GFP_KERNEL);
|
|
if (rc)
|
|
return rc;
|
|
|
|
wait_for_completion(&arg.done);
|
|
|
|
return arg.rc;
|
|
}
|
|
|
|
static void pn533_send_complete(struct urb *urb)
|
|
{
|
|
struct pn533 *dev = urb->context;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
switch (urb->status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
|
|
" status: %d", urb->status);
|
|
break;
|
|
default:
|
|
nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
|
|
" %d", urb->status);
|
|
}
|
|
}
|
|
|
|
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 lenght 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;
|
|
|
|
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;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct pn533_target_felica {
|
|
u8 pol_res;
|
|
u8 opcode;
|
|
u8 nfcid2[8];
|
|
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;
|
|
|
|
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);
|
|
|
|
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_MASK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct pn533_poll_response {
|
|
u8 nbtg;
|
|
u8 tg;
|
|
u8 target_data[];
|
|
} __packed;
|
|
|
|
static int pn533_target_found(struct pn533 *dev,
|
|
struct pn533_poll_response *resp, int resp_len)
|
|
{
|
|
int target_data_len;
|
|
struct nfc_target nfc_tgt;
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
|
|
dev->poll_mod_curr);
|
|
|
|
if (resp->tg != 1)
|
|
return -EPROTO;
|
|
|
|
target_data_len = resp_len - sizeof(struct pn533_poll_response);
|
|
|
|
switch (dev->poll_mod_curr) {
|
|
case PN533_POLL_MOD_106KBPS_A:
|
|
rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
|
|
target_data_len);
|
|
break;
|
|
case PN533_POLL_MOD_212KBPS_FELICA:
|
|
case PN533_POLL_MOD_424KBPS_FELICA:
|
|
rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
|
|
target_data_len);
|
|
break;
|
|
case PN533_POLL_MOD_106KBPS_JEWEL:
|
|
rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
|
|
target_data_len);
|
|
break;
|
|
case PN533_POLL_MOD_847KBPS_B:
|
|
rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
|
|
target_data_len);
|
|
break;
|
|
default:
|
|
nfc_dev_err(&dev->interface->dev, "Unknown current poll"
|
|
" modulation");
|
|
return -EPROTO;
|
|
}
|
|
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
|
|
nfc_dev_dbg(&dev->interface->dev, "The target found does not"
|
|
" have the desired protocol");
|
|
return -EAGAIN;
|
|
}
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
|
|
"0x%x", nfc_tgt.supported_protocols);
|
|
|
|
dev->tgt_available_prots = nfc_tgt.supported_protocols;
|
|
|
|
nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 protocols)
|
|
{
|
|
pn533_poll_reset_mod_list(dev);
|
|
|
|
if (protocols & NFC_PROTO_MIFARE_MASK
|
|
|| protocols & NFC_PROTO_ISO14443_MASK
|
|
|| protocols & NFC_PROTO_NFC_DEP_MASK)
|
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
|
|
|
|
if (protocols & NFC_PROTO_FELICA_MASK
|
|
|| 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 (protocols & NFC_PROTO_JEWEL_MASK)
|
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
|
|
|
|
if (protocols & NFC_PROTO_ISO14443_MASK)
|
|
pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
|
|
}
|
|
|
|
static void pn533_start_poll_frame(struct pn533_frame *frame,
|
|
struct pn533_poll_modulations *mod)
|
|
{
|
|
|
|
pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
|
|
|
|
memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
|
|
frame->datalen += mod->len;
|
|
|
|
pn533_tx_frame_finish(frame);
|
|
}
|
|
|
|
static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
|
|
u8 *params, int params_len)
|
|
{
|
|
struct pn533_poll_response *resp;
|
|
struct pn533_poll_modulations *next_mod;
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
if (params_len == -ENOENT) {
|
|
nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
|
|
" stopped");
|
|
goto stop_poll;
|
|
}
|
|
|
|
if (params_len < 0) {
|
|
nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
|
|
params_len);
|
|
goto stop_poll;
|
|
}
|
|
|
|
resp = (struct pn533_poll_response *) params;
|
|
if (resp->nbtg) {
|
|
rc = pn533_target_found(dev, resp, params_len);
|
|
|
|
/* We must stop the poll after a valid target found */
|
|
if (rc == 0)
|
|
goto stop_poll;
|
|
|
|
if (rc != -EAGAIN)
|
|
nfc_dev_err(&dev->interface->dev, "The target found is"
|
|
" not valid - continuing to poll");
|
|
}
|
|
|
|
dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
|
|
|
|
next_mod = dev->poll_mod_active[dev->poll_mod_curr];
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
|
|
dev->poll_mod_curr);
|
|
|
|
pn533_start_poll_frame(dev->out_frame, next_mod);
|
|
|
|
/* Don't need to down the semaphore again */
|
|
rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
|
|
dev->in_maxlen, pn533_start_poll_complete,
|
|
NULL, GFP_ATOMIC);
|
|
|
|
if (rc == -EPERM) {
|
|
nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
|
|
" because poll has been stopped");
|
|
goto stop_poll;
|
|
}
|
|
|
|
if (rc) {
|
|
nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
|
|
" next modulation", rc);
|
|
goto stop_poll;
|
|
}
|
|
|
|
/* Inform caller function to do not up the semaphore */
|
|
return -EINPROGRESS;
|
|
|
|
stop_poll:
|
|
pn533_poll_reset_mod_list(dev);
|
|
dev->poll_protocols = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
|
|
{
|
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
|
struct pn533_poll_modulations *start_mod;
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
|
|
protocols);
|
|
|
|
if (dev->poll_mod_count) {
|
|
nfc_dev_err(&dev->interface->dev, "Polling operation already"
|
|
" active");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (dev->tgt_active_prot) {
|
|
nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
|
|
" already activated");
|
|
return -EBUSY;
|
|
}
|
|
|
|
pn533_poll_create_mod_list(dev, protocols);
|
|
|
|
if (!dev->poll_mod_count) {
|
|
nfc_dev_err(&dev->interface->dev, "No valid protocols"
|
|
" specified");
|
|
rc = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
|
|
dev->poll_mod_count);
|
|
|
|
dev->poll_mod_curr = 0;
|
|
start_mod = dev->poll_mod_active[dev->poll_mod_curr];
|
|
|
|
pn533_start_poll_frame(dev->out_frame, start_mod);
|
|
|
|
rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
|
|
dev->in_maxlen, pn533_start_poll_complete,
|
|
NULL, GFP_KERNEL);
|
|
|
|
if (rc) {
|
|
nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
|
|
" start poll", rc);
|
|
goto error;
|
|
}
|
|
|
|
dev->poll_protocols = protocols;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
pn533_poll_reset_mod_list(dev);
|
|
return rc;
|
|
}
|
|
|
|
static void pn533_stop_poll(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
if (!dev->poll_mod_count) {
|
|
nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
|
|
" running");
|
|
return;
|
|
}
|
|
|
|
/* An ack will cancel the last issued command (poll) */
|
|
pn533_send_ack(dev, GFP_KERNEL);
|
|
|
|
/* prevent pn533_start_poll_complete to issue a new poll meanwhile */
|
|
usb_kill_urb(dev->in_urb);
|
|
}
|
|
|
|
static int pn533_activate_target_nfcdep(struct pn533 *dev)
|
|
{
|
|
struct pn533_cmd_activate_param param;
|
|
struct pn533_cmd_activate_response *resp;
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
|
|
|
|
param.tg = 1;
|
|
param.next = 0;
|
|
memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), ¶m,
|
|
sizeof(struct pn533_cmd_activate_param));
|
|
dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
|
|
|
|
pn533_tx_frame_finish(dev->out_frame);
|
|
|
|
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
|
|
dev->in_maxlen);
|
|
if (rc)
|
|
return rc;
|
|
|
|
resp = (struct pn533_cmd_activate_response *)
|
|
PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
|
|
rc = resp->status & PN533_CMD_RET_MASK;
|
|
if (rc != PN533_CMD_RET_SUCCESS)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
|
|
u32 protocol)
|
|
{
|
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
|
|
protocol);
|
|
|
|
if (dev->poll_mod_count) {
|
|
nfc_dev_err(&dev->interface->dev, "Cannot activate while"
|
|
" polling");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (dev->tgt_active_prot) {
|
|
nfc_dev_err(&dev->interface->dev, "There is already an active"
|
|
" target");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (!dev->tgt_available_prots) {
|
|
nfc_dev_err(&dev->interface->dev, "There is no available target"
|
|
" to activate");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!(dev->tgt_available_prots & (1 << protocol))) {
|
|
nfc_dev_err(&dev->interface->dev, "The target does not support"
|
|
" the requested protocol %u", protocol);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (protocol == NFC_PROTO_NFC_DEP) {
|
|
rc = pn533_activate_target_nfcdep(dev);
|
|
if (rc) {
|
|
nfc_dev_err(&dev->interface->dev, "Error %d when"
|
|
" activating target with"
|
|
" NFC_DEP protocol", rc);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
dev->tgt_active_prot = protocol;
|
|
dev->tgt_available_prots = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx)
|
|
{
|
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
|
u8 tg;
|
|
u8 status;
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
if (!dev->tgt_active_prot) {
|
|
nfc_dev_err(&dev->interface->dev, "There is no active target");
|
|
return;
|
|
}
|
|
|
|
dev->tgt_active_prot = 0;
|
|
|
|
pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
|
|
|
|
tg = 1;
|
|
memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
|
|
dev->out_frame->datalen += sizeof(u8);
|
|
|
|
pn533_tx_frame_finish(dev->out_frame);
|
|
|
|
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
|
|
dev->in_maxlen);
|
|
if (rc) {
|
|
nfc_dev_err(&dev->interface->dev, "Error when sending release"
|
|
" command to the controller");
|
|
return;
|
|
}
|
|
|
|
status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
|
|
rc = status & PN533_CMD_RET_MASK;
|
|
if (rc != PN533_CMD_RET_SUCCESS)
|
|
nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
|
|
" the target", rc);
|
|
|
|
return;
|
|
}
|
|
|
|
#define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
|
|
#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
|
|
|
|
static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
|
|
{
|
|
int payload_len = skb->len;
|
|
struct pn533_frame *out_frame;
|
|
struct sk_buff *discarded;
|
|
u8 tg;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
|
|
payload_len);
|
|
|
|
if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
|
|
/* TODO: Implement support to multi-part data exchange */
|
|
nfc_dev_err(&dev->interface->dev, "Data length greater than the"
|
|
" max allowed: %d",
|
|
PN533_CMD_DATAEXCH_DATA_MAXLEN);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/* Reserving header space */
|
|
if (skb_cow_head(skb, PN533_CMD_DATAEXCH_HEAD_LEN)) {
|
|
nfc_dev_err(&dev->interface->dev, "Error to add header data");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Reserving tail space, see pn533_tx_frame_finish */
|
|
if (skb_cow_data(skb, PN533_FRAME_TAIL_SIZE, &discarded) < 0) {
|
|
nfc_dev_err(&dev->interface->dev, "Error to add tail data");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
|
|
out_frame = (struct pn533_frame *) skb->data;
|
|
|
|
pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
|
|
|
|
tg = 1;
|
|
memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
|
|
out_frame->datalen += sizeof(u8);
|
|
|
|
/* The data is already in the out_frame, just update the datalen */
|
|
out_frame->datalen += payload_len;
|
|
|
|
pn533_tx_frame_finish(out_frame);
|
|
skb_put(skb, PN533_FRAME_TAIL_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct pn533_data_exchange_arg {
|
|
struct sk_buff *skb_resp;
|
|
struct sk_buff *skb_out;
|
|
data_exchange_cb_t cb;
|
|
void *cb_context;
|
|
};
|
|
|
|
static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
|
|
u8 *params, int params_len)
|
|
{
|
|
struct pn533_data_exchange_arg *arg = _arg;
|
|
struct sk_buff *skb_resp = arg->skb_resp;
|
|
struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
|
|
int err = 0;
|
|
u8 status;
|
|
u8 cmd_ret;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
dev_kfree_skb_irq(arg->skb_out);
|
|
|
|
if (params_len < 0) { /* error */
|
|
err = params_len;
|
|
goto error;
|
|
}
|
|
|
|
skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
|
|
|
|
status = params[0];
|
|
|
|
cmd_ret = status & PN533_CMD_RET_MASK;
|
|
if (cmd_ret != PN533_CMD_RET_SUCCESS) {
|
|
nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
|
|
" exchanging data", cmd_ret);
|
|
err = -EIO;
|
|
goto error;
|
|
}
|
|
|
|
if (status & PN533_CMD_MI_MASK) {
|
|
/* TODO: Implement support to multi-part data exchange */
|
|
nfc_dev_err(&dev->interface->dev, "Multi-part message not yet"
|
|
" supported");
|
|
/* Prevent the other messages from controller */
|
|
pn533_send_ack(dev, GFP_ATOMIC);
|
|
err = -ENOSYS;
|
|
goto error;
|
|
}
|
|
|
|
skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
|
|
skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
|
|
|
|
arg->cb(arg->cb_context, skb_resp, 0);
|
|
kfree(arg);
|
|
return 0;
|
|
|
|
error:
|
|
dev_kfree_skb_irq(skb_resp);
|
|
arg->cb(arg->cb_context, NULL, err);
|
|
kfree(arg);
|
|
return 0;
|
|
}
|
|
|
|
int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx,
|
|
struct sk_buff *skb,
|
|
data_exchange_cb_t cb,
|
|
void *cb_context)
|
|
{
|
|
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
|
|
struct pn533_frame *out_frame, *in_frame;
|
|
struct pn533_data_exchange_arg *arg;
|
|
struct sk_buff *skb_resp;
|
|
int skb_resp_len;
|
|
int rc;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
if (!dev->tgt_active_prot) {
|
|
nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
|
|
" there is no active target");
|
|
rc = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
rc = pn533_data_exchange_tx_frame(dev, skb);
|
|
if (rc)
|
|
goto error;
|
|
|
|
skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
|
|
PN533_CMD_DATAEXCH_DATA_MAXLEN +
|
|
PN533_FRAME_TAIL_SIZE;
|
|
|
|
skb_resp = nfc_alloc_skb(skb_resp_len, GFP_KERNEL);
|
|
if (!skb_resp) {
|
|
rc = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
in_frame = (struct pn533_frame *) skb_resp->data;
|
|
out_frame = (struct pn533_frame *) skb->data;
|
|
|
|
arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
|
|
if (!arg) {
|
|
rc = -ENOMEM;
|
|
goto free_skb_resp;
|
|
}
|
|
|
|
arg->skb_resp = skb_resp;
|
|
arg->skb_out = skb;
|
|
arg->cb = cb;
|
|
arg->cb_context = cb_context;
|
|
|
|
rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
|
|
pn533_data_exchange_complete, arg,
|
|
GFP_KERNEL);
|
|
if (rc) {
|
|
nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
|
|
" perform data_exchange", rc);
|
|
goto free_arg;
|
|
}
|
|
|
|
return 0;
|
|
|
|
free_arg:
|
|
kfree(arg);
|
|
free_skb_resp:
|
|
kfree_skb(skb_resp);
|
|
error:
|
|
kfree_skb(skb);
|
|
return rc;
|
|
}
|
|
|
|
static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
|
|
u8 cfgdata_len)
|
|
{
|
|
int rc;
|
|
u8 *params;
|
|
|
|
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
|
|
|
|
pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
|
|
|
|
params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
|
|
params[0] = cfgitem;
|
|
memcpy(¶ms[1], cfgdata, cfgdata_len);
|
|
dev->out_frame->datalen += (1 + cfgdata_len);
|
|
|
|
pn533_tx_frame_finish(dev->out_frame);
|
|
|
|
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
|
|
dev->in_maxlen);
|
|
|
|
return rc;
|
|
}
|
|
|
|
struct nfc_ops pn533_nfc_ops = {
|
|
.start_poll = pn533_start_poll,
|
|
.stop_poll = pn533_stop_poll,
|
|
.activate_target = pn533_activate_target,
|
|
.deactivate_target = pn533_deactivate_target,
|
|
.data_exchange = pn533_data_exchange,
|
|
};
|
|
|
|
static int pn533_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct pn533_fw_version *fw_ver;
|
|
struct pn533 *dev;
|
|
struct usb_host_interface *iface_desc;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
struct pn533_config_max_retries max_retries;
|
|
int in_endpoint = 0;
|
|
int out_endpoint = 0;
|
|
int rc = -ENOMEM;
|
|
int i;
|
|
u32 protocols;
|
|
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->udev = usb_get_dev(interface_to_usbdev(interface));
|
|
dev->interface = interface;
|
|
sema_init(&dev->cmd_lock, 1);
|
|
|
|
iface_desc = interface->cur_altsetting;
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
|
|
if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
|
|
dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
in_endpoint = endpoint->bEndpointAddress;
|
|
}
|
|
|
|
if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
|
|
dev->out_maxlen =
|
|
le16_to_cpu(endpoint->wMaxPacketSize);
|
|
out_endpoint = endpoint->bEndpointAddress;
|
|
}
|
|
}
|
|
|
|
if (!in_endpoint || !out_endpoint) {
|
|
nfc_dev_err(&interface->dev, "Could not find bulk-in or"
|
|
" bulk-out endpoint");
|
|
rc = -ENODEV;
|
|
goto error;
|
|
}
|
|
|
|
dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
|
|
dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
|
|
dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
|
|
if (!dev->in_frame || !dev->out_frame ||
|
|
!dev->in_urb || !dev->out_urb)
|
|
goto error;
|
|
|
|
usb_fill_bulk_urb(dev->in_urb, dev->udev,
|
|
usb_rcvbulkpipe(dev->udev, in_endpoint),
|
|
NULL, 0, NULL, dev);
|
|
usb_fill_bulk_urb(dev->out_urb, dev->udev,
|
|
usb_sndbulkpipe(dev->udev, out_endpoint),
|
|
NULL, 0,
|
|
pn533_send_complete, dev);
|
|
|
|
tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev);
|
|
|
|
usb_set_intfdata(interface, dev);
|
|
|
|
pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
|
|
pn533_tx_frame_finish(dev->out_frame);
|
|
|
|
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
|
|
dev->in_maxlen);
|
|
if (rc)
|
|
goto kill_tasklet;
|
|
|
|
fw_ver = (struct pn533_fw_version *)
|
|
PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
|
|
nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
|
|
" attached", fw_ver->ver, fw_ver->rev);
|
|
|
|
protocols = NFC_PROTO_JEWEL_MASK
|
|
| NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
|
|
| NFC_PROTO_ISO14443_MASK
|
|
| NFC_PROTO_NFC_DEP_MASK;
|
|
|
|
dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols);
|
|
if (!dev->nfc_dev)
|
|
goto kill_tasklet;
|
|
|
|
nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
|
|
nfc_set_drvdata(dev->nfc_dev, dev);
|
|
|
|
rc = nfc_register_device(dev->nfc_dev);
|
|
if (rc)
|
|
goto free_nfc_dev;
|
|
|
|
max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
|
|
max_retries.mx_rty_psl = 2;
|
|
max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
|
|
|
|
rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
|
|
(u8 *) &max_retries, sizeof(max_retries));
|
|
|
|
if (rc) {
|
|
nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
|
|
" config");
|
|
goto free_nfc_dev;
|
|
}
|
|
|
|
return 0;
|
|
|
|
free_nfc_dev:
|
|
nfc_free_device(dev->nfc_dev);
|
|
kill_tasklet:
|
|
tasklet_kill(&dev->tasklet);
|
|
error:
|
|
kfree(dev->in_frame);
|
|
usb_free_urb(dev->in_urb);
|
|
kfree(dev->out_frame);
|
|
usb_free_urb(dev->out_urb);
|
|
kfree(dev);
|
|
return rc;
|
|
}
|
|
|
|
static void pn533_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct pn533 *dev;
|
|
|
|
dev = usb_get_intfdata(interface);
|
|
usb_set_intfdata(interface, NULL);
|
|
|
|
nfc_unregister_device(dev->nfc_dev);
|
|
nfc_free_device(dev->nfc_dev);
|
|
|
|
usb_kill_urb(dev->in_urb);
|
|
usb_kill_urb(dev->out_urb);
|
|
|
|
tasklet_kill(&dev->tasklet);
|
|
|
|
kfree(dev->in_frame);
|
|
usb_free_urb(dev->in_urb);
|
|
kfree(dev->out_frame);
|
|
usb_free_urb(dev->out_urb);
|
|
kfree(dev);
|
|
|
|
nfc_dev_info(&dev->interface->dev, "NXP PN533 NFC device disconnected");
|
|
}
|
|
|
|
static struct usb_driver pn533_driver = {
|
|
.name = "pn533",
|
|
.probe = pn533_probe,
|
|
.disconnect = pn533_disconnect,
|
|
.id_table = pn533_table,
|
|
};
|
|
|
|
static int __init pn533_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = usb_register(&pn533_driver);
|
|
if (rc)
|
|
err("usb_register failed. Error number %d", rc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void __exit pn533_exit(void)
|
|
{
|
|
usb_deregister(&pn533_driver);
|
|
}
|
|
|
|
module_init(pn533_init);
|
|
module_exit(pn533_exit);
|
|
|
|
MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
|
|
" Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
|
|
MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
|
|
MODULE_VERSION(VERSION);
|
|
MODULE_LICENSE("GPL");
|