[RFC 3/4] NFC: pn533: Separate pn533 driver in HW dependant and independant parts

From: Michael Thalmeier
Date: Fri Mar 25 2016 - 10:55:59 EST

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The driver now has all core stuff isolated in one file, and all the
hardware link specifics in another. Writing a pn533 driver on top of
another hardware link is now just a matter of adding a new file for that
new hardware specifics.

Signed-off-by: Michael Thalmeier <michael.thalmeier@xxxxxxx>
---
drivers/nfc/Kconfig | 11 +-
drivers/nfc/Makefile | 2 +-
drivers/nfc/pn533.c | 3334 --------------------------------------------
drivers/nfc/pn533/Kconfig | 16 +
drivers/nfc/pn533/Makefile | 7 +
drivers/nfc/pn533/pn533.c | 2652 +++++++++++++++++++++++++++++++++++
drivers/nfc/pn533/pn533.h | 234 ++++
drivers/nfc/pn533/usb.c | 594 ++++++++
8 files changed, 3505 insertions(+), 3345 deletions(-)
delete mode 100644 drivers/nfc/pn533.c
create mode 100644 drivers/nfc/pn533/Kconfig
create mode 100644 drivers/nfc/pn533/Makefile
create mode 100644 drivers/nfc/pn533/pn533.c
create mode 100644 drivers/nfc/pn533/pn533.h
create mode 100644 drivers/nfc/pn533/usb.c

diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
index 7437c9d..ea8321a 100644
--- a/drivers/nfc/Kconfig
+++ b/drivers/nfc/Kconfig
@@ -5,16 +5,6 @@
menu "Near Field Communication (NFC) devices"
depends on NFC

-config NFC_PN533
- tristate "NXP PN533 USB driver"
- depends on USB
- help
- NXP PN533 USB driver.
- This driver provides support for NFC NXP PN533 devices.
-
- Say Y here to compile support for PN533 devices into the
- kernel or say M to compile it as module (pn533).
-
config NFC_WILINK
tristate "Texas Instruments NFC WiLink driver"
depends on TI_ST && NFC_NCI
@@ -70,6 +60,7 @@ config NFC_PORT100

source "drivers/nfc/fdp/Kconfig"
source "drivers/nfc/pn544/Kconfig"
+source "drivers/nfc/pn533/Kconfig"
source "drivers/nfc/microread/Kconfig"
source "drivers/nfc/nfcmrvl/Kconfig"
source "drivers/nfc/st21nfca/Kconfig"
diff --git a/drivers/nfc/Makefile b/drivers/nfc/Makefile
index 0a99e67..bab8ef0 100644
--- a/drivers/nfc/Makefile
+++ b/drivers/nfc/Makefile
@@ -5,7 +5,7 @@
obj-$(CONFIG_NFC_FDP) += fdp/
obj-$(CONFIG_NFC_PN544) += pn544/
obj-$(CONFIG_NFC_MICROREAD) += microread/
-obj-$(CONFIG_NFC_PN533) += pn533.o
+obj-$(CONFIG_NFC_PN533) += pn533/
obj-$(CONFIG_NFC_WILINK) += nfcwilink.o
obj-$(CONFIG_NFC_MEI_PHY) += mei_phy.o
obj-$(CONFIG_NFC_SIM) += nfcsim.o
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
deleted file mode 100644
index 074f1e4..0000000
--- a/drivers/nfc/pn533.c
+++ /dev/null
@@ -1,3334 +0,0 @@
-/*
- * Copyright (C) 2011 Instituto Nokia de Tecnologia
- * Copyright (C) 2012-2013 Tieto Poland
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/nfc.h>
-#include <linux/netdevice.h>
-#include <net/nfc/nfc.h>
-
-#define VERSION "0.2"
-
-#define PN533_VENDOR_ID 0x4CC
-#define PN533_PRODUCT_ID 0x2533
-
-#define SCM_VENDOR_ID 0x4E6
-#define SCL3711_PRODUCT_ID 0x5591
-
-#define SONY_VENDOR_ID 0x054c
-#define PASORI_PRODUCT_ID 0x02e1
-
-#define ACS_VENDOR_ID 0x072f
-#define ACR122U_PRODUCT_ID 0x2200
-
-#define PN533_DEVICE_STD 0x1
-#define PN533_DEVICE_PASORI 0x2
-#define PN533_DEVICE_ACR122U 0x3
-
-#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
- NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
- NFC_PROTO_NFC_DEP_MASK |\
- NFC_PROTO_ISO14443_B_MASK)
-
-#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
- NFC_PROTO_MIFARE_MASK | \
- NFC_PROTO_FELICA_MASK | \
- NFC_PROTO_ISO14443_MASK | \
- NFC_PROTO_NFC_DEP_MASK)
-
-static const struct usb_device_id pn533_table[] = {
- { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID),
- .driver_info = PN533_DEVICE_STD },
- { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID),
- .driver_info = PN533_DEVICE_STD },
- { USB_DEVICE(SONY_VENDOR_ID, PASORI_PRODUCT_ID),
- .driver_info = PN533_DEVICE_PASORI },
- { USB_DEVICE(ACS_VENDOR_ID, ACR122U_PRODUCT_ID),
- .driver_info = PN533_DEVICE_ACR122U },
- { }
-};
-MODULE_DEVICE_TABLE(usb, pn533_table);
-
-/* How much time we spend listening for initiators */
-#define PN533_LISTEN_TIME 2
-/* Delay between each poll frame (ms) */
-#define PN533_POLL_INTERVAL 10
-
-/* Standard pn533 frame definitions (standard and extended)*/
-#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
- + 2) /* data[0] TFI, data[1] CC */
-#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
-
-#define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
- + 2) /* data[0] TFI, data[1] CC */
-
-#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
-#define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */
-
-/*
- * Max extended frame payload len, excluding TFI and CC
- * which are already in PN533_FRAME_HEADER_LEN.
- */
-#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
-
-#define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
- Postamble (1) */
-#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
-#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
-/* Half start code (3), LEN (4) should be 0xffff for extended frame */
-#define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
- && (hdr)->datalen_checksum == 0xFF)
-#define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
-
-/* start of frame */
-#define PN533_STD_FRAME_SOF 0x00FF
-
-/* standard frame identifier: in/out/error */
-#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
-#define PN533_STD_FRAME_DIR_OUT 0xD4
-#define PN533_STD_FRAME_DIR_IN 0xD5
-
-/* ACS ACR122 pn533 frame definitions */
-#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
- + 2)
-#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
-#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
- + 2)
-#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
-#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
-
-/* CCID messages types */
-#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
-#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
-
-#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
-
-/* PN533 Commands */
-#define PN533_FRAME_CMD(f) (f->data[1])
-
-#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
-#define PN533_CMD_RF_CONFIGURATION 0x32
-#define PN533_CMD_IN_DATA_EXCHANGE 0x40
-#define PN533_CMD_IN_COMM_THRU 0x42
-#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
-#define PN533_CMD_IN_ATR 0x50
-#define PN533_CMD_IN_RELEASE 0x52
-#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
-
-#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
-#define PN533_CMD_TG_GET_DATA 0x86
-#define PN533_CMD_TG_SET_DATA 0x8e
-#define PN533_CMD_TG_SET_META_DATA 0x94
-#define PN533_CMD_UNDEF 0xff
-
-#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
-
-/* PN533 Return codes */
-#define PN533_CMD_RET_MASK 0x3F
-#define PN533_CMD_MI_MASK 0x40
-#define PN533_CMD_RET_SUCCESS 0x00
-
-struct pn533;
-
-typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
- struct sk_buff *resp);
-
-/* structs for pn533 commands */
-
-/* PN533_CMD_GET_FIRMWARE_VERSION */
-struct pn533_fw_version {
- u8 ic;
- u8 ver;
- u8 rev;
- u8 support;
-};
-
-/* PN533_CMD_RF_CONFIGURATION */
-#define PN533_CFGITEM_RF_FIELD 0x01
-#define PN533_CFGITEM_TIMING 0x02
-#define PN533_CFGITEM_MAX_RETRIES 0x05
-#define PN533_CFGITEM_PASORI 0x82
-
-#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
-#define PN533_CFGITEM_RF_FIELD_ON 0x1
-#define PN533_CFGITEM_RF_FIELD_OFF 0x0
-
-#define PN533_CONFIG_TIMING_102 0xb
-#define PN533_CONFIG_TIMING_204 0xc
-#define PN533_CONFIG_TIMING_409 0xd
-#define PN533_CONFIG_TIMING_819 0xe
-
-#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
-#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
-
-struct pn533_config_max_retries {
- u8 mx_rty_atr;
- u8 mx_rty_psl;
- u8 mx_rty_passive_act;
-} __packed;
-
-struct pn533_config_timing {
- u8 rfu;
- u8 atr_res_timeout;
- u8 dep_timeout;
-} __packed;
-
-/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
-
-/* felica commands opcode */
-#define PN533_FELICA_OPC_SENSF_REQ 0
-#define PN533_FELICA_OPC_SENSF_RES 1
-/* felica SENSF_REQ parameters */
-#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
-#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
-#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
-#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
-
-/* type B initiator_data values */
-#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
-#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
-#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
-
-union pn533_cmd_poll_initdata {
- struct {
- u8 afi;
- u8 polling_method;
- } __packed type_b;
- struct {
- u8 opcode;
- __be16 sc;
- u8 rc;
- u8 tsn;
- } __packed felica;
-};
-
-/* Poll modulations */
-enum {
- PN533_POLL_MOD_106KBPS_A,
- PN533_POLL_MOD_212KBPS_FELICA,
- PN533_POLL_MOD_424KBPS_FELICA,
- PN533_POLL_MOD_106KBPS_JEWEL,
- PN533_POLL_MOD_847KBPS_B,
- PN533_LISTEN_MOD,
-
- __PN533_POLL_MOD_AFTER_LAST,
-};
-#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
-
-struct pn533_poll_modulations {
- struct {
- u8 maxtg;
- u8 brty;
- union pn533_cmd_poll_initdata initiator_data;
- } __packed data;
- u8 len;
-};
-
-static const struct pn533_poll_modulations poll_mod[] = {
- [PN533_POLL_MOD_106KBPS_A] = {
- .data = {
- .maxtg = 1,
- .brty = 0,
- },
- .len = 2,
- },
- [PN533_POLL_MOD_212KBPS_FELICA] = {
- .data = {
- .maxtg = 1,
- .brty = 1,
- .initiator_data.felica = {
- .opcode = PN533_FELICA_OPC_SENSF_REQ,
- .sc = PN533_FELICA_SENSF_SC_ALL,
- .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
- .tsn = 0x03,
- },
- },
- .len = 7,
- },
- [PN533_POLL_MOD_424KBPS_FELICA] = {
- .data = {
- .maxtg = 1,
- .brty = 2,
- .initiator_data.felica = {
- .opcode = PN533_FELICA_OPC_SENSF_REQ,
- .sc = PN533_FELICA_SENSF_SC_ALL,
- .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
- .tsn = 0x03,
- },
- },
- .len = 7,
- },
- [PN533_POLL_MOD_106KBPS_JEWEL] = {
- .data = {
- .maxtg = 1,
- .brty = 4,
- },
- .len = 2,
- },
- [PN533_POLL_MOD_847KBPS_B] = {
- .data = {
- .maxtg = 1,
- .brty = 8,
- .initiator_data.type_b = {
- .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
- .polling_method =
- PN533_TYPE_B_POLL_METHOD_TIMESLOT,
- },
- },
- .len = 3,
- },
- [PN533_LISTEN_MOD] = {
- .len = 0,
- },
-};
-
-/* PN533_CMD_IN_ATR */
-
-struct pn533_cmd_activate_response {
- u8 status;
- u8 nfcid3t[10];
- u8 didt;
- u8 bst;
- u8 brt;
- u8 to;
- u8 ppt;
- /* optional */
- u8 gt[];
-} __packed;
-
-struct pn533_cmd_jump_dep_response {
- u8 status;
- u8 tg;
- u8 nfcid3t[10];
- u8 didt;
- u8 bst;
- u8 brt;
- u8 to;
- u8 ppt;
- /* optional */
- u8 gt[];
-} __packed;
-
-
-/* PN533_TG_INIT_AS_TARGET */
-#define PN533_INIT_TARGET_PASSIVE 0x1
-#define PN533_INIT_TARGET_DEP 0x2
-
-#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
-#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
-#define PN533_INIT_TARGET_RESP_DEP 0x4
-
-enum pn533_protocol_type {
- PN533_PROTO_REQ_ACK_RESP = 0,
- PN533_PROTO_REQ_RESP
-};
-
-struct pn533 {
- struct usb_device *udev;
- struct usb_interface *interface;
- struct nfc_dev *nfc_dev;
- u32 device_type;
- enum pn533_protocol_type protocol_type;
-
- struct urb *out_urb;
- struct urb *in_urb;
-
- struct sk_buff_head resp_q;
- struct sk_buff_head fragment_skb;
-
- struct workqueue_struct *wq;
- struct work_struct cmd_work;
- struct work_struct cmd_complete_work;
- struct delayed_work poll_work;
- struct work_struct mi_rx_work;
- struct work_struct mi_tx_work;
- struct work_struct mi_tm_rx_work;
- struct work_struct mi_tm_tx_work;
- struct work_struct tg_work;
- struct work_struct rf_work;
-
- struct list_head cmd_queue;
- struct pn533_cmd *cmd;
- u8 cmd_pending;
- struct mutex cmd_lock; /* protects cmd queue */
-
- void *cmd_complete_mi_arg;
- void *cmd_complete_dep_arg;
-
- struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
- u8 poll_mod_count;
- u8 poll_mod_curr;
- u8 poll_dep;
- u32 poll_protocols;
- u32 listen_protocols;
- struct timer_list listen_timer;
- int cancel_listen;
-
- u8 *gb;
- size_t gb_len;
-
- u8 tgt_available_prots;
- u8 tgt_active_prot;
- u8 tgt_mode;
-
- struct pn533_frame_ops *ops;
-};
-
-struct pn533_cmd {
- struct list_head queue;
- u8 code;
- int status;
- struct sk_buff *req;
- struct sk_buff *resp;
- int resp_len;
- pn533_send_async_complete_t complete_cb;
- void *complete_cb_context;
-};
-
-struct pn533_std_frame {
- u8 preamble;
- __be16 start_frame;
- u8 datalen;
- u8 datalen_checksum;
- u8 data[];
-} __packed;
-
-struct pn533_ext_frame { /* Extended Information frame */
- u8 preamble;
- __be16 start_frame;
- __be16 eif_flag; /* fixed to 0xFFFF */
- __be16 datalen;
- u8 datalen_checksum;
- u8 data[];
-} __packed;
-
-struct pn533_frame_ops {
- void (*tx_frame_init)(void *frame, u8 cmd_code);
- void (*tx_frame_finish)(void *frame);
- void (*tx_update_payload_len)(void *frame, int len);
- int tx_header_len;
- int tx_tail_len;
-
- bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
- int (*rx_frame_size)(void *frame);
- int rx_header_len;
- int rx_tail_len;
-
- int max_payload_len;
- u8 (*get_cmd_code)(void *frame);
-};
-
-struct pn533_acr122_ccid_hdr {
- u8 type;
- u32 datalen;
- u8 slot;
- u8 seq;
- u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
- byte for reposnse msg */
- u8 data[]; /* payload */
-} __packed;
-
-struct pn533_acr122_apdu_hdr {
- u8 class;
- u8 ins;
- u8 p1;
- u8 p2;
-} __packed;
-
-struct pn533_acr122_tx_frame {
- struct pn533_acr122_ccid_hdr ccid;
- struct pn533_acr122_apdu_hdr apdu;
- u8 datalen;
- u8 data[]; /* pn533 frame: TFI ... */
-} __packed;
-
-struct pn533_acr122_rx_frame {
- struct pn533_acr122_ccid_hdr ccid;
- u8 data[]; /* pn533 frame : TFI ... */
-} __packed;
-
-static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
-{
- struct pn533_acr122_tx_frame *frame = _frame;
-
- frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
- frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
- sizeof(datalen) */
- frame->ccid.slot = 0;
- frame->ccid.seq = 0;
- frame->ccid.params[0] = 0;
- frame->ccid.params[1] = 0;
- frame->ccid.params[2] = 0;
-
- frame->data[0] = PN533_STD_FRAME_DIR_OUT;
- frame->data[1] = cmd_code;
- frame->datalen = 2; /* data[0] + data[1] */
-
- frame->apdu.class = 0xFF;
- frame->apdu.ins = 0;
- frame->apdu.p1 = 0;
- frame->apdu.p2 = 0;
-}
-
-static void pn533_acr122_tx_frame_finish(void *_frame)
-{
- struct pn533_acr122_tx_frame *frame = _frame;
-
- frame->ccid.datalen += frame->datalen;
-}
-
-static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
-{
- struct pn533_acr122_tx_frame *frame = _frame;
-
- frame->datalen += len;
-}
-
-static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
-{
- struct pn533_acr122_rx_frame *frame = _frame;
-
- if (frame->ccid.type != 0x83)
- return false;
-
- if (!frame->ccid.datalen)
- return false;
-
- if (frame->data[frame->ccid.datalen - 2] == 0x63)
- return false;
-
- return true;
-}
-
-static int pn533_acr122_rx_frame_size(void *frame)
-{
- struct pn533_acr122_rx_frame *f = frame;
-
- /* f->ccid.datalen already includes tail length */
- return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
-}
-
-static u8 pn533_acr122_get_cmd_code(void *frame)
-{
- struct pn533_acr122_rx_frame *f = frame;
-
- return PN533_FRAME_CMD(f);
-}
-
-static struct pn533_frame_ops pn533_acr122_frame_ops = {
- .tx_frame_init = pn533_acr122_tx_frame_init,
- .tx_frame_finish = pn533_acr122_tx_frame_finish,
- .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
- .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
- .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
-
- .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
- .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
- .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
- .rx_frame_size = pn533_acr122_rx_frame_size,
-
- .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
- .get_cmd_code = pn533_acr122_get_cmd_code,
-};
-
-/* The rule: value(high byte) + value(low byte) + checksum = 0 */
-static inline u8 pn533_ext_checksum(u16 value)
-{
- return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
-}
-
-/* The rule: value + checksum = 0 */
-static inline u8 pn533_std_checksum(u8 value)
-{
- return ~value + 1;
-}
-
-/* The rule: sum(data elements) + checksum = 0 */
-static u8 pn533_std_data_checksum(u8 *data, int datalen)
-{
- u8 sum = 0;
- int i;
-
- for (i = 0; i < datalen; i++)
- sum += data[i];
-
- return pn533_std_checksum(sum);
-}
-
-static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
-{
- struct pn533_std_frame *frame = _frame;
-
- frame->preamble = 0;
- frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
- PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
- PN533_FRAME_CMD(frame) = cmd_code;
- frame->datalen = 2;
-}
-
-static void pn533_std_tx_frame_finish(void *_frame)
-{
- struct pn533_std_frame *frame = _frame;
-
- frame->datalen_checksum = pn533_std_checksum(frame->datalen);
-
- PN533_STD_FRAME_CHECKSUM(frame) =
- pn533_std_data_checksum(frame->data, frame->datalen);
-
- PN533_STD_FRAME_POSTAMBLE(frame) = 0;
-}
-
-static void pn533_std_tx_update_payload_len(void *_frame, int len)
-{
- struct pn533_std_frame *frame = _frame;
-
- frame->datalen += len;
-}
-
-static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
-{
- u8 checksum;
- struct pn533_std_frame *stdf = _frame;
-
- if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
- return false;
-
- if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
- /* Standard frame code */
- dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
-
- checksum = pn533_std_checksum(stdf->datalen);
- if (checksum != stdf->datalen_checksum)
- return false;
-
- checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
- if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
- return false;
- } else {
- /* Extended */
- struct pn533_ext_frame *eif = _frame;
-
- dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
-
- checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
- if (checksum != eif->datalen_checksum)
- return false;
-
- /* check data checksum */
- checksum = pn533_std_data_checksum(eif->data,
- be16_to_cpu(eif->datalen));
- if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
- return false;
- }
-
- return true;
-}
-
-static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
-{
- if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
- return false;
-
- if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
- return false;
-
- return true;
-}
-
-static inline int pn533_std_rx_frame_size(void *frame)
-{
- struct pn533_std_frame *f = frame;
-
- /* check for Extended Information frame */
- if (PN533_STD_IS_EXTENDED(f)) {
- struct pn533_ext_frame *eif = frame;
-
- return sizeof(struct pn533_ext_frame)
- + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
- }
-
- return sizeof(struct pn533_std_frame) + f->datalen +
- 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);
-}
-
-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 bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
-{
- return (dev->ops->get_cmd_code(frame) ==
- PN533_CMD_RESPONSE(dev->cmd->code));
-}
-
-static void pn533_recv_response(struct urb *urb)
-{
- struct pn533 *dev = urb->context;
- struct pn533_cmd *cmd = dev->cmd;
- u8 *in_frame;
-
- cmd->status = urb->status;
-
- switch (urb->status) {
- case 0:
- break; /* success */
- case -ECONNRESET:
- case -ENOENT:
- dev_dbg(&dev->interface->dev,
- "The urb has been canceled (status %d)\n",
- urb->status);
- goto sched_wq;
- case -ESHUTDOWN:
- default:
- nfc_err(&dev->interface->dev,
- "Urb failure (status %d)\n", urb->status);
- goto sched_wq;
- }
-
- in_frame = dev->in_urb->transfer_buffer;
-
- dev_dbg(&dev->interface->dev, "Received a frame\n");
- print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
- dev->ops->rx_frame_size(in_frame), false);
-
- if (!dev->ops->rx_is_frame_valid(in_frame, dev)) {
- nfc_err(&dev->interface->dev, "Received an invalid frame\n");
- cmd->status = -EIO;
- goto sched_wq;
- }
-
- if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
- nfc_err(&dev->interface->dev,
- "It it not the response to the last command\n");
- cmd->status = -EIO;
- goto sched_wq;
- }
-
-sched_wq:
- queue_work(dev->wq, &dev->cmd_complete_work);
-}
-
-static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
-{
- dev->in_urb->complete = pn533_recv_response;
-
- return usb_submit_urb(dev->in_urb, flags);
-}
-
-static void pn533_recv_ack(struct urb *urb)
-{
- struct pn533 *dev = urb->context;
- struct pn533_cmd *cmd = dev->cmd;
- struct pn533_std_frame *in_frame;
- int rc;
-
- cmd->status = urb->status;
-
- switch (urb->status) {
- case 0:
- break; /* success */
- case -ECONNRESET:
- case -ENOENT:
- dev_dbg(&dev->interface->dev,
- "The urb has been stopped (status %d)\n",
- urb->status);
- goto sched_wq;
- case -ESHUTDOWN:
- default:
- nfc_err(&dev->interface->dev,
- "Urb failure (status %d)\n", urb->status);
- goto sched_wq;
- }
-
- in_frame = dev->in_urb->transfer_buffer;
-
- if (!pn533_std_rx_frame_is_ack(in_frame)) {
- nfc_err(&dev->interface->dev, "Received an invalid ack\n");
- cmd->status = -EIO;
- goto sched_wq;
- }
-
- rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
- if (rc) {
- nfc_err(&dev->interface->dev,
- "usb_submit_urb failed with result %d\n", rc);
- cmd->status = rc;
- goto sched_wq;
- }
-
- return;
-
-sched_wq:
- queue_work(dev->wq, &dev->cmd_complete_work);
-}
-
-static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
-{
- dev->in_urb->complete = pn533_recv_ack;
-
- return usb_submit_urb(dev->in_urb, flags);
-}
-
-static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
-{
- u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
- /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
- int rc;
-
- dev->out_urb->transfer_buffer = ack;
- dev->out_urb->transfer_buffer_length = sizeof(ack);
- rc = usb_submit_urb(dev->out_urb, flags);
-
- return rc;
-}
-
-static int __pn533_send_frame_async(struct pn533 *dev,
- struct sk_buff *out,
- struct sk_buff *in,
- int in_len)
-{
- int rc;
-
- dev->out_urb->transfer_buffer = out->data;
- dev->out_urb->transfer_buffer_length = out->len;
-
- dev->in_urb->transfer_buffer = in->data;
- dev->in_urb->transfer_buffer_length = in_len;
-
- print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
- out->data, out->len, false);
-
- rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
- if (rc)
- return rc;
-
- if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
- /* request for response for sent packet directly */
- rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
- if (rc)
- goto error;
- } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
- /* request for ACK if that's the case */
- rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
- if (rc)
- goto error;
- }
-
- return 0;
-
-error:
- usb_unlink_urb(dev->out_urb);
- return rc;
-}
-
-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;
- int status = cmd->status;
-
- struct sk_buff *req = cmd->req;
- struct sk_buff *resp = cmd->resp;
-
- int rc;
-
- dev_kfree_skb(req);
-
- if (status < 0) {
- rc = cmd->complete_cb(dev, cmd->complete_cb_context,
- ERR_PTR(status));
- dev_kfree_skb(resp);
- goto done;
- }
-
- skb_put(resp, dev->ops->rx_frame_size(resp->data));
- 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, struct sk_buff *resp,
- int resp_len,
- pn533_send_async_complete_t complete_cb,
- void *complete_cb_context)
-{
- struct pn533_cmd *cmd;
- int rc = 0;
-
- dev_dbg(&dev->interface->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->resp = resp;
- cmd->resp_len = resp_len;
- 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) {
- rc = __pn533_send_frame_async(dev, req, resp, resp_len);
- if (rc)
- goto error;
-
- dev->cmd_pending = 1;
- dev->cmd = cmd;
- goto unlock;
- }
-
- dev_dbg(&dev->interface->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)
-{
- struct sk_buff *resp;
- int rc;
- int resp_len = dev->ops->rx_header_len +
- dev->ops->max_payload_len +
- dev->ops->rx_tail_len;
-
- resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
- if (!resp)
- return -ENOMEM;
-
- rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
- complete_cb_context);
- if (rc)
- dev_kfree_skb(resp);
-
- return rc;
-}
-
-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)
-{
- struct sk_buff *resp;
- int rc;
- int resp_len = dev->ops->rx_header_len +
- dev->ops->max_payload_len +
- dev->ops->rx_tail_len;
-
- resp = alloc_skb(resp_len, GFP_KERNEL);
- if (!resp)
- return -ENOMEM;
-
- rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
- complete_cb_context);
- if (rc)
- dev_kfree_skb(resp);
-
- return rc;
-}
-
-/*
- * pn533_send_cmd_direct_async
- *
- * The function sends a piority cmd directly to the chip omiting 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 sk_buff *resp;
- struct pn533_cmd *cmd;
- int rc;
- int resp_len = dev->ops->rx_header_len +
- dev->ops->max_payload_len +
- dev->ops->rx_tail_len;
-
- resp = alloc_skb(resp_len, GFP_KERNEL);
- if (!resp)
- return -ENOMEM;
-
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (!cmd) {
- dev_kfree_skb(resp);
- return -ENOMEM;
- }
-
- cmd->code = cmd_code;
- cmd->req = req;
- cmd->resp = resp;
- cmd->resp_len = resp_len;
- cmd->complete_cb = complete_cb;
- cmd->complete_cb_context = complete_cb_context;
-
- pn533_build_cmd_frame(dev, cmd_code, req);
-
- rc = __pn533_send_frame_async(dev, req, resp, resp_len);
- if (rc < 0) {
- dev_kfree_skb(resp);
- kfree(cmd);
- } else {
- dev->cmd = 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);
-
- rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
- if (rc < 0) {
- dev_kfree_skb(cmd->req);
- dev_kfree_skb(cmd->resp);
- kfree(cmd);
- return;
- }
-
- dev->cmd = cmd;
-}
-
-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 begining of RX path by
- * async_complete_cb.
- *
- * 3. valid pointer in case of succesfult 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 void pn533_send_complete(struct urb *urb)
-{
- struct pn533 *dev = urb->context;
-
- switch (urb->status) {
- case 0:
- break; /* success */
- case -ECONNRESET:
- case -ENOENT:
- dev_dbg(&dev->interface->dev,
- "The urb has been stopped (status %d)\n",
- urb->status);
- break;
- case -ESHUTDOWN:
- default:
- nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
- urb->status);
- }
-}
-
-static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
-{
- /* ACR122U does not support any command which aborts last
- * issued command i.e. as ACK for standard PN533. Additionally,
- * it behaves stange, sending broken or incorrect responses,
- * when we cancel urb before the chip will send response.
- */
- if (dev->device_type == PN533_DEVICE_ACR122U)
- return;
-
- /* An ack will cancel the last issued command */
- pn533_send_ack(dev, flags);
-
- /* cancel the urb request */
- usb_kill_urb(dev->in_urb);
-}
-
-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 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;
- 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 int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
- int tgdata_len)
-{
- struct nfc_target nfc_tgt;
- int rc;
-
- dev_dbg(&dev->interface->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->interface->dev,
- "Unknown current poll modulation\n");
- return -EPROTO;
- }
-
- if (rc)
- return rc;
-
- if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
- dev_dbg(&dev->interface->dev,
- "The Tg found doesn't have the desired protocol\n");
- return -EAGAIN;
- }
-
- dev_dbg(&dev->interface->dev,
- "Target found - supported protocols: 0x%x\n",
- nfc_tgt.supported_protocols);
-
- dev->tgt_available_prots = nfc_tgt.supported_protocols;
-
- 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) {
- pn533_poll_reset_mod_list(dev);
- return 0;
- }
- }
-
- return -EAGAIN;
-}
-
-static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
-{
- struct sk_buff *skb;
- u8 *felica, *nfcid3, *gb;
-
- 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(skb, 1) = PN533_INIT_TARGET_DEP;
-
- /* MIFARE params */
- memcpy(skb_put(skb, 6), mifare_params, 6);
-
- /* Felica params */
- felica = skb_put(skb, 18);
- memcpy(felica, felica_params, 18);
- get_random_bytes(felica + 2, 6);
-
- /* NFCID3 */
- nfcid3 = skb_put(skb, 10);
- memset(nfcid3, 0, 10);
- memcpy(nfcid3, felica, 8);
-
- /* General bytes */
- *skb_put(skb, 1) = gbytes_len;
-
- gb = skb_put(skb, gbytes_len);
- memcpy(gb, gbytes, gbytes_len);
-
- /* Len Tk */
- *skb_put(skb, 1) = 0;
-
- return skb;
-}
-
-#define PN533_CMD_DATAEXCH_HEAD_LEN 1
-#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
-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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- 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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- 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);
-
- return;
-}
-
-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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- /* 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->interface->dev,
- "Error %d when trying to perform set meta data_exchange", rc);
-
- dev_kfree_skb(skb);
-
-error:
- pn533_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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- 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);
-
- return;
-}
-
-#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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- if (resp->len < ATR_REQ_GB_OFFSET + 1)
- return -EINVAL;
-
- mode = resp->data[0];
- cmd = &resp->data[1];
-
- dev_dbg(&dev->interface->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->interface->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(unsigned long data)
-{
- struct pn533 *dev = (struct pn533 *)data;
-
- dev_dbg(&dev->interface->dev, "Listen mode timeout\n");
-
- 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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- if (IS_ERR(resp)) {
- rc = PTR_ERR(resp);
-
- nfc_err(&dev->interface->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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- skb = pn533_alloc_skb(dev, 2);
- if (!skb)
- return;
-
- *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
- *skb_put(skb, 1) = 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->interface->dev, "RF setting error %d\n", rc);
- }
-
- return;
-}
-
-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);
-
- 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->interface->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};
-
- dev_dbg(&dev->interface->dev, "%s", __func__);
-
- 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(skb, 1) = 0x01; /* Active */
- *skb_put(skb, 1) = 0x02; /* 424 kbps */
-
- next = skb_put(skb, 1); /* Next */
- *next = 0;
-
- /* Copy passive data */
- memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
- *next |= 1;
-
- /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
- memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
- NFC_NFCID3_MAXSIZE);
- *next |= 2;
-
- memcpy(skb_put(skb, dev->gb_len), 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_poll_complete(struct pn533 *dev, void *arg,
- struct sk_buff *resp)
-{
- struct pn533_poll_modulations *cur_mod;
- int rc;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- if (IS_ERR(resp)) {
- rc = PTR_ERR(resp);
-
- nfc_err(&dev->interface->dev, "%s Poll complete error %d\n",
- __func__, rc);
-
- if (rc == -ENOENT) {
- if (dev->poll_mod_count != 0)
- return rc;
- else
- goto stop_poll;
- } else if (rc < 0) {
- nfc_err(&dev->interface->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->interface->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->interface->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;
-
- memcpy(skb_put(skb, mod->len), &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->interface->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->interface->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->interface->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->interface->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;
- pn533_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);
-
- return;
-}
-
-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;
- u8 rand_mod;
- int rc;
-
- dev_dbg(&dev->interface->dev,
- "%s: im protocols 0x%x tm protocols 0x%x\n",
- __func__, im_protocols, tm_protocols);
-
- if (dev->tgt_active_prot) {
- nfc_err(&dev->interface->dev,
- "Cannot poll with a target already activated\n");
- return -EBUSY;
- }
-
- if (dev->tgt_mode) {
- nfc_err(&dev->interface->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;
- }
-
- pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
- dev->poll_protocols = im_protocols;
- dev->listen_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->interface->dev,
- "Polling operation was not running\n");
- return;
- }
-
- pn533_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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
- if (!skb)
- return -ENOMEM;
-
- *skb_put(skb, sizeof(u8)) = 1; /* TG */
- *skb_put(skb, sizeof(u8)) = 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->interface->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->interface->dev, "%s: protocol=%u\n", __func__, protocol);
-
- if (dev->poll_mod_count) {
- nfc_err(&dev->interface->dev,
- "Cannot activate while polling\n");
- return -EBUSY;
- }
-
- if (dev->tgt_active_prot) {
- nfc_err(&dev->interface->dev,
- "There is already an active target\n");
- return -EBUSY;
- }
-
- if (!dev->tgt_available_prots) {
- nfc_err(&dev->interface->dev,
- "There is no available target to activate\n");
- return -EINVAL;
- }
-
- if (!(dev->tgt_available_prots & (1 << protocol))) {
- nfc_err(&dev->interface->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->interface->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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- if (IS_ERR(resp)) {
- rc = PTR_ERR(resp);
-
- nfc_err(&dev->interface->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->interface->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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- if (!dev->tgt_active_prot) {
- nfc_err(&dev->interface->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(skb, 1) = 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->interface->dev, "Target release error %d\n", rc);
- }
-
- return;
-}
-
-
-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->interface->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->interface->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->interface->dev, "Creating new target\n");
-
- 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};
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- if (dev->poll_mod_count) {
- nfc_err(&dev->interface->dev,
- "Cannot bring the DEP link up while polling\n");
- return -EBUSY;
- }
-
- if (dev->tgt_active_prot) {
- nfc_err(&dev->interface->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(skb, 1) = !comm_mode; /* ActPass */
- *skb_put(skb, 1) = 0x02; /* 424 kbps */
-
- next = skb_put(skb, 1); /* Next */
- *next = 0;
-
- /* Copy passive data */
- memcpy(skb_put(skb, PASSIVE_DATA_LEN), 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
- memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
- NFC_NFCID3_MAXSIZE);
- *next |= 2;
-
- if (gb != NULL && gb_len > 0) {
- memcpy(skb_put(skb, gb_len), 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);
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- pn533_poll_reset_mod_list(dev);
-
- if (dev->tgt_mode || dev->tgt_active_prot)
- pn533_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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- 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->interface->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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- 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->interface->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;
-}
-
-/* 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);
- break;
- }
-
- if (!dev->tgt_mode) {
- /* Reserve the TG/MI byte */
- skb_reserve(frag, 1);
-
- /* MI + TG */
- if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
- *skb_push(frag, sizeof(u8)) =
- (PN533_CMD_MI_MASK | 1);
- else
- *skb_push(frag, sizeof(u8)) = 1; /* TG */
- }
-
- memcpy(skb_put(frag, frag_size), 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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- if (!dev->tgt_active_prot) {
- nfc_err(&dev->interface->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;
- }
- 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 {
- *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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- 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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- /* 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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- 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;
- }
- default:
- *skb_put(skb, sizeof(u8)) = 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->interface->dev,
- "Error %d when trying to perform data_exchange\n", rc);
-
- dev_kfree_skb(skb);
- kfree(dev->cmd_complete_mi_arg);
-
-error:
- pn533_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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- /* 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->interface->dev,
- "Error %d when trying to perform data_exchange\n", rc);
-
- dev_kfree_skb(skb);
- kfree(dev->cmd_complete_dep_arg);
-
-error:
- pn533_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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
-
- skb = pn533_alloc_skb(dev, skb_len);
- if (!skb)
- return -ENOMEM;
-
- *skb_put(skb, sizeof(cfgitem)) = cfgitem;
- memcpy(skb_put(skb, cfgdata_len), 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;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- skb = pn533_alloc_skb(dev, sizeof(u8));
- if (!skb)
- return -ENOMEM;
-
- *skb_put(skb, sizeof(u8)) = 0x1;
-
- resp = pn533_send_cmd_sync(dev, 0x18, skb);
- if (IS_ERR(resp))
- return PTR_ERR(resp);
-
- dev_kfree_skb(resp);
-
- return 0;
-}
-
-struct pn533_acr122_poweron_rdr_arg {
- int rc;
- struct completion done;
-};
-
-static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
-{
- struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
-
- dev_dbg(&urb->dev->dev, "%s\n", __func__);
-
- print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
- urb->transfer_buffer, urb->transfer_buffer_length,
- false);
-
- arg->rc = urb->status;
- complete(&arg->done);
-}
-
-static int pn533_acr122_poweron_rdr(struct pn533 *dev)
-{
- /* Power on th reader (CCID cmd) */
- u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
- 0, 0, 0, 0, 0, 0, 3, 0, 0};
- u8 buf[255];
- int rc;
- void *cntx;
- struct pn533_acr122_poweron_rdr_arg arg;
-
- dev_dbg(&dev->interface->dev, "%s\n", __func__);
-
- init_completion(&arg.done);
- cntx = dev->in_urb->context; /* backup context */
-
- dev->in_urb->transfer_buffer = buf;
- dev->in_urb->transfer_buffer_length = 255;
- dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
- dev->in_urb->context = &arg;
-
- dev->out_urb->transfer_buffer = cmd;
- dev->out_urb->transfer_buffer_length = sizeof(cmd);
-
- print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
- cmd, sizeof(cmd), false);
-
- rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
- if (rc) {
- nfc_err(&dev->interface->dev,
- "Reader power on cmd error %d\n", rc);
- return rc;
- }
-
- rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
- if (rc) {
- nfc_err(&dev->interface->dev,
- "Can't submit reader poweron cmd response %d\n", rc);
- return rc;
- }
-
- wait_for_completion(&arg.done);
- dev->in_urb->context = cntx; /* restore context */
-
- return arg.rc;
-}
-
-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->interface->dev, "Error on setting RF field\n");
- return rc;
- }
-
- return rc;
-}
-
-static int pn533_dev_up(struct nfc_dev *nfc_dev)
-{
- return pn533_rf_field(nfc_dev, 1);
-}
-
-static int pn533_dev_down(struct nfc_dev *nfc_dev)
-{
- return pn533_rf_field(nfc_dev, 0);
-}
-
-static 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:
- 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->interface->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->interface->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->interface->dev, "Error on setting RF timings\n");
- return rc;
- }
-
- switch (dev->device_type) {
- case PN533_DEVICE_STD:
- 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->interface->dev,
- "Error while settings PASORI config\n");
- return rc;
- }
-
- pn533_pasori_fw_reset(dev);
-
- break;
- }
-
- return 0;
-}
-
-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;
- 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;
- mutex_init(&dev->cmd_lock);
-
- 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))
- in_endpoint = endpoint->bEndpointAddress;
-
- if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
- out_endpoint = endpoint->bEndpointAddress;
- }
-
- if (!in_endpoint || !out_endpoint) {
- nfc_err(&interface->dev,
- "Could not find bulk-in or bulk-out endpoint\n");
- rc = -ENODEV;
- goto error;
- }
-
- dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
- dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
-
- if (!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);
-
- INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
- INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
- INIT_WORK(&dev->mi_rx_work, pn533_wq_mi_recv);
- INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send);
- INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
- INIT_WORK(&dev->mi_tm_rx_work, pn533_wq_tm_mi_recv);
- INIT_WORK(&dev->mi_tm_tx_work, pn533_wq_tm_mi_send);
- INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll);
- INIT_WORK(&dev->rf_work, pn533_wq_rf);
- dev->wq = alloc_ordered_workqueue("pn533", 0);
- if (dev->wq == NULL)
- goto error;
-
- init_timer(&dev->listen_timer);
- dev->listen_timer.data = (unsigned long) dev;
- dev->listen_timer.function = pn533_listen_mode_timer;
-
- skb_queue_head_init(&dev->resp_q);
- skb_queue_head_init(&dev->fragment_skb);
-
- INIT_LIST_HEAD(&dev->cmd_queue);
-
- usb_set_intfdata(interface, dev);
-
- dev->ops = &pn533_std_frame_ops;
-
- dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
- dev->device_type = id->driver_info;
- switch (dev->device_type) {
- case PN533_DEVICE_STD:
- protocols = PN533_ALL_PROTOCOLS;
- break;
-
- case PN533_DEVICE_PASORI:
- protocols = PN533_NO_TYPE_B_PROTOCOLS;
- break;
-
- case PN533_DEVICE_ACR122U:
- protocols = PN533_NO_TYPE_B_PROTOCOLS;
- dev->ops = &pn533_acr122_frame_ops;
- dev->protocol_type = PN533_PROTO_REQ_RESP,
-
- rc = pn533_acr122_poweron_rdr(dev);
- if (rc < 0) {
- nfc_err(&dev->interface->dev,
- "Couldn't poweron the reader (error %d)\n", rc);
- goto destroy_wq;
- }
- break;
-
- default:
- nfc_err(&dev->interface->dev, "Unknown device type %d\n",
- dev->device_type);
- rc = -EINVAL;
- goto destroy_wq;
- }
-
- memset(&fw_ver, 0, sizeof(fw_ver));
- rc = pn533_get_firmware_version(dev, &fw_ver);
- if (rc < 0)
- goto destroy_wq;
-
- nfc_info(&dev->interface->dev,
- "NXP PN5%02X firmware ver %d.%d now attached\n",
- fw_ver.ic, fw_ver.ver, fw_ver.rev);
-
-
- dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
- dev->ops->tx_header_len +
- PN533_CMD_DATAEXCH_HEAD_LEN,
- dev->ops->tx_tail_len);
- if (!dev->nfc_dev) {
- rc = -ENOMEM;
- goto destroy_wq;
- }
-
- 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;
-
- rc = pn533_setup(dev);
- if (rc)
- goto unregister_nfc_dev;
-
- return 0;
-
-unregister_nfc_dev:
- nfc_unregister_device(dev->nfc_dev);
-
-free_nfc_dev:
- nfc_free_device(dev->nfc_dev);
-
-destroy_wq:
- destroy_workqueue(dev->wq);
-error:
- usb_free_urb(dev->in_urb);
- usb_free_urb(dev->out_urb);
- usb_put_dev(dev->udev);
- kfree(dev);
- return rc;
-}
-
-static void pn533_disconnect(struct usb_interface *interface)
-{
- struct pn533 *dev;
- struct pn533_cmd *cmd, *n;
-
- 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);
-
- flush_delayed_work(&dev->poll_work);
- destroy_workqueue(dev->wq);
-
- skb_queue_purge(&dev->resp_q);
-
- del_timer(&dev->listen_timer);
-
- list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
- list_del(&cmd->queue);
- kfree(cmd);
- }
-
- usb_free_urb(dev->in_urb);
- usb_free_urb(dev->out_urb);
- kfree(dev);
-
- nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n");
-}
-
-static struct usb_driver pn533_driver = {
- .name = "pn533",
- .probe = pn533_probe,
- .disconnect = pn533_disconnect,
- .id_table = pn533_table,
-};
-
-module_usb_driver(pn533_driver);
-
-MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@xxxxxxxxxxxxx>");
-MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@xxxxxxxxxxxxx>");
-MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@xxxxxxxxx>");
-MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
-MODULE_VERSION(VERSION);
-MODULE_LICENSE("GPL");
diff --git a/drivers/nfc/pn533/Kconfig b/drivers/nfc/pn533/Kconfig
new file mode 100644
index 0000000..b5a926e
--- /dev/null
+++ b/drivers/nfc/pn533/Kconfig
@@ -0,0 +1,16 @@
+config NFC_PN533
+ tristate
+ help
+ NXP PN533 core driver.
+ This driver provides core functionality for NXP PN533 NFC devices.
+
+config NFC_PN533_USB
+ tristate "NFC PN533 device support (USB)"
+ depends on USB
+ select NFC_PN533
+ ---help---
+ This module adds support for the NXP pn533 USB interface.
+ Select this if your platform is using the USB bus.
+
+ If you choose to build a module, it'll be called pn533_usb.
+ Say N if unsure.
diff --git a/drivers/nfc/pn533/Makefile b/drivers/nfc/pn533/Makefile
new file mode 100644
index 0000000..12c6be4
--- /dev/null
+++ b/drivers/nfc/pn533/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for PN533 NFC driver
+#
+pn533_usb-objs = usb.o
+
+obj-$(CONFIG_NFC_PN533) += pn533.o
+obj-$(CONFIG_NFC_PN533_USB) += pn533_usb.o
diff --git a/drivers/nfc/pn533/pn533.c b/drivers/nfc/pn533/pn533.c
new file mode 100644
index 0000000..4468284
--- /dev/null
+++ b/drivers/nfc/pn533/pn533.c
@@ -0,0 +1,2652 @@
+/*
+ * Driver for NXP PN533 NFC Chip - core functions
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/nfc.h>
+#include <linux/netdevice.h>
+#include <net/nfc/nfc.h>
+#include "pn533.h"
+
+#define VERSION "0.3"
+
+/* How much time we spend listening for initiators */
+#define PN533_LISTEN_TIME 2
+/* Delay between each poll frame (ms) */
+#define PN533_POLL_INTERVAL 10
+
+/* structs for pn533 commands */
+
+/* PN533_CMD_GET_FIRMWARE_VERSION */
+struct pn533_fw_version {
+ u8 ic;
+ u8 ver;
+ u8 rev;
+ u8 support;
+};
+
+/* PN533_CMD_RF_CONFIGURATION */
+#define PN533_CFGITEM_RF_FIELD 0x01
+#define PN533_CFGITEM_TIMING 0x02
+#define PN533_CFGITEM_MAX_RETRIES 0x05
+#define PN533_CFGITEM_PASORI 0x82
+
+#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
+#define PN533_CFGITEM_RF_FIELD_ON 0x1
+#define PN533_CFGITEM_RF_FIELD_OFF 0x0
+
+#define PN533_CONFIG_TIMING_102 0xb
+#define PN533_CONFIG_TIMING_204 0xc
+#define PN533_CONFIG_TIMING_409 0xd
+#define PN533_CONFIG_TIMING_819 0xe
+
+#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
+#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
+
+struct pn533_config_max_retries {
+ u8 mx_rty_atr;
+ u8 mx_rty_psl;
+ u8 mx_rty_passive_act;
+} __packed;
+
+struct pn533_config_timing {
+ u8 rfu;
+ u8 atr_res_timeout;
+ u8 dep_timeout;
+} __packed;
+
+/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
+
+/* felica commands opcode */
+#define PN533_FELICA_OPC_SENSF_REQ 0
+#define PN533_FELICA_OPC_SENSF_RES 1
+/* felica SENSF_REQ parameters */
+#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
+#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
+#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
+#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
+
+/* type B initiator_data values */
+#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
+#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
+#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
+
+union pn533_cmd_poll_initdata {
+ struct {
+ u8 afi;
+ u8 polling_method;
+ } __packed type_b;
+ struct {
+ u8 opcode;
+ __be16 sc;
+ u8 rc;
+ u8 tsn;
+ } __packed felica;
+};
+
+struct pn533_poll_modulations {
+ struct {
+ u8 maxtg;
+ u8 brty;
+ union pn533_cmd_poll_initdata initiator_data;
+ } __packed data;
+ u8 len;
+};
+
+static const struct pn533_poll_modulations poll_mod[] = {
+ [PN533_POLL_MOD_106KBPS_A] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 0,
+ },
+ .len = 2,
+ },
+ [PN533_POLL_MOD_212KBPS_FELICA] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 1,
+ .initiator_data.felica = {
+ .opcode = PN533_FELICA_OPC_SENSF_REQ,
+ .sc = PN533_FELICA_SENSF_SC_ALL,
+ .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
+ .tsn = 0x03,
+ },
+ },
+ .len = 7,
+ },
+ [PN533_POLL_MOD_424KBPS_FELICA] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 2,
+ .initiator_data.felica = {
+ .opcode = PN533_FELICA_OPC_SENSF_REQ,
+ .sc = PN533_FELICA_SENSF_SC_ALL,
+ .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
+ .tsn = 0x03,
+ },
+ },
+ .len = 7,
+ },
+ [PN533_POLL_MOD_106KBPS_JEWEL] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 4,
+ },
+ .len = 2,
+ },
+ [PN533_POLL_MOD_847KBPS_B] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 8,
+ .initiator_data.type_b = {
+ .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
+ .polling_method =
+ PN533_TYPE_B_POLL_METHOD_TIMESLOT,
+ },
+ },
+ .len = 3,
+ },
+ [PN533_LISTEN_MOD] = {
+ .len = 0,
+ },
+};
+
+/* PN533_CMD_IN_ATR */
+
+struct pn533_cmd_activate_response {
+ u8 status;
+ u8 nfcid3t[10];
+ u8 didt;
+ u8 bst;
+ u8 brt;
+ u8 to;
+ u8 ppt;
+ /* optional */
+ u8 gt[];
+} __packed;
+
+struct pn533_cmd_jump_dep_response {
+ u8 status;
+ u8 tg;
+ u8 nfcid3t[10];
+ u8 didt;
+ u8 bst;
+ u8 brt;
+ u8 to;
+ u8 ppt;
+ /* optional */
+ u8 gt[];
+} __packed;
+
+
+/* PN533_TG_INIT_AS_TARGET */
+#define PN533_INIT_TARGET_PASSIVE 0x1
+#define PN533_INIT_TARGET_DEP 0x2
+
+#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
+#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
+#define PN533_INIT_TARGET_RESP_DEP 0x4
+
+/* The rule: value(high byte) + value(low byte) + checksum = 0 */
+static inline u8 pn533_ext_checksum(u16 value)
+{
+ return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
+}
+
+/* The rule: value + checksum = 0 */
+static inline u8 pn533_std_checksum(u8 value)
+{
+ return ~value + 1;
+}
+
+/* The rule: sum(data elements) + checksum = 0 */
+static u8 pn533_std_data_checksum(u8 *data, int datalen)
+{
+ u8 sum = 0;
+ int i;
+
+ for (i = 0; i < datalen; i++)
+ sum += data[i];
+
+ return pn533_std_checksum(sum);
+}
+
+static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
+{
+ struct pn533_std_frame *frame = _frame;
+
+ frame->preamble = 0;
+ frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
+ PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
+ PN533_FRAME_CMD(frame) = cmd_code;
+ frame->datalen = 2;
+}
+
+static void pn533_std_tx_frame_finish(void *_frame)
+{
+ struct pn533_std_frame *frame = _frame;
+
+ frame->datalen_checksum = pn533_std_checksum(frame->datalen);
+
+ PN533_STD_FRAME_CHECKSUM(frame) =
+ pn533_std_data_checksum(frame->data, frame->datalen);
+
+ PN533_STD_FRAME_POSTAMBLE(frame) = 0;
+}
+
+static void pn533_std_tx_update_payload_len(void *_frame, int len)
+{
+ struct pn533_std_frame *frame = _frame;
+
+ frame->datalen += len;
+}
+
+static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
+{
+ u8 checksum;
+ struct pn533_std_frame *stdf = _frame;
+
+ if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
+ return false;
+
+ if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
+ /* Standard frame code */
+ dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
+
+ checksum = pn533_std_checksum(stdf->datalen);
+ if (checksum != stdf->datalen_checksum)
+ return false;
+
+ checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
+ if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
+ return false;
+ } else {
+ /* Extended */
+ struct pn533_ext_frame *eif = _frame;
+
+ dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
+
+ checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
+ if (checksum != eif->datalen_checksum)
+ return false;
+
+ /* check data checksum */
+ checksum = pn533_std_data_checksum(eif->data,
+ be16_to_cpu(eif->datalen));
+ if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
+ return false;
+ }
+
+ return true;
+}
+
+bool pn533_rx_frame_is_ack(void *_frame)
+{
+ struct pn533_std_frame *frame = _frame;
+
+ if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
+ return false;
+
+ if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
+ return false;
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
+
+static inline int pn533_std_rx_frame_size(void *frame)
+{
+ struct pn533_std_frame *f = frame;
+
+ /* check for Extended Information frame */
+ if (PN533_STD_IS_EXTENDED(f)) {
+ struct pn533_ext_frame *eif = frame;
+
+ return sizeof(struct pn533_ext_frame)
+ + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
+ }
+
+ return sizeof(struct pn533_std_frame) + f->datalen +
+ 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) ==
+ 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;
+ int status = cmd->status;
+
+ struct sk_buff *req = cmd->req;
+ struct sk_buff *resp = cmd->resp;
+
+ int rc;
+
+ dev_kfree_skb(req);
+
+ if (status < 0) {
+ rc = cmd->complete_cb(dev, cmd->complete_cb_context,
+ ERR_PTR(status));
+ dev_kfree_skb(resp);
+ goto done;
+ }
+
+ 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) {
+ rc = dev->phy_ops->send_frame(dev, req);
+ if (rc)
+ goto error;
+
+ dev->cmd_pending = 1;
+ dev->cmd = cmd;
+ 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)
+{
+ int rc;
+
+ rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
+ complete_cb_context);
+
+ return rc;
+}
+
+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)
+{
+ int rc;
+
+ rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
+ complete_cb_context);
+
+ return rc;
+}
+
+/*
+ * pn533_send_cmd_direct_async
+ *
+ * The function sends a piority cmd directly to the chip omiting 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);
+
+ rc = dev->phy_ops->send_frame(dev, req);
+ if (rc < 0)
+ kfree(cmd);
+ else
+ dev->cmd = 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);
+
+ rc = dev->phy_ops->send_frame(dev, cmd->req);
+ if (rc < 0) {
+ dev_kfree_skb(cmd->req);
+ kfree(cmd);
+ return;
+ }
+
+ dev->cmd = cmd;
+}
+
+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 begining of RX path by
+ * async_complete_cb.
+ *
+ * 3. valid pointer in case of succesfult 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 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;
+ 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 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;
+
+ 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) {
+ pn533_poll_reset_mod_list(dev);
+ return 0;
+ }
+ }
+
+ return -EAGAIN;
+}
+
+static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
+{
+ struct sk_buff *skb;
+ u8 *felica, *nfcid3, *gb;
+
+ 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(skb, 1) = PN533_INIT_TARGET_DEP;
+
+ /* MIFARE params */
+ memcpy(skb_put(skb, 6), mifare_params, 6);
+
+ /* Felica params */
+ felica = skb_put(skb, 18);
+ memcpy(felica, felica_params, 18);
+ get_random_bytes(felica + 2, 6);
+
+ /* NFCID3 */
+ nfcid3 = skb_put(skb, 10);
+ memset(nfcid3, 0, 10);
+ memcpy(nfcid3, felica, 8);
+
+ /* General bytes */
+ *skb_put(skb, 1) = gbytes_len;
+
+ gb = skb_put(skb, gbytes_len);
+ memcpy(gb, gbytes, gbytes_len);
+
+ /* Len Tk */
+ *skb_put(skb, 1) = 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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);
+
+ return;
+}
+
+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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ /* 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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);
+
+ return;
+}
+
+#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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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(unsigned long data)
+{
+ struct pn533 *dev = (struct pn533 *)data;
+
+ dev_dbg(dev->dev, "Listen mode timeout\n");
+
+ 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ skb = pn533_alloc_skb(dev, 2);
+ if (!skb)
+ return;
+
+ *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
+ *skb_put(skb, 1) = 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);
+ }
+
+ return;
+}
+
+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);
+
+ 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};
+
+ dev_dbg(dev->dev, "%s", __func__);
+
+ 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(skb, 1) = 0x01; /* Active */
+ *skb_put(skb, 1) = 0x02; /* 424 kbps */
+
+ next = skb_put(skb, 1); /* Next */
+ *next = 0;
+
+ /* Copy passive data */
+ memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
+ *next |= 1;
+
+ /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
+ memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
+ NFC_NFCID3_MAXSIZE);
+ *next |= 2;
+
+ memcpy(skb_put(skb, dev->gb_len), 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_poll_complete(struct pn533 *dev, void *arg,
+ struct sk_buff *resp)
+{
+ struct pn533_poll_modulations *cur_mod;
+ int rc;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+ else
+ 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;
+
+ memcpy(skb_put(skb, mod->len), &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);
+
+ return;
+}
+
+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;
+ 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;
+ }
+
+ pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
+ dev->poll_protocols = im_protocols;
+ dev->listen_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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, sizeof(u8)) = 1; /* TG */
+ *skb_put(skb, sizeof(u8)) = 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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(skb, 1) = 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);
+ }
+
+ return;
+}
+
+
+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");
+
+ 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};
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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(skb, 1) = !comm_mode; /* ActPass */
+ *skb_put(skb, 1) = 0x02; /* 424 kbps */
+
+ next = skb_put(skb, 1); /* Next */
+ *next = 0;
+
+ /* Copy passive data */
+ memcpy(skb_put(skb, PASSIVE_DATA_LEN), 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
+ memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
+ NFC_NFCID3_MAXSIZE);
+ *next |= 2;
+
+ if (gb != NULL && gb_len > 0) {
+ memcpy(skb_put(skb, gb_len), 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);
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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)
+{
+ dev->cmd->status = status;
+
+ if (skb == NULL) {
+ pr_err("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);
+ return;
+}
+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);
+ break;
+ }
+
+ if (!dev->tgt_mode) {
+ /* Reserve the TG/MI byte */
+ skb_reserve(frag, 1);
+
+ /* MI + TG */
+ if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
+ *skb_push(frag, sizeof(u8)) =
+ (PN533_CMD_MI_MASK | 1);
+ else
+ *skb_push(frag, sizeof(u8)) = 1; /* TG */
+ }
+
+ memcpy(skb_put(frag, frag_size), 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+ }
+ 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 {
+ *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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ /* 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ 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;
+ }
+ default:
+ *skb_put(skb, sizeof(u8)) = 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ /* 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
+
+ skb = pn533_alloc_skb(dev, skb_len);
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, sizeof(cfgitem)) = cfgitem;
+ memcpy(skb_put(skb, cfgdata_len), 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;
+
+ dev_dbg(dev->dev, "%s\n", __func__);
+
+ skb = pn533_alloc_skb(dev, sizeof(u8));
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, sizeof(u8)) = 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 rc;
+}
+
+static int pn533_dev_up(struct nfc_dev *nfc_dev)
+{
+ return pn533_rf_field(nfc_dev, 1);
+}
+
+static int pn533_dev_down(struct nfc_dev *nfc_dev)
+{
+ return pn533_rf_field(nfc_dev, 0);
+}
+
+static 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:
+ 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:
+ 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;
+}
+
+struct pn533 *pn533_register_device(u32 device_type,
+ u32 protocols,
+ enum pn533_protocol_type protocol_type,
+ void *phy,
+ struct pn533_phy_ops *phy_ops,
+ struct pn533_frame_ops *fops,
+ struct device *dev)
+{
+ struct pn533_fw_version fw_ver;
+ struct pn533 *priv;
+ int rc = -ENOMEM;
+
+ 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;
+
+ init_timer(&priv->listen_timer);
+ priv->listen_timer.data = (unsigned long) priv;
+ priv->listen_timer.function = pn533_listen_mode_timer;
+
+ skb_queue_head_init(&priv->resp_q);
+ skb_queue_head_init(&priv->fragment_skb);
+
+ INIT_LIST_HEAD(&priv->cmd_queue);
+
+ memset(&fw_ver, 0, sizeof(fw_ver));
+ rc = pn533_get_firmware_version(priv, &fw_ver);
+ if (rc < 0)
+ goto destroy_wq;
+
+ nfc_info(dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
+ fw_ver.ic, fw_ver.ver, fw_ver.rev);
+
+
+ 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) {
+ rc = -ENOMEM;
+ goto destroy_wq;
+ }
+
+ nfc_set_drvdata(priv->nfc_dev, priv);
+
+ rc = nfc_register_device(priv->nfc_dev);
+ if (rc)
+ goto free_nfc_dev;
+
+ rc = pn533_setup(priv);
+ if (rc)
+ goto unregister_nfc_dev;
+
+ return priv;
+
+unregister_nfc_dev:
+ nfc_unregister_device(priv->nfc_dev);
+
+free_nfc_dev:
+ nfc_free_device(priv->nfc_dev);
+
+destroy_wq:
+ destroy_workqueue(priv->wq);
+error:
+ kfree(priv);
+ return ERR_PTR(rc);
+}
+EXPORT_SYMBOL_GPL(pn533_register_device);
+
+void pn533_unregister_device(struct pn533 *priv)
+{
+ struct pn533_cmd *cmd, *n;
+
+ nfc_unregister_device(priv->nfc_dev);
+ nfc_free_device(priv->nfc_dev);
+
+ flush_delayed_work(&priv->poll_work);
+ destroy_workqueue(priv->wq);
+
+ skb_queue_purge(&priv->resp_q);
+
+ del_timer(&priv->listen_timer);
+
+ list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
+ list_del(&cmd->queue);
+ kfree(cmd);
+ }
+
+ kfree(priv);
+}
+EXPORT_SYMBOL_GPL(pn533_unregister_device);
+
+
+MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@xxxxxxxxxxxxx>");
+MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@xxxxxxxxxxxxx>");
+MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@xxxxxxxxx>");
+MODULE_DESCRIPTION("PN533 driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
diff --git a/drivers/nfc/pn533/pn533.h b/drivers/nfc/pn533/pn533.h
new file mode 100644
index 0000000..0958c653
--- /dev/null
+++ b/drivers/nfc/pn533/pn533.h
@@ -0,0 +1,234 @@
+/*
+ * Driver for NXP PN533 NFC Chip
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define PN533_DEVICE_STD 0x1
+#define PN533_DEVICE_PASORI 0x2
+#define PN533_DEVICE_ACR122U 0x3
+
+#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
+ NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
+ NFC_PROTO_NFC_DEP_MASK |\
+ NFC_PROTO_ISO14443_B_MASK)
+
+#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
+ NFC_PROTO_MIFARE_MASK | \
+ NFC_PROTO_FELICA_MASK | \
+ NFC_PROTO_ISO14443_MASK | \
+ NFC_PROTO_NFC_DEP_MASK)
+
+/* Standard pn533 frame definitions (standard and extended)*/
+#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
+ + 2) /* data[0] TFI, data[1] CC */
+#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
+
+#define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
+ + 2) /* data[0] TFI, data[1] CC */
+
+#define PN533_CMD_DATAEXCH_HEAD_LEN 1
+#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
+#define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */
+
+/*
+ * Max extended frame payload len, excluding TFI and CC
+ * which are already in PN533_FRAME_HEADER_LEN.
+ */
+#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
+
+#define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
+ Postamble (1) */
+#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
+#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
+/* Half start code (3), LEN (4) should be 0xffff for extended frame */
+#define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
+ && (hdr)->datalen_checksum == 0xFF)
+#define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
+
+/* start of frame */
+#define PN533_STD_FRAME_SOF 0x00FF
+
+/* standard frame identifier: in/out/error */
+#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
+#define PN533_STD_FRAME_DIR_OUT 0xD4
+#define PN533_STD_FRAME_DIR_IN 0xD5
+
+/* PN533 Commands */
+#define PN533_FRAME_CMD(f) (f->data[1])
+
+#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
+#define PN533_CMD_RF_CONFIGURATION 0x32
+#define PN533_CMD_IN_DATA_EXCHANGE 0x40
+#define PN533_CMD_IN_COMM_THRU 0x42
+#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
+#define PN533_CMD_IN_ATR 0x50
+#define PN533_CMD_IN_RELEASE 0x52
+#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
+
+#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
+#define PN533_CMD_TG_GET_DATA 0x86
+#define PN533_CMD_TG_SET_DATA 0x8e
+#define PN533_CMD_TG_SET_META_DATA 0x94
+#define PN533_CMD_UNDEF 0xff
+
+#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
+
+/* PN533 Return codes */
+#define PN533_CMD_RET_MASK 0x3F
+#define PN533_CMD_MI_MASK 0x40
+#define PN533_CMD_RET_SUCCESS 0x00
+
+
+enum pn533_protocol_type {
+ PN533_PROTO_REQ_ACK_RESP = 0,
+ PN533_PROTO_REQ_RESP
+};
+
+/* Poll modulations */
+enum {
+ PN533_POLL_MOD_106KBPS_A,
+ PN533_POLL_MOD_212KBPS_FELICA,
+ PN533_POLL_MOD_424KBPS_FELICA,
+ PN533_POLL_MOD_106KBPS_JEWEL,
+ PN533_POLL_MOD_847KBPS_B,
+ PN533_LISTEN_MOD,
+
+ __PN533_POLL_MOD_AFTER_LAST,
+};
+#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
+
+struct pn533_std_frame {
+ u8 preamble;
+ __be16 start_frame;
+ u8 datalen;
+ u8 datalen_checksum;
+ u8 data[];
+} __packed;
+
+struct pn533_ext_frame { /* Extended Information frame */
+ u8 preamble;
+ __be16 start_frame;
+ __be16 eif_flag; /* fixed to 0xFFFF */
+ __be16 datalen;
+ u8 datalen_checksum;
+ u8 data[];
+} __packed;
+
+struct pn533 {
+ struct nfc_dev *nfc_dev;
+ u32 device_type;
+ enum pn533_protocol_type protocol_type;
+
+ struct sk_buff_head resp_q;
+ struct sk_buff_head fragment_skb;
+
+ struct workqueue_struct *wq;
+ struct work_struct cmd_work;
+ struct work_struct cmd_complete_work;
+ struct delayed_work poll_work;
+ struct work_struct mi_rx_work;
+ struct work_struct mi_tx_work;
+ struct work_struct mi_tm_rx_work;
+ struct work_struct mi_tm_tx_work;
+ struct work_struct tg_work;
+ struct work_struct rf_work;
+
+ struct list_head cmd_queue;
+ struct pn533_cmd *cmd;
+ u8 cmd_pending;
+ struct mutex cmd_lock; /* protects cmd queue */
+
+ void *cmd_complete_mi_arg;
+ void *cmd_complete_dep_arg;
+
+ struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
+ u8 poll_mod_count;
+ u8 poll_mod_curr;
+ u8 poll_dep;
+ u32 poll_protocols;
+ u32 listen_protocols;
+ struct timer_list listen_timer;
+ int cancel_listen;
+
+ u8 *gb;
+ size_t gb_len;
+
+ u8 tgt_available_prots;
+ u8 tgt_active_prot;
+ u8 tgt_mode;
+
+ struct pn533_frame_ops *ops;
+
+ struct device *dev;
+ void *phy;
+ struct pn533_phy_ops *phy_ops;
+};
+
+typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
+ struct sk_buff *resp);
+
+struct pn533_cmd {
+ struct list_head queue;
+ u8 code;
+ int status;
+ struct sk_buff *req;
+ struct sk_buff *resp;
+ pn533_send_async_complete_t complete_cb;
+ void *complete_cb_context;
+};
+
+
+struct pn533_frame_ops {
+ void (*tx_frame_init)(void *frame, u8 cmd_code);
+ void (*tx_frame_finish)(void *frame);
+ void (*tx_update_payload_len)(void *frame, int len);
+ int tx_header_len;
+ int tx_tail_len;
+
+ bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
+ bool (*rx_frame_is_ack)(void *frame);
+ int (*rx_frame_size)(void *frame);
+ int rx_header_len;
+ int rx_tail_len;
+
+ int max_payload_len;
+ u8 (*get_cmd_code)(void *frame);
+};
+
+
+struct pn533_phy_ops {
+ int (*send_frame)(struct pn533 *priv,
+ struct sk_buff *out);
+ int (*send_ack)(struct pn533 *dev, gfp_t flags);
+ void (*abort_cmd)(struct pn533 *priv, gfp_t flags);
+};
+
+
+struct pn533 *pn533_register_device(u32 device_type,
+ u32 protocols,
+ enum pn533_protocol_type protocol_type,
+ void *phy,
+ struct pn533_phy_ops *phy_ops,
+ struct pn533_frame_ops *fops,
+ struct device *dev);
+
+void pn533_unregister_device(struct pn533 *priv);
+void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status);
+
+bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame);
+bool pn533_rx_frame_is_ack(void *_frame);
diff --git a/drivers/nfc/pn533/usb.c b/drivers/nfc/pn533/usb.c
new file mode 100644
index 0000000..60fdfe6
--- /dev/null
+++ b/drivers/nfc/pn533/usb.c
@@ -0,0 +1,594 @@
+/*
+ * Driver for NXP PN533 NFC Chip - USB transport layer
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/nfc.h>
+#include <linux/netdevice.h>
+#include <net/nfc/nfc.h>
+#include "pn533.h"
+
+#define VERSION "0.1"
+
+#define PN533_VENDOR_ID 0x4CC
+#define PN533_PRODUCT_ID 0x2533
+
+#define SCM_VENDOR_ID 0x4E6
+#define SCL3711_PRODUCT_ID 0x5591
+
+#define SONY_VENDOR_ID 0x054c
+#define PASORI_PRODUCT_ID 0x02e1
+
+#define ACS_VENDOR_ID 0x072f
+#define ACR122U_PRODUCT_ID 0x2200
+
+static const struct usb_device_id pn533_usb_table[] = {
+ { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_STD },
+ { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_STD },
+ { USB_DEVICE(SONY_VENDOR_ID, PASORI_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_PASORI },
+ { USB_DEVICE(ACS_VENDOR_ID, ACR122U_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_ACR122U },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, pn533_usb_table);
+
+struct pn533_usb_phy {
+ struct usb_device *udev;
+ struct usb_interface *interface;
+
+ struct urb *out_urb;
+ struct urb *in_urb;
+
+ struct pn533 *priv;
+};
+
+static void pn533_recv_response(struct urb *urb)
+{
+ struct pn533_usb_phy *phy = urb->context;
+ struct sk_buff *skb = NULL;
+
+ if (!urb->status) {
+ skb = alloc_skb(urb->actual_length, GFP_KERNEL);
+ if (!skb) {
+ nfc_err(&phy->udev->dev, "failed to alloc memory\n");
+ } else {
+ memcpy(skb_put(skb, urb->actual_length),
+ urb->transfer_buffer, urb->actual_length);
+ }
+ }
+
+ pn533_recv_frame(phy->priv, skb, urb->status);
+}
+
+static int pn533_submit_urb_for_response(struct pn533_usb_phy *phy, gfp_t flags)
+{
+ phy->in_urb->complete = pn533_recv_response;
+
+ return usb_submit_urb(phy->in_urb, flags);
+}
+
+static void pn533_recv_ack(struct urb *urb)
+{
+ struct pn533_usb_phy *phy = urb->context;
+ struct pn533 *priv = phy->priv;
+ struct pn533_cmd *cmd = priv->cmd;
+ struct pn533_std_frame *in_frame;
+ int rc;
+
+ cmd->status = urb->status;
+
+ switch (urb->status) {
+ case 0:
+ break; /* success */
+ case -ECONNRESET:
+ case -ENOENT:
+ dev_dbg(&phy->udev->dev,
+ "The urb has been stopped (status %d)\n",
+ urb->status);
+ goto sched_wq;
+ case -ESHUTDOWN:
+ default:
+ nfc_err(&phy->udev->dev,
+ "Urb failure (status %d)\n", urb->status);
+ goto sched_wq;
+ }
+
+ in_frame = phy->in_urb->transfer_buffer;
+
+ if (!pn533_rx_frame_is_ack(in_frame)) {
+ nfc_err(&phy->udev->dev, "Received an invalid ack\n");
+ cmd->status = -EIO;
+ goto sched_wq;
+ }
+
+ rc = pn533_submit_urb_for_response(phy, GFP_ATOMIC);
+ if (rc) {
+ nfc_err(&phy->udev->dev,
+ "usb_submit_urb failed with result %d\n", rc);
+ cmd->status = rc;
+ goto sched_wq;
+ }
+
+ return;
+
+sched_wq:
+ queue_work(priv->wq, &priv->cmd_complete_work);
+}
+
+static int pn533_submit_urb_for_ack(struct pn533_usb_phy *phy, gfp_t flags)
+{
+ phy->in_urb->complete = pn533_recv_ack;
+
+ return usb_submit_urb(phy->in_urb, flags);
+}
+
+static int pn533_usb_send_ack(struct pn533 *dev, gfp_t flags)
+{
+ struct pn533_usb_phy *phy = dev->phy;
+ u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
+ /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
+ int rc;
+
+ phy->out_urb->transfer_buffer = ack;
+ phy->out_urb->transfer_buffer_length = sizeof(ack);
+ rc = usb_submit_urb(phy->out_urb, flags);
+
+ return rc;
+}
+
+static int pn533_usb_send_frame(struct pn533 *dev,
+ struct sk_buff *out)
+{
+ struct pn533_usb_phy *phy = dev->phy;
+ int rc;
+
+ if (phy->priv == NULL)
+ phy->priv = dev;
+
+ phy->out_urb->transfer_buffer = out->data;
+ phy->out_urb->transfer_buffer_length = out->len;
+
+ print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
+ out->data, out->len, false);
+
+ rc = usb_submit_urb(phy->out_urb, GFP_KERNEL);
+ if (rc)
+ return rc;
+
+ if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
+ /* request for response for sent packet directly */
+ rc = pn533_submit_urb_for_response(phy, GFP_ATOMIC);
+ if (rc)
+ goto error;
+ } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
+ /* request for ACK if that's the case */
+ rc = pn533_submit_urb_for_ack(phy, GFP_KERNEL);
+ if (rc)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ usb_unlink_urb(phy->out_urb);
+ return rc;
+}
+
+static void pn533_usb_abort_cmd(struct pn533 *dev, gfp_t flags)
+{
+ struct pn533_usb_phy *phy = dev->phy;
+
+ /* ACR122U does not support any command which aborts last
+ * issued command i.e. as ACK for standard PN533. Additionally,
+ * it behaves stange, sending broken or incorrect responses,
+ * when we cancel urb before the chip will send response.
+ */
+ if (dev->device_type == PN533_DEVICE_ACR122U)
+ return;
+
+ /* An ack will cancel the last issued command */
+ pn533_usb_send_ack(dev, flags);
+
+ /* cancel the urb request */
+ usb_kill_urb(phy->in_urb);
+}
+
+/* ACR122 specific structs and fucntions */
+
+/* ACS ACR122 pn533 frame definitions */
+#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
+ + 2)
+#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
+#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
+ + 2)
+#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
+#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
+
+/* CCID messages types */
+#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
+#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
+
+#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
+
+
+struct pn533_acr122_ccid_hdr {
+ u8 type;
+ u32 datalen;
+ u8 slot;
+ u8 seq;
+ u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
+ byte for reposnse msg */
+ u8 data[]; /* payload */
+} __packed;
+
+struct pn533_acr122_apdu_hdr {
+ u8 class;
+ u8 ins;
+ u8 p1;
+ u8 p2;
+} __packed;
+
+struct pn533_acr122_tx_frame {
+ struct pn533_acr122_ccid_hdr ccid;
+ struct pn533_acr122_apdu_hdr apdu;
+ u8 datalen;
+ u8 data[]; /* pn533 frame: TFI ... */
+} __packed;
+
+struct pn533_acr122_rx_frame {
+ struct pn533_acr122_ccid_hdr ccid;
+ u8 data[]; /* pn533 frame : TFI ... */
+} __packed;
+
+static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
+{
+ struct pn533_acr122_tx_frame *frame = _frame;
+
+ frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
+ frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
+ sizeof(datalen) */
+ frame->ccid.slot = 0;
+ frame->ccid.seq = 0;
+ frame->ccid.params[0] = 0;
+ frame->ccid.params[1] = 0;
+ frame->ccid.params[2] = 0;
+
+ frame->data[0] = PN533_STD_FRAME_DIR_OUT;
+ frame->data[1] = cmd_code;
+ frame->datalen = 2; /* data[0] + data[1] */
+
+ frame->apdu.class = 0xFF;
+ frame->apdu.ins = 0;
+ frame->apdu.p1 = 0;
+ frame->apdu.p2 = 0;
+}
+
+static void pn533_acr122_tx_frame_finish(void *_frame)
+{
+ struct pn533_acr122_tx_frame *frame = _frame;
+
+ frame->ccid.datalen += frame->datalen;
+}
+
+static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
+{
+ struct pn533_acr122_tx_frame *frame = _frame;
+
+ frame->datalen += len;
+}
+
+static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
+{
+ struct pn533_acr122_rx_frame *frame = _frame;
+
+ if (frame->ccid.type != 0x83)
+ return false;
+
+ if (!frame->ccid.datalen)
+ return false;
+
+ if (frame->data[frame->ccid.datalen - 2] == 0x63)
+ return false;
+
+ return true;
+}
+
+static int pn533_acr122_rx_frame_size(void *frame)
+{
+ struct pn533_acr122_rx_frame *f = frame;
+
+ /* f->ccid.datalen already includes tail length */
+ return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
+}
+
+static u8 pn533_acr122_get_cmd_code(void *frame)
+{
+ struct pn533_acr122_rx_frame *f = frame;
+
+ return PN533_FRAME_CMD(f);
+}
+
+static struct pn533_frame_ops pn533_acr122_frame_ops = {
+ .tx_frame_init = pn533_acr122_tx_frame_init,
+ .tx_frame_finish = pn533_acr122_tx_frame_finish,
+ .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
+ .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
+ .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
+
+ .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
+ .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
+ .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
+ .rx_frame_size = pn533_acr122_rx_frame_size,
+
+ .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
+ .get_cmd_code = pn533_acr122_get_cmd_code,
+};
+
+struct pn533_acr122_poweron_rdr_arg {
+ int rc;
+ struct completion done;
+};
+
+static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
+{
+ struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
+
+ dev_dbg(&urb->dev->dev, "%s\n", __func__);
+
+ print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
+ urb->transfer_buffer, urb->transfer_buffer_length,
+ false);
+
+ arg->rc = urb->status;
+ complete(&arg->done);
+}
+
+static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy)
+{
+ /* Power on th reader (CCID cmd) */
+ u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
+ 0, 0, 0, 0, 0, 0, 3, 0, 0};
+ int rc;
+ void *cntx;
+ struct pn533_acr122_poweron_rdr_arg arg;
+
+ dev_dbg(&phy->udev->dev, "%s\n", __func__);
+
+ init_completion(&arg.done);
+ cntx = phy->in_urb->context; /* backup context */
+
+ phy->in_urb->complete = pn533_acr122_poweron_rdr_resp;
+ phy->in_urb->context = &arg;
+
+ phy->out_urb->transfer_buffer = cmd;
+ phy->out_urb->transfer_buffer_length = sizeof(cmd);
+
+ print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
+ cmd, sizeof(cmd), false);
+
+ rc = usb_submit_urb(phy->out_urb, GFP_KERNEL);
+ if (rc) {
+ nfc_err(&phy->udev->dev,
+ "Reader power on cmd error %d\n", rc);
+ return rc;
+ }
+
+ rc = usb_submit_urb(phy->in_urb, GFP_KERNEL);
+ if (rc) {
+ nfc_err(&phy->udev->dev,
+ "Can't submit reader poweron cmd response %d\n", rc);
+ return rc;
+ }
+
+ wait_for_completion(&arg.done);
+ phy->in_urb->context = cntx; /* restore context */
+
+ return arg.rc;
+}
+
+static void pn533_send_complete(struct urb *urb)
+{
+ struct pn533_usb_phy *phy = urb->context;
+
+ switch (urb->status) {
+ case 0:
+ break; /* success */
+ case -ECONNRESET:
+ case -ENOENT:
+ dev_dbg(&phy->udev->dev,
+ "The urb has been stopped (status %d)\n",
+ urb->status);
+ break;
+ case -ESHUTDOWN:
+ default:
+ nfc_err(&phy->udev->dev,
+ "Urb failure (status %d)\n",
+ urb->status);
+ }
+}
+
+static struct pn533_phy_ops usb_phy_ops = {
+ .send_frame = pn533_usb_send_frame,
+ .send_ack = pn533_usb_send_ack,
+ .abort_cmd = pn533_usb_abort_cmd,
+};
+
+static int pn533_usb_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ struct pn533 *priv;
+ struct pn533_usb_phy *phy;
+ struct usb_host_interface *iface_desc;
+ struct usb_endpoint_descriptor *endpoint;
+ int in_endpoint = 0;
+ int out_endpoint = 0;
+ int rc = -ENOMEM;
+ int i;
+ u32 protocols;
+ enum pn533_protocol_type protocol_type = PN533_PROTO_REQ_ACK_RESP;
+ struct pn533_frame_ops *fops = NULL;
+ unsigned char *in_buf;
+ int in_buf_len = PN533_EXT_FRAME_HEADER_LEN +
+ PN533_STD_FRAME_MAX_PAYLOAD_LEN +
+ PN533_STD_FRAME_TAIL_LEN;
+
+ phy = devm_kzalloc(&interface->dev, sizeof(*phy), GFP_KERNEL);
+ if (!phy)
+ return -ENOMEM;
+
+ in_buf = kzalloc(in_buf_len, GFP_KERNEL);
+ if (!in_buf) {
+ rc = -ENOMEM;
+ goto out_free_phy;
+ }
+
+ phy->udev = usb_get_dev(interface_to_usbdev(interface));
+ phy->interface = interface;
+
+ 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))
+ in_endpoint = endpoint->bEndpointAddress;
+
+ if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
+ out_endpoint = endpoint->bEndpointAddress;
+ }
+
+ if (!in_endpoint || !out_endpoint) {
+ nfc_err(&interface->dev,
+ "Could not find bulk-in or bulk-out endpoint\n");
+ rc = -ENODEV;
+ goto error;
+ }
+
+ phy->in_urb = usb_alloc_urb(0, GFP_KERNEL);
+ phy->out_urb = usb_alloc_urb(0, GFP_KERNEL);
+
+ if (!phy->in_urb || !phy->out_urb)
+ goto error;
+
+ usb_fill_bulk_urb(phy->in_urb, phy->udev,
+ usb_rcvbulkpipe(phy->udev, in_endpoint),
+ in_buf, in_buf_len, NULL, phy);
+
+ usb_fill_bulk_urb(phy->out_urb, phy->udev,
+ usb_sndbulkpipe(phy->udev, out_endpoint),
+ NULL, 0, pn533_send_complete, phy);
+
+
+ switch (id->driver_info) {
+ case PN533_DEVICE_STD:
+ protocols = PN533_ALL_PROTOCOLS;
+ break;
+
+ case PN533_DEVICE_PASORI:
+ protocols = PN533_NO_TYPE_B_PROTOCOLS;
+ break;
+
+ case PN533_DEVICE_ACR122U:
+ protocols = PN533_NO_TYPE_B_PROTOCOLS;
+ fops = &pn533_acr122_frame_ops;
+ protocol_type = PN533_PROTO_REQ_RESP,
+
+ rc = pn533_acr122_poweron_rdr(phy);
+ if (rc < 0) {
+ nfc_err(&interface->dev,
+ "Couldn't poweron the reader (error %d)\n", rc);
+ goto error;
+ }
+ break;
+
+ default:
+ nfc_err(&interface->dev, "Unknown device type %lu\n",
+ id->driver_info);
+ rc = -EINVAL;
+ goto error;
+ }
+
+ priv = pn533_register_device(id->driver_info, protocols, protocol_type,
+ phy, &usb_phy_ops, fops,
+ &phy->udev->dev);
+
+ if (IS_ERR(priv)) {
+ rc = PTR_ERR(priv);
+ goto error;
+ }
+
+ phy->priv = priv;
+ nfc_set_parent_dev(priv->nfc_dev, &interface->dev);
+
+ usb_set_intfdata(interface, phy);
+
+ return 0;
+
+error:
+ usb_free_urb(phy->in_urb);
+ usb_free_urb(phy->out_urb);
+ usb_put_dev(phy->udev);
+ kfree(in_buf);
+out_free_phy:
+ kfree(phy);
+ return rc;
+}
+
+static void pn533_usb_disconnect(struct usb_interface *interface)
+{
+ struct pn533_usb_phy *phy = usb_get_intfdata(interface);
+
+ if (!phy)
+ return;
+
+ pn533_unregister_device(phy->priv);
+
+ usb_set_intfdata(interface, NULL);
+
+ usb_kill_urb(phy->in_urb);
+ usb_kill_urb(phy->out_urb);
+
+ kfree(phy->in_urb->transfer_buffer);
+ usb_free_urb(phy->in_urb);
+ usb_free_urb(phy->out_urb);
+
+ nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n");
+}
+
+static struct usb_driver pn533_usb_driver = {
+ .name = "pn533_usb",
+ .probe = pn533_usb_probe,
+ .disconnect = pn533_usb_disconnect,
+ .id_table = pn533_usb_table,
+};
+
+module_usb_driver(pn533_usb_driver);
+
+MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@xxxxxxxxxxxxx>");
+MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@xxxxxxxxxxxxx>");
+MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@xxxxxxxxx>");
+MODULE_DESCRIPTION("PN533 USB driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
--
2.5.5

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