Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 4410 insertions, 0 deletions

diff --git a/drivers/nfc/pn533/Kconfig b/drivers/nfc/pn533/Kconfig
new file mode 100644
index 000000000..31822b432
--- /dev/null
+++ b/drivers/nfc/pn533/Kconfig
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0-only
+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.
+
+config NFC_PN533_I2C
+	tristate "NFC PN533 device support (I2C)"
+	depends on I2C
+	select NFC_PN533
+	help
+	  This module adds support for the NXP pn533 I2C interface.
+	  Select this if your platform is using the I2C bus.
+
+	  If you choose to build a module, it'll be called pn533_i2c.
+	  Say N if unsure.
+
+config NFC_PN532_UART
+	tristate "NFC PN532 device support (UART)"
+	depends on SERIAL_DEV_BUS
+	select NFC_PN533
+	help
+	  This module adds support for the NXP pn532 UART interface.
+	  Select this if your platform is using the UART bus.
+
+	  If you choose to build a module, it'll be called pn532_uart.
+	  Say N if unsure.
diff --git a/drivers/nfc/pn533/Makefile b/drivers/nfc/pn533/Makefile
new file mode 100644
index 000000000..b96483375
--- /dev/null
+++ b/drivers/nfc/pn533/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for PN533 NFC driver
+#
+pn533_usb-objs  = usb.o
+pn533_i2c-objs  = i2c.o
+pn532_uart-objs  = uart.o
+
+obj-$(CONFIG_NFC_PN533)     += pn533.o
+obj-$(CONFIG_NFC_PN533_USB) += pn533_usb.o
+obj-$(CONFIG_NFC_PN533_I2C) += pn533_i2c.o
+obj-$(CONFIG_NFC_PN532_UART) += pn532_uart.o
diff --git a/drivers/nfc/pn533/i2c.c b/drivers/nfc/pn533/i2c.c
new file mode 100644
index 000000000..ddf3db286
--- /dev/null
+++ b/drivers/nfc/pn533/i2c.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for NXP PN533 NFC Chip - I2C transport layer
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ * Copyright (C) 2016 HALE electronic
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/nfc.h>
+#include <linux/netdevice.h>
+#include <linux/interrupt.h>
+#include <net/nfc/nfc.h>
+#include "pn533.h"
+
+#define VERSION "0.1"
+
+#define PN533_I2C_DRIVER_NAME "pn533_i2c"
+
+struct pn533_i2c_phy {
+	struct i2c_client *i2c_dev;
+	struct pn533 *priv;
+
+	bool aborted;
+
+	int hard_fault;		/*
+				 * < 0 if hardware error occurred (e.g. i2c err)
+				 * and prevents normal operation.
+				 */
+};
+
+static int pn533_i2c_send_ack(struct pn533 *dev, gfp_t flags)
+{
+	struct pn533_i2c_phy *phy = dev->phy;
+	struct i2c_client *client = phy->i2c_dev;
+	static const u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
+	/* spec 6.2.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
+
+	return i2c_master_send(client, ack, 6);
+}
+
+static int pn533_i2c_send_frame(struct pn533 *dev,
+				struct sk_buff *out)
+{
+	struct pn533_i2c_phy *phy = dev->phy;
+	struct i2c_client *client = phy->i2c_dev;
+	int rc;
+
+	if (phy->hard_fault != 0)
+		return phy->hard_fault;
+
+	if (phy->priv == NULL)
+		phy->priv = dev;
+
+	phy->aborted = false;
+
+	print_hex_dump_debug("PN533_i2c TX: ", DUMP_PREFIX_NONE, 16, 1,
+			     out->data, out->len, false);
+
+	rc = i2c_master_send(client, out->data, out->len);
+
+	if (rc == -EREMOTEIO) { /* Retry, chip was in power down */
+		usleep_range(6000, 10000);
+		rc = i2c_master_send(client, out->data, out->len);
+	}
+
+	if (rc >= 0) {
+		if (rc != out->len)
+			rc = -EREMOTEIO;
+		else
+			rc = 0;
+	}
+
+	return rc;
+}
+
+static void pn533_i2c_abort_cmd(struct pn533 *dev, gfp_t flags)
+{
+	struct pn533_i2c_phy *phy = dev->phy;
+
+	phy->aborted = true;
+
+	/* An ack will cancel the last issued command */
+	pn533_i2c_send_ack(dev, flags);
+
+	/* schedule cmd_complete_work to finish current command execution */
+	pn533_recv_frame(phy->priv, NULL, -ENOENT);
+}
+
+static int pn533_i2c_read(struct pn533_i2c_phy *phy, struct sk_buff **skb)
+{
+	struct i2c_client *client = phy->i2c_dev;
+	int len = PN533_EXT_FRAME_HEADER_LEN +
+		  PN533_STD_FRAME_MAX_PAYLOAD_LEN +
+		  PN533_STD_FRAME_TAIL_LEN + 1;
+	int r;
+
+	*skb = alloc_skb(len, GFP_KERNEL);
+	if (*skb == NULL)
+		return -ENOMEM;
+
+	r = i2c_master_recv(client, skb_put(*skb, len), len);
+	if (r != len) {
+		nfc_err(&client->dev, "cannot read. r=%d len=%d\n", r, len);
+		kfree_skb(*skb);
+		return -EREMOTEIO;
+	}
+
+	if (!((*skb)->data[0] & 0x01)) {
+		nfc_err(&client->dev, "READY flag not set");
+		kfree_skb(*skb);
+		return -EBUSY;
+	}
+
+	/* remove READY byte */
+	skb_pull(*skb, 1);
+	/* trim to frame size */
+	skb_trim(*skb, phy->priv->ops->rx_frame_size((*skb)->data));
+
+	return 0;
+}
+
+static irqreturn_t pn533_i2c_irq_thread_fn(int irq, void *data)
+{
+	struct pn533_i2c_phy *phy = data;
+	struct sk_buff *skb = NULL;
+	int r;
+
+	if (!phy || irq != phy->i2c_dev->irq) {
+		WARN_ON_ONCE(1);
+		return IRQ_NONE;
+	}
+
+	if (phy->hard_fault != 0)
+		return IRQ_HANDLED;
+
+	r = pn533_i2c_read(phy, &skb);
+	if (r == -EREMOTEIO) {
+		phy->hard_fault = r;
+
+		pn533_recv_frame(phy->priv, NULL, -EREMOTEIO);
+
+		return IRQ_HANDLED;
+	} else if ((r == -ENOMEM) || (r == -EBADMSG) || (r == -EBUSY)) {
+		return IRQ_HANDLED;
+	}
+
+	if (!phy->aborted)
+		pn533_recv_frame(phy->priv, skb, 0);
+
+	return IRQ_HANDLED;
+}
+
+static const struct pn533_phy_ops i2c_phy_ops = {
+	.send_frame = pn533_i2c_send_frame,
+	.send_ack = pn533_i2c_send_ack,
+	.abort_cmd = pn533_i2c_abort_cmd,
+};
+
+
+static int pn533_i2c_probe(struct i2c_client *client,
+			       const struct i2c_device_id *id)
+{
+	struct pn533_i2c_phy *phy;
+	struct pn533 *priv;
+	int r = 0;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		nfc_err(&client->dev, "Need I2C_FUNC_I2C\n");
+		return -ENODEV;
+	}
+
+	phy = devm_kzalloc(&client->dev, sizeof(struct pn533_i2c_phy),
+			   GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	phy->i2c_dev = client;
+	i2c_set_clientdata(client, phy);
+
+	priv = pn53x_common_init(PN533_DEVICE_PN532,
+				PN533_PROTO_REQ_ACK_RESP,
+				phy, &i2c_phy_ops, NULL,
+				&phy->i2c_dev->dev);
+
+	if (IS_ERR(priv))
+		return PTR_ERR(priv);
+
+	phy->priv = priv;
+	r = pn532_i2c_nfc_alloc(priv, PN533_NO_TYPE_B_PROTOCOLS, &client->dev);
+	if (r)
+		goto nfc_alloc_err;
+
+	r = request_threaded_irq(client->irq, NULL, pn533_i2c_irq_thread_fn,
+				IRQF_TRIGGER_FALLING |
+				IRQF_SHARED | IRQF_ONESHOT,
+				PN533_I2C_DRIVER_NAME, phy);
+	if (r < 0) {
+		nfc_err(&client->dev, "Unable to register IRQ handler\n");
+		goto irq_rqst_err;
+	}
+
+	r = pn533_finalize_setup(priv);
+	if (r)
+		goto fn_setup_err;
+
+	r = nfc_register_device(priv->nfc_dev);
+	if (r)
+		goto fn_setup_err;
+
+	return r;
+
+fn_setup_err:
+	free_irq(client->irq, phy);
+
+irq_rqst_err:
+	nfc_free_device(priv->nfc_dev);
+
+nfc_alloc_err:
+	pn53x_common_clean(phy->priv);
+
+	return r;
+}
+
+static void pn533_i2c_remove(struct i2c_client *client)
+{
+	struct pn533_i2c_phy *phy = i2c_get_clientdata(client);
+
+	free_irq(client->irq, phy);
+
+	pn53x_unregister_nfc(phy->priv);
+	pn53x_common_clean(phy->priv);
+}
+
+static const struct of_device_id of_pn533_i2c_match[] __maybe_unused = {
+	{ .compatible = "nxp,pn532", },
+	/*
+	 * NOTE: The use of the compatibles with the trailing "...-i2c" is
+	 * deprecated and will be removed.
+	 */
+	{ .compatible = "nxp,pn533-i2c", },
+	{ .compatible = "nxp,pn532-i2c", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_pn533_i2c_match);
+
+static const struct i2c_device_id pn533_i2c_id_table[] = {
+	{ PN533_I2C_DRIVER_NAME, 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, pn533_i2c_id_table);
+
+static struct i2c_driver pn533_i2c_driver = {
+	.driver = {
+		   .name = PN533_I2C_DRIVER_NAME,
+		   .of_match_table = of_match_ptr(of_pn533_i2c_match),
+		  },
+	.probe = pn533_i2c_probe,
+	.id_table = pn533_i2c_id_table,
+	.remove = pn533_i2c_remove,
+};
+
+module_i2c_driver(pn533_i2c_driver);
+
+MODULE_AUTHOR("Michael Thalmeier <michael.thalmeier@hale.at>");
+MODULE_DESCRIPTION("PN533 I2C driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
diff --git a/drivers/nfc/pn533/pn533.c b/drivers/nfc/pn533/pn533.c
new file mode 100644
index 000000000..f0cac1900
--- /dev/null
+++ b/drivers/nfc/pn533/pn533.c
@@ -0,0 +1,2856 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for NXP PN533 NFC Chip - core functions
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/nfc.h>
+#include <linux/netdevice.h>
+#include <net/nfc/nfc.h>
+#include "pn533.h"
+
+#define VERSION "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;
+
+struct pn532_autopoll_resp {
+	u8 type;
+	u8 ln;
+	u8 tg;
+	u8 tgdata[];
+};
+
+/* PN532_CMD_IN_AUTOPOLL */
+#define PN532_AUTOPOLL_POLLNR_INFINITE	0xff
+#define PN532_AUTOPOLL_PERIOD		0x03 /* in units of 150 ms */
+
+#define PN532_AUTOPOLL_TYPE_GENERIC_106		0x00
+#define PN532_AUTOPOLL_TYPE_GENERIC_212		0x01
+#define PN532_AUTOPOLL_TYPE_GENERIC_424		0x02
+#define PN532_AUTOPOLL_TYPE_JEWEL		0x04
+#define PN532_AUTOPOLL_TYPE_MIFARE		0x10
+#define PN532_AUTOPOLL_TYPE_FELICA212		0x11
+#define PN532_AUTOPOLL_TYPE_FELICA424		0x12
+#define PN532_AUTOPOLL_TYPE_ISOA		0x20
+#define PN532_AUTOPOLL_TYPE_ISOB		0x23
+#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106	0x40
+#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212	0x41
+#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424	0x42
+#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106	0x80
+#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_212	0x81
+#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_424	0x82
+
+/* 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;
+	struct sk_buff *resp;
+	int status, rc = 0;
+
+	if (!cmd) {
+		dev_dbg(dev->dev, "%s: cmd not set\n", __func__);
+		goto done;
+	}
+
+	dev_kfree_skb(cmd->req);
+
+	status = cmd->status;
+	resp = cmd->resp;
+
+	if (status < 0) {
+		rc = cmd->complete_cb(dev, cmd->complete_cb_context,
+				      ERR_PTR(status));
+		dev_kfree_skb(resp);
+		goto done;
+	}
+
+	/* when no response is set we got interrupted */
+	if (!resp)
+		resp = ERR_PTR(-EINTR);
+
+	if (!IS_ERR(resp)) {
+		skb_pull(resp, dev->ops->rx_header_len);
+		skb_trim(resp, resp->len - dev->ops->rx_tail_len);
+	}
+
+	rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
+
+done:
+	kfree(cmd);
+	dev->cmd = NULL;
+	return rc;
+}
+
+static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
+			      struct sk_buff *req,
+			      pn533_send_async_complete_t complete_cb,
+			      void *complete_cb_context)
+{
+	struct pn533_cmd *cmd;
+	int rc = 0;
+
+	dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code);
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd)
+		return -ENOMEM;
+
+	cmd->code = cmd_code;
+	cmd->req = req;
+	cmd->complete_cb = complete_cb;
+	cmd->complete_cb_context = complete_cb_context;
+
+	pn533_build_cmd_frame(dev, cmd_code, req);
+
+	mutex_lock(&dev->cmd_lock);
+
+	if (!dev->cmd_pending) {
+		dev->cmd = cmd;
+		rc = dev->phy_ops->send_frame(dev, req);
+		if (rc) {
+			dev->cmd = NULL;
+			goto error;
+		}
+
+		dev->cmd_pending = 1;
+		goto unlock;
+	}
+
+	dev_dbg(dev->dev, "%s Queueing command 0x%x\n",
+		__func__, cmd_code);
+
+	INIT_LIST_HEAD(&cmd->queue);
+	list_add_tail(&cmd->queue, &dev->cmd_queue);
+
+	goto unlock;
+
+error:
+	kfree(cmd);
+unlock:
+	mutex_unlock(&dev->cmd_lock);
+	return rc;
+}
+
+static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
+				 struct sk_buff *req,
+				 pn533_send_async_complete_t complete_cb,
+				 void *complete_cb_context)
+{
+	return __pn533_send_async(dev, cmd_code, req, complete_cb,
+				complete_cb_context);
+}
+
+static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
+				struct sk_buff *req,
+				pn533_send_async_complete_t complete_cb,
+				void *complete_cb_context)
+{
+	return __pn533_send_async(dev, cmd_code, req, complete_cb,
+				complete_cb_context);
+}
+
+/*
+ * pn533_send_cmd_direct_async
+ *
+ * The function sends a priority cmd directly to the chip omitting the cmd
+ * queue. It's intended to be used by chaining mechanism of received responses
+ * where the host has to request every single chunk of data before scheduling
+ * next cmd from the queue.
+ */
+static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
+				       struct sk_buff *req,
+				       pn533_send_async_complete_t complete_cb,
+				       void *complete_cb_context)
+{
+	struct pn533_cmd *cmd;
+	int rc;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd)
+		return -ENOMEM;
+
+	cmd->code = cmd_code;
+	cmd->req = req;
+	cmd->complete_cb = complete_cb;
+	cmd->complete_cb_context = complete_cb_context;
+
+	pn533_build_cmd_frame(dev, cmd_code, req);
+
+	dev->cmd = cmd;
+	rc = dev->phy_ops->send_frame(dev, req);
+	if (rc < 0) {
+		dev->cmd = NULL;
+		kfree(cmd);
+	}
+
+	return rc;
+}
+
+static void pn533_wq_cmd_complete(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
+	int rc;
+
+	rc = pn533_send_async_complete(dev);
+	if (rc != -EINPROGRESS)
+		queue_work(dev->wq, &dev->cmd_work);
+}
+
+static void pn533_wq_cmd(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, cmd_work);
+	struct pn533_cmd *cmd;
+	int rc;
+
+	mutex_lock(&dev->cmd_lock);
+
+	if (list_empty(&dev->cmd_queue)) {
+		dev->cmd_pending = 0;
+		mutex_unlock(&dev->cmd_lock);
+		return;
+	}
+
+	cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
+
+	list_del(&cmd->queue);
+
+	mutex_unlock(&dev->cmd_lock);
+
+	dev->cmd = cmd;
+	rc = dev->phy_ops->send_frame(dev, cmd->req);
+	if (rc < 0) {
+		dev->cmd = NULL;
+		dev_kfree_skb(cmd->req);
+		kfree(cmd);
+		return;
+	}
+
+}
+
+struct pn533_sync_cmd_response {
+	struct sk_buff *resp;
+	struct completion done;
+};
+
+static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
+				    struct sk_buff *resp)
+{
+	struct pn533_sync_cmd_response *arg = _arg;
+
+	arg->resp = resp;
+	complete(&arg->done);
+
+	return 0;
+}
+
+/*  pn533_send_cmd_sync
+ *
+ *  Please note the req parameter is freed inside the function to
+ *  limit a number of return value interpretations by the caller.
+ *
+ *  1. negative in case of error during TX path -> req should be freed
+ *
+ *  2. negative in case of error during RX path -> req should not be freed
+ *     as it's been already freed at the beginning of RX path by
+ *     async_complete_cb.
+ *
+ *  3. valid pointer in case of successful RX path
+ *
+ *  A caller has to check a return value with IS_ERR macro. If the test pass,
+ *  the returned pointer is valid.
+ *
+ */
+static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
+					       struct sk_buff *req)
+{
+	int rc;
+	struct pn533_sync_cmd_response arg;
+
+	init_completion(&arg.done);
+
+	rc = pn533_send_cmd_async(dev, cmd_code, req,
+				  pn533_send_sync_complete, &arg);
+	if (rc) {
+		dev_kfree_skb(req);
+		return ERR_PTR(rc);
+	}
+
+	wait_for_completion(&arg.done);
+
+	return arg.resp;
+}
+
+static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
+{
+	struct sk_buff *skb;
+
+	skb = alloc_skb(dev->ops->tx_header_len +
+			size +
+			dev->ops->tx_tail_len, GFP_KERNEL);
+
+	if (skb)
+		skb_reserve(skb, dev->ops->tx_header_len);
+
+	return skb;
+}
+
+struct pn533_target_type_a {
+	__be16 sens_res;
+	u8 sel_res;
+	u8 nfcid_len;
+	u8 nfcid_data[];
+} __packed;
+
+
+#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
+#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
+#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
+
+#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
+#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
+
+#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
+#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
+
+#define PN533_TYPE_A_SEL_PROT_MIFARE 0
+#define PN533_TYPE_A_SEL_PROT_ISO14443 1
+#define PN533_TYPE_A_SEL_PROT_DEP 2
+#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
+
+static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
+							int target_data_len)
+{
+	u8 ssd;
+	u8 platconf;
+
+	if (target_data_len < sizeof(struct pn533_target_type_a))
+		return false;
+
+	/*
+	 * The length check of nfcid[] and ats[] are not being performed because
+	 * the values are not being used
+	 */
+
+	/* Requirement 4.6.3.3 from NFC Forum Digital Spec */
+	ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
+	platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
+
+	if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+	     platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
+	    (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+	     platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
+		return false;
+
+	/* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
+	if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
+		return false;
+
+	if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE)
+		return false;
+
+	return true;
+}
+
+static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
+							int tgt_data_len)
+{
+	struct pn533_target_type_a *tgt_type_a;
+
+	tgt_type_a = (struct pn533_target_type_a *)tgt_data;
+
+	if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
+		return -EPROTO;
+
+	switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
+	case PN533_TYPE_A_SEL_PROT_MIFARE:
+		nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
+		break;
+	case PN533_TYPE_A_SEL_PROT_ISO14443:
+		nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
+		break;
+	case PN533_TYPE_A_SEL_PROT_DEP:
+		nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+		break;
+	case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
+		nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
+							NFC_PROTO_NFC_DEP_MASK;
+		break;
+	}
+
+	nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
+	nfc_tgt->sel_res = tgt_type_a->sel_res;
+	nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
+	memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
+
+	return 0;
+}
+
+struct pn533_target_felica {
+	u8 pol_res;
+	u8 opcode;
+	u8 nfcid2[NFC_NFCID2_MAXSIZE];
+	u8 pad[8];
+	/* optional */
+	u8 syst_code[];
+} __packed;
+
+#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
+#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
+
+static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
+							int target_data_len)
+{
+	if (target_data_len < sizeof(struct pn533_target_felica))
+		return false;
+
+	if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
+		return false;
+
+	return true;
+}
+
+static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
+							int tgt_data_len)
+{
+	struct pn533_target_felica *tgt_felica;
+
+	tgt_felica = (struct pn533_target_felica *)tgt_data;
+
+	if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
+		return -EPROTO;
+
+	if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
+	    (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
+		nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+	else
+		nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
+
+	memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
+	nfc_tgt->sensf_res_len = 9;
+
+	memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
+	nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
+
+	return 0;
+}
+
+struct pn533_target_jewel {
+	__be16 sens_res;
+	u8 jewelid[4];
+} __packed;
+
+static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
+							int target_data_len)
+{
+	u8 ssd;
+	u8 platconf;
+
+	if (target_data_len < sizeof(struct pn533_target_jewel))
+		return false;
+
+	/* Requirement 4.6.3.3 from NFC Forum Digital Spec */
+	ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
+	platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
+
+	if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+	     platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
+	    (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+	     platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
+		return false;
+
+	return true;
+}
+
+static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
+							int tgt_data_len)
+{
+	struct pn533_target_jewel *tgt_jewel;
+
+	tgt_jewel = (struct pn533_target_jewel *)tgt_data;
+
+	if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
+		return -EPROTO;
+
+	nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
+	nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
+	nfc_tgt->nfcid1_len = 4;
+	memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
+
+	return 0;
+}
+
+struct pn533_type_b_prot_info {
+	u8 bitrate;
+	u8 fsci_type;
+	u8 fwi_adc_fo;
+} __packed;
+
+#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
+#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
+#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
+
+struct pn533_type_b_sens_res {
+	u8 opcode;
+	u8 nfcid[4];
+	u8 appdata[4];
+	struct pn533_type_b_prot_info prot_info;
+} __packed;
+
+#define PN533_TYPE_B_OPC_SENSB_RES 0x50
+
+struct pn533_target_type_b {
+	struct pn533_type_b_sens_res sensb_res;
+	u8 attrib_res_len;
+	u8 attrib_res[];
+} __packed;
+
+static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
+							int target_data_len)
+{
+	if (target_data_len < sizeof(struct pn533_target_type_b))
+		return false;
+
+	if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
+		return false;
+
+	if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
+						PN533_TYPE_B_PROT_TYPE_RFU_MASK)
+		return false;
+
+	return true;
+}
+
+static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
+							int tgt_data_len)
+{
+	struct pn533_target_type_b *tgt_type_b;
+
+	tgt_type_b = (struct pn533_target_type_b *)tgt_data;
+
+	if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
+		return -EPROTO;
+
+	nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
+
+	return 0;
+}
+
+static void pn533_poll_reset_mod_list(struct pn533 *dev);
+static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
+			      int tgdata_len)
+{
+	struct nfc_target nfc_tgt;
+	int rc;
+
+	dev_dbg(dev->dev, "%s: modulation=%d\n",
+		__func__, dev->poll_mod_curr);
+
+	if (tg != 1)
+		return -EPROTO;
+
+	memset(&nfc_tgt, 0, sizeof(struct nfc_target));
+
+	switch (dev->poll_mod_curr) {
+	case PN533_POLL_MOD_106KBPS_A:
+		rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
+		break;
+	case PN533_POLL_MOD_212KBPS_FELICA:
+	case PN533_POLL_MOD_424KBPS_FELICA:
+		rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
+		break;
+	case PN533_POLL_MOD_106KBPS_JEWEL:
+		rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
+		break;
+	case PN533_POLL_MOD_847KBPS_B:
+		rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
+		break;
+	default:
+		nfc_err(dev->dev,
+			"Unknown current poll modulation\n");
+		return -EPROTO;
+	}
+
+	if (rc)
+		return rc;
+
+	if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
+		dev_dbg(dev->dev,
+			"The Tg found doesn't have the desired protocol\n");
+		return -EAGAIN;
+	}
+
+	dev_dbg(dev->dev,
+		"Target found - supported protocols: 0x%x\n",
+		nfc_tgt.supported_protocols);
+
+	dev->tgt_available_prots = nfc_tgt.supported_protocols;
+
+	pn533_poll_reset_mod_list(dev);
+	nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
+
+	return 0;
+}
+
+static inline void pn533_poll_next_mod(struct pn533 *dev)
+{
+	dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
+}
+
+static void pn533_poll_reset_mod_list(struct pn533 *dev)
+{
+	dev->poll_mod_count = 0;
+}
+
+static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
+{
+	dev->poll_mod_active[dev->poll_mod_count] =
+		(struct pn533_poll_modulations *)&poll_mod[mod_index];
+	dev->poll_mod_count++;
+}
+
+static void pn533_poll_create_mod_list(struct pn533 *dev,
+				       u32 im_protocols, u32 tm_protocols)
+{
+	pn533_poll_reset_mod_list(dev);
+
+	if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
+	    (im_protocols & NFC_PROTO_ISO14443_MASK) ||
+	    (im_protocols & NFC_PROTO_NFC_DEP_MASK))
+		pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
+
+	if (im_protocols & NFC_PROTO_FELICA_MASK ||
+	    im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+		pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
+		pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
+	}
+
+	if (im_protocols & NFC_PROTO_JEWEL_MASK)
+		pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
+
+	if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
+		pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
+
+	if (tm_protocols)
+		pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
+}
+
+static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
+{
+	u8 nbtg, tg, *tgdata;
+	int rc, tgdata_len;
+
+	/* Toggle the DEP polling */
+	if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
+		dev->poll_dep = 1;
+
+	nbtg = resp->data[0];
+	tg = resp->data[1];
+	tgdata = &resp->data[2];
+	tgdata_len = resp->len - 2;  /* nbtg + tg */
+
+	if (nbtg) {
+		rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
+
+		/* We must stop the poll after a valid target found */
+		if (rc == 0)
+			return 0;
+	}
+
+	return -EAGAIN;
+}
+
+static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
+{
+	struct sk_buff *skb;
+	u8 *felica, *nfcid3;
+
+	u8 *gbytes = dev->gb;
+	size_t gbytes_len = dev->gb_len;
+
+	u8 felica_params[18] = {0x1, 0xfe, /* DEP */
+				0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
+				0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+				0xff, 0xff}; /* System code */
+
+	u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
+			       0x0, 0x0, 0x0,
+			       0x40}; /* SEL_RES for DEP */
+
+	unsigned int skb_len = 36 + /*
+				     * mode (1), mifare (6),
+				     * felica (18), nfcid3 (10), gb_len (1)
+				     */
+			       gbytes_len +
+			       1;  /* len Tk*/
+
+	skb = pn533_alloc_skb(dev, skb_len);
+	if (!skb)
+		return NULL;
+
+	/* DEP support only */
+	skb_put_u8(skb, PN533_INIT_TARGET_DEP);
+
+	/* MIFARE params */
+	skb_put_data(skb, mifare_params, 6);
+
+	/* Felica params */
+	felica = skb_put_data(skb, felica_params, 18);
+	get_random_bytes(felica + 2, 6);
+
+	/* NFCID3 */
+	nfcid3 = skb_put_zero(skb, 10);
+	memcpy(nfcid3, felica, 8);
+
+	/* General bytes */
+	skb_put_u8(skb, gbytes_len);
+
+	skb_put_data(skb, gbytes, gbytes_len);
+
+	/* Len Tk */
+	skb_put_u8(skb, 0);
+
+	return skb;
+}
+
+static void pn533_wq_tm_mi_recv(struct work_struct *work);
+static struct sk_buff *pn533_build_response(struct pn533 *dev);
+
+static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
+				      struct sk_buff *resp)
+{
+	struct sk_buff *skb;
+	u8 status, ret, mi;
+	int rc;
+
+	if (IS_ERR(resp)) {
+		skb_queue_purge(&dev->resp_q);
+		return PTR_ERR(resp);
+	}
+
+	status = resp->data[0];
+
+	ret = status & PN533_CMD_RET_MASK;
+	mi = status & PN533_CMD_MI_MASK;
+
+	skb_pull(resp, sizeof(status));
+
+	if (ret != PN533_CMD_RET_SUCCESS) {
+		rc = -EIO;
+		goto error;
+	}
+
+	skb_queue_tail(&dev->resp_q, resp);
+
+	if (mi) {
+		queue_work(dev->wq, &dev->mi_tm_rx_work);
+		return -EINPROGRESS;
+	}
+
+	skb = pn533_build_response(dev);
+	if (!skb) {
+		rc = -EIO;
+		goto error;
+	}
+
+	return nfc_tm_data_received(dev->nfc_dev, skb);
+
+error:
+	nfc_tm_deactivated(dev->nfc_dev);
+	dev->tgt_mode = 0;
+	skb_queue_purge(&dev->resp_q);
+	dev_kfree_skb(resp);
+
+	return rc;
+}
+
+static void pn533_wq_tm_mi_recv(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
+	struct sk_buff *skb;
+	int rc;
+
+	skb = pn533_alloc_skb(dev, 0);
+	if (!skb)
+		return;
+
+	rc = pn533_send_cmd_direct_async(dev,
+					PN533_CMD_TG_GET_DATA,
+					skb,
+					pn533_tm_get_data_complete,
+					NULL);
+
+	if (rc < 0)
+		dev_kfree_skb(skb);
+}
+
+static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
+				  struct sk_buff *resp);
+static void pn533_wq_tm_mi_send(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
+	struct sk_buff *skb;
+	int rc;
+
+	/* Grab the first skb in the queue */
+	skb = skb_dequeue(&dev->fragment_skb);
+	if (skb == NULL) {	/* No more data */
+		/* Reset the queue for future use */
+		skb_queue_head_init(&dev->fragment_skb);
+		goto error;
+	}
+
+	/* last entry - remove MI bit */
+	if (skb_queue_len(&dev->fragment_skb) == 0) {
+		rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
+					skb, pn533_tm_send_complete, NULL);
+	} else
+		rc = pn533_send_cmd_direct_async(dev,
+					PN533_CMD_TG_SET_META_DATA,
+					skb, pn533_tm_send_complete, NULL);
+
+	if (rc == 0) /* success */
+		return;
+
+	dev_err(dev->dev,
+		"Error %d when trying to perform set meta data_exchange", rc);
+
+	dev_kfree_skb(skb);
+
+error:
+	dev->phy_ops->send_ack(dev, GFP_KERNEL);
+	queue_work(dev->wq, &dev->cmd_work);
+}
+
+static void pn533_wq_tg_get_data(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, tg_work);
+	struct sk_buff *skb;
+	int rc;
+
+	skb = pn533_alloc_skb(dev, 0);
+	if (!skb)
+		return;
+
+	rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
+				   pn533_tm_get_data_complete, NULL);
+
+	if (rc < 0)
+		dev_kfree_skb(skb);
+}
+
+#define ATR_REQ_GB_OFFSET 17
+static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
+{
+	u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
+	size_t gb_len;
+	int rc;
+
+	if (resp->len < ATR_REQ_GB_OFFSET + 1)
+		return -EINVAL;
+
+	mode = resp->data[0];
+	cmd = &resp->data[1];
+
+	dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
+		mode, resp->len);
+
+	if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
+	    PN533_INIT_TARGET_RESP_ACTIVE)
+		comm_mode = NFC_COMM_ACTIVE;
+
+	if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
+		return -EOPNOTSUPP;
+
+	gb = cmd + ATR_REQ_GB_OFFSET;
+	gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
+
+	rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
+			      comm_mode, gb, gb_len);
+	if (rc < 0) {
+		nfc_err(dev->dev,
+			"Error when signaling target activation\n");
+		return rc;
+	}
+
+	dev->tgt_mode = 1;
+	queue_work(dev->wq, &dev->tg_work);
+
+	return 0;
+}
+
+static void pn533_listen_mode_timer(struct timer_list *t)
+{
+	struct pn533 *dev = from_timer(dev, t, listen_timer);
+
+	dev->cancel_listen = 1;
+
+	pn533_poll_next_mod(dev);
+
+	queue_delayed_work(dev->wq, &dev->poll_work,
+			   msecs_to_jiffies(PN533_POLL_INTERVAL));
+}
+
+static int pn533_rf_complete(struct pn533 *dev, void *arg,
+			     struct sk_buff *resp)
+{
+	int rc = 0;
+
+	if (IS_ERR(resp)) {
+		rc = PTR_ERR(resp);
+
+		nfc_err(dev->dev, "RF setting error %d\n", rc);
+
+		return rc;
+	}
+
+	queue_delayed_work(dev->wq, &dev->poll_work,
+			   msecs_to_jiffies(PN533_POLL_INTERVAL));
+
+	dev_kfree_skb(resp);
+	return rc;
+}
+
+static void pn533_wq_rf(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, rf_work);
+	struct sk_buff *skb;
+	int rc;
+
+	skb = pn533_alloc_skb(dev, 2);
+	if (!skb)
+		return;
+
+	skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
+	skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
+
+	rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
+				  pn533_rf_complete, NULL);
+	if (rc < 0) {
+		dev_kfree_skb(skb);
+		nfc_err(dev->dev, "RF setting error %d\n", rc);
+	}
+}
+
+static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
+				   struct sk_buff *resp)
+{
+	struct pn533_cmd_jump_dep_response *rsp;
+	struct nfc_target nfc_target;
+	u8 target_gt_len;
+	int rc;
+
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	memset(&nfc_target, 0, sizeof(struct nfc_target));
+
+	rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
+
+	rc = rsp->status & PN533_CMD_RET_MASK;
+	if (rc != PN533_CMD_RET_SUCCESS) {
+		/* Not target found, turn radio off */
+		queue_work(dev->wq, &dev->rf_work);
+
+		dev_kfree_skb(resp);
+		return 0;
+	}
+
+	dev_dbg(dev->dev, "Creating new target");
+
+	nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+	nfc_target.nfcid1_len = 10;
+	memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
+	rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
+	if (rc)
+		goto error;
+
+	dev->tgt_available_prots = 0;
+	dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
+
+	/* ATR_RES general bytes are located at offset 17 */
+	target_gt_len = resp->len - 17;
+	rc = nfc_set_remote_general_bytes(dev->nfc_dev,
+					  rsp->gt, target_gt_len);
+	if (!rc) {
+		rc = nfc_dep_link_is_up(dev->nfc_dev,
+					dev->nfc_dev->targets[0].idx,
+					0, NFC_RF_INITIATOR);
+
+		if (!rc)
+			pn533_poll_reset_mod_list(dev);
+	}
+error:
+	dev_kfree_skb(resp);
+	return rc;
+}
+
+#define PASSIVE_DATA_LEN 5
+static int pn533_poll_dep(struct nfc_dev *nfc_dev)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	struct sk_buff *skb;
+	int rc, skb_len;
+	u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
+	u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
+
+	if (!dev->gb) {
+		dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
+
+		if (!dev->gb || !dev->gb_len) {
+			dev->poll_dep = 0;
+			queue_work(dev->wq, &dev->rf_work);
+		}
+	}
+
+	skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
+	skb_len += PASSIVE_DATA_LEN;
+
+	/* NFCID3 */
+	skb_len += NFC_NFCID3_MAXSIZE;
+	nfcid3[0] = 0x1;
+	nfcid3[1] = 0xfe;
+	get_random_bytes(nfcid3 + 2, 6);
+
+	skb = pn533_alloc_skb(dev, skb_len);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_u8(skb, 0x01);  /* Active */
+	skb_put_u8(skb, 0x02);  /* 424 kbps */
+
+	next = skb_put(skb, 1);  /* Next */
+	*next = 0;
+
+	/* Copy passive data */
+	skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
+	*next |= 1;
+
+	/* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
+	skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
+	*next |= 2;
+
+	skb_put_data(skb, dev->gb, dev->gb_len);
+	*next |= 4; /* We have some Gi */
+
+	rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
+				  pn533_poll_dep_complete, NULL);
+
+	if (rc < 0)
+		dev_kfree_skb(skb);
+
+	return rc;
+}
+
+static int pn533_autopoll_complete(struct pn533 *dev, void *arg,
+			       struct sk_buff *resp)
+{
+	struct pn532_autopoll_resp *apr;
+	struct nfc_target nfc_tgt;
+	u8 nbtg;
+	int rc;
+
+	if (IS_ERR(resp)) {
+		rc = PTR_ERR(resp);
+
+		nfc_err(dev->dev, "%s  autopoll complete error %d\n",
+			__func__, rc);
+
+		if (rc == -ENOENT) {
+			if (dev->poll_mod_count != 0)
+				return rc;
+			goto stop_poll;
+		} else if (rc < 0) {
+			nfc_err(dev->dev,
+				"Error %d when running autopoll\n", rc);
+			goto stop_poll;
+		}
+	}
+
+	nbtg = resp->data[0];
+	if ((nbtg > 2) || (nbtg <= 0))
+		return -EAGAIN;
+
+	apr = (struct pn532_autopoll_resp *)&resp->data[1];
+	while (nbtg--) {
+		memset(&nfc_tgt, 0, sizeof(struct nfc_target));
+		switch (apr->type) {
+		case PN532_AUTOPOLL_TYPE_ISOA:
+			dev_dbg(dev->dev, "ISOA\n");
+			rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
+						       apr->ln - 1);
+			break;
+		case PN532_AUTOPOLL_TYPE_FELICA212:
+		case PN532_AUTOPOLL_TYPE_FELICA424:
+			dev_dbg(dev->dev, "FELICA\n");
+			rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata,
+						       apr->ln - 1);
+			break;
+		case PN532_AUTOPOLL_TYPE_JEWEL:
+			dev_dbg(dev->dev, "JEWEL\n");
+			rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata,
+						      apr->ln - 1);
+			break;
+		case PN532_AUTOPOLL_TYPE_ISOB:
+			dev_dbg(dev->dev, "ISOB\n");
+			rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata,
+						       apr->ln - 1);
+			break;
+		case PN532_AUTOPOLL_TYPE_MIFARE:
+			dev_dbg(dev->dev, "Mifare\n");
+			rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
+						       apr->ln - 1);
+			break;
+		default:
+			nfc_err(dev->dev,
+				    "Unknown current poll modulation\n");
+			rc = -EPROTO;
+		}
+
+		if (rc)
+			goto done;
+
+		if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
+			nfc_err(dev->dev,
+				    "The Tg found doesn't have the desired protocol\n");
+			rc = -EAGAIN;
+			goto done;
+		}
+
+		dev->tgt_available_prots = nfc_tgt.supported_protocols;
+		apr = (struct pn532_autopoll_resp *)
+			(apr->tgdata + (apr->ln - 1));
+	}
+
+	pn533_poll_reset_mod_list(dev);
+	nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
+
+done:
+	dev_kfree_skb(resp);
+	return rc;
+
+stop_poll:
+	nfc_err(dev->dev, "autopoll operation has been stopped\n");
+
+	pn533_poll_reset_mod_list(dev);
+	dev->poll_protocols = 0;
+	return rc;
+}
+
+static int pn533_poll_complete(struct pn533 *dev, void *arg,
+			       struct sk_buff *resp)
+{
+	struct pn533_poll_modulations *cur_mod;
+	int rc;
+
+	if (IS_ERR(resp)) {
+		rc = PTR_ERR(resp);
+
+		nfc_err(dev->dev, "%s  Poll complete error %d\n",
+			__func__, rc);
+
+		if (rc == -ENOENT) {
+			if (dev->poll_mod_count != 0)
+				return rc;
+			goto stop_poll;
+		} else if (rc < 0) {
+			nfc_err(dev->dev,
+				"Error %d when running poll\n", rc);
+			goto stop_poll;
+		}
+	}
+
+	cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
+
+	if (cur_mod->len == 0) { /* Target mode */
+		del_timer(&dev->listen_timer);
+		rc = pn533_init_target_complete(dev, resp);
+		goto done;
+	}
+
+	/* Initiator mode */
+	rc = pn533_start_poll_complete(dev, resp);
+	if (!rc)
+		goto done;
+
+	if (!dev->poll_mod_count) {
+		dev_dbg(dev->dev, "Polling has been stopped\n");
+		goto done;
+	}
+
+	pn533_poll_next_mod(dev);
+	/* Not target found, turn radio off */
+	queue_work(dev->wq, &dev->rf_work);
+
+done:
+	dev_kfree_skb(resp);
+	return rc;
+
+stop_poll:
+	nfc_err(dev->dev, "Polling operation has been stopped\n");
+
+	pn533_poll_reset_mod_list(dev);
+	dev->poll_protocols = 0;
+	return rc;
+}
+
+static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
+					struct pn533_poll_modulations *mod)
+{
+	struct sk_buff *skb;
+
+	skb = pn533_alloc_skb(dev, mod->len);
+	if (!skb)
+		return NULL;
+
+	skb_put_data(skb, &mod->data, mod->len);
+
+	return skb;
+}
+
+static int pn533_send_poll_frame(struct pn533 *dev)
+{
+	struct pn533_poll_modulations *mod;
+	struct sk_buff *skb;
+	int rc;
+	u8 cmd_code;
+
+	mod = dev->poll_mod_active[dev->poll_mod_curr];
+
+	dev_dbg(dev->dev, "%s mod len %d\n",
+		__func__, mod->len);
+
+	if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep)  {
+		dev->poll_dep = 0;
+		return pn533_poll_dep(dev->nfc_dev);
+	}
+
+	if (mod->len == 0) {  /* Listen mode */
+		cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
+		skb = pn533_alloc_poll_tg_frame(dev);
+	} else {  /* Polling mode */
+		cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
+		skb = pn533_alloc_poll_in_frame(dev, mod);
+	}
+
+	if (!skb) {
+		nfc_err(dev->dev, "Failed to allocate skb\n");
+		return -ENOMEM;
+	}
+
+	rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
+				  NULL);
+	if (rc < 0) {
+		dev_kfree_skb(skb);
+		nfc_err(dev->dev, "Polling loop error %d\n", rc);
+	}
+
+	return rc;
+}
+
+static void pn533_wq_poll(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
+	struct pn533_poll_modulations *cur_mod;
+	int rc;
+
+	cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
+
+	dev_dbg(dev->dev,
+		"%s cancel_listen %d modulation len %d\n",
+		__func__, dev->cancel_listen, cur_mod->len);
+
+	if (dev->cancel_listen == 1) {
+		dev->cancel_listen = 0;
+		dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
+	}
+
+	rc = pn533_send_poll_frame(dev);
+	if (rc)
+		return;
+
+	if (cur_mod->len == 0 && dev->poll_mod_count > 1)
+		mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
+}
+
+static int pn533_start_poll(struct nfc_dev *nfc_dev,
+			    u32 im_protocols, u32 tm_protocols)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	struct pn533_poll_modulations *cur_mod;
+	struct sk_buff *skb;
+	u8 rand_mod;
+	int rc;
+
+	dev_dbg(dev->dev,
+		"%s: im protocols 0x%x tm protocols 0x%x\n",
+		__func__, im_protocols, tm_protocols);
+
+	if (dev->tgt_active_prot) {
+		nfc_err(dev->dev,
+			"Cannot poll with a target already activated\n");
+		return -EBUSY;
+	}
+
+	if (dev->tgt_mode) {
+		nfc_err(dev->dev,
+			"Cannot poll while already being activated\n");
+		return -EBUSY;
+	}
+
+	if (tm_protocols) {
+		dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
+		if (dev->gb == NULL)
+			tm_protocols = 0;
+	}
+
+	dev->poll_protocols = im_protocols;
+	dev->listen_protocols = tm_protocols;
+	if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) {
+		skb = pn533_alloc_skb(dev, 4 + 6);
+		if (!skb)
+			return -ENOMEM;
+
+		*((u8 *)skb_put(skb, sizeof(u8))) =
+			PN532_AUTOPOLL_POLLNR_INFINITE;
+		*((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD;
+
+		if ((im_protocols & NFC_PROTO_MIFARE_MASK) &&
+				(im_protocols & NFC_PROTO_ISO14443_MASK) &&
+				(im_protocols & NFC_PROTO_NFC_DEP_MASK))
+			*((u8 *)skb_put(skb, sizeof(u8))) =
+				PN532_AUTOPOLL_TYPE_GENERIC_106;
+		else {
+			if (im_protocols & NFC_PROTO_MIFARE_MASK)
+				*((u8 *)skb_put(skb, sizeof(u8))) =
+					PN532_AUTOPOLL_TYPE_MIFARE;
+
+			if (im_protocols & NFC_PROTO_ISO14443_MASK)
+				*((u8 *)skb_put(skb, sizeof(u8))) =
+					PN532_AUTOPOLL_TYPE_ISOA;
+
+			if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+				*((u8 *)skb_put(skb, sizeof(u8))) =
+					PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
+				*((u8 *)skb_put(skb, sizeof(u8))) =
+					PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
+				*((u8 *)skb_put(skb, sizeof(u8))) =
+					PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424;
+			}
+		}
+
+		if (im_protocols & NFC_PROTO_FELICA_MASK ||
+				im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+			*((u8 *)skb_put(skb, sizeof(u8))) =
+				PN532_AUTOPOLL_TYPE_FELICA212;
+			*((u8 *)skb_put(skb, sizeof(u8))) =
+				PN532_AUTOPOLL_TYPE_FELICA424;
+		}
+
+		if (im_protocols & NFC_PROTO_JEWEL_MASK)
+			*((u8 *)skb_put(skb, sizeof(u8))) =
+				PN532_AUTOPOLL_TYPE_JEWEL;
+
+		if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
+			*((u8 *)skb_put(skb, sizeof(u8))) =
+				PN532_AUTOPOLL_TYPE_ISOB;
+
+		if (tm_protocols)
+			*((u8 *)skb_put(skb, sizeof(u8))) =
+				PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
+
+		rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
+				pn533_autopoll_complete, NULL);
+
+		if (rc < 0)
+			dev_kfree_skb(skb);
+		else
+			dev->poll_mod_count++;
+
+		return rc;
+	}
+
+	pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
+
+	/* Do not always start polling from the same modulation */
+	get_random_bytes(&rand_mod, sizeof(rand_mod));
+	rand_mod %= dev->poll_mod_count;
+	dev->poll_mod_curr = rand_mod;
+
+	cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
+
+	rc = pn533_send_poll_frame(dev);
+
+	/* Start listen timer */
+	if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
+		mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
+
+	return rc;
+}
+
+static void pn533_stop_poll(struct nfc_dev *nfc_dev)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+
+	del_timer(&dev->listen_timer);
+
+	if (!dev->poll_mod_count) {
+		dev_dbg(dev->dev,
+			"Polling operation was not running\n");
+		return;
+	}
+
+	dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
+	flush_delayed_work(&dev->poll_work);
+	pn533_poll_reset_mod_list(dev);
+}
+
+static int pn533_activate_target_nfcdep(struct pn533 *dev)
+{
+	struct pn533_cmd_activate_response *rsp;
+	u16 gt_len;
+	int rc;
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+
+	skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_u8(skb, 1); /* TG */
+	skb_put_u8(skb, 0); /* Next */
+
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	rsp = (struct pn533_cmd_activate_response *)resp->data;
+	rc = rsp->status & PN533_CMD_RET_MASK;
+	if (rc != PN533_CMD_RET_SUCCESS) {
+		nfc_err(dev->dev,
+			"Target activation failed (error 0x%x)\n", rc);
+		dev_kfree_skb(resp);
+		return -EIO;
+	}
+
+	/* ATR_RES general bytes are located at offset 16 */
+	gt_len = resp->len - 16;
+	rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
+
+	dev_kfree_skb(resp);
+	return rc;
+}
+
+static int pn533_activate_target(struct nfc_dev *nfc_dev,
+				 struct nfc_target *target, u32 protocol)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	int rc;
+
+	dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
+
+	if (dev->poll_mod_count) {
+		nfc_err(dev->dev,
+			"Cannot activate while polling\n");
+		return -EBUSY;
+	}
+
+	if (dev->tgt_active_prot) {
+		nfc_err(dev->dev,
+			"There is already an active target\n");
+		return -EBUSY;
+	}
+
+	if (!dev->tgt_available_prots) {
+		nfc_err(dev->dev,
+			"There is no available target to activate\n");
+		return -EINVAL;
+	}
+
+	if (!(dev->tgt_available_prots & (1 << protocol))) {
+		nfc_err(dev->dev,
+			"Target doesn't support requested proto %u\n",
+			protocol);
+		return -EINVAL;
+	}
+
+	if (protocol == NFC_PROTO_NFC_DEP) {
+		rc = pn533_activate_target_nfcdep(dev);
+		if (rc) {
+			nfc_err(dev->dev,
+				"Activating target with DEP failed %d\n", rc);
+			return rc;
+		}
+	}
+
+	dev->tgt_active_prot = protocol;
+	dev->tgt_available_prots = 0;
+
+	return 0;
+}
+
+static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
+			     struct sk_buff *resp)
+{
+	int rc = 0;
+
+	if (IS_ERR(resp)) {
+		rc = PTR_ERR(resp);
+
+		nfc_err(dev->dev, "Target release error %d\n", rc);
+
+		return rc;
+	}
+
+	rc = resp->data[0] & PN533_CMD_RET_MASK;
+	if (rc != PN533_CMD_RET_SUCCESS)
+		nfc_err(dev->dev,
+			"Error 0x%x when releasing the target\n", rc);
+
+	dev_kfree_skb(resp);
+	return rc;
+}
+
+static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
+				    struct nfc_target *target, u8 mode)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	struct sk_buff *skb;
+	int rc;
+
+	if (!dev->tgt_active_prot) {
+		nfc_err(dev->dev, "There is no active target\n");
+		return;
+	}
+
+	dev->tgt_active_prot = 0;
+	skb_queue_purge(&dev->resp_q);
+
+	skb = pn533_alloc_skb(dev, sizeof(u8));
+	if (!skb)
+		return;
+
+	skb_put_u8(skb, 1); /* TG*/
+
+	rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
+				  pn533_deactivate_target_complete, NULL);
+	if (rc < 0) {
+		dev_kfree_skb(skb);
+		nfc_err(dev->dev, "Target release error %d\n", rc);
+	}
+}
+
+
+static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
+					 struct sk_buff *resp)
+{
+	struct pn533_cmd_jump_dep_response *rsp;
+	u8 target_gt_len;
+	int rc;
+	u8 active = *(u8 *)arg;
+
+	kfree(arg);
+
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	if (dev->tgt_available_prots &&
+	    !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
+		nfc_err(dev->dev,
+			"The target does not support DEP\n");
+		rc =  -EINVAL;
+		goto error;
+	}
+
+	rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
+
+	rc = rsp->status & PN533_CMD_RET_MASK;
+	if (rc != PN533_CMD_RET_SUCCESS) {
+		nfc_err(dev->dev,
+			"Bringing DEP link up failed (error 0x%x)\n", rc);
+		goto error;
+	}
+
+	if (!dev->tgt_available_prots) {
+		struct nfc_target nfc_target;
+
+		dev_dbg(dev->dev, "Creating new target\n");
+
+		memset(&nfc_target, 0, sizeof(struct nfc_target));
+
+		nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+		nfc_target.nfcid1_len = 10;
+		memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
+		rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
+		if (rc)
+			goto error;
+
+		dev->tgt_available_prots = 0;
+	}
+
+	dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
+
+	/* ATR_RES general bytes are located at offset 17 */
+	target_gt_len = resp->len - 17;
+	rc = nfc_set_remote_general_bytes(dev->nfc_dev,
+					  rsp->gt, target_gt_len);
+	if (rc == 0)
+		rc = nfc_dep_link_is_up(dev->nfc_dev,
+					dev->nfc_dev->targets[0].idx,
+					!active, NFC_RF_INITIATOR);
+
+error:
+	dev_kfree_skb(resp);
+	return rc;
+}
+
+static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
+static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
+			     u8 comm_mode, u8 *gb, size_t gb_len)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	struct sk_buff *skb;
+	int rc, skb_len;
+	u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
+	u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
+
+	if (dev->poll_mod_count) {
+		nfc_err(dev->dev,
+			"Cannot bring the DEP link up while polling\n");
+		return -EBUSY;
+	}
+
+	if (dev->tgt_active_prot) {
+		nfc_err(dev->dev,
+			"There is already an active target\n");
+		return -EBUSY;
+	}
+
+	skb_len = 3 + gb_len; /* ActPass + BR + Next */
+	skb_len += PASSIVE_DATA_LEN;
+
+	/* NFCID3 */
+	skb_len += NFC_NFCID3_MAXSIZE;
+	if (target && !target->nfcid2_len) {
+		nfcid3[0] = 0x1;
+		nfcid3[1] = 0xfe;
+		get_random_bytes(nfcid3 + 2, 6);
+	}
+
+	skb = pn533_alloc_skb(dev, skb_len);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_u8(skb, !comm_mode);  /* ActPass */
+	skb_put_u8(skb, 0x02);  /* 424 kbps */
+
+	next = skb_put(skb, 1);  /* Next */
+	*next = 0;
+
+	/* Copy passive data */
+	skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
+	*next |= 1;
+
+	/* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
+	if (target && target->nfcid2_len)
+		memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
+		       target->nfcid2_len);
+	else
+		skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
+	*next |= 2;
+
+	if (gb != NULL && gb_len > 0) {
+		skb_put_data(skb, gb, gb_len);
+		*next |= 4; /* We have some Gi */
+	} else {
+		*next = 0;
+	}
+
+	arg = kmalloc(sizeof(*arg), GFP_KERNEL);
+	if (!arg) {
+		dev_kfree_skb(skb);
+		return -ENOMEM;
+	}
+
+	*arg = !comm_mode;
+
+	pn533_rf_field(dev->nfc_dev, 0);
+
+	rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
+				  pn533_in_dep_link_up_complete, arg);
+
+	if (rc < 0) {
+		dev_kfree_skb(skb);
+		kfree(arg);
+	}
+
+	return rc;
+}
+
+static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+
+	pn533_poll_reset_mod_list(dev);
+
+	if (dev->tgt_mode || dev->tgt_active_prot)
+		dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
+
+	dev->tgt_active_prot = 0;
+	dev->tgt_mode = 0;
+
+	skb_queue_purge(&dev->resp_q);
+
+	return 0;
+}
+
+struct pn533_data_exchange_arg {
+	data_exchange_cb_t cb;
+	void *cb_context;
+};
+
+static struct sk_buff *pn533_build_response(struct pn533 *dev)
+{
+	struct sk_buff *skb, *tmp, *t;
+	unsigned int skb_len = 0, tmp_len = 0;
+
+	if (skb_queue_empty(&dev->resp_q))
+		return NULL;
+
+	if (skb_queue_len(&dev->resp_q) == 1) {
+		skb = skb_dequeue(&dev->resp_q);
+		goto out;
+	}
+
+	skb_queue_walk_safe(&dev->resp_q, tmp, t)
+		skb_len += tmp->len;
+
+	dev_dbg(dev->dev, "%s total length %d\n",
+		__func__, skb_len);
+
+	skb = alloc_skb(skb_len, GFP_KERNEL);
+	if (skb == NULL)
+		goto out;
+
+	skb_put(skb, skb_len);
+
+	skb_queue_walk_safe(&dev->resp_q, tmp, t) {
+		memcpy(skb->data + tmp_len, tmp->data, tmp->len);
+		tmp_len += tmp->len;
+	}
+
+out:
+	skb_queue_purge(&dev->resp_q);
+
+	return skb;
+}
+
+static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
+					struct sk_buff *resp)
+{
+	struct pn533_data_exchange_arg *arg = _arg;
+	struct sk_buff *skb;
+	int rc = 0;
+	u8 status, ret, mi;
+
+	if (IS_ERR(resp)) {
+		rc = PTR_ERR(resp);
+		goto _error;
+	}
+
+	status = resp->data[0];
+	ret = status & PN533_CMD_RET_MASK;
+	mi = status & PN533_CMD_MI_MASK;
+
+	skb_pull(resp, sizeof(status));
+
+	if (ret != PN533_CMD_RET_SUCCESS) {
+		nfc_err(dev->dev,
+			"Exchanging data failed (error 0x%x)\n", ret);
+		rc = -EIO;
+		goto error;
+	}
+
+	skb_queue_tail(&dev->resp_q, resp);
+
+	if (mi) {
+		dev->cmd_complete_mi_arg = arg;
+		queue_work(dev->wq, &dev->mi_rx_work);
+		return -EINPROGRESS;
+	}
+
+	/* Prepare for the next round */
+	if (skb_queue_len(&dev->fragment_skb) > 0) {
+		dev->cmd_complete_dep_arg = arg;
+		queue_work(dev->wq, &dev->mi_tx_work);
+
+		return -EINPROGRESS;
+	}
+
+	skb = pn533_build_response(dev);
+	if (!skb) {
+		rc = -ENOMEM;
+		goto error;
+	}
+
+	arg->cb(arg->cb_context, skb, 0);
+	kfree(arg);
+	return 0;
+
+error:
+	dev_kfree_skb(resp);
+_error:
+	skb_queue_purge(&dev->resp_q);
+	arg->cb(arg->cb_context, NULL, rc);
+	kfree(arg);
+	return rc;
+}
+
+/*
+ * Receive an incoming pn533 frame. skb contains only header and payload.
+ * If skb == NULL, it is a notification that the link below is dead.
+ */
+void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
+{
+	if (!dev->cmd)
+		goto sched_wq;
+
+	dev->cmd->status = status;
+
+	if (status != 0) {
+		dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
+		goto sched_wq;
+	}
+
+	if (skb == NULL) {
+		dev_err(dev->dev, "NULL Frame -> link is dead\n");
+		goto sched_wq;
+	}
+
+	if (pn533_rx_frame_is_ack(skb->data)) {
+		dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
+			     dev->ops->rx_frame_size(skb->data), false);
+
+	if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
+		nfc_err(dev->dev, "Received an invalid frame\n");
+		dev->cmd->status = -EIO;
+	} else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
+		nfc_err(dev->dev, "It it not the response to the last command\n");
+		dev->cmd->status = -EIO;
+	}
+
+	dev->cmd->resp = skb;
+
+sched_wq:
+	queue_work(dev->wq, &dev->cmd_complete_work);
+}
+EXPORT_SYMBOL(pn533_recv_frame);
+
+/* Split the Tx skb into small chunks */
+static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
+{
+	struct sk_buff *frag;
+	int  frag_size;
+
+	do {
+		/* Remaining size */
+		if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
+			frag_size = PN533_CMD_DATAFRAME_MAXLEN;
+		else
+			frag_size = skb->len;
+
+		/* Allocate and reserve */
+		frag = pn533_alloc_skb(dev, frag_size);
+		if (!frag) {
+			skb_queue_purge(&dev->fragment_skb);
+			return -ENOMEM;
+		}
+
+		if (!dev->tgt_mode) {
+			/* Reserve the TG/MI byte */
+			skb_reserve(frag, 1);
+
+			/* MI + TG */
+			if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
+				*(u8 *)skb_push(frag, sizeof(u8)) =
+						(PN533_CMD_MI_MASK | 1);
+			else
+				*(u8 *)skb_push(frag, sizeof(u8)) =  1; /* TG */
+		}
+
+		skb_put_data(frag, skb->data, frag_size);
+
+		/* Reduce the size of incoming buffer */
+		skb_pull(skb, frag_size);
+
+		/* Add this to skb_queue */
+		skb_queue_tail(&dev->fragment_skb, frag);
+
+	} while (skb->len > 0);
+
+	dev_kfree_skb(skb);
+
+	return skb_queue_len(&dev->fragment_skb);
+}
+
+static int pn533_transceive(struct nfc_dev *nfc_dev,
+			    struct nfc_target *target, struct sk_buff *skb,
+			    data_exchange_cb_t cb, void *cb_context)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	struct pn533_data_exchange_arg *arg = NULL;
+	int rc;
+
+	if (!dev->tgt_active_prot) {
+		nfc_err(dev->dev,
+			"Can't exchange data if there is no active target\n");
+		rc = -EINVAL;
+		goto error;
+	}
+
+	arg = kmalloc(sizeof(*arg), GFP_KERNEL);
+	if (!arg) {
+		rc = -ENOMEM;
+		goto error;
+	}
+
+	arg->cb = cb;
+	arg->cb_context = cb_context;
+
+	switch (dev->device_type) {
+	case PN533_DEVICE_PASORI:
+		if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
+			rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
+						   skb,
+						   pn533_data_exchange_complete,
+						   arg);
+
+			break;
+		}
+		fallthrough;
+	default:
+		/* jumbo frame ? */
+		if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
+			rc = pn533_fill_fragment_skbs(dev, skb);
+			if (rc < 0)
+				goto error;
+
+			skb = skb_dequeue(&dev->fragment_skb);
+			if (!skb) {
+				rc = -EIO;
+				goto error;
+			}
+		} else {
+			*(u8 *)skb_push(skb, sizeof(u8)) =  1; /* TG */
+		}
+
+		rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
+					   skb, pn533_data_exchange_complete,
+					   arg);
+
+		break;
+	}
+
+	if (rc < 0) /* rc from send_async */
+		goto error;
+
+	return 0;
+
+error:
+	kfree(arg);
+	dev_kfree_skb(skb);
+	return rc;
+}
+
+static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
+				  struct sk_buff *resp)
+{
+	u8 status;
+
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	status = resp->data[0];
+
+	/* Prepare for the next round */
+	if (skb_queue_len(&dev->fragment_skb) > 0) {
+		queue_work(dev->wq, &dev->mi_tm_tx_work);
+		return -EINPROGRESS;
+	}
+	dev_kfree_skb(resp);
+
+	if (status != 0) {
+		nfc_tm_deactivated(dev->nfc_dev);
+
+		dev->tgt_mode = 0;
+
+		return 0;
+	}
+
+	queue_work(dev->wq, &dev->tg_work);
+
+	return 0;
+}
+
+static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	int rc;
+
+	/* let's split in multiple chunks if size's too big */
+	if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
+		rc = pn533_fill_fragment_skbs(dev, skb);
+		if (rc < 0)
+			goto error;
+
+		/* get the first skb */
+		skb = skb_dequeue(&dev->fragment_skb);
+		if (!skb) {
+			rc = -EIO;
+			goto error;
+		}
+
+		rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
+						pn533_tm_send_complete, NULL);
+	} else {
+		/* Send th skb */
+		rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
+						pn533_tm_send_complete, NULL);
+	}
+
+error:
+	if (rc < 0) {
+		dev_kfree_skb(skb);
+		skb_queue_purge(&dev->fragment_skb);
+	}
+
+	return rc;
+}
+
+static void pn533_wq_mi_recv(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
+	struct sk_buff *skb;
+	int rc;
+
+	skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
+	if (!skb)
+		goto error;
+
+	switch (dev->device_type) {
+	case PN533_DEVICE_PASORI:
+		if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
+			rc = pn533_send_cmd_direct_async(dev,
+						PN533_CMD_IN_COMM_THRU,
+						skb,
+						pn533_data_exchange_complete,
+						 dev->cmd_complete_mi_arg);
+
+			break;
+		}
+		fallthrough;
+	default:
+		skb_put_u8(skb, 1); /*TG*/
+
+		rc = pn533_send_cmd_direct_async(dev,
+						 PN533_CMD_IN_DATA_EXCHANGE,
+						 skb,
+						 pn533_data_exchange_complete,
+						 dev->cmd_complete_mi_arg);
+
+		break;
+	}
+
+	if (rc == 0) /* success */
+		return;
+
+	nfc_err(dev->dev,
+		"Error %d when trying to perform data_exchange\n", rc);
+
+	dev_kfree_skb(skb);
+	kfree(dev->cmd_complete_mi_arg);
+
+error:
+	dev->phy_ops->send_ack(dev, GFP_KERNEL);
+	queue_work(dev->wq, &dev->cmd_work);
+}
+
+static void pn533_wq_mi_send(struct work_struct *work)
+{
+	struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
+	struct sk_buff *skb;
+	int rc;
+
+	/* Grab the first skb in the queue */
+	skb = skb_dequeue(&dev->fragment_skb);
+
+	if (skb == NULL) {	/* No more data */
+		/* Reset the queue for future use */
+		skb_queue_head_init(&dev->fragment_skb);
+		goto error;
+	}
+
+	switch (dev->device_type) {
+	case PN533_DEVICE_PASORI:
+		if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
+			rc = -EIO;
+			break;
+		}
+
+		rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
+						 skb,
+						 pn533_data_exchange_complete,
+						 dev->cmd_complete_dep_arg);
+
+		break;
+
+	default:
+		/* Still some fragments? */
+		rc = pn533_send_cmd_direct_async(dev,
+						 PN533_CMD_IN_DATA_EXCHANGE,
+						 skb,
+						 pn533_data_exchange_complete,
+						 dev->cmd_complete_dep_arg);
+
+		break;
+	}
+
+	if (rc == 0) /* success */
+		return;
+
+	nfc_err(dev->dev,
+		"Error %d when trying to perform data_exchange\n", rc);
+
+	dev_kfree_skb(skb);
+	kfree(dev->cmd_complete_dep_arg);
+
+error:
+	dev->phy_ops->send_ack(dev, GFP_KERNEL);
+	queue_work(dev->wq, &dev->cmd_work);
+}
+
+static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
+								u8 cfgdata_len)
+{
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+	int skb_len;
+
+	skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
+
+	skb = pn533_alloc_skb(dev, skb_len);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_u8(skb, cfgitem);
+	skb_put_data(skb, cfgdata, cfgdata_len);
+
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	dev_kfree_skb(resp);
+	return 0;
+}
+
+static int pn533_get_firmware_version(struct pn533 *dev,
+				      struct pn533_fw_version *fv)
+{
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+
+	skb = pn533_alloc_skb(dev, 0);
+	if (!skb)
+		return -ENOMEM;
+
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	fv->ic = resp->data[0];
+	fv->ver = resp->data[1];
+	fv->rev = resp->data[2];
+	fv->support = resp->data[3];
+
+	dev_kfree_skb(resp);
+	return 0;
+}
+
+static int pn533_pasori_fw_reset(struct pn533 *dev)
+{
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+
+	skb = pn533_alloc_skb(dev, sizeof(u8));
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_u8(skb, 0x1);
+
+	resp = pn533_send_cmd_sync(dev, 0x18, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	dev_kfree_skb(resp);
+
+	return 0;
+}
+
+static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	u8 rf_field = !!rf;
+	int rc;
+
+	rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
+
+	rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
+				     (u8 *)&rf_field, 1);
+	if (rc) {
+		nfc_err(dev->dev, "Error on setting RF field\n");
+		return rc;
+	}
+
+	return 0;
+}
+
+static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+
+	skb = pn533_alloc_skb(dev, 1);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_u8(skb, 0x01);
+
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	dev_kfree_skb(resp);
+	return 0;
+}
+
+static int pn533_dev_up(struct nfc_dev *nfc_dev)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	int rc;
+
+	if (dev->phy_ops->dev_up) {
+		rc = dev->phy_ops->dev_up(dev);
+		if (rc)
+			return rc;
+	}
+
+	if ((dev->device_type == PN533_DEVICE_PN532) ||
+		(dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
+		rc = pn532_sam_configuration(nfc_dev);
+
+		if (rc)
+			return rc;
+	}
+
+	return pn533_rf_field(nfc_dev, 1);
+}
+
+static int pn533_dev_down(struct nfc_dev *nfc_dev)
+{
+	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+	int ret;
+
+	ret = pn533_rf_field(nfc_dev, 0);
+	if (dev->phy_ops->dev_down && !ret)
+		ret = dev->phy_ops->dev_down(dev);
+
+	return ret;
+}
+
+static const struct nfc_ops pn533_nfc_ops = {
+	.dev_up = pn533_dev_up,
+	.dev_down = pn533_dev_down,
+	.dep_link_up = pn533_dep_link_up,
+	.dep_link_down = pn533_dep_link_down,
+	.start_poll = pn533_start_poll,
+	.stop_poll = pn533_stop_poll,
+	.activate_target = pn533_activate_target,
+	.deactivate_target = pn533_deactivate_target,
+	.im_transceive = pn533_transceive,
+	.tm_send = pn533_tm_send,
+};
+
+static int pn533_setup(struct pn533 *dev)
+{
+	struct pn533_config_max_retries max_retries;
+	struct pn533_config_timing timing;
+	u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
+	int rc;
+
+	switch (dev->device_type) {
+	case PN533_DEVICE_STD:
+	case PN533_DEVICE_PASORI:
+	case PN533_DEVICE_ACR122U:
+	case PN533_DEVICE_PN532:
+	case PN533_DEVICE_PN532_AUTOPOLL:
+		max_retries.mx_rty_atr = 0x2;
+		max_retries.mx_rty_psl = 0x1;
+		max_retries.mx_rty_passive_act =
+			PN533_CONFIG_MAX_RETRIES_NO_RETRY;
+
+		timing.rfu = PN533_CONFIG_TIMING_102;
+		timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
+		timing.dep_timeout = PN533_CONFIG_TIMING_204;
+
+		break;
+
+	default:
+		nfc_err(dev->dev, "Unknown device type %d\n",
+			dev->device_type);
+		return -EINVAL;
+	}
+
+	rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
+				     (u8 *)&max_retries, sizeof(max_retries));
+	if (rc) {
+		nfc_err(dev->dev,
+			"Error on setting MAX_RETRIES config\n");
+		return rc;
+	}
+
+
+	rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
+				     (u8 *)&timing, sizeof(timing));
+	if (rc) {
+		nfc_err(dev->dev, "Error on setting RF timings\n");
+		return rc;
+	}
+
+	switch (dev->device_type) {
+	case PN533_DEVICE_STD:
+	case PN533_DEVICE_PN532:
+	case PN533_DEVICE_PN532_AUTOPOLL:
+		break;
+
+	case PN533_DEVICE_PASORI:
+		pn533_pasori_fw_reset(dev);
+
+		rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
+					     pasori_cfg, 3);
+		if (rc) {
+			nfc_err(dev->dev,
+				"Error while settings PASORI config\n");
+			return rc;
+		}
+
+		pn533_pasori_fw_reset(dev);
+
+		break;
+	}
+
+	return 0;
+}
+
+int pn533_finalize_setup(struct pn533 *dev)
+{
+
+	struct pn533_fw_version fw_ver;
+	int rc;
+
+	memset(&fw_ver, 0, sizeof(fw_ver));
+
+	rc = pn533_get_firmware_version(dev, &fw_ver);
+	if (rc) {
+		nfc_err(dev->dev, "Unable to get FW version\n");
+		return rc;
+	}
+
+	nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
+		fw_ver.ic, fw_ver.ver, fw_ver.rev);
+
+	rc = pn533_setup(dev);
+	if (rc)
+		return rc;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pn533_finalize_setup);
+
+struct pn533 *pn53x_common_init(u32 device_type,
+				enum pn533_protocol_type protocol_type,
+				void *phy,
+				const struct pn533_phy_ops *phy_ops,
+				struct pn533_frame_ops *fops,
+				struct device *dev)
+{
+	struct pn533 *priv;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return ERR_PTR(-ENOMEM);
+
+	priv->phy = phy;
+	priv->phy_ops = phy_ops;
+	priv->dev = dev;
+	if (fops != NULL)
+		priv->ops = fops;
+	else
+		priv->ops = &pn533_std_frame_ops;
+
+	priv->protocol_type = protocol_type;
+	priv->device_type = device_type;
+
+	mutex_init(&priv->cmd_lock);
+
+	INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
+	INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
+	INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
+	INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
+	INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
+	INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
+	INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
+	INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
+	INIT_WORK(&priv->rf_work, pn533_wq_rf);
+	priv->wq = alloc_ordered_workqueue("pn533", 0);
+	if (priv->wq == NULL)
+		goto error;
+
+	timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
+
+	skb_queue_head_init(&priv->resp_q);
+	skb_queue_head_init(&priv->fragment_skb);
+
+	INIT_LIST_HEAD(&priv->cmd_queue);
+	return priv;
+
+error:
+	kfree(priv);
+	return ERR_PTR(-ENOMEM);
+}
+EXPORT_SYMBOL_GPL(pn53x_common_init);
+
+void pn53x_common_clean(struct pn533 *priv)
+{
+	struct pn533_cmd *cmd, *n;
+
+	/* delete the timer before cleanup the worker */
+	del_timer_sync(&priv->listen_timer);
+
+	flush_delayed_work(&priv->poll_work);
+	destroy_workqueue(priv->wq);
+
+	skb_queue_purge(&priv->resp_q);
+
+	list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
+		list_del(&cmd->queue);
+		kfree(cmd);
+	}
+
+	kfree(priv);
+}
+EXPORT_SYMBOL_GPL(pn53x_common_clean);
+
+int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
+			struct device *parent)
+{
+	priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
+					   priv->ops->tx_header_len +
+					   PN533_CMD_DATAEXCH_HEAD_LEN,
+					   priv->ops->tx_tail_len);
+	if (!priv->nfc_dev)
+		return -ENOMEM;
+
+	nfc_set_parent_dev(priv->nfc_dev, parent);
+	nfc_set_drvdata(priv->nfc_dev, priv);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
+
+int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
+			struct device *parent)
+{
+	int rc;
+
+	rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
+	if (rc)
+		return rc;
+
+	rc = nfc_register_device(priv->nfc_dev);
+	if (rc)
+		nfc_free_device(priv->nfc_dev);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(pn53x_register_nfc);
+
+void pn53x_unregister_nfc(struct pn533 *priv)
+{
+	nfc_unregister_device(priv->nfc_dev);
+	nfc_free_device(priv->nfc_dev);
+}
+EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
+
+MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
+MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
+MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
+MODULE_DESCRIPTION("PN533 driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
diff --git a/drivers/nfc/pn533/pn533.h b/drivers/nfc/pn533/pn533.h
new file mode 100644
index 000000000..09e35b869
--- /dev/null
+++ b/drivers/nfc/pn533/pn533.h
@@ -0,0 +1,249 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Driver for NXP PN533 NFC Chip
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ */
+
+#define PN533_DEVICE_STD		0x1
+#define PN533_DEVICE_PASORI		0x2
+#define PN533_DEVICE_ACR122U		0x3
+#define PN533_DEVICE_PN532		0x4
+#define PN533_DEVICE_PN532_AUTOPOLL	0x5
+
+#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
+
+
+/* Preamble (1), SoPC (2), ACK Code (2), Postamble (1) */
+#define PN533_STD_FRAME_ACK_SIZE 6
+/*
+ * Preamble (1), SoPC (2), Packet Length (1), Packet Length Checksum (1),
+ * Specific Application Level Error Code (1) , Postamble (1)
+ */
+#define PN533_STD_ERROR_FRAME_SIZE 8
+#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_SAM_CONFIGURATION 0x14
+#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_IN_AUTOPOLL 0x60
+
+#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
+
+#define PN533_FRAME_DATALEN_ACK 0x00
+#define PN533_FRAME_DATALEN_ERROR 0x01
+#define PN533_FRAME_DATALEN_EXTENDED 0xFF
+
+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;
+	const 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);
+	/*
+	 * dev_up and dev_down are optional.
+	 * They are used to inform the phy layer that the nfc chip
+	 * is going to be really used very soon. The phy layer can then
+	 * bring up it's interface to the chip and have it suspended for power
+	 * saving reasons otherwise.
+	 */
+	int (*dev_up)(struct pn533 *priv);
+	int (*dev_down)(struct pn533 *priv);
+};
+
+
+struct pn533 *pn53x_common_init(u32 device_type,
+				enum pn533_protocol_type protocol_type,
+				void *phy,
+				const struct pn533_phy_ops *phy_ops,
+				struct pn533_frame_ops *fops,
+				struct device *dev);
+
+int pn533_finalize_setup(struct pn533 *dev);
+void pn53x_common_clean(struct pn533 *priv);
+void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status);
+int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
+			struct device *parent);
+int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
+			struct device *parent);
+void pn53x_unregister_nfc(struct pn533 *priv);
+
+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/uart.c b/drivers/nfc/pn533/uart.c
new file mode 100644
index 000000000..07596bf5f
--- /dev/null
+++ b/drivers/nfc/pn533/uart.c
@@ -0,0 +1,331 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for NXP PN532 NFC Chip - UART transport layer
+ *
+ * Copyright (C) 2018 Lemonage Software GmbH
+ * Author: Lars Pöschel <poeschel@lemonage.de>
+ * All rights reserved.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/nfc.h>
+#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/serdev.h>
+#include "pn533.h"
+
+#define PN532_UART_SKB_BUFF_LEN	(PN533_CMD_DATAEXCH_DATA_MAXLEN * 2)
+
+enum send_wakeup {
+	PN532_SEND_NO_WAKEUP = 0,
+	PN532_SEND_WAKEUP,
+	PN532_SEND_LAST_WAKEUP,
+};
+
+
+struct pn532_uart_phy {
+	struct serdev_device *serdev;
+	struct sk_buff *recv_skb;
+	struct pn533 *priv;
+	/*
+	 * send_wakeup variable is used to control if we need to send a wakeup
+	 * request to the pn532 chip prior to our actual command. There is a
+	 * little propability of a race condition. We decided to not mutex the
+	 * variable as the worst that could happen is, that we send a wakeup
+	 * to the chip that is already awake. This does not hurt. It is a
+	 * no-op to the chip.
+	 */
+	enum send_wakeup send_wakeup;
+	struct timer_list cmd_timeout;
+	struct sk_buff *cur_out_buf;
+};
+
+static int pn532_uart_send_frame(struct pn533 *dev,
+				struct sk_buff *out)
+{
+	/* wakeup sequence and dummy bytes for waiting time */
+	static const u8 wakeup[] = {
+		0x55, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+	struct pn532_uart_phy *pn532 = dev->phy;
+	int err;
+
+	print_hex_dump_debug("PN532_uart TX: ", DUMP_PREFIX_NONE, 16, 1,
+			     out->data, out->len, false);
+
+	pn532->cur_out_buf = out;
+	if (pn532->send_wakeup) {
+		err = serdev_device_write(pn532->serdev,
+				wakeup, sizeof(wakeup),
+				MAX_SCHEDULE_TIMEOUT);
+		if (err < 0)
+			return err;
+	}
+
+	if (pn532->send_wakeup == PN532_SEND_LAST_WAKEUP)
+		pn532->send_wakeup = PN532_SEND_NO_WAKEUP;
+
+	err = serdev_device_write(pn532->serdev, out->data, out->len,
+			MAX_SCHEDULE_TIMEOUT);
+	if (err < 0)
+		return err;
+
+	mod_timer(&pn532->cmd_timeout, HZ / 40 + jiffies);
+	return 0;
+}
+
+static int pn532_uart_send_ack(struct pn533 *dev, gfp_t flags)
+{
+	/* spec 7.1.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
+	static const u8 ack[PN533_STD_FRAME_ACK_SIZE] = {
+			0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
+	struct pn532_uart_phy *pn532 = dev->phy;
+	int err;
+
+	err = serdev_device_write(pn532->serdev, ack, sizeof(ack),
+			MAX_SCHEDULE_TIMEOUT);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static void pn532_uart_abort_cmd(struct pn533 *dev, gfp_t flags)
+{
+	/* An ack will cancel the last issued command */
+	pn532_uart_send_ack(dev, flags);
+	/* schedule cmd_complete_work to finish current command execution */
+	pn533_recv_frame(dev, NULL, -ENOENT);
+}
+
+static int pn532_dev_up(struct pn533 *dev)
+{
+	struct pn532_uart_phy *pn532 = dev->phy;
+	int ret = 0;
+
+	ret = serdev_device_open(pn532->serdev);
+	if (ret)
+		return ret;
+
+	pn532->send_wakeup = PN532_SEND_LAST_WAKEUP;
+	return ret;
+}
+
+static int pn532_dev_down(struct pn533 *dev)
+{
+	struct pn532_uart_phy *pn532 = dev->phy;
+
+	serdev_device_close(pn532->serdev);
+	pn532->send_wakeup = PN532_SEND_WAKEUP;
+
+	return 0;
+}
+
+static const struct pn533_phy_ops uart_phy_ops = {
+	.send_frame = pn532_uart_send_frame,
+	.send_ack = pn532_uart_send_ack,
+	.abort_cmd = pn532_uart_abort_cmd,
+	.dev_up = pn532_dev_up,
+	.dev_down = pn532_dev_down,
+};
+
+static void pn532_cmd_timeout(struct timer_list *t)
+{
+	struct pn532_uart_phy *dev = from_timer(dev, t, cmd_timeout);
+
+	pn532_uart_send_frame(dev->priv, dev->cur_out_buf);
+}
+
+/*
+ * scans the buffer if it contains a pn532 frame. It is not checked if the
+ * frame is really valid. This is later done with pn533_rx_frame_is_valid.
+ * This is useful for malformed or errornous transmitted frames. Adjusts the
+ * bufferposition where the frame starts, since pn533_recv_frame expects a
+ * well formed frame.
+ */
+static int pn532_uart_rx_is_frame(struct sk_buff *skb)
+{
+	struct pn533_std_frame *std;
+	struct pn533_ext_frame *ext;
+	u16 frame_len;
+	int i;
+
+	for (i = 0; i + PN533_STD_FRAME_ACK_SIZE <= skb->len; i++) {
+		std = (struct pn533_std_frame *)&skb->data[i];
+		/* search start code */
+		if (std->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
+			continue;
+
+		/* frame type */
+		switch (std->datalen) {
+		case PN533_FRAME_DATALEN_ACK:
+			if (std->datalen_checksum == 0xff) {
+				skb_pull(skb, i);
+				return 1;
+			}
+
+			break;
+		case PN533_FRAME_DATALEN_ERROR:
+			if ((std->datalen_checksum == 0xff) &&
+					(skb->len >=
+					 PN533_STD_ERROR_FRAME_SIZE)) {
+				skb_pull(skb, i);
+				return 1;
+			}
+
+			break;
+		case PN533_FRAME_DATALEN_EXTENDED:
+			ext = (struct pn533_ext_frame *)&skb->data[i];
+			frame_len = be16_to_cpu(ext->datalen);
+			if (skb->len >= frame_len +
+					sizeof(struct pn533_ext_frame) +
+					2 /* CKS + Postamble */) {
+				skb_pull(skb, i);
+				return 1;
+			}
+
+			break;
+		default: /* normal information frame */
+			frame_len = std->datalen;
+			if (skb->len >= frame_len +
+					sizeof(struct pn533_std_frame) +
+					2 /* CKS + Postamble */) {
+				skb_pull(skb, i);
+				return 1;
+			}
+
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static int pn532_receive_buf(struct serdev_device *serdev,
+		const unsigned char *data, size_t count)
+{
+	struct pn532_uart_phy *dev = serdev_device_get_drvdata(serdev);
+	size_t i;
+
+	del_timer(&dev->cmd_timeout);
+	for (i = 0; i < count; i++) {
+		skb_put_u8(dev->recv_skb, *data++);
+		if (!pn532_uart_rx_is_frame(dev->recv_skb))
+			continue;
+
+		pn533_recv_frame(dev->priv, dev->recv_skb, 0);
+		dev->recv_skb = alloc_skb(PN532_UART_SKB_BUFF_LEN, GFP_KERNEL);
+		if (!dev->recv_skb)
+			return 0;
+	}
+
+	return i;
+}
+
+static const struct serdev_device_ops pn532_serdev_ops = {
+	.receive_buf = pn532_receive_buf,
+	.write_wakeup = serdev_device_write_wakeup,
+};
+
+static const struct of_device_id pn532_uart_of_match[] = {
+	{ .compatible = "nxp,pn532", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, pn532_uart_of_match);
+
+static int pn532_uart_probe(struct serdev_device *serdev)
+{
+	struct pn532_uart_phy *pn532;
+	struct pn533 *priv;
+	int err;
+
+	err = -ENOMEM;
+	pn532 = kzalloc(sizeof(*pn532), GFP_KERNEL);
+	if (!pn532)
+		goto err_exit;
+
+	pn532->recv_skb = alloc_skb(PN532_UART_SKB_BUFF_LEN, GFP_KERNEL);
+	if (!pn532->recv_skb)
+		goto err_free;
+
+	pn532->serdev = serdev;
+	serdev_device_set_drvdata(serdev, pn532);
+	serdev_device_set_client_ops(serdev, &pn532_serdev_ops);
+	err = serdev_device_open(serdev);
+	if (err) {
+		dev_err(&serdev->dev, "Unable to open device\n");
+		goto err_skb;
+	}
+
+	err = serdev_device_set_baudrate(serdev, 115200);
+	if (err != 115200) {
+		err = -EINVAL;
+		goto err_serdev;
+	}
+
+	serdev_device_set_flow_control(serdev, false);
+	pn532->send_wakeup = PN532_SEND_WAKEUP;
+	timer_setup(&pn532->cmd_timeout, pn532_cmd_timeout, 0);
+	priv = pn53x_common_init(PN533_DEVICE_PN532_AUTOPOLL,
+				     PN533_PROTO_REQ_ACK_RESP,
+				     pn532, &uart_phy_ops, NULL,
+				     &pn532->serdev->dev);
+	if (IS_ERR(priv)) {
+		err = PTR_ERR(priv);
+		goto err_serdev;
+	}
+
+	pn532->priv = priv;
+	err = pn533_finalize_setup(pn532->priv);
+	if (err)
+		goto err_clean;
+
+	serdev_device_close(serdev);
+	err = pn53x_register_nfc(priv, PN533_NO_TYPE_B_PROTOCOLS, &serdev->dev);
+	if (err) {
+		pn53x_common_clean(pn532->priv);
+		goto err_skb;
+	}
+
+	return err;
+
+err_clean:
+	pn53x_common_clean(pn532->priv);
+err_serdev:
+	serdev_device_close(serdev);
+err_skb:
+	kfree_skb(pn532->recv_skb);
+err_free:
+	kfree(pn532);
+err_exit:
+	return err;
+}
+
+static void pn532_uart_remove(struct serdev_device *serdev)
+{
+	struct pn532_uart_phy *pn532 = serdev_device_get_drvdata(serdev);
+
+	pn53x_unregister_nfc(pn532->priv);
+	serdev_device_close(serdev);
+	pn53x_common_clean(pn532->priv);
+	del_timer_sync(&pn532->cmd_timeout);
+	kfree_skb(pn532->recv_skb);
+	kfree(pn532);
+}
+
+static struct serdev_device_driver pn532_uart_driver = {
+	.probe = pn532_uart_probe,
+	.remove = pn532_uart_remove,
+	.driver = {
+		.name = "pn532_uart",
+		.of_match_table = pn532_uart_of_match,
+	},
+};
+
+module_serdev_device_driver(pn532_uart_driver);
+
+MODULE_AUTHOR("Lars Pöschel <poeschel@lemonage.de>");
+MODULE_DESCRIPTION("PN532 UART driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/nfc/pn533/usb.c b/drivers/nfc/pn533/usb.c
new file mode 100644
index 000000000..a187f0e0b
--- /dev/null
+++ b/drivers/nfc/pn533/usb.c
@@ -0,0 +1,650 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for NXP PN533 NFC Chip - USB transport layer
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/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 urb *ack_urb;
+	u8 *ack_buffer;
+
+	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_ATOMIC);
+		if (!skb) {
+			nfc_err(&phy->udev->dev, "failed to alloc memory\n");
+		} else {
+			skb_put_data(skb, 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;
+	static const u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
+	/* spec 7.1.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
+
+	if (!phy->ack_buffer) {
+		phy->ack_buffer = kmemdup(ack, sizeof(ack), flags);
+		if (!phy->ack_buffer)
+			return -ENOMEM;
+	}
+
+	phy->ack_urb->transfer_buffer = phy->ack_buffer;
+	phy->ack_urb->transfer_buffer_length = sizeof(ack);
+	return usb_submit_urb(phy->ack_urb, flags);
+}
+
+struct pn533_out_arg {
+	struct pn533_usb_phy *phy;
+	struct completion done;
+};
+
+static int pn533_usb_send_frame(struct pn533 *dev,
+				struct sk_buff *out)
+{
+	struct pn533_usb_phy *phy = dev->phy;
+	struct pn533_out_arg arg;
+	void *cntx;
+	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);
+
+	arg.phy = phy;
+	init_completion(&arg.done);
+	cntx = phy->out_urb->context;
+	phy->out_urb->context = &arg;
+
+	rc = usb_submit_urb(phy->out_urb, GFP_KERNEL);
+	if (rc)
+		return rc;
+
+	wait_for_completion(&arg.done);
+	phy->out_urb->context = cntx;
+
+	if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
+		/* request for response for sent packet directly */
+		rc = pn533_submit_urb_for_response(phy, GFP_KERNEL);
+		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 functions */
+
+/* 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;
+
+	/*
+	 * 3 msg specific bytes or status, error and 1 specific
+	 * byte for reposnse msg
+	 */
+	u8 params[3];
+	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;
+	/* sizeof(apdu_hdr) + sizeof(datalen) */
+	frame->ccid.datalen = sizeof(frame->apdu) + 1;
+	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;
+
+	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};
+	char *buffer;
+	int transferred;
+	int rc;
+	void *cntx;
+	struct pn533_acr122_poweron_rdr_arg arg;
+
+	buffer = kmemdup(cmd, sizeof(cmd), GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	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;
+
+	print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
+		       cmd, sizeof(cmd), false);
+
+	rc = usb_bulk_msg(phy->udev, phy->out_urb->pipe, buffer, sizeof(cmd),
+			  &transferred, 5000);
+	kfree(buffer);
+	if (rc || (transferred != sizeof(cmd))) {
+		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_out_complete(struct urb *urb)
+{
+	struct pn533_out_arg *arg = urb->context;
+	struct pn533_usb_phy *phy = arg->phy;
+
+	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);
+	}
+
+	complete(&arg->done);
+}
+
+static void pn533_ack_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 const 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)
+		return -ENOMEM;
+
+	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);
+	phy->ack_urb = usb_alloc_urb(0, GFP_KERNEL);
+
+	if (!phy->in_urb || !phy->out_urb || !phy->ack_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_out_complete, phy);
+	usb_fill_bulk_urb(phy->ack_urb, phy->udev,
+			  usb_sndbulkpipe(phy->udev, out_endpoint),
+			  NULL, 0, pn533_ack_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 = pn53x_common_init(id->driver_info, protocol_type,
+					phy, &usb_phy_ops, fops,
+					&phy->udev->dev);
+
+	if (IS_ERR(priv)) {
+		rc = PTR_ERR(priv);
+		goto error;
+	}
+
+	phy->priv = priv;
+
+	rc = pn533_finalize_setup(priv);
+	if (rc)
+		goto err_clean;
+
+	usb_set_intfdata(interface, phy);
+	rc = pn53x_register_nfc(priv, protocols, &interface->dev);
+	if (rc)
+		goto err_clean;
+
+	return 0;
+
+err_clean:
+	pn53x_common_clean(priv);
+error:
+	usb_kill_urb(phy->in_urb);
+	usb_kill_urb(phy->out_urb);
+	usb_kill_urb(phy->ack_urb);
+
+	usb_free_urb(phy->in_urb);
+	usb_free_urb(phy->out_urb);
+	usb_free_urb(phy->ack_urb);
+	usb_put_dev(phy->udev);
+	kfree(in_buf);
+	kfree(phy->ack_buffer);
+
+	return rc;
+}
+
+static void pn533_usb_disconnect(struct usb_interface *interface)
+{
+	struct pn533_usb_phy *phy = usb_get_intfdata(interface);
+
+	if (!phy)
+		return;
+
+	pn53x_unregister_nfc(phy->priv);
+	pn53x_common_clean(phy->priv);
+
+	usb_set_intfdata(interface, NULL);
+
+	usb_kill_urb(phy->in_urb);
+	usb_kill_urb(phy->out_urb);
+	usb_kill_urb(phy->ack_urb);
+
+	kfree(phy->in_urb->transfer_buffer);
+	usb_free_urb(phy->in_urb);
+	usb_free_urb(phy->out_urb);
+	usb_free_urb(phy->ack_urb);
+	kfree(phy->ack_buffer);
+
+	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@openbossa.org>");
+MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
+MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
+MODULE_DESCRIPTION("PN533 USB driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");