Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 649 insertions, 0 deletions

diff --git a/drivers/nfc/pn533/usb.c b/drivers/nfc/pn533/usb.c
new file mode 100644
index 000000000..ed9c5e2cf
--- /dev/null
+++ b/drivers/nfc/pn533/usb.c
@@ -0,0 +1,649 @@
+// 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);
+
+	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");