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bc642817b6
Neither the driver or the core modifies the pn533_phy_ops struct, so make them const to allow the compiler to put the static structs in read-only memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
612 lines
14 KiB
C
612 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for NXP PN533 NFC Chip - USB transport layer
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*
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* Copyright (C) 2011 Instituto Nokia de Tecnologia
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* Copyright (C) 2012-2013 Tieto Poland
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*/
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/nfc.h>
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#include <linux/netdevice.h>
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#include <net/nfc/nfc.h>
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#include "pn533.h"
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#define VERSION "0.1"
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#define PN533_VENDOR_ID 0x4CC
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#define PN533_PRODUCT_ID 0x2533
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#define SCM_VENDOR_ID 0x4E6
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#define SCL3711_PRODUCT_ID 0x5591
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#define SONY_VENDOR_ID 0x054c
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#define PASORI_PRODUCT_ID 0x02e1
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#define ACS_VENDOR_ID 0x072f
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#define ACR122U_PRODUCT_ID 0x2200
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static const struct usb_device_id pn533_usb_table[] = {
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{ USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID),
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.driver_info = PN533_DEVICE_STD },
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{ USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID),
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.driver_info = PN533_DEVICE_STD },
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{ USB_DEVICE(SONY_VENDOR_ID, PASORI_PRODUCT_ID),
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.driver_info = PN533_DEVICE_PASORI },
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{ USB_DEVICE(ACS_VENDOR_ID, ACR122U_PRODUCT_ID),
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.driver_info = PN533_DEVICE_ACR122U },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, pn533_usb_table);
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struct pn533_usb_phy {
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struct usb_device *udev;
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struct usb_interface *interface;
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struct urb *out_urb;
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struct urb *in_urb;
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struct urb *ack_urb;
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u8 *ack_buffer;
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struct pn533 *priv;
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};
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static void pn533_recv_response(struct urb *urb)
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{
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struct pn533_usb_phy *phy = urb->context;
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struct sk_buff *skb = NULL;
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if (!urb->status) {
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skb = alloc_skb(urb->actual_length, GFP_ATOMIC);
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if (!skb) {
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nfc_err(&phy->udev->dev, "failed to alloc memory\n");
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} else {
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skb_put_data(skb, urb->transfer_buffer,
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urb->actual_length);
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}
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}
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pn533_recv_frame(phy->priv, skb, urb->status);
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}
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static int pn533_submit_urb_for_response(struct pn533_usb_phy *phy, gfp_t flags)
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{
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phy->in_urb->complete = pn533_recv_response;
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return usb_submit_urb(phy->in_urb, flags);
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}
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static void pn533_recv_ack(struct urb *urb)
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{
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struct pn533_usb_phy *phy = urb->context;
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struct pn533 *priv = phy->priv;
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struct pn533_cmd *cmd = priv->cmd;
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struct pn533_std_frame *in_frame;
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int rc;
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cmd->status = urb->status;
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switch (urb->status) {
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case 0:
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break; /* success */
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case -ECONNRESET:
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case -ENOENT:
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dev_dbg(&phy->udev->dev,
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"The urb has been stopped (status %d)\n",
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urb->status);
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goto sched_wq;
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case -ESHUTDOWN:
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default:
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nfc_err(&phy->udev->dev,
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"Urb failure (status %d)\n", urb->status);
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goto sched_wq;
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}
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in_frame = phy->in_urb->transfer_buffer;
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if (!pn533_rx_frame_is_ack(in_frame)) {
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nfc_err(&phy->udev->dev, "Received an invalid ack\n");
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cmd->status = -EIO;
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goto sched_wq;
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}
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rc = pn533_submit_urb_for_response(phy, GFP_ATOMIC);
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if (rc) {
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nfc_err(&phy->udev->dev,
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"usb_submit_urb failed with result %d\n", rc);
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cmd->status = rc;
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goto sched_wq;
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}
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return;
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sched_wq:
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queue_work(priv->wq, &priv->cmd_complete_work);
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}
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static int pn533_submit_urb_for_ack(struct pn533_usb_phy *phy, gfp_t flags)
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{
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phy->in_urb->complete = pn533_recv_ack;
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return usb_submit_urb(phy->in_urb, flags);
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}
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static int pn533_usb_send_ack(struct pn533 *dev, gfp_t flags)
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{
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struct pn533_usb_phy *phy = dev->phy;
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static const u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
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/* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
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if (!phy->ack_buffer) {
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phy->ack_buffer = kmemdup(ack, sizeof(ack), flags);
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if (!phy->ack_buffer)
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return -ENOMEM;
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}
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phy->ack_urb->transfer_buffer = phy->ack_buffer;
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phy->ack_urb->transfer_buffer_length = sizeof(ack);
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return usb_submit_urb(phy->ack_urb, flags);
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}
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static int pn533_usb_send_frame(struct pn533 *dev,
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struct sk_buff *out)
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{
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struct pn533_usb_phy *phy = dev->phy;
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int rc;
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if (phy->priv == NULL)
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phy->priv = dev;
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phy->out_urb->transfer_buffer = out->data;
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phy->out_urb->transfer_buffer_length = out->len;
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print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
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out->data, out->len, false);
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rc = usb_submit_urb(phy->out_urb, GFP_KERNEL);
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if (rc)
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return rc;
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if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
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/* request for response for sent packet directly */
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rc = pn533_submit_urb_for_response(phy, GFP_KERNEL);
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if (rc)
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goto error;
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} else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
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/* request for ACK if that's the case */
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rc = pn533_submit_urb_for_ack(phy, GFP_KERNEL);
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if (rc)
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goto error;
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}
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return 0;
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error:
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usb_unlink_urb(phy->out_urb);
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return rc;
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}
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static void pn533_usb_abort_cmd(struct pn533 *dev, gfp_t flags)
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{
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struct pn533_usb_phy *phy = dev->phy;
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/* ACR122U does not support any command which aborts last
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* issued command i.e. as ACK for standard PN533. Additionally,
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* it behaves stange, sending broken or incorrect responses,
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* when we cancel urb before the chip will send response.
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*/
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if (dev->device_type == PN533_DEVICE_ACR122U)
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return;
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/* An ack will cancel the last issued command */
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pn533_usb_send_ack(dev, flags);
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/* cancel the urb request */
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usb_kill_urb(phy->in_urb);
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}
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/* ACR122 specific structs and functions */
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/* ACS ACR122 pn533 frame definitions */
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#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
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+ 2)
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#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
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#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
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+ 2)
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#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
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#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
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/* CCID messages types */
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#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
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#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
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#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
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struct pn533_acr122_ccid_hdr {
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u8 type;
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u32 datalen;
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u8 slot;
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u8 seq;
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/*
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* 3 msg specific bytes or status, error and 1 specific
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* byte for reposnse msg
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*/
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u8 params[3];
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u8 data[]; /* payload */
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} __packed;
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struct pn533_acr122_apdu_hdr {
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u8 class;
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u8 ins;
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u8 p1;
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u8 p2;
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} __packed;
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struct pn533_acr122_tx_frame {
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struct pn533_acr122_ccid_hdr ccid;
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struct pn533_acr122_apdu_hdr apdu;
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u8 datalen;
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u8 data[]; /* pn533 frame: TFI ... */
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} __packed;
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struct pn533_acr122_rx_frame {
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struct pn533_acr122_ccid_hdr ccid;
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u8 data[]; /* pn533 frame : TFI ... */
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} __packed;
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static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
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{
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struct pn533_acr122_tx_frame *frame = _frame;
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frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
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/* sizeof(apdu_hdr) + sizeof(datalen) */
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frame->ccid.datalen = sizeof(frame->apdu) + 1;
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frame->ccid.slot = 0;
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frame->ccid.seq = 0;
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frame->ccid.params[0] = 0;
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frame->ccid.params[1] = 0;
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frame->ccid.params[2] = 0;
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frame->data[0] = PN533_STD_FRAME_DIR_OUT;
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frame->data[1] = cmd_code;
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frame->datalen = 2; /* data[0] + data[1] */
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frame->apdu.class = 0xFF;
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frame->apdu.ins = 0;
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frame->apdu.p1 = 0;
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frame->apdu.p2 = 0;
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}
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static void pn533_acr122_tx_frame_finish(void *_frame)
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{
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struct pn533_acr122_tx_frame *frame = _frame;
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frame->ccid.datalen += frame->datalen;
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}
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static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
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{
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struct pn533_acr122_tx_frame *frame = _frame;
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frame->datalen += len;
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}
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static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
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{
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struct pn533_acr122_rx_frame *frame = _frame;
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if (frame->ccid.type != 0x83)
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return false;
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if (!frame->ccid.datalen)
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return false;
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if (frame->data[frame->ccid.datalen - 2] == 0x63)
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return false;
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return true;
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}
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static int pn533_acr122_rx_frame_size(void *frame)
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{
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struct pn533_acr122_rx_frame *f = frame;
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/* f->ccid.datalen already includes tail length */
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return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
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}
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static u8 pn533_acr122_get_cmd_code(void *frame)
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{
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struct pn533_acr122_rx_frame *f = frame;
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return PN533_FRAME_CMD(f);
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}
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static struct pn533_frame_ops pn533_acr122_frame_ops = {
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.tx_frame_init = pn533_acr122_tx_frame_init,
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.tx_frame_finish = pn533_acr122_tx_frame_finish,
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.tx_update_payload_len = pn533_acr122_tx_update_payload_len,
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.tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
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.tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
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.rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
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.rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
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.rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
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.rx_frame_size = pn533_acr122_rx_frame_size,
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.max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
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.get_cmd_code = pn533_acr122_get_cmd_code,
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};
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struct pn533_acr122_poweron_rdr_arg {
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int rc;
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struct completion done;
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};
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static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
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{
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struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
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print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
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urb->transfer_buffer, urb->transfer_buffer_length,
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false);
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arg->rc = urb->status;
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complete(&arg->done);
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}
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static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy)
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{
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/* Power on th reader (CCID cmd) */
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u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
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0, 0, 0, 0, 0, 0, 3, 0, 0};
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char *buffer;
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int transferred;
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int rc;
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void *cntx;
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struct pn533_acr122_poweron_rdr_arg arg;
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buffer = kmemdup(cmd, sizeof(cmd), GFP_KERNEL);
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if (!buffer)
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return -ENOMEM;
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init_completion(&arg.done);
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cntx = phy->in_urb->context; /* backup context */
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phy->in_urb->complete = pn533_acr122_poweron_rdr_resp;
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phy->in_urb->context = &arg;
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print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
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cmd, sizeof(cmd), false);
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rc = usb_bulk_msg(phy->udev, phy->out_urb->pipe, buffer, sizeof(cmd),
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&transferred, 5000);
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kfree(buffer);
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if (rc || (transferred != sizeof(cmd))) {
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nfc_err(&phy->udev->dev,
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"Reader power on cmd error %d\n", rc);
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return rc;
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}
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rc = usb_submit_urb(phy->in_urb, GFP_KERNEL);
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if (rc) {
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nfc_err(&phy->udev->dev,
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"Can't submit reader poweron cmd response %d\n", rc);
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return rc;
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}
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wait_for_completion(&arg.done);
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phy->in_urb->context = cntx; /* restore context */
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return arg.rc;
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}
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static void pn533_send_complete(struct urb *urb)
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{
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struct pn533_usb_phy *phy = urb->context;
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switch (urb->status) {
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case 0:
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break; /* success */
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case -ECONNRESET:
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case -ENOENT:
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dev_dbg(&phy->udev->dev,
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"The urb has been stopped (status %d)\n",
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urb->status);
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break;
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case -ESHUTDOWN:
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default:
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nfc_err(&phy->udev->dev,
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"Urb failure (status %d)\n",
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urb->status);
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}
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}
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static const struct pn533_phy_ops usb_phy_ops = {
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.send_frame = pn533_usb_send_frame,
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.send_ack = pn533_usb_send_ack,
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.abort_cmd = pn533_usb_abort_cmd,
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};
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static int pn533_usb_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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struct pn533 *priv;
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struct pn533_usb_phy *phy;
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struct usb_host_interface *iface_desc;
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struct usb_endpoint_descriptor *endpoint;
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int in_endpoint = 0;
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int out_endpoint = 0;
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int rc = -ENOMEM;
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int i;
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u32 protocols;
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enum pn533_protocol_type protocol_type = PN533_PROTO_REQ_ACK_RESP;
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struct pn533_frame_ops *fops = NULL;
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unsigned char *in_buf;
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int in_buf_len = PN533_EXT_FRAME_HEADER_LEN +
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PN533_STD_FRAME_MAX_PAYLOAD_LEN +
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PN533_STD_FRAME_TAIL_LEN;
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phy = devm_kzalloc(&interface->dev, sizeof(*phy), GFP_KERNEL);
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if (!phy)
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return -ENOMEM;
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in_buf = kzalloc(in_buf_len, GFP_KERNEL);
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if (!in_buf)
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return -ENOMEM;
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phy->udev = usb_get_dev(interface_to_usbdev(interface));
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phy->interface = interface;
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iface_desc = interface->cur_altsetting;
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for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
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endpoint = &iface_desc->endpoint[i].desc;
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if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
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in_endpoint = endpoint->bEndpointAddress;
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if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
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out_endpoint = endpoint->bEndpointAddress;
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}
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if (!in_endpoint || !out_endpoint) {
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nfc_err(&interface->dev,
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"Could not find bulk-in or bulk-out endpoint\n");
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rc = -ENODEV;
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goto error;
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}
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phy->in_urb = usb_alloc_urb(0, GFP_KERNEL);
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phy->out_urb = usb_alloc_urb(0, GFP_KERNEL);
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phy->ack_urb = usb_alloc_urb(0, GFP_KERNEL);
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|
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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_send_complete, phy);
|
|
usb_fill_bulk_urb(phy->ack_urb, phy->udev,
|
|
usb_sndbulkpipe(phy->udev, out_endpoint),
|
|
NULL, 0, pn533_send_complete, phy);
|
|
|
|
switch (id->driver_info) {
|
|
case PN533_DEVICE_STD:
|
|
protocols = PN533_ALL_PROTOCOLS;
|
|
break;
|
|
|
|
case PN533_DEVICE_PASORI:
|
|
protocols = PN533_NO_TYPE_B_PROTOCOLS;
|
|
break;
|
|
|
|
case PN533_DEVICE_ACR122U:
|
|
protocols = PN533_NO_TYPE_B_PROTOCOLS;
|
|
fops = &pn533_acr122_frame_ops;
|
|
protocol_type = PN533_PROTO_REQ_RESP;
|
|
|
|
rc = pn533_acr122_poweron_rdr(phy);
|
|
if (rc < 0) {
|
|
nfc_err(&interface->dev,
|
|
"Couldn't poweron the reader (error %d)\n", rc);
|
|
goto error;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
nfc_err(&interface->dev, "Unknown device type %lu\n",
|
|
id->driver_info);
|
|
rc = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
priv = 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");
|