// 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 #include #include #include #include #include #include #include #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); } static int pn533_usb_send_frame(struct pn533 *dev, struct sk_buff *out) { struct pn533_usb_phy *phy = dev->phy; int rc; if (phy->priv == NULL) phy->priv = dev; phy->out_urb->transfer_buffer = out->data; phy->out_urb->transfer_buffer_length = out->len; print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1, out->data, out->len, false); rc = usb_submit_urb(phy->out_urb, GFP_KERNEL); if (rc) return rc; if (dev->protocol_type == PN533_PROTO_REQ_RESP) { /* request for response for sent packet directly */ rc = pn533_submit_urb_for_response(phy, GFP_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 fucntions */ /* ACS ACR122 pn533 frame definitions */ #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \ + 2) #define PN533_ACR122_TX_FRAME_TAIL_LEN 0 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \ + 2) #define PN533_ACR122_RX_FRAME_TAIL_LEN 2 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN /* CCID messages types */ #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83 struct pn533_acr122_ccid_hdr { u8 type; u32 datalen; u8 slot; u8 seq; /* * 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; dev_dbg(&urb->dev->dev, "%s\n", __func__); print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1, urb->transfer_buffer, urb->transfer_buffer_length, false); arg->rc = urb->status; complete(&arg->done); } static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy) { /* Power on th reader (CCID cmd) */ u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON, 0, 0, 0, 0, 0, 0, 3, 0, 0}; char *buffer; int transferred; int rc; void *cntx; struct pn533_acr122_poweron_rdr_arg arg; dev_dbg(&phy->udev->dev, "%s\n", __func__); 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, 0); 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_send_complete(struct urb *urb) { struct pn533_usb_phy *phy = urb->context; switch (urb->status) { case 0: break; /* success */ case -ECONNRESET: case -ENOENT: dev_dbg(&phy->udev->dev, "The urb has been stopped (status %d)\n", urb->status); break; case -ESHUTDOWN: default: nfc_err(&phy->udev->dev, "Urb failure (status %d)\n", urb->status); } } static struct pn533_phy_ops usb_phy_ops = { .send_frame = pn533_usb_send_frame, .send_ack = pn533_usb_send_ack, .abort_cmd = pn533_usb_abort_cmd, }; static int pn533_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct pn533 *priv; struct pn533_usb_phy *phy; struct usb_host_interface *iface_desc; struct usb_endpoint_descriptor *endpoint; int in_endpoint = 0; int out_endpoint = 0; int rc = -ENOMEM; int i; u32 protocols; enum pn533_protocol_type protocol_type = PN533_PROTO_REQ_ACK_RESP; struct pn533_frame_ops *fops = NULL; unsigned char *in_buf; int in_buf_len = PN533_EXT_FRAME_HEADER_LEN + PN533_STD_FRAME_MAX_PAYLOAD_LEN + PN533_STD_FRAME_TAIL_LEN; phy = devm_kzalloc(&interface->dev, sizeof(*phy), GFP_KERNEL); if (!phy) return -ENOMEM; in_buf = kzalloc(in_buf_len, GFP_KERNEL); if (!in_buf) 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_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 = pn533_register_device(id->driver_info, protocols, protocol_type, phy, &usb_phy_ops, fops, &phy->udev->dev, &interface->dev); if (IS_ERR(priv)) { rc = PTR_ERR(priv); goto error; } phy->priv = priv; rc = pn533_finalize_setup(priv); if (rc) goto error; usb_set_intfdata(interface, phy); return 0; error: 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); return rc; } static void pn533_usb_disconnect(struct usb_interface *interface) { struct pn533_usb_phy *phy = usb_get_intfdata(interface); if (!phy) return; pn533_unregister_device(phy->priv); usb_set_intfdata(interface, NULL); usb_kill_urb(phy->in_urb); usb_kill_urb(phy->out_urb); 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 "); MODULE_AUTHOR("Aloisio Almeida Jr "); MODULE_AUTHOR("Waldemar Rymarkiewicz "); MODULE_DESCRIPTION("PN533 USB driver ver " VERSION); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL");