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827 lines
23 KiB
827 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* The NFC Controller Interface is the communication protocol between an |
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* NFC Controller (NFCC) and a Device Host (DH). |
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* |
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* Copyright (C) 2014 Marvell International Ltd. |
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* Copyright (C) 2011 Texas Instruments, Inc. |
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* |
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* Written by Ilan Elias <[email protected]> |
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* |
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* Acknowledgements: |
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* This file is based on hci_event.c, which was written |
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* by Maxim Krasnyansky. |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
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|
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#include <linux/types.h> |
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#include <linux/interrupt.h> |
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#include <linux/bitops.h> |
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#include <linux/skbuff.h> |
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#include "../nfc.h" |
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#include <net/nfc/nci.h> |
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#include <net/nfc/nci_core.h> |
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#include <linux/nfc.h> |
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/* Handle NCI Notification packets */ |
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static void nci_core_reset_ntf_packet(struct nci_dev *ndev, |
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const struct sk_buff *skb) |
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{ |
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/* Handle NCI 2.x core reset notification */ |
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const struct nci_core_reset_ntf *ntf = (void *)skb->data; |
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ndev->nci_ver = ntf->nci_ver; |
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pr_debug("nci_ver 0x%x, config_status 0x%x\n", |
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ntf->nci_ver, ntf->config_status); |
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ndev->manufact_id = ntf->manufact_id; |
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ndev->manufact_specific_info = |
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__le32_to_cpu(ntf->manufact_specific_info); |
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nci_req_complete(ndev, NCI_STATUS_OK); |
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} |
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static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev, |
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struct sk_buff *skb) |
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{ |
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struct nci_core_conn_credit_ntf *ntf = (void *) skb->data; |
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struct nci_conn_info *conn_info; |
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int i; |
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pr_debug("num_entries %d\n", ntf->num_entries); |
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if (ntf->num_entries > NCI_MAX_NUM_CONN) |
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ntf->num_entries = NCI_MAX_NUM_CONN; |
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|
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/* update the credits */ |
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for (i = 0; i < ntf->num_entries; i++) { |
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ntf->conn_entries[i].conn_id = |
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nci_conn_id(&ntf->conn_entries[i].conn_id); |
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pr_debug("entry[%d]: conn_id %d, credits %d\n", |
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i, ntf->conn_entries[i].conn_id, |
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ntf->conn_entries[i].credits); |
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conn_info = nci_get_conn_info_by_conn_id(ndev, |
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ntf->conn_entries[i].conn_id); |
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if (!conn_info) |
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return; |
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atomic_add(ntf->conn_entries[i].credits, |
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&conn_info->credits_cnt); |
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} |
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/* trigger the next tx */ |
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if (!skb_queue_empty(&ndev->tx_q)) |
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queue_work(ndev->tx_wq, &ndev->tx_work); |
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} |
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static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev, |
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const struct sk_buff *skb) |
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{ |
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__u8 status = skb->data[0]; |
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pr_debug("status 0x%x\n", status); |
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if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { |
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/* Activation failed, so complete the request |
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(the state remains the same) */ |
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nci_req_complete(ndev, status); |
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} |
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} |
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static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev, |
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struct sk_buff *skb) |
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{ |
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struct nci_core_intf_error_ntf *ntf = (void *) skb->data; |
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ntf->conn_id = nci_conn_id(&ntf->conn_id); |
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pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id); |
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/* complete the data exchange transaction, if exists */ |
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if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) |
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nci_data_exchange_complete(ndev, NULL, ntf->conn_id, -EIO); |
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} |
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static const __u8 * |
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nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev, |
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struct rf_tech_specific_params_nfca_poll *nfca_poll, |
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const __u8 *data) |
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{ |
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nfca_poll->sens_res = __le16_to_cpu(*((__le16 *)data)); |
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data += 2; |
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nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE); |
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pr_debug("sens_res 0x%x, nfcid1_len %d\n", |
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nfca_poll->sens_res, nfca_poll->nfcid1_len); |
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memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len); |
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data += nfca_poll->nfcid1_len; |
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nfca_poll->sel_res_len = *data++; |
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if (nfca_poll->sel_res_len != 0) |
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nfca_poll->sel_res = *data++; |
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pr_debug("sel_res_len %d, sel_res 0x%x\n", |
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nfca_poll->sel_res_len, |
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nfca_poll->sel_res); |
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return data; |
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} |
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static const __u8 * |
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nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev, |
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struct rf_tech_specific_params_nfcb_poll *nfcb_poll, |
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const __u8 *data) |
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{ |
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nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE); |
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pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len); |
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memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len); |
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data += nfcb_poll->sensb_res_len; |
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return data; |
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} |
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static const __u8 * |
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nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev, |
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struct rf_tech_specific_params_nfcf_poll *nfcf_poll, |
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const __u8 *data) |
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{ |
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nfcf_poll->bit_rate = *data++; |
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nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE); |
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pr_debug("bit_rate %d, sensf_res_len %d\n", |
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nfcf_poll->bit_rate, nfcf_poll->sensf_res_len); |
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memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len); |
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data += nfcf_poll->sensf_res_len; |
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return data; |
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} |
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static const __u8 * |
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nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev, |
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struct rf_tech_specific_params_nfcv_poll *nfcv_poll, |
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const __u8 *data) |
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{ |
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++data; |
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nfcv_poll->dsfid = *data++; |
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memcpy(nfcv_poll->uid, data, NFC_ISO15693_UID_MAXSIZE); |
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data += NFC_ISO15693_UID_MAXSIZE; |
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return data; |
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} |
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static const __u8 * |
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nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev, |
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struct rf_tech_specific_params_nfcf_listen *nfcf_listen, |
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const __u8 *data) |
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{ |
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nfcf_listen->local_nfcid2_len = min_t(__u8, *data++, |
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NFC_NFCID2_MAXSIZE); |
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memcpy(nfcf_listen->local_nfcid2, data, nfcf_listen->local_nfcid2_len); |
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data += nfcf_listen->local_nfcid2_len; |
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return data; |
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} |
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static __u32 nci_get_prop_rf_protocol(struct nci_dev *ndev, __u8 rf_protocol) |
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{ |
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if (ndev->ops->get_rfprotocol) |
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return ndev->ops->get_rfprotocol(ndev, rf_protocol); |
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return 0; |
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} |
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static int nci_add_new_protocol(struct nci_dev *ndev, |
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struct nfc_target *target, |
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__u8 rf_protocol, |
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__u8 rf_tech_and_mode, |
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const void *params) |
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{ |
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const struct rf_tech_specific_params_nfca_poll *nfca_poll; |
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const struct rf_tech_specific_params_nfcb_poll *nfcb_poll; |
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const struct rf_tech_specific_params_nfcf_poll *nfcf_poll; |
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const struct rf_tech_specific_params_nfcv_poll *nfcv_poll; |
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__u32 protocol; |
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if (rf_protocol == NCI_RF_PROTOCOL_T1T) |
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protocol = NFC_PROTO_JEWEL_MASK; |
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else if (rf_protocol == NCI_RF_PROTOCOL_T2T) |
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protocol = NFC_PROTO_MIFARE_MASK; |
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else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP) |
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if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) |
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protocol = NFC_PROTO_ISO14443_MASK; |
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else |
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protocol = NFC_PROTO_ISO14443_B_MASK; |
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else if (rf_protocol == NCI_RF_PROTOCOL_T3T) |
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protocol = NFC_PROTO_FELICA_MASK; |
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else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) |
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protocol = NFC_PROTO_NFC_DEP_MASK; |
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else if (rf_protocol == NCI_RF_PROTOCOL_T5T) |
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protocol = NFC_PROTO_ISO15693_MASK; |
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else |
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protocol = nci_get_prop_rf_protocol(ndev, rf_protocol); |
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if (!(protocol & ndev->poll_prots)) { |
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pr_err("the target found does not have the desired protocol\n"); |
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return -EPROTO; |
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} |
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if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) { |
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nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params; |
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target->sens_res = nfca_poll->sens_res; |
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target->sel_res = nfca_poll->sel_res; |
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target->nfcid1_len = nfca_poll->nfcid1_len; |
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if (target->nfcid1_len > 0) { |
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memcpy(target->nfcid1, nfca_poll->nfcid1, |
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target->nfcid1_len); |
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} |
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} else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) { |
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nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params; |
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target->sensb_res_len = nfcb_poll->sensb_res_len; |
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if (target->sensb_res_len > 0) { |
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memcpy(target->sensb_res, nfcb_poll->sensb_res, |
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target->sensb_res_len); |
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} |
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} else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) { |
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nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params; |
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target->sensf_res_len = nfcf_poll->sensf_res_len; |
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if (target->sensf_res_len > 0) { |
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memcpy(target->sensf_res, nfcf_poll->sensf_res, |
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target->sensf_res_len); |
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} |
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} else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) { |
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nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params; |
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target->is_iso15693 = 1; |
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target->iso15693_dsfid = nfcv_poll->dsfid; |
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memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE); |
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} else { |
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pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode); |
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return -EPROTO; |
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} |
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target->supported_protocols |= protocol; |
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pr_debug("protocol 0x%x\n", protocol); |
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return 0; |
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} |
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static void nci_add_new_target(struct nci_dev *ndev, |
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const struct nci_rf_discover_ntf *ntf) |
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{ |
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struct nfc_target *target; |
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int i, rc; |
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for (i = 0; i < ndev->n_targets; i++) { |
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target = &ndev->targets[i]; |
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if (target->logical_idx == ntf->rf_discovery_id) { |
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/* This target already exists, add the new protocol */ |
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nci_add_new_protocol(ndev, target, ntf->rf_protocol, |
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ntf->rf_tech_and_mode, |
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&ntf->rf_tech_specific_params); |
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return; |
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} |
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} |
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/* This is a new target, check if we've enough room */ |
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if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) { |
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pr_debug("not enough room, ignoring new target...\n"); |
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return; |
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} |
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target = &ndev->targets[ndev->n_targets]; |
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rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, |
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ntf->rf_tech_and_mode, |
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&ntf->rf_tech_specific_params); |
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if (!rc) { |
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target->logical_idx = ntf->rf_discovery_id; |
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ndev->n_targets++; |
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pr_debug("logical idx %d, n_targets %d\n", target->logical_idx, |
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ndev->n_targets); |
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} |
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} |
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void nci_clear_target_list(struct nci_dev *ndev) |
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{ |
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memset(ndev->targets, 0, |
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(sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS)); |
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ndev->n_targets = 0; |
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} |
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static void nci_rf_discover_ntf_packet(struct nci_dev *ndev, |
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const struct sk_buff *skb) |
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{ |
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struct nci_rf_discover_ntf ntf; |
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const __u8 *data = skb->data; |
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bool add_target = true; |
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ntf.rf_discovery_id = *data++; |
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ntf.rf_protocol = *data++; |
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ntf.rf_tech_and_mode = *data++; |
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ntf.rf_tech_specific_params_len = *data++; |
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pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); |
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pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); |
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pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode); |
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pr_debug("rf_tech_specific_params_len %d\n", |
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ntf.rf_tech_specific_params_len); |
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if (ntf.rf_tech_specific_params_len > 0) { |
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switch (ntf.rf_tech_and_mode) { |
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case NCI_NFC_A_PASSIVE_POLL_MODE: |
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data = nci_extract_rf_params_nfca_passive_poll(ndev, |
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&(ntf.rf_tech_specific_params.nfca_poll), data); |
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break; |
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case NCI_NFC_B_PASSIVE_POLL_MODE: |
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data = nci_extract_rf_params_nfcb_passive_poll(ndev, |
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&(ntf.rf_tech_specific_params.nfcb_poll), data); |
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break; |
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case NCI_NFC_F_PASSIVE_POLL_MODE: |
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data = nci_extract_rf_params_nfcf_passive_poll(ndev, |
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&(ntf.rf_tech_specific_params.nfcf_poll), data); |
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break; |
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|
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case NCI_NFC_V_PASSIVE_POLL_MODE: |
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data = nci_extract_rf_params_nfcv_passive_poll(ndev, |
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&(ntf.rf_tech_specific_params.nfcv_poll), data); |
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break; |
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default: |
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pr_err("unsupported rf_tech_and_mode 0x%x\n", |
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ntf.rf_tech_and_mode); |
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data += ntf.rf_tech_specific_params_len; |
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add_target = false; |
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} |
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} |
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ntf.ntf_type = *data++; |
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pr_debug("ntf_type %d\n", ntf.ntf_type); |
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if (add_target == true) |
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nci_add_new_target(ndev, &ntf); |
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if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) { |
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atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES); |
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} else { |
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atomic_set(&ndev->state, NCI_W4_HOST_SELECT); |
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nfc_targets_found(ndev->nfc_dev, ndev->targets, |
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ndev->n_targets); |
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} |
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} |
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static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev, |
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struct nci_rf_intf_activated_ntf *ntf, |
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const __u8 *data) |
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{ |
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struct activation_params_nfca_poll_iso_dep *nfca_poll; |
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struct activation_params_nfcb_poll_iso_dep *nfcb_poll; |
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|
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switch (ntf->activation_rf_tech_and_mode) { |
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case NCI_NFC_A_PASSIVE_POLL_MODE: |
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nfca_poll = &ntf->activation_params.nfca_poll_iso_dep; |
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nfca_poll->rats_res_len = min_t(__u8, *data++, 20); |
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pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len); |
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if (nfca_poll->rats_res_len > 0) { |
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memcpy(nfca_poll->rats_res, |
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data, nfca_poll->rats_res_len); |
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} |
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break; |
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|
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case NCI_NFC_B_PASSIVE_POLL_MODE: |
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nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep; |
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nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50); |
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pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len); |
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if (nfcb_poll->attrib_res_len > 0) { |
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memcpy(nfcb_poll->attrib_res, |
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data, nfcb_poll->attrib_res_len); |
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} |
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break; |
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|
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default: |
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pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", |
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ntf->activation_rf_tech_and_mode); |
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return NCI_STATUS_RF_PROTOCOL_ERROR; |
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} |
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|
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return NCI_STATUS_OK; |
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} |
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|
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static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev, |
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struct nci_rf_intf_activated_ntf *ntf, |
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const __u8 *data) |
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{ |
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struct activation_params_poll_nfc_dep *poll; |
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struct activation_params_listen_nfc_dep *listen; |
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|
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switch (ntf->activation_rf_tech_and_mode) { |
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case NCI_NFC_A_PASSIVE_POLL_MODE: |
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case NCI_NFC_F_PASSIVE_POLL_MODE: |
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poll = &ntf->activation_params.poll_nfc_dep; |
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poll->atr_res_len = min_t(__u8, *data++, |
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NFC_ATR_RES_MAXSIZE - 2); |
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pr_debug("atr_res_len %d\n", poll->atr_res_len); |
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if (poll->atr_res_len > 0) |
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memcpy(poll->atr_res, data, poll->atr_res_len); |
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break; |
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|
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case NCI_NFC_A_PASSIVE_LISTEN_MODE: |
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case NCI_NFC_F_PASSIVE_LISTEN_MODE: |
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listen = &ntf->activation_params.listen_nfc_dep; |
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listen->atr_req_len = min_t(__u8, *data++, |
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NFC_ATR_REQ_MAXSIZE - 2); |
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pr_debug("atr_req_len %d\n", listen->atr_req_len); |
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if (listen->atr_req_len > 0) |
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memcpy(listen->atr_req, data, listen->atr_req_len); |
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break; |
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|
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default: |
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pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", |
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ntf->activation_rf_tech_and_mode); |
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return NCI_STATUS_RF_PROTOCOL_ERROR; |
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} |
|
|
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return NCI_STATUS_OK; |
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} |
|
|
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static void nci_target_auto_activated(struct nci_dev *ndev, |
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const struct nci_rf_intf_activated_ntf *ntf) |
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{ |
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struct nfc_target *target; |
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int rc; |
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|
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target = &ndev->targets[ndev->n_targets]; |
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|
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rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, |
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ntf->activation_rf_tech_and_mode, |
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&ntf->rf_tech_specific_params); |
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if (rc) |
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return; |
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|
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target->logical_idx = ntf->rf_discovery_id; |
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ndev->n_targets++; |
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|
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pr_debug("logical idx %d, n_targets %d\n", |
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target->logical_idx, ndev->n_targets); |
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|
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nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets); |
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} |
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|
|
static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev, |
|
const struct nci_rf_intf_activated_ntf *ntf) |
|
{ |
|
ndev->remote_gb_len = 0; |
|
|
|
if (ntf->activation_params_len <= 0) |
|
return NCI_STATUS_OK; |
|
|
|
switch (ntf->activation_rf_tech_and_mode) { |
|
case NCI_NFC_A_PASSIVE_POLL_MODE: |
|
case NCI_NFC_F_PASSIVE_POLL_MODE: |
|
ndev->remote_gb_len = min_t(__u8, |
|
(ntf->activation_params.poll_nfc_dep.atr_res_len |
|
- NFC_ATR_RES_GT_OFFSET), |
|
NFC_ATR_RES_GB_MAXSIZE); |
|
memcpy(ndev->remote_gb, |
|
(ntf->activation_params.poll_nfc_dep.atr_res |
|
+ NFC_ATR_RES_GT_OFFSET), |
|
ndev->remote_gb_len); |
|
break; |
|
|
|
case NCI_NFC_A_PASSIVE_LISTEN_MODE: |
|
case NCI_NFC_F_PASSIVE_LISTEN_MODE: |
|
ndev->remote_gb_len = min_t(__u8, |
|
(ntf->activation_params.listen_nfc_dep.atr_req_len |
|
- NFC_ATR_REQ_GT_OFFSET), |
|
NFC_ATR_REQ_GB_MAXSIZE); |
|
memcpy(ndev->remote_gb, |
|
(ntf->activation_params.listen_nfc_dep.atr_req |
|
+ NFC_ATR_REQ_GT_OFFSET), |
|
ndev->remote_gb_len); |
|
break; |
|
|
|
default: |
|
pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", |
|
ntf->activation_rf_tech_and_mode); |
|
return NCI_STATUS_RF_PROTOCOL_ERROR; |
|
} |
|
|
|
return NCI_STATUS_OK; |
|
} |
|
|
|
static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev, |
|
const struct sk_buff *skb) |
|
{ |
|
struct nci_conn_info *conn_info; |
|
struct nci_rf_intf_activated_ntf ntf; |
|
const __u8 *data = skb->data; |
|
int err = NCI_STATUS_OK; |
|
|
|
ntf.rf_discovery_id = *data++; |
|
ntf.rf_interface = *data++; |
|
ntf.rf_protocol = *data++; |
|
ntf.activation_rf_tech_and_mode = *data++; |
|
ntf.max_data_pkt_payload_size = *data++; |
|
ntf.initial_num_credits = *data++; |
|
ntf.rf_tech_specific_params_len = *data++; |
|
|
|
pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); |
|
pr_debug("rf_interface 0x%x\n", ntf.rf_interface); |
|
pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); |
|
pr_debug("activation_rf_tech_and_mode 0x%x\n", |
|
ntf.activation_rf_tech_and_mode); |
|
pr_debug("max_data_pkt_payload_size 0x%x\n", |
|
ntf.max_data_pkt_payload_size); |
|
pr_debug("initial_num_credits 0x%x\n", |
|
ntf.initial_num_credits); |
|
pr_debug("rf_tech_specific_params_len %d\n", |
|
ntf.rf_tech_specific_params_len); |
|
|
|
/* If this contains a value of 0x00 (NFCEE Direct RF |
|
* Interface) then all following parameters SHALL contain a |
|
* value of 0 and SHALL be ignored. |
|
*/ |
|
if (ntf.rf_interface == NCI_RF_INTERFACE_NFCEE_DIRECT) |
|
goto listen; |
|
|
|
if (ntf.rf_tech_specific_params_len > 0) { |
|
switch (ntf.activation_rf_tech_and_mode) { |
|
case NCI_NFC_A_PASSIVE_POLL_MODE: |
|
data = nci_extract_rf_params_nfca_passive_poll(ndev, |
|
&(ntf.rf_tech_specific_params.nfca_poll), data); |
|
break; |
|
|
|
case NCI_NFC_B_PASSIVE_POLL_MODE: |
|
data = nci_extract_rf_params_nfcb_passive_poll(ndev, |
|
&(ntf.rf_tech_specific_params.nfcb_poll), data); |
|
break; |
|
|
|
case NCI_NFC_F_PASSIVE_POLL_MODE: |
|
data = nci_extract_rf_params_nfcf_passive_poll(ndev, |
|
&(ntf.rf_tech_specific_params.nfcf_poll), data); |
|
break; |
|
|
|
case NCI_NFC_V_PASSIVE_POLL_MODE: |
|
data = nci_extract_rf_params_nfcv_passive_poll(ndev, |
|
&(ntf.rf_tech_specific_params.nfcv_poll), data); |
|
break; |
|
|
|
case NCI_NFC_A_PASSIVE_LISTEN_MODE: |
|
/* no RF technology specific parameters */ |
|
break; |
|
|
|
case NCI_NFC_F_PASSIVE_LISTEN_MODE: |
|
data = nci_extract_rf_params_nfcf_passive_listen(ndev, |
|
&(ntf.rf_tech_specific_params.nfcf_listen), |
|
data); |
|
break; |
|
|
|
default: |
|
pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", |
|
ntf.activation_rf_tech_and_mode); |
|
err = NCI_STATUS_RF_PROTOCOL_ERROR; |
|
goto exit; |
|
} |
|
} |
|
|
|
ntf.data_exch_rf_tech_and_mode = *data++; |
|
ntf.data_exch_tx_bit_rate = *data++; |
|
ntf.data_exch_rx_bit_rate = *data++; |
|
ntf.activation_params_len = *data++; |
|
|
|
pr_debug("data_exch_rf_tech_and_mode 0x%x\n", |
|
ntf.data_exch_rf_tech_and_mode); |
|
pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate); |
|
pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate); |
|
pr_debug("activation_params_len %d\n", ntf.activation_params_len); |
|
|
|
if (ntf.activation_params_len > 0) { |
|
switch (ntf.rf_interface) { |
|
case NCI_RF_INTERFACE_ISO_DEP: |
|
err = nci_extract_activation_params_iso_dep(ndev, |
|
&ntf, data); |
|
break; |
|
|
|
case NCI_RF_INTERFACE_NFC_DEP: |
|
err = nci_extract_activation_params_nfc_dep(ndev, |
|
&ntf, data); |
|
break; |
|
|
|
case NCI_RF_INTERFACE_FRAME: |
|
/* no activation params */ |
|
break; |
|
|
|
default: |
|
pr_err("unsupported rf_interface 0x%x\n", |
|
ntf.rf_interface); |
|
err = NCI_STATUS_RF_PROTOCOL_ERROR; |
|
break; |
|
} |
|
} |
|
|
|
exit: |
|
if (err == NCI_STATUS_OK) { |
|
conn_info = ndev->rf_conn_info; |
|
if (!conn_info) |
|
return; |
|
|
|
conn_info->max_pkt_payload_len = ntf.max_data_pkt_payload_size; |
|
conn_info->initial_num_credits = ntf.initial_num_credits; |
|
|
|
/* set the available credits to initial value */ |
|
atomic_set(&conn_info->credits_cnt, |
|
conn_info->initial_num_credits); |
|
|
|
/* store general bytes to be reported later in dep_link_up */ |
|
if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) { |
|
err = nci_store_general_bytes_nfc_dep(ndev, &ntf); |
|
if (err != NCI_STATUS_OK) |
|
pr_err("unable to store general bytes\n"); |
|
} |
|
} |
|
|
|
if (!(ntf.activation_rf_tech_and_mode & NCI_RF_TECH_MODE_LISTEN_MASK)) { |
|
/* Poll mode */ |
|
if (atomic_read(&ndev->state) == NCI_DISCOVERY) { |
|
/* A single target was found and activated |
|
* automatically */ |
|
atomic_set(&ndev->state, NCI_POLL_ACTIVE); |
|
if (err == NCI_STATUS_OK) |
|
nci_target_auto_activated(ndev, &ntf); |
|
} else { /* ndev->state == NCI_W4_HOST_SELECT */ |
|
/* A selected target was activated, so complete the |
|
* request */ |
|
atomic_set(&ndev->state, NCI_POLL_ACTIVE); |
|
nci_req_complete(ndev, err); |
|
} |
|
} else { |
|
listen: |
|
/* Listen mode */ |
|
atomic_set(&ndev->state, NCI_LISTEN_ACTIVE); |
|
if (err == NCI_STATUS_OK && |
|
ntf.rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) { |
|
err = nfc_tm_activated(ndev->nfc_dev, |
|
NFC_PROTO_NFC_DEP_MASK, |
|
NFC_COMM_PASSIVE, |
|
ndev->remote_gb, |
|
ndev->remote_gb_len); |
|
if (err != NCI_STATUS_OK) |
|
pr_err("error when signaling tm activation\n"); |
|
} |
|
} |
|
} |
|
|
|
static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev, |
|
const struct sk_buff *skb) |
|
{ |
|
const struct nci_conn_info *conn_info; |
|
const struct nci_rf_deactivate_ntf *ntf = (void *)skb->data; |
|
|
|
pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason); |
|
|
|
conn_info = ndev->rf_conn_info; |
|
if (!conn_info) |
|
return; |
|
|
|
/* drop tx data queue */ |
|
skb_queue_purge(&ndev->tx_q); |
|
|
|
/* drop partial rx data packet */ |
|
if (ndev->rx_data_reassembly) { |
|
kfree_skb(ndev->rx_data_reassembly); |
|
ndev->rx_data_reassembly = NULL; |
|
} |
|
|
|
/* complete the data exchange transaction, if exists */ |
|
if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) |
|
nci_data_exchange_complete(ndev, NULL, NCI_STATIC_RF_CONN_ID, |
|
-EIO); |
|
|
|
switch (ntf->type) { |
|
case NCI_DEACTIVATE_TYPE_IDLE_MODE: |
|
nci_clear_target_list(ndev); |
|
atomic_set(&ndev->state, NCI_IDLE); |
|
break; |
|
case NCI_DEACTIVATE_TYPE_SLEEP_MODE: |
|
case NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE: |
|
atomic_set(&ndev->state, NCI_W4_HOST_SELECT); |
|
break; |
|
case NCI_DEACTIVATE_TYPE_DISCOVERY: |
|
nci_clear_target_list(ndev); |
|
atomic_set(&ndev->state, NCI_DISCOVERY); |
|
break; |
|
} |
|
|
|
nci_req_complete(ndev, NCI_STATUS_OK); |
|
} |
|
|
|
static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev, |
|
const struct sk_buff *skb) |
|
{ |
|
u8 status = NCI_STATUS_OK; |
|
const struct nci_nfcee_discover_ntf *nfcee_ntf = |
|
(struct nci_nfcee_discover_ntf *)skb->data; |
|
|
|
pr_debug("\n"); |
|
|
|
/* NFCForum NCI 9.2.1 HCI Network Specific Handling |
|
* If the NFCC supports the HCI Network, it SHALL return one, |
|
* and only one, NFCEE_DISCOVER_NTF with a Protocol type of |
|
* “HCI Access”, even if the HCI Network contains multiple NFCEEs. |
|
*/ |
|
ndev->hci_dev->nfcee_id = nfcee_ntf->nfcee_id; |
|
ndev->cur_params.id = nfcee_ntf->nfcee_id; |
|
|
|
nci_req_complete(ndev, status); |
|
} |
|
|
|
static void nci_nfcee_action_ntf_packet(struct nci_dev *ndev, |
|
const struct sk_buff *skb) |
|
{ |
|
pr_debug("\n"); |
|
} |
|
|
|
void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) |
|
{ |
|
__u16 ntf_opcode = nci_opcode(skb->data); |
|
|
|
pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", |
|
nci_pbf(skb->data), |
|
nci_opcode_gid(ntf_opcode), |
|
nci_opcode_oid(ntf_opcode), |
|
nci_plen(skb->data)); |
|
|
|
/* strip the nci control header */ |
|
skb_pull(skb, NCI_CTRL_HDR_SIZE); |
|
|
|
if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) { |
|
if (nci_prop_ntf_packet(ndev, ntf_opcode, skb) == -ENOTSUPP) { |
|
pr_err("unsupported ntf opcode 0x%x\n", |
|
ntf_opcode); |
|
} |
|
|
|
goto end; |
|
} |
|
|
|
switch (ntf_opcode) { |
|
case NCI_OP_CORE_RESET_NTF: |
|
nci_core_reset_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_CORE_CONN_CREDITS_NTF: |
|
nci_core_conn_credits_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_CORE_GENERIC_ERROR_NTF: |
|
nci_core_generic_error_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_CORE_INTF_ERROR_NTF: |
|
nci_core_conn_intf_error_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_RF_DISCOVER_NTF: |
|
nci_rf_discover_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_RF_INTF_ACTIVATED_NTF: |
|
nci_rf_intf_activated_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_RF_DEACTIVATE_NTF: |
|
nci_rf_deactivate_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_NFCEE_DISCOVER_NTF: |
|
nci_nfcee_discover_ntf_packet(ndev, skb); |
|
break; |
|
|
|
case NCI_OP_RF_NFCEE_ACTION_NTF: |
|
nci_nfcee_action_ntf_packet(ndev, skb); |
|
break; |
|
|
|
default: |
|
pr_err("unknown ntf opcode 0x%x\n", ntf_opcode); |
|
break; |
|
} |
|
|
|
nci_core_ntf_packet(ndev, ntf_opcode, skb); |
|
end: |
|
kfree_skb(skb); |
|
}
|
|
|