227 lines
6.1 KiB
C
227 lines
6.1 KiB
C
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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) 2011 Texas Instruments, Inc.
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*
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* Written by Ilan Elias <ilane@ti.com>
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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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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/* Handle NCI Response packets */
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static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
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{
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struct nci_core_reset_rsp *rsp = (void *) skb->data;
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nfc_dbg("entry, status 0x%x", rsp->status);
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if (rsp->status == NCI_STATUS_OK)
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ndev->nci_ver = rsp->nci_ver;
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nfc_dbg("nci_ver 0x%x", ndev->nci_ver);
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nci_req_complete(ndev, rsp->status);
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}
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static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
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{
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struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data;
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struct nci_core_init_rsp_2 *rsp_2;
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nfc_dbg("entry, status 0x%x", rsp_1->status);
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if (rsp_1->status != NCI_STATUS_OK)
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return;
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ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features);
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ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces;
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if (ndev->num_supported_rf_interfaces >
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NCI_MAX_SUPPORTED_RF_INTERFACES) {
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ndev->num_supported_rf_interfaces =
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NCI_MAX_SUPPORTED_RF_INTERFACES;
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}
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memcpy(ndev->supported_rf_interfaces,
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rsp_1->supported_rf_interfaces,
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ndev->num_supported_rf_interfaces);
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rsp_2 = (void *) (skb->data + 6 + ndev->num_supported_rf_interfaces);
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ndev->max_logical_connections =
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rsp_2->max_logical_connections;
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ndev->max_routing_table_size =
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__le16_to_cpu(rsp_2->max_routing_table_size);
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ndev->max_control_packet_payload_length =
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rsp_2->max_control_packet_payload_length;
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ndev->rf_sending_buffer_size =
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__le16_to_cpu(rsp_2->rf_sending_buffer_size);
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ndev->rf_receiving_buffer_size =
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__le16_to_cpu(rsp_2->rf_receiving_buffer_size);
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ndev->manufacturer_id =
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__le16_to_cpu(rsp_2->manufacturer_id);
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nfc_dbg("nfcc_features 0x%x",
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ndev->nfcc_features);
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nfc_dbg("num_supported_rf_interfaces %d",
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ndev->num_supported_rf_interfaces);
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nfc_dbg("supported_rf_interfaces[0] 0x%x",
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ndev->supported_rf_interfaces[0]);
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nfc_dbg("supported_rf_interfaces[1] 0x%x",
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ndev->supported_rf_interfaces[1]);
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nfc_dbg("supported_rf_interfaces[2] 0x%x",
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ndev->supported_rf_interfaces[2]);
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nfc_dbg("supported_rf_interfaces[3] 0x%x",
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ndev->supported_rf_interfaces[3]);
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nfc_dbg("max_logical_connections %d",
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ndev->max_logical_connections);
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nfc_dbg("max_routing_table_size %d",
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ndev->max_routing_table_size);
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nfc_dbg("max_control_packet_payload_length %d",
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ndev->max_control_packet_payload_length);
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nfc_dbg("rf_sending_buffer_size %d",
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ndev->rf_sending_buffer_size);
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nfc_dbg("rf_receiving_buffer_size %d",
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ndev->rf_receiving_buffer_size);
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nfc_dbg("manufacturer_id 0x%x",
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ndev->manufacturer_id);
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nci_req_complete(ndev, rsp_1->status);
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}
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static void nci_core_conn_create_rsp_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_create_rsp *rsp = (void *) skb->data;
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nfc_dbg("entry, status 0x%x", rsp->status);
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if (rsp->status != NCI_STATUS_OK)
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return;
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ndev->max_pkt_payload_size = rsp->max_pkt_payload_size;
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ndev->initial_num_credits = rsp->initial_num_credits;
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ndev->conn_id = rsp->conn_id;
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atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
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nfc_dbg("max_pkt_payload_size %d", ndev->max_pkt_payload_size);
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nfc_dbg("initial_num_credits %d", ndev->initial_num_credits);
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nfc_dbg("conn_id %d", ndev->conn_id);
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}
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static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
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struct sk_buff *skb)
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{
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__u8 status = skb->data[0];
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nfc_dbg("entry, status 0x%x", status);
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nci_req_complete(ndev, status);
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}
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static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
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{
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__u8 status = skb->data[0];
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nfc_dbg("entry, status 0x%x", status);
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if (status == NCI_STATUS_OK)
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set_bit(NCI_DISCOVERY, &ndev->flags);
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nci_req_complete(ndev, status);
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}
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static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
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struct sk_buff *skb)
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{
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__u8 status = skb->data[0];
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nfc_dbg("entry, status 0x%x", status);
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clear_bit(NCI_DISCOVERY, &ndev->flags);
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nci_req_complete(ndev, status);
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}
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void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
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{
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__u16 rsp_opcode = nci_opcode(skb->data);
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/* we got a rsp, stop the cmd timer */
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del_timer(&ndev->cmd_timer);
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nfc_dbg("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d",
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nci_pbf(skb->data),
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nci_opcode_gid(rsp_opcode),
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nci_opcode_oid(rsp_opcode),
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nci_plen(skb->data));
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/* strip the nci control header */
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skb_pull(skb, NCI_CTRL_HDR_SIZE);
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switch (rsp_opcode) {
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case NCI_OP_CORE_RESET_RSP:
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nci_core_reset_rsp_packet(ndev, skb);
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break;
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case NCI_OP_CORE_INIT_RSP:
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nci_core_init_rsp_packet(ndev, skb);
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break;
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case NCI_OP_CORE_CONN_CREATE_RSP:
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nci_core_conn_create_rsp_packet(ndev, skb);
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break;
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case NCI_OP_RF_DISCOVER_MAP_RSP:
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nci_rf_disc_map_rsp_packet(ndev, skb);
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break;
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case NCI_OP_RF_DISCOVER_RSP:
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nci_rf_disc_rsp_packet(ndev, skb);
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break;
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case NCI_OP_RF_DEACTIVATE_RSP:
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nci_rf_deactivate_rsp_packet(ndev, skb);
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break;
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default:
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nfc_err("unknown rsp opcode 0x%x", rsp_opcode);
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break;
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}
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kfree_skb(skb);
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/* trigger the next cmd */
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atomic_set(&ndev->cmd_cnt, 1);
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if (!skb_queue_empty(&ndev->cmd_q))
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queue_work(ndev->cmd_wq, &ndev->cmd_work);
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}
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