| /****************************************************************************** |
| * |
| * Copyright (C) 2010-2014 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * This file contains functions that NCI vendor specific interface with the |
| * NFCC. On the receive side, it routes events to the appropriate handler |
| * (callback). On the transmit side, it manages the command transmission. |
| * |
| ******************************************************************************/ |
| #include <string.h> |
| |
| #include <android-base/stringprintf.h> |
| #include <base/logging.h> |
| |
| #include "nfc_target.h" |
| |
| #include "gki.h" |
| #include "nfc_int.h" |
| |
| using android::base::StringPrintf; |
| |
| /**************************************************************************** |
| ** Declarations |
| ****************************************************************************/ |
| |
| /******************************************************************************* |
| ** |
| ** Function NFC_RegVSCback |
| ** |
| ** Description This function is called to register or de-register a |
| ** callback function to receive Proprietary NCI response and |
| ** notification events. The maximum number of callback |
| ** functions allowed is NFC_NUM_VS_CBACKS |
| ** |
| ** Returns tNFC_STATUS |
| ** |
| *******************************************************************************/ |
| tNFC_STATUS NFC_RegVSCback(bool is_register, tNFC_VS_CBACK* p_cback) { |
| tNFC_STATUS status = NFC_STATUS_FAILED; |
| int i; |
| |
| if (is_register) { |
| for (i = 0; i < NFC_NUM_VS_CBACKS; i++) { |
| /* find an empty spot to hold the callback function */ |
| if (nfc_cb.p_vs_cb[i] == NULL) { |
| nfc_cb.p_vs_cb[i] = p_cback; |
| status = NFC_STATUS_OK; |
| break; |
| } |
| } |
| } else { |
| for (i = 0; i < NFC_NUM_VS_CBACKS; i++) { |
| /* find the callback to de-register */ |
| if (nfc_cb.p_vs_cb[i] == p_cback) { |
| nfc_cb.p_vs_cb[i] = NULL; |
| status = NFC_STATUS_OK; |
| break; |
| } |
| } |
| } |
| return status; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function NFC_SendRawVsCommand |
| ** |
| ** Description This function is called to send the raw vendor specific |
| ** command to NFCC. The response from NFCC is reported to the |
| ** given tNFC_VS_CBACK. |
| ** |
| ** Parameters p_data - The command buffer |
| ** |
| ** Returns tNFC_STATUS |
| ** |
| *******************************************************************************/ |
| tNFC_STATUS NFC_SendRawVsCommand(NFC_HDR* p_data, tNFC_VS_CBACK* p_cback) { |
| /* Validate parameters */ |
| if (p_data == NULL || (p_data->len > NCI_MAX_VSC_SIZE)) { |
| LOG(ERROR) << StringPrintf("buffer offset must be >= %d", |
| NCI_VSC_MSG_HDR_SIZE); |
| if (p_data) GKI_freebuf(p_data); |
| return NFC_STATUS_INVALID_PARAM; |
| } |
| |
| p_data->event = BT_EVT_TO_NFC_NCI; |
| p_data->layer_specific = NFC_WAIT_RSP_RAW_VS; |
| /* save the callback function in the BT_HDR, to receive the response */ |
| ((tNFC_NCI_VS_MSG*)p_data)->p_cback = p_cback; |
| |
| nfc_ncif_check_cmd_queue(p_data); |
| return NFC_STATUS_OK; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function NFC_SendVsCommand |
| ** |
| ** Description This function is called to send the given vendor specific |
| ** command to NFCC. The response from NFCC is reported to the |
| ** given tNFC_VS_CBACK as (oid). |
| ** |
| ** Parameters oid - The opcode of the VS command. |
| ** p_data - The parameters for the VS command |
| ** |
| ** Returns tNFC_STATUS |
| ** |
| *******************************************************************************/ |
| tNFC_STATUS NFC_SendVsCommand(uint8_t oid, NFC_HDR* p_data, |
| tNFC_VS_CBACK* p_cback) { |
| tNFC_STATUS status = NFC_STATUS_OK; |
| uint8_t* pp; |
| |
| /* Allow VSC with 0-length payload */ |
| if (p_data == NULL) { |
| p_data = NCI_GET_CMD_BUF(0); |
| if (p_data) { |
| p_data->offset = NCI_VSC_MSG_HDR_SIZE; |
| p_data->len = 0; |
| } |
| } |
| |
| /* Validate parameters */ |
| if ((p_data == NULL) || (p_data->offset < NCI_VSC_MSG_HDR_SIZE) || |
| (p_data->len > NCI_MAX_VSC_SIZE)) { |
| LOG(ERROR) << StringPrintf("buffer offset must be >= %d", |
| NCI_VSC_MSG_HDR_SIZE); |
| if (p_data) GKI_freebuf(p_data); |
| return NFC_STATUS_INVALID_PARAM; |
| } |
| |
| p_data->event = BT_EVT_TO_NFC_NCI; |
| p_data->layer_specific = NFC_WAIT_RSP_VSC; |
| /* save the callback function in the NFC_HDR, to receive the response */ |
| ((tNFC_NCI_VS_MSG*)p_data)->p_cback = p_cback; |
| |
| p_data->offset -= NCI_MSG_HDR_SIZE; |
| pp = (uint8_t*)(p_data + 1) + p_data->offset; |
| NCI_MSG_BLD_HDR0(pp, NCI_MT_CMD, NCI_GID_PROP); |
| NCI_MSG_BLD_HDR1(pp, oid); |
| *pp = (uint8_t)p_data->len; |
| p_data->len += NCI_MSG_HDR_SIZE; |
| nfc_ncif_check_cmd_queue(p_data); |
| return status; |
| } |