1 /****************************************************************************** 2 * 3 * Copyright (C) 2010-2014 Broadcom Corporation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 /****************************************************************************** 20 * 21 * Protocol timer services (taken from bta ptim) 22 * 23 ******************************************************************************/ 24 #include <android-base/stringprintf.h> 25 #include <base/logging.h> 26 27 #include "nfa_sys_ptim.h" 28 #include "nfa_sys.h" 29 30 using android::base::StringPrintf; 31 32 extern bool nfc_debug_enabled; 33 34 /******************************************************************************* 35 ** 36 ** Function nfa_sys_ptim_init 37 ** 38 ** Description Initialize a protocol timer control block. Parameter 39 ** period is the GKI timer period in milliseconds. Parameter 40 ** timer_id is the GKI timer id. 41 ** 42 ** Returns void 43 ** 44 *******************************************************************************/ 45 void nfa_sys_ptim_init(tPTIM_CB* p_cb, uint16_t period, uint8_t timer_id) { 46 GKI_init_timer_list(&p_cb->timer_queue); 47 p_cb->period = period; 48 p_cb->timer_id = timer_id; 49 } 50 51 /******************************************************************************* 52 ** 53 ** Function nfa_sys_ptim_timer_update 54 ** 55 ** Description Update the protocol timer list and handle expired timers. 56 ** This function is called from the task running the protocol 57 ** timers when the periodic GKI timer expires. 58 ** 59 ** Returns void 60 ** 61 *******************************************************************************/ 62 void nfa_sys_ptim_timer_update(tPTIM_CB* p_cb) { 63 TIMER_LIST_ENT* p_tle; 64 NFC_HDR* p_msg; 65 uint32_t new_ticks_count; 66 int32_t period_in_ticks; 67 68 /* To handle the case when the function is called less frequently than the 69 period 70 we must convert determine the number of ticks since the last update, then 71 convert back to milliseconds before updating timer list */ 72 new_ticks_count = GKI_get_tick_count(); 73 74 /* Check for wrapped condition */ 75 if (new_ticks_count >= p_cb->last_gki_ticks) { 76 period_in_ticks = (int32_t)(new_ticks_count - p_cb->last_gki_ticks); 77 } else { 78 period_in_ticks = (int32_t)(((uint32_t)0xffffffff - p_cb->last_gki_ticks) + 79 new_ticks_count + 1); 80 } 81 82 /* update timer list */ 83 GKI_update_timer_list(&p_cb->timer_queue, GKI_TICKS_TO_MS(period_in_ticks)); 84 85 p_cb->last_gki_ticks = new_ticks_count; 86 87 /* while there are expired timers */ 88 while ((p_cb->timer_queue.p_first) && 89 (p_cb->timer_queue.p_first->ticks <= 0)) { 90 /* removed expired timer from list */ 91 p_tle = p_cb->timer_queue.p_first; 92 DLOG_IF(INFO, nfc_debug_enabled) 93 << StringPrintf("nfa_sys_ptim_timer_update expired: %p", p_tle); 94 GKI_remove_from_timer_list(&p_cb->timer_queue, p_tle); 95 96 /* call timer callback */ 97 if (p_tle->p_cback) { 98 (*p_tle->p_cback)(p_tle); 99 } else if (p_tle->event) { 100 p_msg = (NFC_HDR*)GKI_getbuf(sizeof(NFC_HDR)); 101 if (p_msg != NULL) { 102 p_msg->event = p_tle->event; 103 p_msg->layer_specific = 0; 104 nfa_sys_sendmsg(p_msg); 105 } 106 } 107 } 108 109 /* if timer list is empty stop periodic GKI timer */ 110 if (p_cb->timer_queue.p_first == NULL) { 111 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("ptim timer stop"); 112 GKI_stop_timer(p_cb->timer_id); 113 } 114 } 115 116 /******************************************************************************* 117 ** 118 ** Function nfa_sys_ptim_start_timer 119 ** 120 ** Description Start a protocol timer for the specified amount 121 ** of time in seconds. 122 ** 123 ** Returns void 124 ** 125 *******************************************************************************/ 126 void nfa_sys_ptim_start_timer(tPTIM_CB* p_cb, TIMER_LIST_ENT* p_tle, 127 uint16_t type, int32_t timeout) { 128 DLOG_IF(INFO, nfc_debug_enabled) 129 << StringPrintf("nfa_sys_ptim_start_timer %p", p_tle); 130 131 /* if timer list is currently empty, start periodic GKI timer */ 132 if (p_cb->timer_queue.p_first == NULL) { 133 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("ptim timer start"); 134 p_cb->last_gki_ticks = GKI_get_tick_count(); 135 GKI_start_timer(p_cb->timer_id, GKI_MS_TO_TICKS(p_cb->period), true); 136 } 137 138 GKI_remove_from_timer_list(&p_cb->timer_queue, p_tle); 139 140 p_tle->event = type; 141 p_tle->ticks = timeout; 142 143 GKI_add_to_timer_list(&p_cb->timer_queue, p_tle); 144 } 145 146 /******************************************************************************* 147 ** 148 ** Function nfa_sys_ptim_stop_timer 149 ** 150 ** Description Stop a protocol timer. 151 ** 152 ** Returns void 153 ** 154 *******************************************************************************/ 155 void nfa_sys_ptim_stop_timer(tPTIM_CB* p_cb, TIMER_LIST_ENT* p_tle) { 156 DLOG_IF(INFO, nfc_debug_enabled) 157 << StringPrintf("nfa_sys_ptim_stop_timer %p", p_tle); 158 159 GKI_remove_from_timer_list(&p_cb->timer_queue, p_tle); 160 161 /* if timer list is empty stop periodic GKI timer */ 162 if (p_cb->timer_queue.p_first == NULL) { 163 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("ptim timer stop"); 164 GKI_stop_timer(p_cb->timer_id); 165 } 166 } 167
