1 /****************************************************************************** 2 * 3 * Copyright (C) 2010-2013 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 * 22 * Protocol timer services (taken from bta ptim) 23 * 24 ******************************************************************************/ 25 26 #include "nfc_target.h" 27 #include "gki.h" 28 #include "nfa_sys_ptim.h" 29 #include "nfa_sys.h" 30 #include "nfa_sys_int.h" 31 32 /******************************************************************************* 33 ** 34 ** Function nfa_sys_ptim_init 35 ** 36 ** Description Initialize a protocol timer control block. Parameter 37 ** period is the GKI timer period in milliseconds. Parameter 38 ** timer_id is the GKI timer id. 39 ** 40 ** Returns void 41 ** 42 *******************************************************************************/ 43 void nfa_sys_ptim_init (tPTIM_CB *p_cb, UINT16 period, UINT8 timer_id) 44 { 45 GKI_init_timer_list (&p_cb->timer_queue); 46 p_cb->period = period; 47 p_cb->timer_id = timer_id; 48 } 49 50 /******************************************************************************* 51 ** 52 ** Function nfa_sys_ptim_timer_update 53 ** 54 ** Description Update the protocol timer list and handle expired timers. 55 ** This function is called from the task running the protocol 56 ** timers when the periodic GKI timer expires. 57 ** 58 ** Returns void 59 ** 60 *******************************************************************************/ 61 void nfa_sys_ptim_timer_update (tPTIM_CB *p_cb) 62 { 63 TIMER_LIST_ENT *p_tle; 64 BT_HDR *p_msg; 65 UINT32 new_ticks_count; 66 INT32 period_in_ticks; 67 68 /* To handle the case when the function is called less frequently than the period 69 we must convert determine the number of ticks since the last update, then 70 convert back to milliseconds before updating timer list */ 71 new_ticks_count = GKI_get_tick_count (); 72 73 /* Check for wrapped condition */ 74 if (new_ticks_count >= p_cb->last_gki_ticks) 75 { 76 period_in_ticks = (INT32) (new_ticks_count - p_cb->last_gki_ticks); 77 } 78 else 79 { 80 period_in_ticks = (INT32) (((UINT32) 0xffffffff - p_cb->last_gki_ticks) 81 + new_ticks_count + 1); 82 } 83 84 /* update timer list */ 85 GKI_update_timer_list (&p_cb->timer_queue, GKI_TICKS_TO_MS (period_in_ticks)); 86 87 p_cb->last_gki_ticks = new_ticks_count; 88 89 /* while there are expired timers */ 90 while ((p_cb->timer_queue.p_first) && (p_cb->timer_queue.p_first->ticks <= 0)) 91 { 92 /* removed expired timer from list */ 93 p_tle = p_cb->timer_queue.p_first; 94 NFA_TRACE_DEBUG1 ("nfa_sys_ptim_timer_update expired: %08x", p_tle); 95 GKI_remove_from_timer_list (&p_cb->timer_queue, p_tle); 96 97 /* call timer callback */ 98 if (p_tle->p_cback) 99 { 100 (*p_tle->p_cback) (p_tle); 101 } 102 else if (p_tle->event) 103 { 104 if ((p_msg = (BT_HDR *) GKI_getbuf (sizeof (BT_HDR))) != NULL) 105 { 106 p_msg->event = p_tle->event; 107 p_msg->layer_specific = 0; 108 nfa_sys_sendmsg (p_msg); 109 } 110 } 111 } 112 113 /* if timer list is empty stop periodic GKI timer */ 114 if (p_cb->timer_queue.p_first == NULL) 115 { 116 NFA_TRACE_DEBUG0 ("ptim timer stop"); 117 GKI_stop_timer (p_cb->timer_id); 118 } 119 } 120 121 /******************************************************************************* 122 ** 123 ** Function nfa_sys_ptim_start_timer 124 ** 125 ** Description Start a protocol timer for the specified amount 126 ** of time in seconds. 127 ** 128 ** Returns void 129 ** 130 *******************************************************************************/ 131 void nfa_sys_ptim_start_timer (tPTIM_CB *p_cb, TIMER_LIST_ENT *p_tle, UINT16 type, INT32 timeout) 132 { 133 NFA_TRACE_DEBUG1 ("nfa_sys_ptim_start_timer %08x", p_tle); 134 135 /* if timer list is currently empty, start periodic GKI timer */ 136 if (p_cb->timer_queue.p_first == NULL) 137 { 138 NFA_TRACE_DEBUG0 ("ptim timer start"); 139 p_cb->last_gki_ticks = GKI_get_tick_count (); 140 GKI_start_timer (p_cb->timer_id, GKI_MS_TO_TICKS (p_cb->period), TRUE); 141 } 142 143 GKI_remove_from_timer_list (&p_cb->timer_queue, p_tle); 144 145 p_tle->event = type; 146 p_tle->ticks = timeout; 147 148 GKI_add_to_timer_list (&p_cb->timer_queue, p_tle); 149 } 150 151 /******************************************************************************* 152 ** 153 ** Function nfa_sys_ptim_stop_timer 154 ** 155 ** Description Stop a protocol timer. 156 ** 157 ** Returns void 158 ** 159 *******************************************************************************/ 160 void nfa_sys_ptim_stop_timer (tPTIM_CB *p_cb, TIMER_LIST_ENT *p_tle) 161 { 162 NFA_TRACE_DEBUG1 ("nfa_sys_ptim_stop_timer %08x", p_tle); 163 164 GKI_remove_from_timer_list (&p_cb->timer_queue, p_tle); 165 166 /* if timer list is empty stop periodic GKI timer */ 167 if (p_cb->timer_queue.p_first == NULL) 168 { 169 NFA_TRACE_DEBUG0 ("ptim timer stop"); 170 GKI_stop_timer (p_cb->timer_id); 171 } 172 } 173
