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 "nfa_sys_ptim.h"
25
26 #include <android-base/stringprintf.h>
27 #include <base/logging.h>
28
29 #include "nfa_sys.h"
30
31 using android::base::StringPrintf;
32
33 extern bool nfc_debug_enabled;
34
35 /*******************************************************************************
36 **
37 ** Function nfa_sys_ptim_init
38 **
39 ** Description Initialize a protocol timer control block. Parameter
40 ** period is the GKI timer period in milliseconds. Parameter
41 ** timer_id is the GKI timer id.
42 **
43 ** Returns void
44 **
45 *******************************************************************************/
nfa_sys_ptim_init(tPTIM_CB * p_cb,uint16_t period,uint8_t timer_id)46 void nfa_sys_ptim_init(tPTIM_CB* p_cb, uint16_t period, uint8_t timer_id) {
47 GKI_init_timer_list(&p_cb->timer_queue);
48 p_cb->period = period;
49 p_cb->timer_id = timer_id;
50 }
51
52 /*******************************************************************************
53 **
54 ** Function nfa_sys_ptim_timer_update
55 **
56 ** Description Update the protocol timer list and handle expired timers.
57 ** This function is called from the task running the protocol
58 ** timers when the periodic GKI timer expires.
59 **
60 ** Returns void
61 **
62 *******************************************************************************/
nfa_sys_ptim_timer_update(tPTIM_CB * p_cb)63 void nfa_sys_ptim_timer_update(tPTIM_CB* p_cb) {
64 TIMER_LIST_ENT* p_tle;
65 NFC_HDR* p_msg;
66 uint32_t new_ticks_count;
67 int32_t period_in_ticks;
68
69 /* To handle the case when the function is called less frequently than the
70 period
71 we must convert determine the number of ticks since the last update, then
72 convert back to milliseconds before updating timer list */
73 new_ticks_count = GKI_get_tick_count();
74
75 /* Check for wrapped condition */
76 if (new_ticks_count >= p_cb->last_gki_ticks) {
77 period_in_ticks = (int32_t)(new_ticks_count - p_cb->last_gki_ticks);
78 } else {
79 period_in_ticks = (int32_t)(((uint32_t)0xffffffff - p_cb->last_gki_ticks) +
80 new_ticks_count + 1);
81 }
82
83 /* update timer list */
84 GKI_update_timer_list(&p_cb->timer_queue, GKI_TICKS_TO_MS(period_in_ticks));
85
86 p_cb->last_gki_ticks = new_ticks_count;
87
88 /* while there are expired timers */
89 while (!GKI_timer_list_empty(&p_cb->timer_queue) &&
90 (GKI_timer_list_first(&p_cb->timer_queue)->ticks <= 0)) {
91 /* removed expired timer from list */
92 p_tle = GKI_timer_list_first(&p_cb->timer_queue);
93 DLOG_IF(INFO, nfc_debug_enabled)
94 << StringPrintf("nfa_sys_ptim_timer_update expired: %p", 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 (*p_tle->p_cback)(p_tle);
100 } else if (p_tle->event) {
101 p_msg = (NFC_HDR*)GKI_getbuf(sizeof(NFC_HDR));
102 if (p_msg != nullptr) {
103 p_msg->event = p_tle->event;
104 p_msg->layer_specific = 0;
105 nfa_sys_sendmsg(p_msg);
106 }
107 }
108 }
109
110 /* if timer list is empty stop periodic GKI timer */
111 if (GKI_timer_list_empty(&p_cb->timer_queue)) {
112 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("ptim timer stop");
113 GKI_stop_timer(p_cb->timer_id);
114 }
115 }
116
117 /*******************************************************************************
118 **
119 ** Function nfa_sys_ptim_start_timer
120 **
121 ** Description Start a protocol timer for the specified amount
122 ** of time in seconds.
123 **
124 ** Returns void
125 **
126 *******************************************************************************/
nfa_sys_ptim_start_timer(tPTIM_CB * p_cb,TIMER_LIST_ENT * p_tle,uint16_t type,int32_t timeout)127 void nfa_sys_ptim_start_timer(tPTIM_CB* p_cb, TIMER_LIST_ENT* p_tle,
128 uint16_t type, int32_t timeout) {
129 DLOG_IF(INFO, nfc_debug_enabled)
130 << StringPrintf("nfa_sys_ptim_start_timer %p", p_tle);
131
132 /* if timer list is currently empty, start periodic GKI timer */
133 if (GKI_timer_list_empty(&p_cb->timer_queue)) {
134 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("ptim timer start");
135 p_cb->last_gki_ticks = GKI_get_tick_count();
136 GKI_start_timer(p_cb->timer_id, GKI_MS_TO_TICKS(p_cb->period), true);
137 }
138
139 GKI_remove_from_timer_list(&p_cb->timer_queue, p_tle);
140
141 p_tle->event = type;
142 p_tle->ticks = timeout;
143
144 GKI_add_to_timer_list(&p_cb->timer_queue, p_tle);
145 }
146
147 /*******************************************************************************
148 **
149 ** Function nfa_sys_ptim_stop_timer
150 **
151 ** Description Stop a protocol timer.
152 **
153 ** Returns void
154 **
155 *******************************************************************************/
nfa_sys_ptim_stop_timer(tPTIM_CB * p_cb,TIMER_LIST_ENT * p_tle)156 void nfa_sys_ptim_stop_timer(tPTIM_CB* p_cb, TIMER_LIST_ENT* p_tle) {
157 DLOG_IF(INFO, nfc_debug_enabled)
158 << StringPrintf("nfa_sys_ptim_stop_timer %p", p_tle);
159
160 GKI_remove_from_timer_list(&p_cb->timer_queue, p_tle);
161
162 /* if timer list is empty stop periodic GKI timer */
163 if (GKI_timer_list_empty(&p_cb->timer_queue)) {
164 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("ptim timer stop");
165 GKI_stop_timer(p_cb->timer_id);
166 }
167 }
168