1 /******************************************************************************
2 *
3 * Copyright (C) 2010-2012 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
25 #include "nfc_target.h"
26 #include "gki.h"
27 #include "nfa_sys_ptim.h"
28 #include "nfa_sys.h"
29 #include "nfa_sys_int.h"
30
31 /*******************************************************************************
32 **
33 ** Function nfa_sys_ptim_init
34 **
35 ** Description Initialize a protocol timer control block. Parameter
36 ** period is the GKI timer period in milliseconds. Parameter
37 ** timer_id is the GKI timer id.
38 **
39 ** Returns void
40 **
41 *******************************************************************************/
nfa_sys_ptim_init(tPTIM_CB * p_cb,UINT16 period,UINT8 timer_id)42 void nfa_sys_ptim_init (tPTIM_CB *p_cb, UINT16 period, UINT8 timer_id)
43 {
44 GKI_init_timer_list (&p_cb->timer_queue);
45 p_cb->period = period;
46 p_cb->timer_id = timer_id;
47 }
48
49 /*******************************************************************************
50 **
51 ** Function nfa_sys_ptim_timer_update
52 **
53 ** Description Update the protocol timer list and handle expired timers.
54 ** This function is called from the task running the protocol
55 ** timers when the periodic GKI timer expires.
56 **
57 ** Returns void
58 **
59 *******************************************************************************/
nfa_sys_ptim_timer_update(tPTIM_CB * p_cb)60 void nfa_sys_ptim_timer_update (tPTIM_CB *p_cb)
61 {
62 TIMER_LIST_ENT *p_tle;
63 BT_HDR *p_msg;
64 UINT32 new_ticks_count;
65 INT32 period_in_ticks;
66
67 /* To handle the case when the function is called less frequently than the period
68 we must convert determine the number of ticks since the last update, then
69 convert back to milliseconds before updating timer list */
70 new_ticks_count = GKI_get_tick_count ();
71
72 /* Check for wrapped condition */
73 if (new_ticks_count >= p_cb->last_gki_ticks)
74 {
75 period_in_ticks = (INT32) (new_ticks_count - p_cb->last_gki_ticks);
76 }
77 else
78 {
79 period_in_ticks = (INT32) (((UINT32) 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 ((p_cb->timer_queue.p_first) && (p_cb->timer_queue.p_first->ticks <= 0))
90 {
91 /* removed expired timer from list */
92 p_tle = p_cb->timer_queue.p_first;
93 NFA_TRACE_DEBUG1 ("nfa_sys_ptim_timer_update expired: %08x", 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 {
99 (*p_tle->p_cback) (p_tle);
100 }
101 else if (p_tle->event)
102 {
103 if ((p_msg = (BT_HDR *) GKI_getbuf (sizeof (BT_HDR))) != NULL)
104 {
105 p_msg->event = p_tle->event;
106 p_msg->layer_specific = 0;
107 nfa_sys_sendmsg (p_msg);
108 }
109 }
110 }
111
112 /* if timer list is empty stop periodic GKI timer */
113 if (p_cb->timer_queue.p_first == NULL)
114 {
115 NFA_TRACE_DEBUG0 ("ptim timer stop");
116 GKI_stop_timer (p_cb->timer_id);
117 }
118 }
119
120 /*******************************************************************************
121 **
122 ** Function nfa_sys_ptim_start_timer
123 **
124 ** Description Start a protocol timer for the specified amount
125 ** of time in seconds.
126 **
127 ** Returns void
128 **
129 *******************************************************************************/
nfa_sys_ptim_start_timer(tPTIM_CB * p_cb,TIMER_LIST_ENT * p_tle,UINT16 type,INT32 timeout)130 void nfa_sys_ptim_start_timer (tPTIM_CB *p_cb, TIMER_LIST_ENT *p_tle, UINT16 type, INT32 timeout)
131 {
132 NFA_TRACE_DEBUG1 ("nfa_sys_ptim_start_timer %08x", p_tle);
133
134 /* if timer list is currently empty, start periodic GKI timer */
135 if (p_cb->timer_queue.p_first == NULL)
136 {
137 NFA_TRACE_DEBUG0 ("ptim timer start");
138 p_cb->last_gki_ticks = GKI_get_tick_count ();
139 GKI_start_timer (p_cb->timer_id, GKI_MS_TO_TICKS (p_cb->period), TRUE);
140 }
141
142 GKI_remove_from_timer_list (&p_cb->timer_queue, p_tle);
143
144 p_tle->event = type;
145 p_tle->ticks = timeout;
146
147 GKI_add_to_timer_list (&p_cb->timer_queue, p_tle);
148 }
149
150 /*******************************************************************************
151 **
152 ** Function nfa_sys_ptim_stop_timer
153 **
154 ** Description Stop a protocol timer.
155 **
156 ** Returns void
157 **
158 *******************************************************************************/
nfa_sys_ptim_stop_timer(tPTIM_CB * p_cb,TIMER_LIST_ENT * p_tle)159 void nfa_sys_ptim_stop_timer (tPTIM_CB *p_cb, TIMER_LIST_ENT *p_tle)
160 {
161 NFA_TRACE_DEBUG1 ("nfa_sys_ptim_stop_timer %08x", p_tle);
162
163 GKI_remove_from_timer_list (&p_cb->timer_queue, p_tle);
164
165 /* if timer list is empty stop periodic GKI timer */
166 if (p_cb->timer_queue.p_first == NULL)
167 {
168 NFA_TRACE_DEBUG0 ("ptim timer stop");
169 GKI_stop_timer (p_cb->timer_id);
170 }
171 }
172