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 *
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*******************************************************************************/
43void 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*******************************************************************************/
61void 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*******************************************************************************/
131void 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*******************************************************************************/
160void 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