FreeCalypso > hg > fc-magnetite

comparison src/cs/riviera/rvt/rvt_keepalive.c @ 319:9ffdfacfe969

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implemented pseudo-modem keepalive for C139 and Pirelli targets
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 03 Dec 2017 03:51:28 +0000
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318:6cea809631d7 319:9ffdfacfe969
1 /*
2 * This module is a FreeCalypso addition. Here we implement the special
3 * operation mode that is only used when a device that was originally
4 * meant to be a phone handset is turned into a pseudo-modem with no UI,
5 * requiring connection to a host computer running rvinterf for control.
6 */
7
8 #ifdef PSEUDO_MODEM_KEEPALIVE
9
10 #include "nucleus.h"
11
12 #include "abb.h"
13
14 #include "rv/general.h"
15 #include "rv/rv_general.h"
16 #include "rvf/rvf_api.h"
17 #include "rvt/rvt_gen.h"
18 #include "rvt/rvt_def_i.h"
19 #include "rvt/rvt_env.h"
20 #include "rvt/rvt_env_i.h"
21 #include "rvm/rvm_use_id_list.h"
22
23 #include "uart/serialswitch.h"
24
25 #include <string.h>
26
27 volatile UINT8 rvt_keepalive_counter;
28
29 void rvt_keepalive_input(T_RVT_BUFFER p_msg, UINT16 msg_length)
30 {
31 /* Checking for an invalid PDU. */
32 if ((p_msg == NULL) || (msg_length != 1))
33 return;
34
35 /* Check for the correct opcode */
36 if (*p_msg != 'A')
37 return;
38
39 /* good keepalive response from external host */
40 rvt_keepalive_counter = 0;
41 }
42
43 void rvt_keepalive_register(void)
44 {
45 T_RVT_USER_ID rvt_id;
46
47 rvt_register_id("KEEPALIVE", &rvt_id, rvt_keepalive_input);
48 }
49
50 static void keepalive_send(UINT8 *buf, UINT32 size)
51 {
52 UINT32 sent;
53
54 for (sent = 0; sent < size; )
55 sent += SER_tr_WriteNBytes(SER_LAYER_1, buf + sent,
56 size - sent);
57 }
58
59 #ifdef PSEUDO_MODEM_USB
60 static char poweroff_msg[] = "System: USB unplugged, powering off";
61 #else
62 static char poweroff_msg[] = "System: no keepalive response, powering off";
63 static UINT8 keepalive_msg[2] = {RVT_KEEPALIVE_HEADER, 'Q'};
64 #endif
65
66 static void keepalive_poweroff(void)
67 {
68 UINT8 poweroff_msg_buf[50], *p;
69
70 p = poweroff_msg_buf;
71 *p++ = RVT_RV_HEADER;
72 *p++ = 0;
73 *p++ = 0;
74 *p++ = 0;
75 *p++ = 0;
76 *p++ = RV_TRACE_LEVEL_ERROR;
77 strcpy((char *)p, poweroff_msg);
78 keepalive_send(poweroff_msg_buf, strlen(poweroff_msg) + 6);
79 /* do it */
80 ABB_Power_Off();
81 }
82
83 void rvt_keepalive_process(void)
84 {
85 SYS_UWORD16 abb_status;
86
87 abb_status = ABB_Read_Status();
88 if (abb_status & CHGPRES) {
89 rvt_keepalive_counter = 0;
90 return;
91 }
92
93 #ifdef PSEUDO_MODEM_USB
94 keepalive_poweroff();
95 #else
96 if (rvt_keepalive_counter >= 3)
97 keepalive_poweroff();
98 else {
99 rvt_keepalive_counter++;
100 keepalive_send(keepalive_msg, sizeof keepalive_msg);
101 }
102 #endif
103 }
104
105 #endif