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annotate src/cs/riviera/rvt/rvt_keepalive.c @ 550:a1da09e02973

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doc/Config-vars: TRACEMASK_IN_FFS addition documented
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 18 Nov 2018 08:59:50 +0000
parents 9ffdfacfe969
children
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9ffdfacfe969 implemented pseudo-modem keepalive for C139 and Pirelli targets
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1 /*
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2 * This module is a FreeCalypso addition. Here we implement the special
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3 * operation mode that is only used when a device that was originally
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4 * meant to be a phone handset is turned into a pseudo-modem with no UI,
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5 * requiring connection to a host computer running rvinterf for control.
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6 */
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7
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8 #ifdef PSEUDO_MODEM_KEEPALIVE
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9
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10 #include "nucleus.h"
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11
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12 #include "abb.h"
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13
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14 #include "rv/general.h"
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15 #include "rv/rv_general.h"
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16 #include "rvf/rvf_api.h"
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17 #include "rvt/rvt_gen.h"
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18 #include "rvt/rvt_def_i.h"
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19 #include "rvt/rvt_env.h"
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20 #include "rvt/rvt_env_i.h"
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21 #include "rvm/rvm_use_id_list.h"
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22
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23 #include "uart/serialswitch.h"
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24
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25 #include <string.h>
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26
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27 volatile UINT8 rvt_keepalive_counter;
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28
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29 void rvt_keepalive_input(T_RVT_BUFFER p_msg, UINT16 msg_length)
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30 {
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31 /* Checking for an invalid PDU. */
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32 if ((p_msg == NULL) || (msg_length != 1))
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33 return;
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34
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35 /* Check for the correct opcode */
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36 if (*p_msg != 'A')
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37 return;
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38
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39 /* good keepalive response from external host */
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40 rvt_keepalive_counter = 0;
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41 }
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42
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43 void rvt_keepalive_register(void)
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44 {
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45 T_RVT_USER_ID rvt_id;
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46
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47 rvt_register_id("KEEPALIVE", &rvt_id, rvt_keepalive_input);
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48 }
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49
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50 static void keepalive_send(UINT8 *buf, UINT32 size)
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51 {
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52 UINT32 sent;
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53
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54 for (sent = 0; sent < size; )
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55 sent += SER_tr_WriteNBytes(SER_LAYER_1, buf + sent,
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56 size - sent);
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57 }
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58
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59 #ifdef PSEUDO_MODEM_USB
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60 static char poweroff_msg[] = "System: USB unplugged, powering off";
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61 #else
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62 static char poweroff_msg[] = "System: no keepalive response, powering off";
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63 static UINT8 keepalive_msg[2] = {RVT_KEEPALIVE_HEADER, 'Q'};
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64 #endif
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65
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66 static void keepalive_poweroff(void)
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67 {
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68 UINT8 poweroff_msg_buf[50], *p;
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69
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70 p = poweroff_msg_buf;
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71 *p++ = RVT_RV_HEADER;
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72 *p++ = 0;
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73 *p++ = 0;
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74 *p++ = 0;
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75 *p++ = 0;
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76 *p++ = RV_TRACE_LEVEL_ERROR;
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77 strcpy((char *)p, poweroff_msg);
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78 keepalive_send(poweroff_msg_buf, strlen(poweroff_msg) + 6);
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79 /* do it */
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80 ABB_Power_Off();
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81 }
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82
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83 void rvt_keepalive_process(void)
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84 {
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85 SYS_UWORD16 abb_status;
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86
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87 abb_status = ABB_Read_Status();
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88 if (abb_status & CHGPRES) {
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89 rvt_keepalive_counter = 0;
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90 return;
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91 }
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92
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93 #ifdef PSEUDO_MODEM_USB
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94 keepalive_poweroff();
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95 #else
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96 if (rvt_keepalive_counter >= 3)
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97 keepalive_poweroff();
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98 else {
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99 rvt_keepalive_counter++;
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100 keepalive_send(keepalive_msg, sizeof keepalive_msg);
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101 }
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102 #endif
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103 }
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104
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105 #endif