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vdr/diseqc.c

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/*
* diseqc.c: DiSEqC handling
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: diseqc.c 4.1 2017/01/09 15:10:40 kls Exp $
*/
#include "diseqc.h"
#include <ctype.h>
#include <linux/dvb/frontend.h>
#include <sys/ioctl.h>
#include "sources.h"
#include "thread.h"
#define ALL_DEVICES (~0) // all bits set to '1'
#define MAX_DEVICES 32 // each bit in a 32-bit integer represents one device
static int CurrentDevices = 0;
static bool IsDeviceNumbers(const char *s)
{
return *s && s[strlen(s) - 1] == ':';
}
static bool ParseDeviceNumbers(const char *s)
{
if (IsDeviceNumbers(s)) {
CurrentDevices = 0;
const char *p = s;
while (*p && *p != ':') {
char *t = NULL;
int d = strtol(p, &t, 10);
p = t;
if (0 < d && d <= MAX_DEVICES)
CurrentDevices |= (1 << d - 1);
else {
esyslog("ERROR: invalid device number %d in '%s'", d, s);
return false;
}
}
}
return true;
}
// --- cDiseqcPositioner -----------------------------------------------------
// See http://www.eutelsat.com/files/live/sites/eutelsatv2/files/contributed/satellites/pdf/Diseqc/associated%20docs/positioner_appli_notice.pdf
cDiseqcPositioner::cDiseqcPositioner(void)
{
SetCapabilities(pcCanDrive |
pcCanStep |
pcCanHalt |
pcCanSetLimits |
pcCanDisableLimits |
pcCanEnableLimits |
pcCanStorePosition |
pcCanRecalcPositions |
pcCanGotoPosition |
pcCanGotoAngle
);
}
void cDiseqcPositioner::SendDiseqc(uint8_t *Codes, int NumCodes)
{
struct dvb_diseqc_master_cmd cmd;
NumCodes = min(NumCodes, int(sizeof(cmd.msg) - 2));
cmd.msg_len = 0;
cmd.msg[cmd.msg_len++] = 0xE0;
cmd.msg[cmd.msg_len++] = 0x31;
for (int i = 0; i < NumCodes; i++)
cmd.msg[cmd.msg_len++] = Codes[i];
CHECK(ioctl(Frontend(), FE_DISEQC_SEND_MASTER_CMD, &cmd));
}
void cDiseqcPositioner::Drive(ePositionerDirection Direction)
{
uint8_t Code[] = { uint8_t(Direction == pdLeft ? 0x68 : 0x69), 0x00 };
SendDiseqc(Code, 2);
}
void cDiseqcPositioner::Step(ePositionerDirection Direction, uint Steps)
{
if (Steps == 0)
return;
uint8_t Code[] = { uint8_t(Direction == pdLeft ? 0x68 : 0x69), 0xFF };
Code[1] -= min(Steps, uint(0x7F)) - 1;
SendDiseqc(Code, 2);
}
void cDiseqcPositioner::Halt(void)
{
uint8_t Code[] = { 0x60 };
SendDiseqc(Code, 1);
}
void cDiseqcPositioner::SetLimit(ePositionerDirection Direction)
{
uint8_t Code[] = { uint8_t(Direction == pdLeft ? 0x66 : 0x67) };
SendDiseqc(Code, 1);
}
void cDiseqcPositioner::DisableLimits(void)
{
uint8_t Code[] = { 0x63 };
SendDiseqc(Code, 1);
}
void cDiseqcPositioner::EnableLimits(void)
{
uint8_t Code[] = { 0x6A, 0x00 };
SendDiseqc(Code, 2);
}
void cDiseqcPositioner::StorePosition(uint Number)
{
uint8_t Code[] = { 0x6A, uint8_t(Number) };
SendDiseqc(Code, 2);
}
void cDiseqcPositioner::RecalcPositions(uint Number)
{
uint8_t Code[] = { 0x6F, uint8_t(Number), 0x00, 0x00 };
SendDiseqc(Code, 4);
}
void cDiseqcPositioner::GotoPosition(uint Number, int Longitude)
{
uint8_t Code[] = { 0x6B, uint8_t(Number) };
SendDiseqc(Code, 2);
cPositioner::GotoPosition(Number, Longitude);
}
void cDiseqcPositioner::GotoAngle(int Longitude)
{
uint8_t Code[] = { 0x6E, 0x00, 0x00 };
int Angle = CalcHourAngle(Longitude);
int a = abs(Angle);
Code[1] = a / 10 / 16;
Code[2] = a / 10 % 16 * 16 + a % 10 * 16 / 10;
Code[1] |= (Angle < 0) ? 0xE0 : 0xD0;
SendDiseqc(Code, 3);
cPositioner::GotoAngle(Longitude);
}
// --- cScr ------------------------------------------------------------------
cScr::cScr(void)
{
devices = 0;
channel = -1;
userBand = 0;
pin = -1;
used = false;
}
bool cScr::Parse(const char *s)
{
if (IsDeviceNumbers(s))
return ParseDeviceNumbers(s);
devices = CurrentDevices;
bool result = false;
int fields = sscanf(s, "%d %u %d", &channel, &userBand, &pin);
if (fields == 2 || fields == 3) {
if (channel >= 0 && channel < 32) {
result = true;
if (fields == 3 && (pin < 0 || pin > 255)) {
esyslog("Error: invalid SCR pin '%d'", pin);
result = false;
}
}
else
esyslog("Error: invalid SCR channel '%d'", channel);
}
return result;
}
// --- cScrs -----------------------------------------------------------------
cScrs Scrs;
bool cScrs::Load(const char *FileName, bool AllowComments, bool MustExist)
{
CurrentDevices = ALL_DEVICES;
return cConfig<cScr>::Load(FileName, AllowComments, MustExist);
}
cScr *cScrs::GetUnused(int Device)
{
cMutexLock MutexLock(&mutex);
for (cScr *p = First(); p; p = Next(p)) {
if (!IsBitSet(p->Devices(), Device - 1))
continue;
if (!p->Used()) {
p->SetUsed(true);
return p;
}
}
return NULL;
}
// --- cDiseqc ---------------------------------------------------------------
cDiseqc::cDiseqc(void)
{
devices = 0;
source = 0;
slof = 0;
polarization = 0;
lof = 0;
position = -1;
scrBank = -1;
commands = NULL;
parsing = false;
}
cDiseqc::~cDiseqc()
{
free(commands);
}
bool cDiseqc::Parse(const char *s)
{
if (IsDeviceNumbers(s))
return ParseDeviceNumbers(s);
devices = CurrentDevices;
bool result = false;
char *sourcebuf = NULL;
int fields = sscanf(s, "%m[^ ] %d %c %d %m[^\n]", &sourcebuf, &slof, &polarization, &lof, &commands);
if (fields == 4)
commands = NULL; //XXX Apparently sscanf() doesn't work correctly if the last %m argument results in an empty string
if (4 <= fields && fields <= 5) {
source = cSource::FromString(sourcebuf);
if (Sources.Get(source)) {
polarization = char(toupper(polarization));
if (polarization == 'V' || polarization == 'H' || polarization == 'L' || polarization == 'R') {
parsing = true;
const char *CurrentAction = NULL;
while (Execute(&CurrentAction, NULL, NULL, NULL, NULL) != daNone)
;
parsing = false;
result = !commands || !*CurrentAction;
}
else
esyslog("ERROR: unknown polarization '%c'", polarization);
}
else
esyslog("ERROR: unknown source '%s'", sourcebuf);
}
free(sourcebuf);
return result;
}
int cDiseqc::SetScrFrequency(int SatFrequency, const cScr *Scr, uint8_t *Codes) const
{
if ((Codes[0] & 0xF0) == 0x70 ) { // EN50607 aka JESS
int t = SatFrequency == 0 ? 0 : (SatFrequency - 100);
if (t < 2048 && Scr->Channel() >= 0 && Scr->Channel() < 32) {
Codes[1] = t >> 8 | Scr->Channel() << 3;
Codes[2] = t;
Codes[3] = (t == 0 ? 0 : scrBank);
if (t)
return Scr->UserBand();
}
}
else { // EN50494 aka Unicable
int t = SatFrequency == 0 ? 0 : (SatFrequency + Scr->UserBand() + 2) / 4 - 350; // '+ 2' together with '/ 4' results in rounding!
if (t < 1024 && Scr->Channel() >= 0 && Scr->Channel() < 8) {
Codes[3] = t >> 8 | (t == 0 ? 0 : scrBank << 2) | Scr->Channel() << 5;
Codes[4] = t;
if (t)
return (t + 350) * 4 - SatFrequency;
}
}
esyslog("ERROR: invalid SCR channel number %d or frequency %d", Scr->Channel(),SatFrequency);
return 0;
}
int cDiseqc::SetScrPin(const cScr *Scr, uint8_t *Codes) const
{
if ((Codes[0] & 0xF0) == 0x70 ) { // EN50607 aka JESS
if (Scr->Pin() >= 0 && Scr->Pin() <= 255) {
Codes[0] = 0x71;
Codes[4] = Scr->Pin();
return 5;
}
else {
Codes[0] = 0x70;
return 4;
}
}
else { // EN50494 aka Unicable
if (Scr->Pin() >= 0 && Scr->Pin() <= 255) {
Codes[2] = 0x5C;
Codes[5] = Scr->Pin();
return 6;
}
else {
Codes[2] = 0x5A;
return 5;
}
}
}
const char *cDiseqc::Wait(const char *s) const
{
char *p = NULL;
errno = 0;
int n = strtol(s, &p, 10);
if (!errno && p != s && n >= 0) {
if (!parsing)
cCondWait::SleepMs(n);
return p;
}
esyslog("ERROR: invalid value for wait time in '%s'", s - 1);
return NULL;
}
const char *cDiseqc::GetPosition(const char *s) const
{
if (!*s || !isdigit(*s)) {
position = 0;
return s;
}
char *p = NULL;
errno = 0;
int n = strtol(s, &p, 10);
if (!errno && p != s && n >= 0 && n < 0xFF) {
if (parsing) {
if (position < 0)
position = n;
else
esyslog("ERROR: more than one position in '%s'", s - 1);
}
return p;
}
esyslog("ERROR: invalid satellite position in '%s'", s - 1);
return NULL;
}
const char *cDiseqc::GetScrBank(const char *s) const
{
char *p = NULL;
errno = 0;
int n = strtol(s, &p, 10);
if (!errno && p != s && n >= 0 && n < 256) {
if (parsing) {
if (scrBank < 0)
scrBank = n;
else
esyslog("ERROR: more than one scr bank in '%s'", s - 1);
}
return p;
}
esyslog("ERROR: invalid value for scr bank in '%s'", s - 1);
return NULL;
}
const char *cDiseqc::GetCodes(const char *s, uchar *Codes, uint8_t *MaxCodes) const
{
const char *e = strchr(s, ']');
if (e) {
int NumCodes = 0;
const char *t = s;
while (t < e) {
if (NumCodes < MaxDiseqcCodes) {
errno = 0;
char *p;
int n = strtol(t, &p, 16);
if (!errno && p != t && 0 <= n && n <= 255) {
if (Codes) {
if (NumCodes < *MaxCodes)
Codes[NumCodes++] = uchar(n);
else {
esyslog("ERROR: too many codes in code sequence '%s'", s - 1);
return NULL;
}
}
t = skipspace(p);
}
else {
esyslog("ERROR: invalid code at '%s'", t);
return NULL;
}
}
else {
esyslog("ERROR: too many codes in code sequence '%s'", s - 1);
return NULL;
}
}
if (MaxCodes)
*MaxCodes = NumCodes;
return e + 1;
}
else
esyslog("ERROR: missing closing ']' in code sequence '%s'", s - 1);
return NULL;
}
cDiseqc::eDiseqcActions cDiseqc::Execute(const char **CurrentAction, uchar *Codes, uint8_t *MaxCodes, const cScr *Scr, int *Frequency) const
{
if (!*CurrentAction)
*CurrentAction = commands;
while (*CurrentAction && **CurrentAction) {
switch (*(*CurrentAction)++) {
case ' ': break;
case 't': return daToneOff;
case 'T': return daToneOn;
case 'v': return daVoltage13;
case 'V': return daVoltage18;
case 'A': return daMiniA;
case 'B': return daMiniB;
case 'W': *CurrentAction = Wait(*CurrentAction); return daWait;
case 'P': *CurrentAction = GetPosition(*CurrentAction);
if (Setup.UsePositioner)
return position ? daPositionN : daPositionA;
break;
case 'S': *CurrentAction = GetScrBank(*CurrentAction); return daScr;
case '[': *CurrentAction = GetCodes(*CurrentAction, Codes, MaxCodes);
if (*CurrentAction) {
if (Scr && Frequency) {
*Frequency = SetScrFrequency(*Frequency, Scr, Codes);
*MaxCodes = SetScrPin(Scr, Codes);
}
return daCodes;
}
break;
default: esyslog("ERROR: unknown diseqc code '%c'", *(*CurrentAction - 1));
return daNone;
}
}
return daNone;
}
// --- cDiseqcs --------------------------------------------------------------
cDiseqcs Diseqcs;
bool cDiseqcs::Load(const char *FileName, bool AllowComments, bool MustExist)
{
CurrentDevices = ALL_DEVICES;
return cConfig<cDiseqc>::Load(FileName, AllowComments, MustExist);
}
const cDiseqc *cDiseqcs::Get(int Device, int Source, int Frequency, char Polarization, const cScr **Scr) const
{
for (const cDiseqc *p = First(); p; p = Next(p)) {
if (!IsBitSet(p->Devices(), Device - 1))
continue;
if (cSource::Matches(p->Source(), Source) && p->Slof() > Frequency && p->Polarization() == toupper(Polarization)) {
if (p->IsScr() && Scr && !*Scr) {
*Scr = Scrs.GetUnused(Device);
if (*Scr)
dsyslog("SCR %d assigned to device %d", (*Scr)->Channel(), Device);
else
esyslog("ERROR: no free SCR entry available for device %d", Device);
}
return p;
}
}
return NULL;
}
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