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/* $Id: hw_uirt2_common.c,v 5.7 2010/05/25 19:12:26 lirc Exp $ */
/****************************************************************************
** hw_uirt2_common.c *******************************************************
****************************************************************************
*
* Routines for UIRT2 receiver/transmitter
*
* UIRT2 web site: http://users.skynet.be/sky50985/
*
* Copyright (C) 2003 Mikael Magnusson <mikma@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
//#define DEBUG
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdarg.h>
#include <errno.h>
#include "serial.h"
#include "lircd.h"
#include "hw_uirt2_common.h"
#define PRINT_TIME(a) \
LOGPRINTF(1, "time: %s %li %li", #a, (a)->tv_sec, (a)->tv_usec)
#ifdef DEBUG
#define HEXDUMP(buf, len) hexdump(buf, len)
#else
#define HEXDUMP(buf, len)
#endif
struct tag_uirt2_t {
int fd;
int flags;
int version;
struct timeval pre_delay;
struct timeval pre_time;
int new_signal;
};
const int unit = UIRT2_UNIT;
//static int debug = 3;
static ssize_t readagain(int fd, void *buf, size_t count)
{
ssize_t rc;
size_t pos=0;
struct timeval timeout = { .tv_sec = 0, .tv_usec = 200000 };
fd_set fds;
rc=read(fd, buf, count);
if(rc > 0)
{
pos+=rc;
}
while( (rc == -1 && errno == EAGAIN) || (rc >= 0 && pos < count) )
{
FD_ZERO(&fds);
FD_SET(fd,&fds);
rc=select(fd + 1, &fds, NULL, NULL, &timeout);
if(rc == 0)
{
/* timeout */
break;
}
else if(rc == -1)
{
/* continue for EAGAIN case */
continue;
}
rc=read(fd, ((char *)buf) + pos, count-pos);
if(rc > 0)
{
pos+=rc;
}
}
return (pos == 0) ? -1 : pos;
}
#ifdef DEBUG
static void hexdump(byte_t *buf, int len)
{
int i;
char str[200];
int pos = 0;
for (i = 0; i < len; i++) {
if (pos + 3 >= sizeof(str)) {
break;
}
if (!(i % 8)) {
str[pos++] = ' ';
}
sprintf(str + pos, "%02x ", buf[i]);
pos += 3;
}
logprintf(LOG_DEBUG, "%s", str);
}
#endif /* DEBUG */
static int mywaitfordata(uirt2_t *dev, long usec) {
int fd = dev->fd;
fd_set fds;
int maxfd = fd;
int ret;
struct timeval tv;
FD_ZERO(&fds);
FD_SET(fd,&fds);
tv.tv_sec = 0;
tv.tv_usec = usec;
ret = select(maxfd + 1, &fds, NULL, NULL, &tv);
if (ret <= 0) {
return 0;
} else {
return 1;
}
}
static int uirt2_readflush(uirt2_t *dev, long timeout)
{
int res;
char c;
while(mywaitfordata(dev, timeout) > 0) {
res = readagain(dev->fd, &c, 1);
if (res < 1) {
return -1;
}
}
return 0;
}
static byte_t checksum(byte_t *data, int len)
{
int check = 0;
int i;
for (i = 0; i < len; i++) {
check = check - data[i];
}
return check & 0xff;
}
static int command_ext(uirt2_t *dev, const byte_t *in, byte_t *out)
{
byte_t tmp[1024];
int res;
int len = in[0];
const byte_t *buf = in + 1;
memcpy(tmp, buf, len + 1);
tmp[len + 1] = checksum(tmp, len + 1) & 0xff;
if (timerisset(&dev->pre_delay))
{
struct timeval cur;
struct timeval diff;
struct timeval delay;
gettimeofday(&cur, NULL);
timersub(&cur, &dev->pre_time, &diff);
PRINT_TIME(&diff);
if(timercmp(&dev->pre_delay, &diff, >))
{
timersub(&dev->pre_delay, &diff, &delay);
PRINT_TIME(&delay);
LOGPRINTF(1, "udelay %lu %lu",
delay.tv_sec, delay.tv_usec);
sleep(delay.tv_sec);
usleep(delay.tv_usec);
}
timerclear(&dev->pre_delay);
}
uirt2_readflush(dev, 0);
LOGPRINTF(1, "writing command %02x", buf[0]);
HEXDUMP(tmp, len + 2);
res = write(dev->fd, tmp, len + 2);
if (res < len + 2) {
logprintf(LOG_ERR, "uirt2_raw: couldn't write command");
return -1;
}
LOGPRINTF(1, "wrote %d", res);
if (!mywaitfordata(dev, (long) 1000000)) {
logprintf(LOG_ERR, "uirt2_raw: did not receive results");
return -1;
}
res = readagain(dev->fd, out + 1, out[0]);
if (res < out[0]) {
logprintf(LOG_ERR, "uirt2_raw: couldn't read command result");
return -1;
}
LOGPRINTF(1, "cmd res %d:", res);
HEXDUMP(out + 1, out[0]);
LOGPRINTF(1, "");
if (out[0] > 1) {
int check = checksum(out + 1, out[0]);
if (check != 0) {
logprintf(LOG_ERR, "uirt2_raw: checksum error");
return -1;
}
}
return 0;
}
static int command(uirt2_t *dev, const byte_t *buf, int len)
{
byte_t in[1024];
byte_t out[2];
memcpy(in + 1, buf, len+1);
in[0] = len;
out[0] = 1;
if (command_ext(dev, in, out) < 0) {
return -1;
}
return out[1] < UIRT2_CSERROR;
}
static unsigned long calc_bits_length(remstruct1_data_t *buf)
{
int i;
byte_t b = 0;
unsigned long len = 0;
for (i = 0; i < buf->bBits; i++) {
int bit;
if (!(i % 8)) {
b = buf->bDatBits[i / 8];
}
bit = b & 1;
b = b >> 1;
if (i % 2) {
// Odd
if (bit) {
len += buf->bOff1;
} else {
len += buf->bOff0;
}
} else {
// Even
if (bit) {
len += buf->bOn1;
} else {
len += buf->bOn0;
}
}
}
return unit * len;
}
static unsigned long calc_struct1_length(int repeat, remstruct1_data_t *buf)
{
int bISDly = unit * (buf->bISDlyLo + 256 * buf->bISDlyHi);
int bHdr = unit * (buf->bHdr1 + buf->bHdr0);
unsigned long bBitLength = calc_bits_length(buf);
LOGPRINTF(1, "bBitLength %lu repeat %d", bBitLength, repeat);
return (repeat + 1) * (bISDly + bHdr + bBitLength);
}
/*
* Exported functions
*/
uirt2_t *uirt2_init(int fd)
{
uirt2_t *dev = (uirt2_t *)malloc(sizeof(uirt2_t));
if(dev == NULL)
{
logprintf(LOG_ERR, "uirt2_raw: out of memory");
return NULL;
}
memset(dev, 0, sizeof(uirt2_t));
timerclear(&dev->pre_time);
dev->new_signal = 1;
dev->flags = UIRT2_MODE_UIR;
dev->fd = fd;
uirt2_readflush(dev, 200000);
if(uirt2_getversion(dev, &dev->version) < 0) {
free(dev);
return NULL;
}
if(dev->version < 0x0104) {
logprintf(LOG_WARNING, "uirt2_raw: Old UIRT hardware");
} else {
logprintf(LOG_INFO, "uirt2_raw: UIRT version %04x ok",
dev->version);
}
return dev;
}
int uirt2_uninit(uirt2_t *dev)
{
free(dev);
return 0;
}
int uirt2_getmode(uirt2_t *dev)
{
return (dev->flags & UIRT2_MODE_MASK);
}
int uirt2_setmode(uirt2_t *dev, int mode)
{
byte_t buf[20];
byte_t cmd;
if (uirt2_getmode(dev) == mode)
{
LOGPRINTF(1, "uirt2_setmode: already in requested mode");
return 0;
}
switch(mode) {
case UIRT2_MODE_UIR:
cmd = UIRT2_SETMODEUIR;
break;
case UIRT2_MODE_RAW:
cmd = UIRT2_SETMODERAW;
break;
case UIRT2_MODE_STRUC:
cmd = UIRT2_SETMODESTRUC;
break;
default:
logprintf(LOG_ERR, "uirt2_raw: bad mode");
return -1;
}
buf[0] = cmd;
if (command(dev, buf, 0) < 0) {
logprintf(LOG_ERR, "uirt2_raw: setmode failed");
return -1;
}
dev->flags = (dev->flags & ~UIRT2_MODE_MASK) | mode;
return 0;
}
int uirt2_setmodeuir(uirt2_t *dev)
{
return uirt2_setmode(dev, UIRT2_MODE_UIR);
}
int uirt2_setmoderaw(uirt2_t *dev)
{
return uirt2_setmode(dev, UIRT2_MODE_RAW);
}
int uirt2_setmodestruc(uirt2_t *dev)
{
return uirt2_setmode(dev, UIRT2_MODE_STRUC);
}
int uirt2_getversion(uirt2_t *dev, int *version)
{
byte_t out[20];
byte_t in[20];
if(dev->version != 0)
{
*version = dev->version;
return 0;
}
in[0] = 0;
in[1] = UIRT2_GETVERSION;
out[0] = 3;
if (command_ext(dev, in, out) >= 0) {
*version = out[2] + (out[1] << 8);
return 0;
}
/*
* Ok, that command didn't work. Maybe we're
* dealing with a newer version of the UIRT2
* protocol, which sends extended information when
* the version is requested.
*/
LOGPRINTF(0, "uirt2: detection of uirt2 failed");
LOGPRINTF(0, "uirt2: trying to detect newer uirt firmware");
uirt2_readflush(dev, 200000);
out[0] = 8;
if (command_ext(dev, in, out) >= 0) {
*version = out[2] + (out[1] << 8);
return 0;
}
return -1;
}
int uirt2_getgpiocaps(uirt2_t *dev, int *slots, byte_t masks[4])
{
byte_t in[3];
byte_t out[6];
in[0] = 1;
in[1] = UIRT2_GETGPIOCAPS;
in[2] = 1;
out[0] = 6;
if (command_ext(dev, in, out) < 0) {
return -1;
}
*slots = out[1];
memcpy(masks, out + 2, 4);
return 0;
}
int uirt2_getgpiocfg(uirt2_t *dev, int slot, uirt2_code_t code,
int *action, int *duration)
{
byte_t in[4];
byte_t out[10];
in[0] = 2;
in[1] = UIRT2_GETGPIOCFG;
in[2] = 2;
in[3] = slot;
out[0] = 9;
if(command_ext(dev, in, out) < 0) {
return -1;
}
memcpy(code, out + 1, UIRT2_CODE_SIZE);
*action = out[UIRT2_CODE_SIZE + 1];
*duration = out[UIRT2_CODE_SIZE + 2] * 5;
return 0;
}
int uirt2_setgpiocfg(uirt2_t *dev, int slot, uirt2_code_t code,
int action, int duration)
{
byte_t in[12];
in[0] = 2;
in[1] = UIRT2_SETGPIOCFG;
in[2] = 4 + UIRT2_CODE_SIZE;
in[3] = slot;
memcpy(in + 4, code, UIRT2_CODE_SIZE);
in[10] = action;
in[11] = duration / 5;
return command(dev, in + 1, in[0]);
}
int uirt2_getgpio(uirt2_t *dev, byte_t ports[4])
{
byte_t in[3];
byte_t out[6];
in[0] = 21;
in[1] = UIRT2_GETGPIO;
in[2] = 1;
out[0] = 5;
if(command_ext(dev, in, out) < 0) {
return -1;
}
memcpy(ports, out + 1, 4);
return 0;
}
int uirt2_setgpio(uirt2_t *dev, int action, int duration)
{
byte_t buf[20];
buf[0] = UIRT2_SETGPIO;
buf[1] = 3;
buf[2] = action;
buf[3] = duration / 5;
return command(dev, buf, 3);
}
int uirt2_refreshgpio(uirt2_t *dev)
{
byte_t buf[2];
buf[0] = UIRT2_REFRESHGPIO;
buf[1] = 1;
return command(dev, buf, 1);
}
int uirt2_read_uir(uirt2_t *dev, byte_t *buf, int length)
{
int pos = 0;
int res;
if (uirt2_getmode(dev) != UIRT2_MODE_UIR) {
logprintf(LOG_ERR, "uirt2_raw: Not in UIR mode");
return -1;
}
while (1) {
res = readagain(dev->fd, buf + pos, 1);
if (res == -1) {
return pos;
}
pos += res;
if (pos == 6) {
break;
}
}
return pos;
}
lirc_t uirt2_read_raw(uirt2_t *dev, lirc_t timeout)
{
lirc_t data;
static int pulse = 0;
if (uirt2_getmode(dev) != UIRT2_MODE_RAW) {
logprintf(LOG_ERR, "uirt2_raw: Not in RAW mode");
return -1;
}
while (1) {
int res;
byte_t b;
if (!waitfordata(timeout))
return 0;
res = readagain(dev->fd, &b, 1);
if (res == -1) {
return 0;
}
LOGPRINTF(3, "read_raw %02x", b);
if (b == 0xff) {
dev->new_signal = 1;
continue;
}
if (dev->new_signal) {
byte_t isdly[2];
isdly[0] = b;
LOGPRINTF(1, "dev->new_signal");
res = readagain(dev->fd, &isdly[1], 1);
if (res == -1) {
return 0;
}
data = UIRT2_UNIT * (256 * isdly[0] + isdly[1]);
pulse = 1;
dev->new_signal = 0;
} else {
data = UIRT2_UNIT * b;
if(data == 0) data = 1;
if (pulse) {
data = data | PULSE_BIT;
}
pulse = !pulse;
}
return data;
}
return 0;
}
int uirt2_send_raw(uirt2_t *dev, byte_t *buf, int length)
{
byte_t tmp[1024];
tmp[0] = UIRT2_DOTXRAW;
tmp[1] = length + 1;
memcpy(tmp + 2, buf, length);
return command(dev, tmp, length + 1);
}
int uirt2_send_struct1(uirt2_t *dev, int freq, int bRepeatCount,
remstruct1_data_t *buf)
{
int res;
unsigned long delay;
remstruct1_t rem;
remstruct1_ext_t rem_ext;
if(dev->version >= 0x0905)
{
byte_t tmp[2+sizeof(remstruct1_ext_t)];
if(freq == 0 || ((5000000 / freq) + 1)/2 >= 0x80)
{
rem_ext.bFrequency = 0x80;
}
else
{
rem_ext.bFrequency = ((5000000 / freq) + 1)/2;
}
rem_ext.bRepeatCount = bRepeatCount;
memcpy(&rem_ext.data, buf, sizeof(*buf));
tmp[0] = 0x37;
tmp[1] = sizeof(rem_ext) + 1;
memcpy(tmp + 2, &rem_ext, sizeof(rem_ext));
res = command(dev, tmp, sizeof(rem_ext) + 1);
}
else
{
if(bRepeatCount > 0x1f)
{
rem.bCmd = uirt2_calc_freq(freq) + 0x1f;
}
else
{
rem.bCmd = uirt2_calc_freq(freq) + bRepeatCount;
}
memcpy(&rem.data, buf, sizeof(*buf));
res = command(dev, (byte_t *) &rem, sizeof(rem) - 2);
}
delay = calc_struct1_length(bRepeatCount, buf);
gettimeofday(&dev->pre_time, NULL);
dev->pre_delay.tv_sec = delay / 1000000;
dev->pre_delay.tv_usec = delay % 1000000;
LOGPRINTF(1, "set dev->pre_delay %lu %lu",
dev->pre_delay.tv_sec, dev->pre_delay.tv_usec);
return res;
}
int uirt2_calc_freq(int freq)
{
if (freq > 39000) {
return UIRT2_FREQ_40;
} else if (freq > 37000) {
return UIRT2_FREQ_38;
} else {
return UIRT2_FREQ_36;
}
}