thodg/cgminer/fpgautils.c

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• Hash : 1445708f
  Author :
  Date : 2012-07-08T02:35:43
  

  Use standard cfsetispeed/cfsetospeed to set baud rate on *nix

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• fpgautils.c

• /*
   * Copyright 2012 Luke Dashjr
   * Copyright 2012 Andrew Smith
   *
   * 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 3 of the License, or (at your option)
   * any later version.  See COPYING for more details.
   */
  
  #include "config.h"
  
  #include <sys/types.h>
  #include <dirent.h>
  #include <string.h>
  
  #ifndef WIN32
  #include <errno.h>
  #include <termios.h>
  #include <sys/stat.h>
  #include <unistd.h>
  #include <fcntl.h>
  #ifndef O_CLOEXEC
  #define O_CLOEXEC 0
  #endif
  #else
  #include <windows.h>
  #include <io.h>
  #endif
  
  #ifdef HAVE_LIBUDEV
  #include <libudev.h>
  #endif
  
  #include "elist.h"
  #include "fpgautils.h"
  #include "logging.h"
  #include "miner.h"
  
  #ifdef HAVE_LIBUDEV
  char
  serial_autodetect_udev(detectone_func_t detectone, const char*prodname)
  {
  	struct udev *udev = udev_new();
  	struct udev_enumerate *enumerate = udev_enumerate_new(udev);
  	struct udev_list_entry *list_entry;
  	char found = 0;
  
  	udev_enumerate_add_match_subsystem(enumerate, "tty");
  	udev_enumerate_add_match_property(enumerate, "ID_MODEL", prodname);
  	udev_enumerate_scan_devices(enumerate);
  	udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
  		struct udev_device *device = udev_device_new_from_syspath(
  			udev_enumerate_get_udev(enumerate),
  			udev_list_entry_get_name(list_entry)
  		);
  		if (!device)
  			continue;
  
  		const char *devpath = udev_device_get_devnode(device);
  		if (devpath && detectone(devpath))
  			++found;
  
  		udev_device_unref(device);
  	}
  	udev_enumerate_unref(enumerate);
  	udev_unref(udev);
  
  	return found;
  }
  #else
  char
  serial_autodetect_udev(__maybe_unused detectone_func_t detectone, __maybe_unused const char*prodname)
  {
  	return 0;
  }
  #endif
  
  char
  serial_autodetect_devserial(detectone_func_t detectone, const char*prodname)
  {
  #ifndef WIN32
  	DIR *D;
  	struct dirent *de;
  	const char udevdir[] = "/dev/serial/by-id";
  	char devpath[sizeof(udevdir) + 1 + NAME_MAX];
  	char *devfile = devpath + sizeof(udevdir);
  	char found = 0;
  
  	D = opendir(udevdir);
  	if (!D)
  		return 0;
  	memcpy(devpath, udevdir, sizeof(udevdir) - 1);
  	devpath[sizeof(udevdir) - 1] = '/';
  	while ( (de = readdir(D)) ) {
  		if (!strstr(de->d_name, prodname))
  			continue;
  		strcpy(devfile, de->d_name);
  		if (detectone(devpath))
  			++found;
  	}
  	closedir(D);
  
  	return found;
  #else
  	return 0;
  #endif
  }
  
  char
  _serial_detect(const char*dname, detectone_func_t detectone, autoscan_func_t autoscan, bool forceauto)
  {
  	struct string_elist *iter, *tmp;
  	const char*s, *p;
  	bool inhibitauto = false;
  	char found = 0;
  	size_t dnamel = strlen(dname);
  
  	list_for_each_entry_safe(iter, tmp, &scan_devices, list) {
  		s = iter->string;
  		if ((p = strchr(s, ':')) && p[1] != '\0') {
  			size_t plen = p - s;
  			if (plen != dnamel || strncasecmp(s, dname, plen))
  				continue;
  			s = p + 1;
  		}
  		if (!strcmp(s, "auto"))
  			forceauto = true;
  		else
  		if (!strcmp(s, "noauto"))
  			inhibitauto = true;
  		else
  		if (detectone(s)) {
  			string_elist_del(iter);
  			inhibitauto = true;
  			++found;
  		}
  	}
  
  	if ((forceauto || !inhibitauto) && autoscan)
  		found += autoscan();
  
  	return found;
  }
  
  int
  serial_open(const char*devpath, unsigned long baud, signed short timeout, bool purge)
  {
  #ifdef WIN32
  	HANDLE hSerial = CreateFile(devpath, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
  	if (unlikely(hSerial == INVALID_HANDLE_VALUE))
  	{
  		DWORD e = GetLastError();
  		switch (e) {
  		case ERROR_ACCESS_DENIED:
  			applog(LOG_ERR, "Do not have user privileges required to open %s", devpath);
  			break;
  		case ERROR_SHARING_VIOLATION:
  			applog(LOG_ERR, "%s is already in use by another process", devpath);
  			break;
  		default:
  			applog(LOG_DEBUG, "Open %s failed, GetLastError:%u", devpath, e);
  			break;
  		}
  		return -1;
  	}
  
  	// thanks to af_newbie for pointers about this
  	COMMCONFIG comCfg = {0};
  	comCfg.dwSize = sizeof(COMMCONFIG);
  	comCfg.wVersion = 1;
  	comCfg.dcb.DCBlength = sizeof(DCB);
  	comCfg.dcb.BaudRate = baud;
  	comCfg.dcb.fBinary = 1;
  	comCfg.dcb.fDtrControl = DTR_CONTROL_ENABLE;
  	comCfg.dcb.fRtsControl = RTS_CONTROL_ENABLE;
  	comCfg.dcb.ByteSize = 8;
  
  	SetCommConfig(hSerial, &comCfg, sizeof(comCfg));
  
  	const DWORD ctoms = (timeout == -1) ? 30000 : (timeout * 100);
  	COMMTIMEOUTS cto = {ctoms, 0, ctoms, 0, ctoms};
  	SetCommTimeouts(hSerial, &cto);
  
  	if (purge) {
  		PurgeComm(hSerial, PURGE_RXABORT);
  		PurgeComm(hSerial, PURGE_TXABORT);
  		PurgeComm(hSerial, PURGE_RXCLEAR);
  		PurgeComm(hSerial, PURGE_TXCLEAR);
  	}
  
  	return _open_osfhandle((LONG)hSerial, 0);
  #else
  	int fdDev = open(devpath, O_RDWR | O_CLOEXEC | O_NOCTTY);
  
  	if (unlikely(fdDev == -1))
  	{
  		if (errno == EACCES)
  			applog(LOG_ERR, "Do not have user privileges required to open %s", devpath);
  		else
  			applog(LOG_DEBUG, "Open %s failed, errno:%d", devpath, errno);
  
  		return -1;
  	}
  
  	struct termios my_termios;
  
  	tcgetattr(fdDev, &my_termios);
  
  	switch (baud) {
  	case 0:
  		break;
  	case 115200:
  		cfsetispeed( &my_termios, B115200 );
  		cfsetospeed( &my_termios, B115200 );
  		break;
  	// TODO: try some higher speeds with the Icarus and BFL to see
  	// if they support them and if setting them makes any difference
  	default:
  		applog(LOG_WARNING, "Unrecognized baud rate: %lu", baud);
  	}
  
  	my_termios.c_cflag |= CS8;
  	my_termios.c_cflag |= CREAD;
  	my_termios.c_cflag |= CLOCAL;
  	my_termios.c_cflag &= ~(CSIZE | PARENB);
  
  	my_termios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK |
  				ISTRIP | INLCR | IGNCR | ICRNL | IXON);
  	my_termios.c_oflag &= ~OPOST;
  	my_termios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
  
  	if (timeout >= 0) {
  		my_termios.c_cc[VTIME] = (cc_t)timeout;
  		my_termios.c_cc[VMIN] = 0;
  	}
  
  	tcsetattr(fdDev, TCSANOW, &my_termios);
  	if (purge)
  		tcflush(fdDev, TCIOFLUSH);
  	return fdDev;
  #endif
  }
  
  ssize_t
  _serial_read(int fd, char *buf, size_t bufsiz, char *eol)
  {
  	ssize_t len, tlen = 0;
  	while (bufsiz) {
  		len = read(fd, buf, eol ? 1 : bufsiz);
  		if (len < 1)
  			break;
  		tlen += len;
  		if (eol && *eol == buf[0])
  			break;
  		buf += len;
  		bufsiz -= len;
  	}
  	return tlen;
  }
  
  static FILE*
  _open_bitstream(const char*path, const char*subdir, const char*filename)
  {
  	char fullpath[PATH_MAX];
  	strcpy(fullpath, path);
  	strcat(fullpath, "/");
  	if (subdir) {
  		strcat(fullpath, subdir);
  		strcat(fullpath, "/");
  	}
  	strcat(fullpath, filename);
  	return fopen(fullpath, "rb");
  }
  #define _open_bitstream(path, subdir)  do {  \
  	f = _open_bitstream(path, subdir, filename);  \
  	if (f)  \
  		return f;  \
  } while(0)
  
  #define _open_bitstream3(path)  do {  \
  	_open_bitstream(path, dname);  \
  	_open_bitstream(path, "bitstreams");  \
  	_open_bitstream(path, NULL);  \
  } while(0)
  
  FILE*
  open_bitstream(const char*dname, const char*filename)
  {
  	FILE *f;
  
  	_open_bitstream3(opt_kernel_path);
  	_open_bitstream3(cgminer_path);
  	_open_bitstream3(".");
  
  	return NULL;
  }
  

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