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/*
* Copyright 2014 by Red Hat, Inc.
*
* 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 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.
*/
/* inputattach clone for ISDV4 serial devices */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <linux/serio.h>
#include <libudev.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <poll.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#include "tools-shared.h"
extern int verbose; /* quiet clang's -Wmissing-variable-declarations */
int verbose = 0;
static void usage(void)
{
printf(
"Usage: %s [options] device\n"
"Options: \n"
"-h, --help - usage\n"
"--verbose - verbose output\n"
"--version - version info\n"
"--baudrate <19200|38400> - set baudrate\n",
program_invocation_short_name
);
}
static int set_line_discipline(int fd, int ldisc)
{
int rc;
rc = ioctl(fd, TIOCSETD, &ldisc);
if (rc < 0)
perror("can't set line discipline");
return rc;
}
static int bind_kernel_driver(int fd)
{
unsigned long devt;
unsigned int id = 0, extra = 0;
devt = SERIO_W8001 | (id << 8) | (extra << 16);
if (ioctl(fd, SPIOCSTYPE, &devt)) {
perror("Failed to set device type");
return -1;
}
return 0;
}
static unsigned int get_baud_rate(int fd)
{
struct stat st;
unsigned int baudrate = 19200;
int id;
struct udev *udev;
struct udev_device *device, *parent;
const char *attr_id = NULL;
if (fstat(fd, &st) == -1)
return 0;
udev = udev_new();
device = udev_device_new_from_devnum(udev, 'c', st.st_rdev);
parent = device;
while (parent) {
attr_id = udev_device_get_sysattr_value(parent, "id");
if (attr_id &&
(strncmp(attr_id, "WACf", 4) == 0 || strncmp(attr_id, "FUJ", 3) == 0))
break;
parent = udev_device_get_parent(parent);
}
/* Devices up to WACf007 are 19200, newer devices are 38400. FUJ
devices are all 19200 */
if (attr_id && sscanf(attr_id, "WACf%x", &id) == 1 && id >= 0x8)
baudrate = 38400;
if (device)
udev_device_unref(device);
udev_unref(udev);
return baudrate;
}
static void sighandler(int signum)
{
/* We don't need to do anything here, triggering the signal is
* enough to trigger EINTR in read() and then reset the line
* discipline in main */
}
int main(int argc, char **argv)
{
int sensor_id;
char *filename;
int fd, rc = 1;
unsigned int baudrate = 0;
int have_baudrate = 0;
int c, optidx = 0;
struct option options[] = {
{"help", 0, NULL, 'h'},
{"verbose", 0, NULL, 'v'},
{"version", 0, NULL, 'V'},
{"baudrate", 1, NULL, 'b'},
{NULL, 0, NULL, 0}
};
while ((c = getopt_long(argc, argv, "h", options, &optidx)) != -1) {
switch(c) {
case 'v':
verbose = 1;
break;
case 'V':
version();
return 0;
case 'b':
have_baudrate = 1;
baudrate = (unsigned int)atoi(optarg);
if (baudrate == 0) {
usage();
return 1;
}
break;
case 'h':
default:
usage();
return 0;
}
}
if (optind == argc) {
usage();
return 1;
}
filename = argv[optind];
fd = open_device(filename);
if (fd < 0)
goto out;
/* only guess if we didn't get a baud rate */
if (!have_baudrate && (baudrate = get_baud_rate(fd)) == 0)
goto out;
set_serial_attr(fd, baudrate);
sensor_id = query_tablet(fd);
if (sensor_id < 0 && !have_baudrate) {
/* query failed, maybe the wrong baud rate? */
baudrate = (baudrate == 19200) ? 38400 : 19200;
printf("Initial tablet query failed. Trying with baud rate %d.\n", baudrate);
set_serial_attr(fd, baudrate);
sensor_id = query_tablet(fd);
}
if (sensor_id < 0) {
fprintf(stderr, "Tablet query failed, cannot initialize.\n");
return 1;
}
/* some of the 19200 tablets can't set the line discipline */
set_line_discipline(fd, N_MOUSE);
if (bind_kernel_driver(fd) < 0) {
fprintf(stderr, "Failed to bind the kernel driver.\n");
goto out;
}
signal(SIGINT, sighandler);
signal(SIGHUP, sighandler);
rc = (int)read(fd, NULL, 0); /* warning fix only, ignore error */
set_line_discipline(fd, 0);
rc = 0;
out:
if (fd >= 0)
close(fd);
return rc;
}
/* vim: set noexpandtab tabstop=8 shiftwidth=8: */
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